+++ /dev/null
-/*
- * hostapd - IEEE 802.11r - Fast BSS Transition
- * Copyright (c) 2004-2009, Jouni Malinen <j@w1.fi>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Alternatively, this software may be distributed under the terms of BSD
- * license.
- *
- * See README and COPYING for more details.
- */
-
-#include "utils/includes.h"
-
-#include "utils/common.h"
-#include "common/ieee802_11_defs.h"
-#include "common/ieee802_11_common.h"
-#include "crypto/aes_wrap.h"
-#include "ap_config.h"
-#include "ieee802_11.h"
-#include "wmm.h"
-#include "wpa_auth.h"
-#include "wpa_auth_i.h"
-#include "wpa_auth_ie.h"
-
-
-#ifdef CONFIG_IEEE80211R
-
-struct wpa_ft_ies {
- const u8 *mdie;
- size_t mdie_len;
- const u8 *ftie;
- size_t ftie_len;
- const u8 *r1kh_id;
- const u8 *gtk;
- size_t gtk_len;
- const u8 *r0kh_id;
- size_t r0kh_id_len;
- const u8 *rsn;
- size_t rsn_len;
- const u8 *rsn_pmkid;
- const u8 *ric;
- size_t ric_len;
-};
-
-
-static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
- struct wpa_ft_ies *parse);
-
-
-static int wpa_ft_rrb_send(struct wpa_authenticator *wpa_auth, const u8 *dst,
- const u8 *data, size_t data_len)
-{
- if (wpa_auth->cb.send_ether == NULL)
- return -1;
- wpa_printf(MSG_DEBUG, "FT: RRB send to " MACSTR, MAC2STR(dst));
- return wpa_auth->cb.send_ether(wpa_auth->cb.ctx, dst, ETH_P_RRB,
- data, data_len);
-}
-
-
-static int wpa_ft_action_send(struct wpa_authenticator *wpa_auth,
- const u8 *dst, const u8 *data, size_t data_len)
-{
- if (wpa_auth->cb.send_ft_action == NULL)
- return -1;
- return wpa_auth->cb.send_ft_action(wpa_auth->cb.ctx, dst,
- data, data_len);
-}
-
-
-static struct wpa_state_machine *
-wpa_ft_add_sta(struct wpa_authenticator *wpa_auth, const u8 *sta_addr)
-{
- if (wpa_auth->cb.add_sta == NULL)
- return NULL;
- return wpa_auth->cb.add_sta(wpa_auth->cb.ctx, sta_addr);
-}
-
-
-int wpa_write_mdie(struct wpa_auth_config *conf, u8 *buf, size_t len)
-{
- u8 *pos = buf;
- u8 capab;
- if (len < 2 + sizeof(struct rsn_mdie))
- return -1;
-
- *pos++ = WLAN_EID_MOBILITY_DOMAIN;
- *pos++ = MOBILITY_DOMAIN_ID_LEN + 1;
- os_memcpy(pos, conf->mobility_domain, MOBILITY_DOMAIN_ID_LEN);
- pos += MOBILITY_DOMAIN_ID_LEN;
- capab = RSN_FT_CAPAB_FT_OVER_DS;
- *pos++ = capab;
-
- return pos - buf;
-}
-
-
-int wpa_write_ftie(struct wpa_auth_config *conf, const u8 *r0kh_id,
- size_t r0kh_id_len,
- const u8 *anonce, const u8 *snonce,
- u8 *buf, size_t len, const u8 *subelem,
- size_t subelem_len)
-{
- u8 *pos = buf, *ielen;
- struct rsn_ftie *hdr;
-
- if (len < 2 + sizeof(*hdr) + 2 + FT_R1KH_ID_LEN + 2 + r0kh_id_len +
- subelem_len)
- return -1;
-
- *pos++ = WLAN_EID_FAST_BSS_TRANSITION;
- ielen = pos++;
-
- hdr = (struct rsn_ftie *) pos;
- os_memset(hdr, 0, sizeof(*hdr));
- pos += sizeof(*hdr);
- WPA_PUT_LE16(hdr->mic_control, 0);
- if (anonce)
- os_memcpy(hdr->anonce, anonce, WPA_NONCE_LEN);
- if (snonce)
- os_memcpy(hdr->snonce, snonce, WPA_NONCE_LEN);
-
- /* Optional Parameters */
- *pos++ = FTIE_SUBELEM_R1KH_ID;
- *pos++ = FT_R1KH_ID_LEN;
- os_memcpy(pos, conf->r1_key_holder, FT_R1KH_ID_LEN);
- pos += FT_R1KH_ID_LEN;
-
