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 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         u8 *anonce, *snonce;
 618
 619         if (sm == NULL)
 620                 return pos;
 621
 622         conf = &sm->wpa_auth->conf;
 623
 624         if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
 625             sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
 626                 return pos;
 627
 628         end = pos + max_len;
 629
 630         if (auth_alg == WLAN_AUTH_FT) {
 631                 /*
 632                  * RSN (only present if this is a Reassociation Response and
 633                  * part of a fast BSS transition)
 634                  */
 635                 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
 636                 if (res < 0)
 637                         return pos;
 638                 rsnie = pos;
 639                 rsnie_len = res;
 640                 pos += res;
 641         }
 642
 643         /* Mobility Domain Information */
 644         res = wpa_write_mdie(conf, pos, end - pos);
 645         if (res < 0)
 646                 return pos;
 647         mdie = pos;
 648         mdie_len = res;
 649         pos += res;
 650
 651         /* Fast BSS Transition Information */
 652         if (auth_alg == WLAN_AUTH_FT) {
 653                 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
 654                 r0kh_id = sm->r0kh_id;
 655                 r0kh_id_len = sm->r0kh_id_len;
 656                 anonce = sm->ANonce;
 657                 snonce = sm->SNonce;
 658 #ifdef CONFIG_IEEE80211W
 659                 if (sm->mgmt_frame_prot) {
 660                         u8 *igtk;
 661                         size_t igtk_len;
 662                         u8 *nbuf;
 663                         igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
 664                         if (igtk == NULL) {
 665                                 os_free(subelem);
 666                                 return pos;
 667                         }
 668                         nbuf = os_realloc(subelem, subelem_len + igtk_len);
 669                         if (nbuf == NULL) {
 670                                 os_free(subelem);
 671                                 os_free(igtk);
 672                                 return pos;
 673                         }
 674                         subelem = nbuf;
 675                         os_memcpy(subelem + subelem_len, igtk, igtk_len);
 676                         subelem_len += igtk_len;
 677                         os_free(igtk);
 678                 }
 679 #endif /* CONFIG_IEEE80211W */
 680         } else {
 681                 r0kh_id = conf->r0_key_holder;
 682                 r0kh_id_len = conf->r0_key_holder_len;
 683                 anonce = NULL;
 684                 snonce = NULL;
 685         }
 686         res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
 687                              end - pos, subelem, subelem_len);
 688         os_free(subelem);
 689         if (res < 0)
 690                 return pos;
 691         ftie = pos;
 692         ftie_len = res;
 693         pos += res;
 694
 695         _ftie = (struct rsn_ftie *) (ftie + 2);
 696         if (auth_alg == WLAN_AUTH_FT)
 697                 _ftie->mic_control[1] = 3; /* Information element count */
 698
 699         ric_start = pos;
 700         if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
 701                 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
 702                 if (auth_alg == WLAN_AUTH_FT)
 703                         _ftie->mic_control[1] +=
 704                                 ieee802_11_ie_count(ric_start,
 705                                                     pos - ric_start);
 706         }
 707         if (ric_start == pos)
 708                 ric_start = NULL;
 709
 710         if (auth_alg == WLAN_AUTH_FT &&
 711             wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
 712                        mdie, mdie_len, ftie, ftie_len,
 713                        rsnie, rsnie_len,
 714                        ric_start, ric_start ? pos - ric_start : 0,
 715                        _ftie->mic) < 0)
 716                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
 717
 718         return pos;
 719 }
 720
 721
 722 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
 723                              struct wpa_ft_ies *parse)
 724 {
 725         const u8 *end, *pos;
 726
 727         parse->ftie = ie;
 728         parse->ftie_len = ie_len;
 729
 730         pos = ie + sizeof(struct rsn_ftie);
 731         end = ie + ie_len;
 732
 733         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 734                 switch (pos[0]) {
 735                 case FTIE_SUBELEM_R1KH_ID:
 736                         if (pos[1] != FT_R1KH_ID_LEN) {
 737                                 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
 738                                            "length in FTIE: %d", pos[1]);
 739                                 return -1;
 740                         }
 741                         parse->r1kh_id = pos + 2;
 742                         break;
 743                 case FTIE_SUBELEM_GTK:
 744                         parse->gtk = pos + 2;
 745                         parse->gtk_len = pos[1];
 746                         break;
 747                 case FTIE_SUBELEM_R0KH_ID:
 748                         if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
 749                                 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
 750                                            "length in FTIE: %d", pos[1]);
