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