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00015 #include "utils/includes.h"
00016
00017 #include "utils/common.h"
00018 #include "common/ieee802_11_defs.h"
00019 #include "common/ieee802_11_common.h"
00020 #include "crypto/aes_wrap.h"
00021 #include "ap_config.h"
00022 #include "ieee802_11.h"
00023 #include "wmm.h"
00024 #include "wpa_auth.h"
00025 #include "wpa_auth_i.h"
00026 #include "wpa_auth_ie.h"
00027
00028
00029 #ifdef CONFIG_IEEE80211R
00030
00031 struct wpa_ft_ies {
00032 const u8 *mdie;
00033 size_t mdie_len;
00034 const u8 *ftie;
00035 size_t ftie_len;
00036 const u8 *r1kh_id;
00037 const u8 *gtk;
00038 size_t gtk_len;
00039 const u8 *r0kh_id;
00040 size_t r0kh_id_len;
00041 const u8 *rsn;
00042 size_t rsn_len;
00043 const u8 *rsn_pmkid;
00044 const u8 *ric;
00045 size_t ric_len;
00046 };
00047
00048
00049 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
00050 struct wpa_ft_ies *parse);
00051
00052
00053 static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
00054 const u8 *data, size_t data_len)
00055 {
00056 if (wpa_auth->cb.send_ether == NULL)
00057 return -1;
00058 return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
00059 data, data_len);
00060 }
00061
00062
00063 static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
00064 const u8 *dst, const u8 *data, size_t data_len)
00065 {
00066 if (wpa_auth->cb.send_ft_action == NULL)
00067 return -1;
00068 return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
00069 data, data_len);
00070 }
00071
00072
00073 static struct wpa_state_machine *
00074 wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
00075 {
00076 if (wpa_auth->cb.add_sta == NULL)
00077 return NULL;
00078 return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
00079 }
00080
00081
00082 int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
00083 {
00084 u8 *pos = buf;
00085 u8 capab;
00086 if (len < 2 + sizeof(struct rsn_mdie))
00087 return -1;
00088
00089 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
00090 *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
00091 os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
00092 pos += MOBILITY_DOMAIN_ID_LEN;
00093 capab = RSN_FT_CAPAB_FT_OVER_DS;
00094 *pos++ = capab;
00095
00096 return pos - buf;
00097 }
00098
00099
00100 int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
00101 size_t r0kh_id_len,
00102 const u8 *anonce, const u8 *snonce,
00103 u8 *buf, size_t len, const u8 *subelem,
00104 size_t subelem_len)
00105 {
00106 u8 *pos = buf, *ielen;
00107 struct rsn_ftie *hdr;
00108
00109 if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
00110 subelem_len)
00111 return -1;
00112
00113 *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
00114 ielen = pos++;
00115
00116 hdr = (struct rsn_ftie *) pos;
00117 os_memset(hdr, 0, sizeof(*hdr));
00118 pos += sizeof(*hdr);
00119 WPA_PUT_LE16(hdr->mic_control, 0);
00120 if (anonce)
00121 os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
00122 if (snonce)
00123 os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
00124
00125
00126 *pos++ = FTIE_SUBELEM_R1KH_ID;
00127 *pos++ = FT_R1KH_ID_LEN;
00128 os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
00129 pos += FT_R1KH_ID_LEN;
00130
00131 if (r0kh_id) {
00132 *pos++ = FTIE_SUBELEM_R0KH_ID;
00133 *pos++ = r0kh_id_len;
00134 os_memcpy(pos, r0kh_id, r0kh_id_len);
00135 pos += r0kh_id_len;
00136 }
00137
00138 if (subelem) {
00139 os_memcpy(pos, subelem, subelem_len);
00140 pos += subelem_len;
00141 }
00142
00143 *ielen = pos - buf - 2;
00144
00145 return pos - buf;
00146 }
00147
00148
00149 struct wpa_ft_pmk_r0_sa {
00150 struct wpa_ft_pmk_r0_sa *next;
00151 u8 pmk_r0[PMK_LEN];
00152 u8 pmk_r0_name[WPA_PMK_NAME_LEN];
00153 u8 spa[ETH_ALEN];
00154 int pairwise;
00155
00156 int pmk_r1_pushed;
00157 };
00158
00159 struct wpa_ft_pmk_r1_sa {
00160 struct wpa_ft_pmk_r1_sa *next;
00161 u8 pmk_r1[PMK_LEN];
00162 u8 pmk_r1_name[WPA_PMK_NAME_LEN];
00163 u8 spa[ETH_ALEN];
00164 int pairwise;
00165
00166 };
00167
00168 struct wpa_ft_pmk_cache {
00169 struct wpa_ft_pmk_r0_sa *pmk_r0;
00170 struct wpa_ft_pmk_r1_sa *pmk_r1;
00171 };
00172
00173 struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
00174 {
00175 struct wpa_ft_pmk_cache *cache;
00176
00177 cache = os_zalloc(sizeof(*cache));
00178
00179 return cache;
00180 }
00181
00182
00183 void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
00184 {
00185 struct wpa_ft_pmk_r0_sa *r0, *r0prev;
00186 struct wpa_ft_pmk_r1_sa *r1, *r1prev;
00187
00188 r0 = cache->pmk_r0;
00189 while (r0) {
00190 r0prev = r0;
00191 r0 = r0->next;
00192 os_memset(r0prev->pmk_r0, 0, PMK_LEN);
00193 os_free(r0prev);
00194 }
00195
00196 r1 = cache->pmk_r1;
00197 while (r1) {
00198 r1prev = r1;
00199 r1 = r1->next;
00200 os_memset(r1prev->pmk_r1, 0, PMK_LEN);
00201 os_free(r1prev);
00202 }
00203
00204 os_free(cache);
00205 }
00206
00207
00208 static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
00209 const u8 *spa, const u8 *pmk_r0,
00210 const u8 *pmk_r0_name, int pairwise)
00211 {
00212 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
00213 struct wpa_ft_pmk_r0_sa *r0;
00214
00215
00216
00217 r0 = os_zalloc(sizeof(*r0));
00218 if (r0 == NULL)
00219 return -1;
00220
00221 os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
00222 os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
00223 os_memcpy(r0->spa, spa, ETH_ALEN);
00224 r0->pairwise = pairwise;
00225
00226 r0->next = cache->pmk_r0;
00227 cache->pmk_r0 = r0;
00228
00229 return 0;
00230 }
00231
00232
00233 static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
00234 const u8 *spa, const u8 *pmk_r0_name,
00235 u8 *pmk_r0, int *pairwise)
00236 {
00237 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
00238 struct wpa_ft_pmk_r0_sa *r0;
00239
00240 r0 = cache->pmk_r0;
00241 while (r0) {
00242 if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
00243 os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
00244 == 0) {
00245 os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
00246 if (pairwise)
00247 *pairwise = r0->pairwise;
00248 return 0;
00249 }
00250
00251 r0 = r0->next;
00252 }
00253
00254 return -1;
00255 }
00256
00257
00258 static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
00259 const u8 *spa, const u8 *pmk_r1,
00260 const u8 *pmk_r1_name, int pairwise)
00261 {
00262 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