 751                                 return -1;
 752                         }
 753                         parse->r0kh_id = pos + 2;
 754                         parse->r0kh_id_len = pos[1];
 755                         break;
 756                 }
 757
 758                 pos += 2 + pos[1];
 759         }
 760
 761         return 0;
 762 }
 763
 764
 765 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
 766                             struct wpa_ft_ies *parse)
 767 {
 768         const u8 *end, *pos;
 769         struct wpa_ie_data data;
 770         int ret;
 771         const struct rsn_ftie *ftie;
 772         int prot_ie_count = 0;
 773
 774         os_memset(parse, 0, sizeof(*parse));
 775         if (ies == NULL)
 776                 return 0;
 777
 778         pos = ies;
 779         end = ies + ies_len;
 780         while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
 781                 switch (pos[0]) {
 782                 case WLAN_EID_RSN:
 783                         parse->rsn = pos + 2;
 784                         parse->rsn_len = pos[1];
 785                         ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
 786                                                    parse->rsn_len + 2,
 787                                                    &data);
 788                         if (ret < 0) {
 789                                 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
 790                                            "RSN IE: %d", ret);
 791                                 return -1;
 792                         }
 793                         if (data.num_pmkid == 1 && data.pmkid)
 794                                 parse->rsn_pmkid = data.pmkid;
 795                         break;
 796                 case WLAN_EID_MOBILITY_DOMAIN:
 797                         parse->mdie = pos + 2;
 798                         parse->mdie_len = pos[1];
 799                         break;
 800                 case WLAN_EID_FAST_BSS_TRANSITION:
 801                         if (pos[1] < sizeof(*ftie))
 802                                 return -1;
 803                         ftie = (const struct rsn_ftie *) (pos + 2);
 804                         prot_ie_count = ftie->mic_control[1];
 805                         if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
 806                                 return -1;
 807                         break;
 808                 case WLAN_EID_RIC_DATA:
 809                         if (parse->ric == NULL)
 810                                 parse->ric = pos;
 811                 }
 812
 813                 pos += 2 + pos[1];
 814         }
 815
 816         if (prot_ie_count == 0)
 817                 return 0; /* no MIC */
 818
 819         /*
 820          * Check that the protected IE count matches with IEs included in the
 821          * frame.
 822          */
 823         if (parse->rsn)
 824                 prot_ie_count--;
 825         if (parse->mdie)
 826                 prot_ie_count--;
 827         if (parse->ftie)
 828                 prot_ie_count--;
 829         if (prot_ie_count < 0) {
 830                 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
 831                            "the protected IE count");
 832                 return -1;
 833         }
 834
 835         if (prot_ie_count == 0 && parse->ric) {
 836                 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
 837                            "included in protected IE count");
 838                 return -1;
 839         }
 840
 841         /* Determine the end of the RIC IE(s) */
 842         pos = parse->ric;
 843         while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
 844                prot_ie_count) {
 845                 prot_ie_count--;
 846                 pos += 2 + pos[1];
 847         }
 848         parse->ric_len = pos - parse->ric;
 849         if (prot_ie_count) {
 850                 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
 851                            "frame", (int) prot_ie_count);
 852                 return -1;
 853         }
 854
 855         return 0;
 856 }
 857
 858
 859 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
 860                                    int vlan_id,
 861                                    enum wpa_alg alg, const u8 *addr, int idx,
 862                                    u8 *key, size_t key_len)
 863 {
 864         if (wpa_auth->cb.set_key == NULL)
 865                 return -1;
 866         return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
 867                                     key, key_len);
 868 }
 869
 870
 871 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
 872 {
 873         enum wpa_alg alg;
 874         int klen;
 875
 876         /* MLME-SETKEYS.request(PTK) */
 877         if (sm->pairwise == WPA_CIPHER_TKIP) {
 878                 alg = WPA_ALG_TKIP;
 879                 klen = 32;
 880         } else if (sm->pairwise == WPA_CIPHER_CCMP) {
 881                 alg = WPA_ALG_CCMP;
 882                 klen = 16;
 883         } else {
 884                 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
 885                            "PTK configuration", sm->pairwise);
 886                 return;
 887         }
 888
 889         /* FIX: add STA entry to kernel/driver here? The set_key will fail
 890          * most likely without this.. At the moment, STA entry is added only
 891          * after association has been completed. This function will be called
 892          * again after association to get the PTK configured, but that could be
 893          * optimized by adding the STA entry earlier.
