src/ap/wpa_auth_ft.c

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