00263 struct wpa_ft_pmk_r1_sa *r1;
00264
00265
00266
00267 r1 = os_zalloc(sizeof(*r1));
00268 if (r1 == NULL)
00269 return -1;
00270
00271 os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
00272 os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
00273 os_memcpy(r1->spa, spa, ETH_ALEN);
00274 r1->pairwise = pairwise;
00275
00276 r1->next = cache->pmk_r1;
00277 cache->pmk_r1 = r1;
00278
00279 return 0;
00280 }
00281
00282
00283 static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
00284 const u8 *spa, const u8 *pmk_r1_name,
00285 u8 *pmk_r1, int *pairwise)
00286 {
00287 struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
00288 struct wpa_ft_pmk_r1_sa *r1;
00289
00290 r1 = cache->pmk_r1;
00291 while (r1) {
00292 if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
00293 os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
00294 == 0) {
00295 os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
00296 if (pairwise)
00297 *pairwise = r1->pairwise;
00298 return 0;
00299 }
00300
00301 r1 = r1->next;
00302 }
00303
00304 return -1;
00305 }
00306
00307
00308 static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
00309 const u8 *s1kh_id, const u8 *r0kh_id,
00310 size_t r0kh_id_len, const u8 *pmk_r0_name)
00311 {
00312 struct ft_remote_r0kh *r0kh;
00313 struct ft_r0kh_r1kh_pull_frame frame, f;
00314
00315 r0kh = wpa_auth->conf.r0kh_list;
00316 while (r0kh) {
00317 if (r0kh->id_len == r0kh_id_len &&
00318 os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
00319 break;
00320 r0kh = r0kh->next;
00321 }
00322 if (r0kh == NULL)
00323 return -1;
00324
00325 wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
00326 "address " MACSTR, MAC2STR(r0kh->addr));
00327
00328 os_memset(&frame, 0, sizeof(frame));
00329 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
00330 frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
00331 frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
00332 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
00333
00334
00335
00336 if (os_get_random(f.nonce, sizeof(f.nonce))) {
00337 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
00338 "nonce");
00339 return -1;
00340 }
00341 os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
00342 os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
00343 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
00344
00345 if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
00346 f.nonce, frame.nonce) < 0)
00347 return -1;
00348
00349 wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
00350
00351 return 0;
00352 }
00353
00354
00355 int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
00356 struct wpa_ptk *ptk, size_t ptk_len)
00357 {
00358 u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
00359 u8 pmk_r1[PMK_LEN];
00360 u8 ptk_name[WPA_PMK_NAME_LEN];
00361 const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
00362 const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
00363 size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
00364 const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
00365 const u8 *ssid = sm->wpa_auth->conf.ssid;
00366 size_t ssid_len = sm->wpa_auth->conf.ssid_len;
00367
00368
00369 if (sm->xxkey_len == 0) {
00370 wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
00371 "derivation");
00372 return -1;
00373 }
00374
00375 wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
00376 r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
00377 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
00378 wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
00379 wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
00380 sm->pairwise);
00381
00382 wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
00383 pmk_r1, sm->pmk_r1_name);
00384 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
00385 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
00386 WPA_PMK_NAME_LEN);
00387 wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
00388 sm->pairwise);
00389
00390 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
00391 sm->wpa_auth->addr, sm->pmk_r1_name,
00392 (u8 *) ptk, ptk_len, ptk_name);
00393 wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
00394 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
00395
00396 return 0;
00397 }
00398
00399
00400 static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
00401 const u8 *addr, int idx, u8 *seq)
00402 {
00403 if (wpa_auth->cb.get_seqnum == NULL)
00404 return -1;
00405 return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
00406 }
00407
00408
00409 static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
00410 {
00411 u8 *subelem;
00412 struct wpa_group *gsm = sm->group;
00413 size_t subelem_len, pad_len;
00414 const u8 *key;
00415 size_t key_len;
00416 u8 keybuf[32];
00417
00418 key_len = gsm->GTK_len;
00419 if (key_len > sizeof(keybuf))
00420 return NULL;
00421
00422
00423
00424
00425
00426 pad_len = key_len % 8;
00427 if (pad_len)
00428 pad_len = 8 - pad_len;
00429 if (key_len + pad_len < 16)
00430 pad_len += 8;
00431 if (pad_len) {
00432 os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
00433 os_memset(keybuf + key_len, 0, pad_len);
00434 keybuf[key_len] = 0xdd;
00435 key_len += pad_len;
00436 key = keybuf;
00437 } else
00438 key = gsm->GTK[gsm->GN - 1];
00439
00440
00441
00442
00443
00444 subelem_len = 13 + key_len + 8;
00445 subelem = os_zalloc(subelem_len);
00446 if (subelem == NULL)
00447 return NULL;
00448
00449 subelem[0] = FTIE_SUBELEM_GTK;
00450 subelem[1] = 11 + key_len + 8;
00451
00452 WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
00453 subelem[4] = gsm->GTK_len;
00454 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
00455 if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
00456 os_free(subelem);
00457 return NULL;
00458 }
00459
00460 *len = subelem_len;
00461 return subelem;
00462 }
00463
00464
00465 #ifdef CONFIG_IEEE80211W
00466 static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
00467 {
00468 u8 *subelem, *pos;
00469 struct wpa_group *gsm = sm->group;
00470 size_t subelem_len;
00471
00472
00473
00474 subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
00475 subelem = os_zalloc(subelem_len);
00476 if (subelem == NULL)
00477 return NULL;
00478
00479 pos = subelem;
00480 *pos++ = FTIE_SUBELEM_IGTK;
00481 *pos++ = subelem_len - 2;