 894          */
 895         if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
 896                              sm->PTK.tk1, klen))
 897                 return;
 898
 899         /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
 900         sm->pairwise_set = TRUE;
 901 }
 902
 903
 904 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
 905                                    const u8 *ies, size_t ies_len,
 906                                    u8 **resp_ies, size_t *resp_ies_len)
 907 {
 908         struct rsn_mdie *mdie;
 909         struct rsn_ftie *ftie;
 910         u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
 911         u8 ptk_name[WPA_PMK_NAME_LEN];
 912         struct wpa_auth_config *conf;
 913         struct wpa_ft_ies parse;
 914         size_t buflen, ptk_len;
 915         int ret;
 916         u8 *pos, *end;
 917         int pairwise;
 918
 919         *resp_ies = NULL;
 920         *resp_ies_len = 0;
 921
 922         sm->pmk_r1_name_valid = 0;
 923         conf = &sm->wpa_auth->conf;
 924
 925         wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
 926                     ies, ies_len);
 927
 928         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
 929                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
 930                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 931         }
 932
 933         mdie = (struct rsn_mdie *) parse.mdie;
 934         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
 935             os_memcmp(mdie->mobility_domain,
 936                       sm->wpa_auth->conf.mobility_domain,
 937                       MOBILITY_DOMAIN_ID_LEN) != 0) {
 938                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
 939                 return WLAN_STATUS_INVALID_MDIE;
 940         }
 941
 942         ftie = (struct rsn_ftie *) parse.ftie;
 943         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
 944                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
 945                 return WLAN_STATUS_INVALID_FTIE;
 946         }
 947
 948         os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
 949
 950         if (parse.r0kh_id == NULL) {
 951                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
 952                 return WLAN_STATUS_INVALID_FTIE;
 953         }
 954
 955         wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
 956                     parse.r0kh_id, parse.r0kh_id_len);
 957         os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
 958         sm->r0kh_id_len = parse.r0kh_id_len;
 959
 960         if (parse.rsn_pmkid == NULL) {
 961                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
 962                 return WLAN_STATUS_INVALID_PMKID;
 963         }
 964
 965         wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
 966                     parse.rsn_pmkid, WPA_PMK_NAME_LEN);
 967         wpa_derive_pmk_r1_name(parse.rsn_pmkid,
 968                                sm->wpa_auth->conf.r1_key_holder, sm->addr,
 969                                pmk_r1_name);
 970         wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
 971                     pmk_r1_name, WPA_PMK_NAME_LEN);
 972
 973         if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
 974                     &pairwise) < 0) {
 975                 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
 976                                        sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
 977                         wpa_printf(MSG_DEBUG, "FT: Did not have matching "
 978                                    "PMK-R1 and unknown R0KH-ID");
 979                         return WLAN_STATUS_INVALID_PMKID;
 980                 }
 981
 982                 /*
 983                  * TODO: Should return "status pending" (and the caller should
 984                  * not send out response now). The real response will be sent
 985                  * once the response from R0KH is received.