- if (r0kh_id) {
- *pos++ = FTIE_SUBELEM_R0KH_ID;
- *pos++ = r0kh_id_len;
- os_memcpy(pos, r0kh_id, r0kh_id_len);
- pos += r0kh_id_len;
- }
-
- if (subelem) {
- os_memcpy(pos, subelem, subelem_len);
- pos += subelem_len;
- }
-
- *ielen = pos - buf - 2;
-
- return pos - buf;
-}
-
-
-struct wpa_ft_pmk_r0_sa {
- struct wpa_ft_pmk_r0_sa *next;
- u8 pmk_r0[PMK_LEN];
- u8 pmk_r0_name[WPA_PMK_NAME_LEN];
- u8 spa[ETH_ALEN];
- int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
- /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
- int pmk_r1_pushed;
-};
-
-struct wpa_ft_pmk_r1_sa {
- struct wpa_ft_pmk_r1_sa *next;
- u8 pmk_r1[PMK_LEN];
- u8 pmk_r1_name[WPA_PMK_NAME_LEN];
- u8 spa[ETH_ALEN];
- int pairwise; /* Pairwise cipher suite, WPA_CIPHER_* */
- /* TODO: expiration, identity, radius_class, EAP type, VLAN ID */
-};
-
-struct wpa_ft_pmk_cache {
- struct wpa_ft_pmk_r0_sa *pmk_r0;
- struct wpa_ft_pmk_r1_sa *pmk_r1;
-};
-
-struct wpa_ft_pmk_cache * wpa_ft_pmk_cache_init(void)
-{
- struct wpa_ft_pmk_cache *cache;
-
- cache = os_zalloc(sizeof(*cache));
-
- return cache;
-}
-
-
-void wpa_ft_pmk_cache_deinit(struct wpa_ft_pmk_cache *cache)
-{
- struct wpa_ft_pmk_r0_sa *r0, *r0prev;
- struct wpa_ft_pmk_r1_sa *r1, *r1prev;
-
- r0 = cache->pmk_r0;
- while (r0) {
- r0prev = r0;
- r0 = r0->next;
- os_memset(r0prev->pmk_r0, 0, PMK_LEN);
- os_free(r0prev);
- }
-
- r1 = cache->pmk_r1;
- while (r1) {
- r1prev = r1;
- r1 = r1->next;
- os_memset(r1prev->pmk_r1, 0, PMK_LEN);
- os_free(r1prev);
- }
-
- os_free(cache);
-}
-
-
-static int wpa_ft_store_pmk_r0(struct wpa_authenticator *wpa_auth,
- const u8 *spa, const u8 *pmk_r0,
- const u8 *pmk_r0_name, int pairwise)
-{
- struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
- struct wpa_ft_pmk_r0_sa *r0;
-
- /* TODO: add expiration and limit on number of entries in cache */
-
- r0 = os_zalloc(sizeof(*r0));
- if (r0 == NULL)
- return -1;
-
- os_memcpy(r0->pmk_r0, pmk_r0, PMK_LEN);
- os_memcpy(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
- os_memcpy(r0->spa, spa, ETH_ALEN);
- r0->pairwise = pairwise;
-
- r0->next = cache->pmk_r0;
- cache->pmk_r0 = r0;
-
- return 0;
-}
-
-
-static int wpa_ft_fetch_pmk_r0(struct wpa_authenticator *wpa_auth,
- const u8 *spa, const u8 *pmk_r0_name,
- u8 *pmk_r0, int *pairwise)
-{
- struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
- struct wpa_ft_pmk_r0_sa *r0;
-
- r0 = cache->pmk_r0;
- while (r0) {
- if (os_memcmp(r0->spa, spa, ETH_ALEN) == 0 &&
- os_memcmp(r0->pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN)
- == 0) {
- os_memcpy(pmk_r0, r0->pmk_r0, PMK_LEN);
- if (pairwise)
- *pairwise = r0->pairwise;
- return 0;
- }
-
- r0 = r0->next;
- }
-
- return -1;
-}
-
-
-static int wpa_ft_store_pmk_r1(struct wpa_authenticator *wpa_auth,
- const u8 *spa, const u8 *pmk_r1,
- const u8 *pmk_r1_name, int pairwise)
-{
- struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
- struct wpa_ft_pmk_r1_sa *r1;
-
- /* TODO: add expiration and limit on number of entries in cache */
-
- r1 = os_zalloc(sizeof(*r1));
- if (r1 == NULL)
- return -1;
-
- os_memcpy(r1->pmk_r1, pmk_r1, PMK_LEN);