00482 WPA_PUT_LE16(pos, gsm->GN_igtk);
00483 pos += 2;
00484 wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
00485 pos += 6;
00486 *pos++ = WPA_IGTK_LEN;
00487 if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
00488 gsm->IGTK[gsm->GN_igtk - 4], pos)) {
00489 os_free(subelem);
00490 return NULL;
00491 }
00492
00493 *len = subelem_len;
00494 return subelem;
00495 }
00496 #endif
00497
00498
00499 static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
00500 const u8 *ies, size_t ies_len)
00501 {
00502 struct ieee802_11_elems parse;
00503 struct rsn_rdie *rdie;
00504
00505 wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
00506 id, descr_count);
00507 wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
00508 ies, ies_len);
00509
00510 if (end - pos < (int) sizeof(*rdie)) {
00511 wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
00512 return pos;
00513 }
00514
00515 *pos++ = WLAN_EID_RIC_DATA;
00516 *pos++ = sizeof(*rdie);
00517 rdie = (struct rsn_rdie *) pos;
00518 rdie->id = id;
00519 rdie->descr_count = 0;
00520 rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
00521 pos += sizeof(*rdie);
00522
00523 if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
00524 ParseFailed) {
00525 wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
00526 rdie->status_code =
00527 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
00528 return pos;
00529 }
00530
00531 #ifdef NEED_AP_MLME
00532 if (parse.wmm_tspec) {
00533 struct wmm_tspec_element *tspec;
00534 int res;
00535
00536 if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
00537 wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
00538 "(%d)", (int) parse.wmm_tspec_len);
00539 rdie->status_code =
00540 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
00541 return pos;
00542 }
00543 if (end - pos < (int) sizeof(*tspec)) {
00544 wpa_printf(MSG_ERROR, "FT: Not enough room for "
00545 "response TSPEC");
00546 rdie->status_code =
00547 host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
00548 return pos;
00549 }
00550 tspec = (struct wmm_tspec_element *) pos;
00551 os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
00552 res = wmm_process_tspec(tspec);
00553 wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
00554 if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
00555 rdie->status_code =
00556 host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
00557 else if (res == WMM_ADDTS_STATUS_REFUSED)
00558 rdie->status_code =
00559 host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
00560 else {
00561
00562 rdie->descr_count = 1;
00563 pos += sizeof(*tspec);
00564 }
00565 return pos;
00566 }
00567 #endif
00568
00569 wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
00570 rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
00571 return pos;
00572 }
00573
00574
00575 static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
00576 {
00577 const u8 *rpos, *start;
00578 const struct rsn_rdie *rdie;
00579
00580 wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
00581
00582 rpos = ric;
00583 while (rpos + sizeof(*rdie) < ric + ric_len) {
00584 if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
00585 rpos + 2 + rpos[1] > ric + ric_len)
00586 break;
00587 rdie = (const struct rsn_rdie *) (rpos + 2);
00588 rpos += 2 + rpos[1];
00589 start = rpos;
00590
00591 while (rpos + 2 <= ric + ric_len &&
00592 rpos + 2 + rpos[1] <= ric + ric_len) {
00593 if (rpos[0] == WLAN_EID_RIC_DATA)
00594 break;
00595 rpos += 2 + rpos[1];
00596 }
00597 pos = wpa_ft_process_rdie(pos, end, rdie->id,
00598 rdie->descr_count,
00599 start, rpos - start);
00600 }
00601
00602 return pos;
00603 }
00604
00605
00606 u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
00607 size_t max_len, int auth_alg,
00608 const u8 *req_ies, size_t req_ies_len)
00609 {
00610 u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
00611 size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
00612 int res;
00613 struct wpa_auth_config *conf;
00614 struct rsn_ftie *_ftie;
00615 struct wpa_ft_ies parse;
00616 u8 *ric_start;
00617 u8 *anonce, *snonce;
00618
00619 if (sm == NULL)
00620 return pos;
00621
00622 conf = &sm->wpa_auth->conf;
00623
00624 if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
00625 sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
00626 return pos;
00627
00628 end = pos + max_len;
00629
00630 if (auth_alg == WLAN_AUTH_FT) {
00631
00632
00633
00634
00635 res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
00636 if (res < 0)
00637 return pos;
00638 rsnie = pos;
00639 rsnie_len = res;
00640 pos += res;
00641 }
00642
00643
00644 res = wpa_write_mdie(conf, pos, end - pos);
00645 if (res < 0)
00646 return pos;
00647 mdie = pos;
00648 mdie_len = res;
00649 pos += res;
00650
00651
00652 if (auth_alg == WLAN_AUTH_FT) {
00653 subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
00654 r0kh_id = sm->r0kh_id;
00655 r0kh_id_len = sm->r0kh_id_len;
00656 anonce = sm->ANonce;
00657 snonce = sm->SNonce;
00658 #ifdef CONFIG_IEEE80211W
00659 if (sm->mgmt_frame_prot) {
00660 u8 *igtk;
00661 size_t igtk_len;
00662 u8 *nbuf;
00663 igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
00664 if (igtk == NULL) {
00665 os_free(subelem);
00666 return pos;
00667 }
00668 nbuf = os_realloc(subelem, subelem_len + igtk_len);
00669 if (nbuf == NULL) {
00670 os_free(subelem);
00671 os_free(igtk);
00672 return pos;
00673 }
00674 subelem = nbuf;
00675 os_memcpy(subelem + subelem_len, igtk, igtk_len);
00676 subelem_len += igtk_len;
00677 os_free(igtk);
00678 }
00679 #endif
00680 } else {
00681 r0kh_id = conf->r0_key_holder;
00682 r0kh_id_len = conf->r0_key_holder_len;
00683 anonce = NULL;
00684 snonce = NULL;
00685 }
00686 res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
00687 end - pos, subelem, subelem_len);
00688 os_free(subelem);
00689 if (res < 0)
00690 return pos;
00691 ftie = pos;
00692 ftie_len = res;
00693 pos += res;
00694
00695 os_free(sm->assoc_resp_ftie);
00696 sm->assoc_resp_ftie = os_malloc(ftie_len);
00697 if (sm->assoc_resp_ftie)
00698 os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
00699
00700 _ftie = (struct rsn_ftie *) (ftie + 2);
00701 if (auth_alg == WLAN_AUTH_FT)
00702 _ftie->mic_control[1] = 3;
00703
00704 ric_start = pos;
00705 if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
00706 pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