 986                  */
 987                 return WLAN_STATUS_INVALID_PMKID;
 988         }
 989
 990         wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
 991         sm->pmk_r1_name_valid = 1;
 992         os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
 993
 994         if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
 995                 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
 996                            "ANonce");
 997                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
 998         }
 999
1000         wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1001                     sm->SNonce, WPA_NONCE_LEN);
1002         wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
1003                     sm->ANonce, WPA_NONCE_LEN);
1004
1005         ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
1006         wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
1007                           sm->wpa_auth->addr, pmk_r1_name,
1008                           (u8 *) &sm->PTK, ptk_len, ptk_name);
1009         wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
1010                         (u8 *) &sm->PTK, ptk_len);
1011         wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
1012
1013         sm->pairwise = pairwise;
1014         wpa_ft_install_ptk(sm);
1015
1016         buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
1017                 2 + FT_R1KH_ID_LEN + 200;
1018         *resp_ies = os_zalloc(buflen);
1019         if (*resp_ies == NULL) {
1020                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1021         }
1022
1023         pos = *resp_ies;
1024         end = *resp_ies + buflen;
1025
1026         ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
1027         if (ret < 0) {
1028                 os_free(*resp_ies);
1029                 *resp_ies = NULL;
1030                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1031         }
1032         pos += ret;
1033
1034         ret = wpa_write_mdie(conf, pos, end - pos);
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         ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
1043                              sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
1044         if (ret < 0) {
1045                 os_free(*resp_ies);
1046                 *resp_ies = NULL;
1047                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1048         }
1049         pos += ret;
1050
1051         *resp_ies_len = pos - *resp_ies;
1052
1053         return WLAN_STATUS_SUCCESS;
1054 }
1055
1056
1057 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
1058                          u16 auth_transaction, const u8 *ies, size_t ies_len,
1059                          void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
1060                                     u16 auth_transaction, u16 status,
1061                                     const u8 *ies, size_t ies_len),
1062                          void *ctx)
1063 {
1064         u16 status;
1065         u8 *resp_ies;
1066         size_t resp_ies_len;
1067
1068         if (sm == NULL) {
1069                 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
1070                            "WPA SM not available");
1071                 return;
1072         }
1073
1074         wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
1075                    " BSSID=" MACSTR " transaction=%d",
1076                    MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
1077         status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
1078                                          &resp_ies_len);
1079
1080         wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
1081                    " auth_transaction=%d status=%d",
1082                    MAC2STR(sm->addr), auth_transaction + 1, status);
1083         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1084         cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
1085            resp_ies, resp_ies_len);
1086         os_free(resp_ies);
1087 }
1088
1089
1090 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
1091                             size_t ies_len)
1092 {
1093         struct wpa_ft_ies parse;
1094         struct rsn_mdie *mdie;
1095         struct rsn_ftie *ftie;
1096         u8 mic[16];
1097         unsigned int count;
1098
1099         if (sm == NULL)
1100                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1101
1102         wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
1103
1104         if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
1105                 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
1106                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1107         }
1108
1109         if (parse.rsn == NULL) {
1110                 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
1111                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1112         }
1113
1114         if (parse.rsn_pmkid == NULL) {
1115                 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
1116                 return WLAN_STATUS_INVALID_PMKID;
1117         }
1118
1119         if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
1120         {
1121                 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
1122                            "with the PMKR1Name derived from auth request");
1123                 return WLAN_STATUS_INVALID_PMKID;
1124         }
1125
1126         mdie = (struct rsn_mdie *) parse.mdie;
1127         if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
1128             os_memcmp(mdie->mobility_domain,
1129                       sm->wpa_auth->conf.mobility_domain,
1130                       MOBILITY_DOMAIN_ID_LEN) != 0) {
1131                 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
1132                 return WLAN_STATUS_INVALID_MDIE;
1133         }
1134
1135         ftie = (struct rsn_ftie *) parse.ftie;
1136         if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
1137                 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
1138                 return WLAN_STATUS_INVALID_FTIE;
1139         }
1140
1141         if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
1142                 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
1143                 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
1144                             ftie->snonce, WPA_NONCE_LEN);
