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