00707 if (auth_alg == WLAN_AUTH_FT)
00708 _ftie->mic_control[1] +=
00709 ieee802_11_ie_count(ric_start,
00710 pos - ric_start);
00711 }
00712 if (ric_start == pos)
00713 ric_start = NULL;
00714
00715 if (auth_alg == WLAN_AUTH_FT &&
00716 wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
00717 mdie, mdie_len, ftie, ftie_len,
00718 rsnie, rsnie_len,
00719 ric_start, ric_start ? pos - ric_start : 0,
00720 _ftie->mic) < 0)
00721 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
00722
00723 return pos;
00724 }
00725
00726
00727 static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
00728 struct wpa_ft_ies *parse)
00729 {
00730 const u8 *end, *pos;
00731
00732 parse->ftie = ie;
00733 parse->ftie_len = ie_len;
00734
00735 pos = ie + sizeof(struct rsn_ftie);
00736 end = ie + ie_len;
00737
00738 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
00739 switch (pos[0]) {
00740 case FTIE_SUBELEM_R1KH_ID:
00741 if (pos[1] != FT_R1KH_ID_LEN) {
00742 wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
00743 "length in FTIE: %d", pos[1]);
00744 return -1;
00745 }
00746 parse->r1kh_id = pos + 2;
00747 break;
00748 case FTIE_SUBELEM_GTK:
00749 parse->gtk = pos + 2;
00750 parse->gtk_len = pos[1];
00751 break;
00752 case FTIE_SUBELEM_R0KH_ID:
00753 if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
00754 wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
00755 "length in FTIE: %d", pos[1]);
00756 return -1;
00757 }
00758 parse->r0kh_id = pos + 2;
00759 parse->r0kh_id_len = pos[1];
00760 break;
00761 }
00762
00763 pos += 2 + pos[1];
00764 }
00765
00766 return 0;
00767 }
00768
00769
00770 static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
00771 struct wpa_ft_ies *parse)
00772 {
00773 const u8 *end, *pos;
00774 struct wpa_ie_data data;
00775 int ret;
00776 const struct rsn_ftie *ftie;
00777 int prot_ie_count = 0;
00778
00779 os_memset(parse, 0, sizeof(*parse));
00780 if (ies == NULL)
00781 return 0;
00782
00783 pos = ies;
00784 end = ies + ies_len;
00785 while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
00786 switch (pos[0]) {
00787 case WLAN_EID_RSN:
00788 parse->rsn = pos + 2;
00789 parse->rsn_len = pos[1];
00790 ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
00791 parse->rsn_len + 2,
00792 &data);
00793 if (ret < 0) {
00794 wpa_printf(MSG_DEBUG, "FT: Failed to parse "
00795 "RSN IE: %d", ret);
00796 return -1;
00797 }
00798 if (data.num_pmkid == 1 && data.pmkid)
00799 parse->rsn_pmkid = data.pmkid;
00800 break;
00801 case WLAN_EID_MOBILITY_DOMAIN:
00802 parse->mdie = pos + 2;
00803 parse->mdie_len = pos[1];
00804 break;
00805 case WLAN_EID_FAST_BSS_TRANSITION:
00806 if (pos[1] < sizeof(*ftie))
00807 return -1;
00808 ftie = (const struct rsn_ftie *) (pos + 2);
00809 prot_ie_count = ftie->mic_control[1];
00810 if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
00811 return -1;
00812 break;
00813 case WLAN_EID_RIC_DATA:
00814 if (parse->ric == NULL)
00815 parse->ric = pos;
00816 }
00817
00818 pos += 2 + pos[1];
00819 }
00820
00821 if (prot_ie_count == 0)
00822 return 0;
00823
00824
00825
00826
00827
00828 if (parse->rsn)
00829 prot_ie_count--;
00830 if (parse->mdie)
00831 prot_ie_count--;
00832 if (parse->ftie)
00833 prot_ie_count--;
00834 if (prot_ie_count < 0) {
00835 wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
00836 "the protected IE count");
00837 return -1;
00838 }
00839
00840 if (prot_ie_count == 0 && parse->ric) {
00841 wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
00842 "included in protected IE count");
00843 return -1;
00844 }
00845
00846
00847 pos = parse->ric;
00848 while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
00849 prot_ie_count) {
00850 prot_ie_count--;
00851 pos += 2 + pos[1];
00852 }
00853 parse->ric_len = pos - parse->ric;
00854 if (prot_ie_count) {
00855 wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
00856 "frame", (int) prot_ie_count);
00857 return -1;
00858 }
00859
00860 return 0;
00861 }
00862
00863
00864 static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
00865 int vlan_id,
00866 enum wpa_alg alg, const u8 *addr, int idx,
00867 u8 *key, size_t key_len)
00868 {
00869 if (wpa_auth->cb.set_key == NULL)
00870 return -1;
00871 return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
00872 key, key_len);
00873 }
00874
00875
00876 void wpa_ft_install_ptk(struct wpa_state_machine *sm)
00877 {
00878 enum wpa_alg alg;
00879 int klen;
00880
00881
00882 if (sm->pairwise == WPA_CIPHER_TKIP) {
00883 alg = WPA_ALG_TKIP;
00884 klen = 32;
00885 } else if (sm->pairwise == WPA_CIPHER_CCMP) {
00886 alg = WPA_ALG_CCMP;
00887 klen = 16;
00888 } else {
00889 wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
00890 "PTK configuration", sm->pairwise);
00891 return;
00892 }
00893
00894
00895
00896
00897
00898
00899
00900 if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
00901 sm->PTK.tk1, klen))
00902 return;
00903
00904
00905 sm->pairwise_set = TRUE;
00906 }
00907
00908
00909 static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
00910 const u8 *ies, size_t ies_len,
00911 u8 **resp_ies, size_t *resp_ies_len)
00912 {
00913 struct rsn_mdie *mdie;
00914 struct rsn_ftie *ftie;
00915 u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
00916 u8 ptk_name[WPA_PMK_NAME_LEN];
00917 struct wpa_auth_config *conf;
00918 struct wpa_ft_ies parse;
00919 size_t buflen, ptk_len;
00920 int ret;
00921 u8 *pos, *end;
00922 int pairwise;
00923
00924 *resp_ies = NULL;
00925 *resp_ies_len = 0;
00926
00927 sm->pmk_r1_name_valid = 0;
00928 conf = &sm->wpa_auth->conf;
00929
00930 wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
00931 ies, ies_len);
00932
00933 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
00934 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
00935 return WLAN_STATUS_UNSPECIFIED_FAILURE;
00936 }
00937
00938 mdie = (struct rsn_mdie *) parse.mdie;
00939 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
00940 os_memcmp(mdie->mobility_domain,
00941 sm->wpa_auth->conf.mobility_domain,
00942 MOBILITY_DOMAIN_ID_LEN) != 0) {
00943 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
00944 return WLAN_STATUS_INVALID_MDIE;
00945 }
00946
00947 ftie = (struct rsn_ftie *) parse.ftie;
00948 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
00949 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
00950 return WLAN_STATUS_INVALID_FTIE;
00951 }