1145                 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
1146                             sm->SNonce, WPA_NONCE_LEN);
1147                 return -1;
1148         }
1149
1150         if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
1151                 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
1152                 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
1153                             ftie->anonce, WPA_NONCE_LEN);
1154                 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
1155                             sm->ANonce, WPA_NONCE_LEN);
1156                 return -1;
1157         }
1158
1159
1160         if (parse.r0kh_id == NULL) {
1161                 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
1162                 return -1;
1163         }
1164
1165         if (parse.r0kh_id_len != sm->r0kh_id_len ||
1166             os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
1167                 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
1168                            "the current R0KH-ID");
1169                 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
1170                             parse.r0kh_id, parse.r0kh_id_len);
1171                 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
1172                             sm->r0kh_id, sm->r0kh_id_len);
1173                 return -1;
1174         }
1175
1176         if (parse.r1kh_id == NULL) {
1177                 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
1178                 return -1;
1179         }
1180
1181         if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
1182                       FT_R1KH_ID_LEN) != 0) {
1183                 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
1184                            "ReassocReq");
1185                 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
1186                             parse.r1kh_id, FT_R1KH_ID_LEN);
1187                 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
1188                             sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
1189                 return -1;
1190         }
1191
1192         if (parse.rsn_pmkid == NULL ||
1193             os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
1194                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
1195                            "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
1196                 return -1;
1197         }
1198
1199         count = 3;
1200         if (parse.ric)
1201                 count++;
1202         if (ftie->mic_control[1] != count) {
1203                 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
1204                            "Control: received %u expected %u",
1205                            ftie->mic_control[1], count);
1206                 return -1;
1207         }
1208
1209         if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
1210                        parse.mdie - 2, parse.mdie_len + 2,
1211                        parse.ftie - 2, parse.ftie_len + 2,
1212                        parse.rsn - 2, parse.rsn_len + 2,
1213                        parse.ric, parse.ric_len,
1214                        mic) < 0) {
1215                 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
1216                 return WLAN_STATUS_UNSPECIFIED_FAILURE;
1217         }
1218
1219         if (os_memcmp(mic, ftie->mic, 16) != 0) {
1220                 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
1221                 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
1222                 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
1223                 return WLAN_STATUS_INVALID_FTIE;
1224         }
1225
1226         return WLAN_STATUS_SUCCESS;
1227 }
1228
1229
1230 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
1231 {
1232         const u8 *sta_addr, *target_ap;
1233         const u8 *ies;
1234         size_t ies_len;
1235         u8 action;
1236         struct ft_rrb_frame *frame;
1237
1238         if (sm == NULL)
1239                 return -1;
1240
1241         /*
1242          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1243          * FT Request action frame body[variable]
1244          */
1245
1246         if (len < 14) {
1247                 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
1248                            "(len=%lu)", (unsigned long) len);
1249                 return -1;
1250         }
1251
1252         action = data[1];
1253         sta_addr = data + 2;
1254         target_ap = data + 8;
1255         ies = data + 14;
1256         ies_len = len - 14;
1257
1258         wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
1259                    " Target AP=" MACSTR " Action=%d)",
1260                    MAC2STR(sta_addr), MAC2STR(target_ap), action);
1261
1262         if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
1263                 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
1264                            "STA=" MACSTR " STA-Address=" MACSTR,
1265                            MAC2STR(sm->addr), MAC2STR(sta_addr));
1266                 return -1;
1267         }
1268
1269         /*
1270          * Do some sanity checking on the target AP address (not own and not
1271          * broadcast. This could be extended to filter based on a list of known
1272          * APs in the MD (if such a list were configured).
1273          */
1274         if ((target_ap[0] & 0x01) ||
1275             os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
1276                 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
1277                            "frame");
1278                 return -1;
1279         }
1280
1281         wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
1282
1283         /* RRB - Forward action frame to the target AP */
1284         frame = os_malloc(sizeof(*frame) + len);
1285         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1286         frame->packet_type = FT_PACKET_REQUEST;
1287         frame->action_length = host_to_le16(len);
1288         os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
1289         os_memcpy(frame + 1, data, len);
1290
1291         wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
1292                         sizeof(*frame) + len);
1293         os_free(frame);
1294
1295         return 0;
1296 }
1297
1298
1299 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
1300                                  const u8 *current_ap, const u8 *sta_addr,
1301                                  const u8 *body, size_t len)
1302 {
1303         struct wpa_state_machine *sm;
1304         u16 status;
1305         u8 *resp_ies, *pos;
1306         size_t resp_ies_len, rlen;
1307         struct ft_rrb_frame *frame;
1308
1309         sm = wpa_ft_add_sta(wpa_auth, sta_addr);
1310         if (sm == NULL) {
1311                 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
1312                            "RRB Request");
1313                 return -1;
1314         }
1315
1316         wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
1317
1318         status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
1319                                          &resp_ies_len);
1320
1321         wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
1322                    " CurrentAP=" MACSTR " status=%d",
1323                    MAC2STR(sm->addr), MAC2STR(current_ap), status);
1324         wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
1325
1326         /* RRB - Forward action frame response to the Current AP */
1327
1328         /*
1329          * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
1330          * Status_Code[2] FT Request action frame body[variable]
1331          */
1332         rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
1333
1334         frame = os_malloc(sizeof(*frame) + rlen);
1335         frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1336         frame->packet_type = FT_PACKET_RESPONSE;
1337         frame->action_length = host_to_le16(rlen);
1338         os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
1339         pos = (u8 *) (frame + 1);
1340         *pos++ = WLAN_ACTION_FT;
1341         *pos++ = 2; /* Action: Response */
1342         os_memcpy(pos, sta_addr, ETH_ALEN);
1343         pos += ETH_ALEN;
1344         os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
1345         pos += ETH_ALEN;
1346         WPA_PUT_LE16(pos, status);
1347         pos += 2;
1348         if (resp_ies) {
1349                 os_memcpy(pos, resp_ies, resp_ies_len);
1350                 os_free(resp_ies);
1351         }
1352
1353         wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
1354                         sizeof(*frame) + rlen);
1355         os_free(frame);
1356
1357         return 0;
1358 }
1359
1360
1361 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
1362                               const u8 *src_addr,
1363                               const u8 *data, size_t data_len)
1364 {
1365         struct ft_r0kh_r1kh_pull_frame *frame, f;
1366         struct ft_remote_r1kh *r1kh;
1367         struct ft_r0kh_r1kh_resp_frame resp, r;
1368         u8 pmk_r0[PMK_LEN];
1369         int pairwise;
1370
1371         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
1372
1373         if (data_len < sizeof(*frame))
1374                 return -1;
1375
1376         r1kh = wpa_auth->conf.r1kh_list;
1377         while (r1kh) {
1378                 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
1379                         break;
1380                 r1kh = r1kh->next;
1381         }
1382         if (r1kh == NULL) {
1383                 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
1384                            "PMK-R1 pull source address " MACSTR,
1385                            MAC2STR(src_addr));
1386                 return -1;
1387         }
1388
1389         frame = (struct ft_r0kh_r1kh_pull_frame *) data;
1390         /* aes_unwrap() does not support inplace decryption, so use a temporary
1391          * buffer for the data. */
1392         if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
1393                        frame->nonce, f.nonce) < 0) {
1394                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1395                            "request from " MACSTR, MAC2STR(src_addr));
1396                 return -1;
1397         }
1398
1399         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1400                     f.nonce, sizeof(f.nonce));
1401         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
1402                     f.pmk_r0_name, WPA_PMK_NAME_LEN);
1403         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1404                    MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
1405
1406         os_memset(&resp, 0, sizeof(resp));
1407         resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1408         resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
1409         resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
1410         os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
1411
1412         /* aes_wrap() does not support inplace encryption, so use a temporary
1413          * buffer for the data. */
1414         os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
1415         os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
1416         os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
1417         if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
1418                                 &pairwise) < 0) {
1419                 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
1420                            "PMK-R1 pull");
1421                 return -1;
1422         }
1423
1424         wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
1425                           r.pmk_r1, r.pmk_r1_name);
1426         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
1427         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
1428                     WPA_PMK_NAME_LEN);
1429         r.pairwise = pairwise;
1430
1431         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1432                      r.nonce, resp.nonce) < 0) {
1433                 os_memset(pmk_r0, 0, PMK_LEN);
1434                 return -1;
1435         }
1436
1437         os_memset(pmk_r0, 0, PMK_LEN);
1438
1439         wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
1440
1441         return 0;
1442 }
1443
1444
1445 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
1446                               const u8 *src_addr,
1447                               const u8 *data, size_t data_len)
1448 {
1449         struct ft_r0kh_r1kh_resp_frame *frame, f;
1450         struct ft_remote_r0kh *r0kh;
1451         int pairwise;
1452
1453         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
1454
1455         if (data_len < sizeof(*frame))
1456                 return -1;
1457
1458         r0kh = wpa_auth->conf.r0kh_list;