00952
00953 os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
00954
00955 if (parse.r0kh_id == NULL) {
00956 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
00957 return WLAN_STATUS_INVALID_FTIE;
00958 }
00959
00960 wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
00961 parse.r0kh_id, parse.r0kh_id_len);
00962 os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
00963 sm->r0kh_id_len = parse.r0kh_id_len;
00964
00965 if (parse.rsn_pmkid == NULL) {
00966 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
00967 return WLAN_STATUS_INVALID_PMKID;
00968 }
00969
00970 wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
00971 parse.rsn_pmkid, WPA_PMK_NAME_LEN);
00972 wpa_derive_pmk_r1_name(parse.rsn_pmkid,
00973 sm->wpa_auth->conf.r1_key_holder, sm->addr,
00974 pmk_r1_name);
00975 wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
00976 pmk_r1_name, WPA_PMK_NAME_LEN);
00977
00978 if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
00979 &pairwise) < 0) {
00980 if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
00981 sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
00982 wpa_printf(MSG_DEBUG, "FT: Did not have matching "
00983 "PMK-R1 and unknown R0KH-ID");
00984 return WLAN_STATUS_INVALID_PMKID;
00985 }
00986
00987
00988
00989
00990
00991
00992 return WLAN_STATUS_INVALID_PMKID;
00993 }
00994
00995 wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
00996 sm->pmk_r1_name_valid = 1;
00997 os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
00998
00999 if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
01000 wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
01001 "ANonce");
01002 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01003 }
01004
01005 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
01006 sm->SNonce, WPA_NONCE_LEN);
01007 wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
01008 sm->ANonce, WPA_NONCE_LEN);
01009
01010 ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
01011 wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
01012 sm->wpa_auth->addr, pmk_r1_name,
01013 (u8 *) &sm->PTK, ptk_len, ptk_name);
01014 wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
01015 (u8 *) &sm->PTK, ptk_len);
01016 wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
01017
01018 sm->pairwise = pairwise;
01019 wpa_ft_install_ptk(sm);
01020
01021 buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
01022 2 + FT_R1KH_ID_LEN + 200;
01023 *resp_ies = os_zalloc(buflen);
01024 if (*resp_ies == NULL) {
01025 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01026 }
01027
01028 pos = *resp_ies;
01029 end = *resp_ies + buflen;
01030
01031 ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
01032 if (ret < 0) {
01033 os_free(*resp_ies);
01034 *resp_ies = NULL;
01035 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01036 }
01037 pos += ret;
01038
01039 ret = wpa_write_mdie(conf, pos, end - pos);
01040 if (ret < 0) {
01041 os_free(*resp_ies);
01042 *resp_ies = NULL;
01043 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01044 }
01045 pos += ret;
01046
01047 ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
01048 sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
01049 if (ret < 0) {
01050 os_free(*resp_ies);
01051 *resp_ies = NULL;
01052 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01053 }
01054 pos += ret;
01055
01056 *resp_ies_len = pos - *resp_ies;
01057
01058 return WLAN_STATUS_SUCCESS;
01059 }
01060
01061
01062 void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
01063 u16 auth_transaction, const u8 *ies, size_t ies_len,
01064 void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
01065 u16 auth_transaction, u16 status,
01066 const u8 *ies, size_t ies_len),
01067 void *ctx)
01068 {
01069 u16 status;
01070 u8 *resp_ies;
01071 size_t resp_ies_len;
01072
01073 if (sm == NULL) {
01074 wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
01075 "WPA SM not available");
01076 return;
01077 }
01078
01079 wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
01080 " BSSID=" MACSTR " transaction=%d",
01081 MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
01082 status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
01083 &resp_ies_len);
01084
01085 wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
01086 " auth_transaction=%d status=%d",
01087 MAC2STR(sm->addr), auth_transaction + 1, status);
01088 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
01089 cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
01090 resp_ies, resp_ies_len);
01091 os_free(resp_ies);
01092 }
01093
01094
01095 u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
01096 size_t ies_len)
01097 {
01098 struct wpa_ft_ies parse;
01099 struct rsn_mdie *mdie;
01100 struct rsn_ftie *ftie;
01101 u8 mic[16];
01102 unsigned int count;
01103
01104 if (sm == NULL)
01105 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01106
01107 wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
01108
01109 if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
01110 wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
01111 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01112 }
01113
01114 if (parse.rsn == NULL) {
01115 wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
01116 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01117 }
01118
01119 if (parse.rsn_pmkid == NULL) {
01120 wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
01121 return WLAN_STATUS_INVALID_PMKID;
01122 }
01123
01124 if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
01125 {
01126 wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
01127 "with the PMKR1Name derived from auth request");
01128 return WLAN_STATUS_INVALID_PMKID;
01129 }
01130
01131 mdie = (struct rsn_mdie *) parse.mdie;
01132 if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
01133 os_memcmp(mdie->mobility_domain,
01134 sm->wpa_auth->conf.mobility_domain,
01135 MOBILITY_DOMAIN_ID_LEN) != 0) {
01136 wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
01137 return WLAN_STATUS_INVALID_MDIE;
01138 }
01139
01140 ftie = (struct rsn_ftie *) parse.ftie;
01141 if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
01142 wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
01143 return WLAN_STATUS_INVALID_FTIE;
01144 }
01145
01146 if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
01147 wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