1459         while (r0kh) {
1460                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1461                         break;
1462                 r0kh = r0kh->next;
1463         }
1464         if (r0kh == NULL) {
1465                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1466                            "PMK-R0 pull response source address " MACSTR,
1467                            MAC2STR(src_addr));
1468                 return -1;
1469         }
1470
1471         frame = (struct ft_r0kh_r1kh_resp_frame *) data;
1472         /* aes_unwrap() does not support inplace decryption, so use a temporary
1473          * buffer for the data. */
1474         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
1475                        frame->nonce, f.nonce) < 0) {
1476                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
1477                            "response from " MACSTR, MAC2STR(src_addr));
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 pull response did not use a "
1484                            "matching R1KH-ID");
1485                 return -1;
1486         }
1487
1488         /* TODO: verify that <nonce,s1kh_id> matches with a pending request
1489          * and call this requests callback function to finish request
1490          * processing */
1491
1492         pairwise = le_to_host16(f.pairwise);
1493         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
1494                     f.nonce, sizeof(f.nonce));
1495         wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
1496                    MACSTR " pairwise=0x%x",
1497                    MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1498         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
1499                         f.pmk_r1, PMK_LEN);
1500         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
1501                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1502
1503         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1504                             pairwise);
1505         os_memset(f.pmk_r1, 0, PMK_LEN);
1506
1507         return 0;
1508 }
1509
1510
1511 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
1512                               const u8 *src_addr,
1513                               const u8 *data, size_t data_len)
1514 {
1515         struct ft_r0kh_r1kh_push_frame *frame, f;
1516         struct ft_remote_r0kh *r0kh;
1517         struct os_time now;
1518         os_time_t tsend;
1519         int pairwise;
1520
1521         wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
1522
1523         if (data_len < sizeof(*frame))
1524                 return -1;
1525
1526         r0kh = wpa_auth->conf.r0kh_list;
1527         while (r0kh) {
1528                 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
1529                         break;
1530                 r0kh = r0kh->next;
1531         }
1532         if (r0kh == NULL) {
1533                 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
1534                            "PMK-R0 push source address " MACSTR,
1535                            MAC2STR(src_addr));
1536                 return -1;
1537         }
1538
1539         frame = (struct ft_r0kh_r1kh_push_frame *) data;
1540         /* aes_unwrap() does not support inplace decryption, so use a temporary
1541          * buffer for the data. */
1542         if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1543                        frame->timestamp, f.timestamp) < 0) {
1544                 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
1545                            MACSTR, MAC2STR(src_addr));
1546                 return -1;
1547         }
1548
1549         os_get_time(&now);
1550         tsend = WPA_GET_LE32(f.timestamp);
1551         if ((now.sec > tsend && now.sec - tsend > 60) ||
1552             (now.sec < tsend && tsend - now.sec > 60)) {
1553                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
1554                            "timestamp: sender time %d own time %d\n",
1555                            (int) tsend, (int) now.sec);
1556                 return -1;
1557         }
1558
1559         if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
1560             != 0) {
1561                 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
1562                            "R1KH-ID (received " MACSTR " own " MACSTR ")",
1563                            MAC2STR(f.r1kh_id),
1564                            MAC2STR(wpa_auth->conf.r1_key_holder));
1565                 return -1;
1566         }
1567
1568         pairwise = le_to_host16(f.pairwise);
1569         wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
1570                    MACSTR " pairwise=0x%x",
1571                    MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
1572         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
1573                         f.pmk_r1, PMK_LEN);
1574         wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
1575                         f.pmk_r1_name, WPA_PMK_NAME_LEN);
1576
1577         wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
1578                             pairwise);
1579         os_memset(f.pmk_r1, 0, PMK_LEN);
1580
1581         return 0;
1582 }
1583
1584
1585 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
1586                   const u8 *data, size_t data_len)
1587 {
1588         struct ft_rrb_frame *frame;
1589         u16 alen;
1590         const u8 *pos, *end, *start;
1591         u8 action;
1592         const u8 *sta_addr, *target_ap_addr;
1593
1594         wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
1595                    MAC2STR(src_addr));
1596
1597         if (data_len < sizeof(*frame)) {
1598                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
1599                            (unsigned long) data_len);
1600                 return -1;
1601         }
1602
1603         pos = data;
1604         frame = (struct ft_rrb_frame *) pos;
1605         pos += sizeof(*frame);
1606
1607         alen = le_to_host16(frame->action_length);
1608         wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
1609                    "action_length=%d ap_address=" MACSTR,
1610                    frame->frame_type, frame->packet_type, alen,
1611                    MAC2STR(frame->ap_address));
1612
1613         if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
1614                 /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
1615                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
1616                            "unrecognized type %d", frame->frame_type);
1617                 return -1;
1618         }
1619
1620         if (alen > data_len - sizeof(*frame)) {
1621                 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
1622                            "frame");
1623                 return -1;
1624         }
1625
1626         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
1627                 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
1628         if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
1629                 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
1630         if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
1631                 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
1632
1633         wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
1634
1635         if (alen < 1 + 1 + 2 * ETH_ALEN) {
1636                 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
1637                            "room for Action Frame body); alen=%lu",
1638                            (unsigned long) alen);
1639                 return -1;
1640         }
1641         start = pos;
1642         end = pos + alen;
1643
1644         if (*pos != WLAN_ACTION_FT) {
1645                 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
1646                            "%d", *pos);
1647                 return -1;
1648         }
1649
1650         pos++;
1651         action = *pos++;
1652         sta_addr = pos;
1653         pos += ETH_ALEN;
1654         target_ap_addr = pos;
1655         pos += ETH_ALEN;
1656         wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
1657                    MACSTR " target_ap_addr=" MACSTR,
1658                    action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
1659
1660         if (frame->packet_type == FT_PACKET_REQUEST) {
1661                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
1662
1663                 if (action != 1) {
1664                         wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
1665                                    "RRB Request", action);
1666                         return -1;
1667                 }
1668
1669                 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
1670                         wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
1671                                    "RRB Request does not match with own "
1672                                    "address");
1673                         return -1;
1674                 }
1675
1676                 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
1677                                           sta_addr, pos, end - pos) < 0)
1678                         return -1;
1679         } else if (frame->packet_type == FT_PACKET_RESPONSE) {
1680                 u16 status_code;
1681
1682                 if (end - pos < 2) {
1683                         wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
1684                                    "code in RRB Response");
1685                         return -1;
1686                 }
1687                 status_code = WPA_GET_LE16(pos);
1688                 pos += 2;
1689
1690                 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
1691                            "(status_code=%d)", status_code);
1692
1693                 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
1694                         return -1;
1695         } else {
1696                 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
1697                            "packet_type %d", frame->packet_type);
1698                 return -1;
1699         }
1700
1701         return 0;
1702 }
1703
1704
1705 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
1706                                    struct wpa_ft_pmk_r0_sa *pmk_r0,
1707                                    struct ft_remote_r1kh *r1kh,
1708                                    const u8 *s1kh_id, int pairwise)
1709 {
1710         struct ft_r0kh_r1kh_push_frame frame, f;
1711         struct os_time now;
1712
1713         os_memset(&frame, 0, sizeof(frame));
1714         frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
1715         frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
1716         frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
1717         os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
1718
1719         /* aes_wrap() does not support inplace encryption, so use a temporary
1720          * buffer for the data. */
1721         os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
1722         os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
1723         os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
1724         wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
1725                           s1kh_id, f.pmk_r1, f.pmk_r1_name);
1726         wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
1727         wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
1728         wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
1729                     WPA_PMK_NAME_LEN);
1730         os_get_time(&now);
1731         WPA_PUT_LE32(f.timestamp, now.sec);
1732         f.pairwise = pairwise;
1733         if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
1734                      f.timestamp, frame.timestamp) < 0)
1735                 return;
1736
1737         wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
1738 }
1739
1740
1741 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
1742 {
1743         struct wpa_ft_pmk_r0_sa *r0;
1744         struct ft_remote_r1kh *r1kh;
1745
1746         if (!wpa_auth->conf.pmk_r1_push)
1747                 return;
1748
1749         r0 = wpa_auth->ft_pmk_cache->pmk_r0;
1750         while (r0) {
1751                 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
1752                         break;
1753                 r0 = r0->next;
1754         }
1755
1756         if (r0 == NULL || r0->pmk_r1_pushed)
1757                 return;
1758         r0->pmk_r1_pushed = 1;
1759
1760         wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
1761                    "for STA " MACSTR, MAC2STR(addr));
1762
1763         r1kh = wpa_auth->conf.r1kh_list;
1764         while (r1kh) {
1765                 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
1766                 r1kh = r1kh->next;
1767         }
1768 }
1769
1770 #endif /* CONFIG_IEEE80211R */