01148 wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
01149 ftie->snonce, WPA_NONCE_LEN);
01150 wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
01151 sm->SNonce, WPA_NONCE_LEN);
01152 return -1;
01153 }
01154
01155 if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
01156 wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
01157 wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
01158 ftie->anonce, WPA_NONCE_LEN);
01159 wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
01160 sm->ANonce, WPA_NONCE_LEN);
01161 return -1;
01162 }
01163
01164
01165 if (parse.r0kh_id == NULL) {
01166 wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
01167 return -1;
01168 }
01169
01170 if (parse.r0kh_id_len != sm->r0kh_id_len ||
01171 os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
01172 wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
01173 "the current R0KH-ID");
01174 wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
01175 parse.r0kh_id, parse.r0kh_id_len);
01176 wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
01177 sm->r0kh_id, sm->r0kh_id_len);
01178 return -1;
01179 }
01180
01181 if (parse.r1kh_id == NULL) {
01182 wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
01183 return -1;
01184 }
01185
01186 if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
01187 FT_R1KH_ID_LEN) != 0) {
01188 wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
01189 "ReassocReq");
01190 wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
01191 parse.r1kh_id, FT_R1KH_ID_LEN);
01192 wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
01193 sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
01194 return -1;
01195 }
01196
01197 if (parse.rsn_pmkid == NULL ||
01198 os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
01199 wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
01200 "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
01201 return -1;
01202 }
01203
01204 count = 3;
01205 if (parse.ric)
01206 count++;
01207 if (ftie->mic_control[1] != count) {
01208 wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
01209 "Control: received %u expected %u",
01210 ftie->mic_control[1], count);
01211 return -1;
01212 }
01213
01214 if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
01215 parse.mdie - 2, parse.mdie_len + 2,
01216 parse.ftie - 2, parse.ftie_len + 2,
01217 parse.rsn - 2, parse.rsn_len + 2,
01218 parse.ric, parse.ric_len,
01219 mic) < 0) {
01220 wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
01221 return WLAN_STATUS_UNSPECIFIED_FAILURE;
01222 }
01223
01224 if (os_memcmp(mic, ftie->mic, 16) != 0) {
01225 wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
01226 wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
01227 wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
01228 return WLAN_STATUS_INVALID_FTIE;
01229 }
01230
01231 return WLAN_STATUS_SUCCESS;
01232 }
01233
01234
01235 int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
01236 {
01237 const u8 *sta_addr, *target_ap;
01238 const u8 *ies;
01239 size_t ies_len;
01240 u8 action;
01241 struct ft_rrb_frame *frame;
01242
01243 if (sm == NULL)
01244 return -1;
01245
01246
01247
01248
01249
01250
01251 if (len < 14) {
01252 wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
01253 "(len=%lu)", (unsigned long) len);
01254 return -1;
01255 }
01256
01257 action = data[1];
01258 sta_addr = data + 2;
01259 target_ap = data + 8;
01260 ies = data + 14;
01261 ies_len = len - 14;
01262
01263 wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
01264 " Target AP=" MACSTR " Action=%d)",
01265 MAC2STR(sta_addr), MAC2STR(target_ap), action);
01266
01267 if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
01268 wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
01269 "STA=" MACSTR " STA-Address=" MACSTR,
01270 MAC2STR(sm->addr), MAC2STR(sta_addr));
01271 return -1;
01272 }
01273
01274
01275
01276
01277
01278
01279 if ((target_ap[0] & 0x01) ||
01280 os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
01281 wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
01282 "frame");
01283 return -1;
01284 }
01285
01286 wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
01287
01288
01289 frame = os_malloc(sizeof(*frame) + len);
01290 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
01291 frame->packet_type = FT_PACKET_REQUEST;
01292 frame->action_length = host_to_le16(len);
01293 os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
01294 os_memcpy(frame + 1, data, len);
01295
01296 wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
01297 sizeof(*frame) + len);
01298 os_free(frame);
01299
01300 return 0;
01301 }
01302
01303
01304 static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
01305 const u8 *current_ap, const u8 *sta_addr,
01306 const u8 *body, size_t len)
01307 {
01308 struct wpa_state_machine *sm;
01309 u16 status;
01310 u8 *resp_ies, *pos;
01311 size_t resp_ies_len, rlen;
01312 struct ft_rrb_frame *frame;
01313
01314 sm = wpa_ft_add_sta(wpa_auth, sta_addr);
01315 if (sm == NULL) {
01316 wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
01317 "RRB Request");
01318 return -1;
01319 }
01320
01321 wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
01322
01323 status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
01324 &resp_ies_len);
01325
01326 wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
01327 " CurrentAP=" MACSTR " status=%d",
01328 MAC2STR(sm->addr), MAC2STR(current_ap), status);
01329 wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
01330
01331
01332
01333
01334
01335
01336
01337 rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
01338
01339 frame = os_malloc(sizeof(*frame) + rlen);
01340 frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
01341 frame->packet_type = FT_PACKET_RESPONSE;
01342 frame->action_length = host_to_le16(rlen);
01343 os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
01344 pos = (u8 *) (frame + 1);
01345 *pos++ = WLAN_ACTION_FT;
01346 *pos++ = 2;
01347 os_memcpy(pos, sta_addr, ETH_ALEN);
01348 pos += ETH_ALEN;
01349 os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
01350 pos += ETH_ALEN;
01351 WPA_PUT_LE16(pos, status);
01352 pos += 2;
01353 if (resp_ies) {
01354 os_memcpy(pos, resp_ies, resp_ies_len);
01355 os_free(resp_ies);
01356 }
01357
01358 wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
01359 sizeof(*frame) + rlen);
01360 os_free(frame);
01361
01362 return 0;
01363 }
01364
01365
01366 static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
01367 const u8 *src_addr,
01368 const u8 *data, size_t data_len)
01369 {
01370 struct ft_r0kh_r1kh_pull_frame *frame, f;
01371 struct ft_remote_r1kh *r1kh;
01372 struct ft_r0kh_r1kh_resp_frame resp, r;
01373 u8 pmk_r0[PMK_LEN];
01374 int pairwise;
01375
01376 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
01377
01378 if (data_len < sizeof(*frame))
01379 return -1;
01380
01381 r1kh = wpa_auth->conf.r1kh_list;
01382 while (r1kh) {
01383 if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
01384 break;
01385 r1kh = r1kh->next;
01386 }
01387 if (r1kh == NULL) {
01388 wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
01389 "PMK-R1 pull source address " MACSTR,
01390 MAC2STR(src_addr));
01391 return -1;
01392 }
01393
01394 frame = (struct ft_r0kh_r1kh_pull_frame *) data;
01395
01396
01397 if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
01398 frame->nonce, f.nonce) < 0) {
01399 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
01400 "request from " MACSTR, MAC2STR(src_addr));
01401 return -1;
01402 }
01403
01404 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
01405 f.nonce, sizeof(f.nonce));
01406 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
01407 f.pmk_r0_name, WPA_PMK_NAME_LEN);
01408 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
01409 MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
01410
01411 os_memset(&resp, 0, sizeof(resp));
01412 resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
01413 resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
01414 resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
01415 os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
01416
01417
01418
01419 os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
01420 os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
01421 os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
01422 if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
01423 &pairwise) < 0) {
01424 wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
01425 "PMK-R1 pull");
01426 return -1;
01427 }
01428
01429 wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
01430 r.pmk_r1, r.pmk_r1_name);
01431 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
01432 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
01433 WPA_PMK_NAME_LEN);
01434 r.pairwise = pairwise;
01435
01436 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
01437 r.nonce, resp.nonce) < 0) {
01438 os_memset(pmk_r0, 0, PMK_LEN);
01439 return -1;
01440 }
01441
01442 os_memset(pmk_r0, 0, PMK_LEN);
01443
01444 wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
01445
01446 return 0;
01447 }
01448
01449
01450 static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
01451 const u8 *src_addr,
01452 const u8 *data, size_t data_len)
01453 {
01454 struct ft_r0kh_r1kh_resp_frame *frame, f;
01455 struct ft_remote_r0kh *r0kh;
01456 int pairwise;
01457
01458 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
01459
01460 if (data_len < sizeof(*frame))
01461 return -1;
01462
01463 r0kh = wpa_auth->conf.r0kh_list;
01464 while (r0kh) {
01465 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
01466 break;
01467 r0kh = r0kh->next;
01468 }
01469 if (r0kh == NULL) {
01470 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
01471 "PMK-R0 pull response source address " MACSTR,
01472 MAC2STR(src_addr));
01473 return -1;
01474 }
01475
01476 frame = (struct ft_r0kh_r1kh_resp_frame *) data;
01477
01478
01479 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
01480 frame->nonce, f.nonce) < 0) {
01481 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
01482 "response from " MACSTR, MAC2STR(src_addr));
01483 return -1;
01484 }
01485
01486 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
01487 != 0) {
01488 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
01489 "matching R1KH-ID");
01490 return -1;
01491 }
01492
01493
01494
01495
01496
01497 pairwise = le_to_host16(f.pairwise);
01498 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
01499 f.nonce, sizeof(f.nonce));
01500 wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
01501 MACSTR " pairwise=0x%x",
01502 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
01503 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
01504 f.pmk_r1, PMK_LEN);
01505 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
01506 f.pmk_r1_name, WPA_PMK_NAME_LEN);
01507
01508 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
01509 pairwise);
01510 os_memset(f.pmk_r1, 0, PMK_LEN);
01511
01512 return 0;
01513 }
01514
01515
01516 static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
01517 const u8 *src_addr,
01518 const u8 *data, size_t data_len)
01519 {
01520 struct ft_r0kh_r1kh_push_frame *frame, f;
01521 struct ft_remote_r0kh *r0kh;
01522 struct os_time now;
01523 os_time_t tsend;
01524 int pairwise;
01525
01526 wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
01527
01528 if (data_len < sizeof(*frame))
01529 return -1;
01530
01531 r0kh = wpa_auth->conf.r0kh_list;
01532 while (r0kh) {
01533 if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
01534 break;
01535 r0kh = r0kh->next;
01536 }
01537 if (r0kh == NULL) {
01538 wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
01539 "PMK-R0 push source address " MACSTR,
01540 MAC2STR(src_addr));
01541 return -1;
01542 }
01543
01544 frame = (struct ft_r0kh_r1kh_push_frame *) data;
01545
01546
01547 if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
01548 frame->timestamp, f.timestamp) < 0) {
01549 wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
01550 MACSTR, MAC2STR(src_addr));
01551 return -1;
01552 }
01553
01554 os_get_time(&now);
01555 tsend = WPA_GET_LE32(f.timestamp);
01556 if ((now.sec > tsend && now.sec - tsend > 60) ||
01557 (now.sec < tsend && tsend - now.sec > 60)) {
01558 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
01559 "timestamp: sender time %d own time %d\n",
01560 (int) tsend, (int) now.sec);
01561 return -1;
01562 }
01563
01564 if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
01565 != 0) {
01566 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
01567 "R1KH-ID (received " MACSTR " own " MACSTR ")",
01568 MAC2STR(f.r1kh_id),
01569 MAC2STR(wpa_auth->conf.r1_key_holder));
01570 return -1;
01571 }
01572
01573 pairwise = le_to_host16(f.pairwise);
01574 wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
01575 MACSTR " pairwise=0x%x",
01576 MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
01577 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
01578 f.pmk_r1, PMK_LEN);
01579 wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
01580 f.pmk_r1_name, WPA_PMK_NAME_LEN);
01581
01582 wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
01583 pairwise);
01584 os_memset(f.pmk_r1, 0, PMK_LEN);
01585
01586 return 0;
01587 }
01588
01589
01590 int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
01591 const u8 *data, size_t data_len)
01592 {
01593 struct ft_rrb_frame *frame;
01594 u16 alen;
01595 const u8 *pos, *end, *start;
01596 u8 action;
01597 const u8 *sta_addr, *target_ap_addr;
01598
01599 wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
01600 MAC2STR(src_addr));
01601
01602 if (data_len < sizeof(*frame)) {
01603 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
01604 (unsigned long) data_len);
01605 return -1;
01606 }
01607
01608 pos = data;
01609 frame = (struct ft_rrb_frame *) pos;
01610 pos += sizeof(*frame);
01611
01612 alen = le_to_host16(frame->action_length);
01613 wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
01614 "action_length=%d ap_address=" MACSTR,
01615 frame->frame_type, frame->packet_type, alen,
01616 MAC2STR(frame->ap_address));
01617
01618 if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
01619
01620 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
01621 "unrecognized type %d", frame->frame_type);
01622 return -1;
01623 }
01624
01625 if (alen > data_len - sizeof(*frame)) {
01626 wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
01627 "frame");
01628 return -1;
01629 }
01630
01631 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
01632 return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
01633 if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
01634 return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
01635 if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
01636 return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
01637
01638 wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
01639
01640 if (alen < 1 + 1 + 2 * ETH_ALEN) {
01641 wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
01642 "room for Action Frame body); alen=%lu",
01643 (unsigned long) alen);
01644 return -1;
01645 }
01646 start = pos;
01647 end = pos + alen;
01648
01649 if (*pos != WLAN_ACTION_FT) {
01650 wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
01651 "%d", *pos);
01652 return -1;
01653 }
01654
01655 pos++;
01656 action = *pos++;
01657 sta_addr = pos;
01658 pos += ETH_ALEN;
01659 target_ap_addr = pos;
01660 pos += ETH_ALEN;
01661 wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
01662 MACSTR " target_ap_addr=" MACSTR,
01663 action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
01664
01665 if (frame->packet_type == FT_PACKET_REQUEST) {
01666 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
01667
01668 if (action != 1) {
01669 wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
01670 "RRB Request", action);
01671 return -1;
01672 }
01673
01674 if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
01675 wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
01676 "RRB Request does not match with own "
01677 "address");
01678 return -1;
01679 }
01680
01681 if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
01682 sta_addr, pos, end - pos) < 0)
01683 return -1;
01684 } else if (frame->packet_type == FT_PACKET_RESPONSE) {
01685 u16 status_code;
01686
01687 if (end - pos < 2) {
01688 wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
01689 "code in RRB Response");
01690 return -1;
01691 }
01692 status_code = WPA_GET_LE16(pos);
01693 pos += 2;
01694
01695 wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
01696 "(status_code=%d)", status_code);
01697
01698 if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
01699 return -1;
01700 } else {
01701 wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
01702 "packet_type %d", frame->packet_type);
01703 return -1;
01704 }
01705
01706 return 0;
01707 }
01708
01709
01710 static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
01711 struct wpa_ft_pmk_r0_sa *pmk_r0,
01712 struct ft_remote_r1kh *r1kh,
01713 const u8 *s1kh_id, int pairwise)
01714 {
01715 struct ft_r0kh_r1kh_push_frame frame, f;
01716 struct os_time now;
01717
01718 os_memset(&frame, 0, sizeof(frame));
01719 frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
01720 frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
01721 frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
01722 os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
01723
01724
01725
01726 os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
01727 os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
01728 os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
01729 wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
01730 s1kh_id, f.pmk_r1, f.pmk_r1_name);
01731 wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
01732 wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
01733 wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
01734 WPA_PMK_NAME_LEN);
01735 os_get_time(&now);
01736 WPA_PUT_LE32(f.timestamp, now.sec);
01737 f.pairwise = pairwise;
01738 if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
01739 f.timestamp, frame.timestamp) < 0)
01740 return;
01741
01742 wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
01743 }
01744
01745
01746 void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
01747 {
01748 struct wpa_ft_pmk_r0_sa *r0;
01749 struct ft_remote_r1kh *r1kh;
01750
01751 if (!wpa_auth->conf.pmk_r1_push)
01752 return;
01753
01754 r0 = wpa_auth->ft_pmk_cache->pmk_r0;
01755 while (r0) {
01756 if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
01757 break;
01758 r0 = r0->next;
01759 }
01760
01761 if (r0 == NULL || r0->pmk_r1_pushed)
01762 return;
01763 r0->pmk_r1_pushed = 1;
01764
01765 wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
01766 "for STA " MACSTR, MAC2STR(addr));
01767
01768 r1kh = wpa_auth->conf.r1kh_list;
01769 while (r1kh) {
01770 wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
01771 r1kh = r1kh->next;
01772 }
01773 }
01774
01775 #endif