- os_memcpy(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
- os_memcpy(r1->spa, spa, ETH_ALEN);
- r1->pairwise = pairwise;
-
- r1->next = cache->pmk_r1;
- cache->pmk_r1 = r1;
-
- return 0;
-}
-
-
-static int wpa_ft_fetch_pmk_r1(struct wpa_authenticator *wpa_auth,
- const u8 *spa, const u8 *pmk_r1_name,
- u8 *pmk_r1, int *pairwise)
-{
- struct wpa_ft_pmk_cache *cache = wpa_auth->ft_pmk_cache;
- struct wpa_ft_pmk_r1_sa *r1;
-
- r1 = cache->pmk_r1;
- while (r1) {
- if (os_memcmp(r1->spa, spa, ETH_ALEN) == 0 &&
- os_memcmp(r1->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN)
- == 0) {
- os_memcpy(pmk_r1, r1->pmk_r1, PMK_LEN);
- if (pairwise)
- *pairwise = r1->pairwise;
- return 0;
- }
-
- r1 = r1->next;
- }
-
- return -1;
-}
-
-
-static int wpa_ft_pull_pmk_r1(struct wpa_authenticator *wpa_auth,
- const u8 *s1kh_id, const u8 *r0kh_id,
- size_t r0kh_id_len, const u8 *pmk_r0_name)
-{
- struct ft_remote_r0kh *r0kh;
- struct ft_r0kh_r1kh_pull_frame frame, f;
-
- r0kh = wpa_auth->conf.r0kh_list;
- while (r0kh) {
- if (r0kh->id_len == r0kh_id_len &&
- os_memcmp(r0kh->id, r0kh_id, r0kh_id_len) == 0)
- break;
- r0kh = r0kh->next;
- }
- if (r0kh == NULL)
- return -1;
-
- wpa_printf(MSG_DEBUG, "FT: Send PMK-R1 pull request to remote R0KH "
- "address " MACSTR, MAC2STR(r0kh->addr));
-
- os_memset(&frame, 0, sizeof(frame));
- frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
- frame.packet_type = FT_PACKET_R0KH_R1KH_PULL;
- frame.data_length = host_to_le16(FT_R0KH_R1KH_PULL_DATA_LEN);
- os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
-
- /* aes_wrap() does not support inplace encryption, so use a temporary
- * buffer for the data. */
- if (os_get_random(f.nonce, sizeof(f.nonce))) {
- wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
- "nonce");
- return -1;
- }
- os_memcpy(f.pmk_r0_name, pmk_r0_name, WPA_PMK_NAME_LEN);
- os_memcpy(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
- os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
-
- if (aes_wrap(r0kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
- f.nonce, frame.nonce) < 0)
- return -1;
-
- wpa_ft_rrb_send(wpa_auth, r0kh->addr, (u8 *) &frame, sizeof(frame));
-
- return 0;
-}
-
-
-int wpa_auth_derive_ptk_ft(struct wpa_state_machine *sm, const u8 *pmk,
- struct wpa_ptk *ptk, size_t ptk_len)
-{
- u8 pmk_r0[PMK_LEN], pmk_r0_name[WPA_PMK_NAME_LEN];
- u8 pmk_r1[PMK_LEN];
- u8 ptk_name[WPA_PMK_NAME_LEN];
- const u8 *mdid = sm->wpa_auth->conf.mobility_domain;
- const u8 *r0kh = sm->wpa_auth->conf.r0_key_holder;
- size_t r0kh_len = sm->wpa_auth->conf.r0_key_holder_len;
- const u8 *r1kh = sm->wpa_auth->conf.r1_key_holder;
- const u8 *ssid = sm->wpa_auth->conf.ssid;
- size_t ssid_len = sm->wpa_auth->conf.ssid_len;
-
-
- if (sm->xxkey_len == 0) {
- wpa_printf(MSG_DEBUG, "FT: XXKey not available for key "
- "derivation");
- return -1;
- }
-
- wpa_derive_pmk_r0(sm->xxkey, sm->xxkey_len, ssid, ssid_len, mdid,
- r0kh, r0kh_len, sm->addr, pmk_r0, pmk_r0_name);
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R0", pmk_r0, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMKR0Name", pmk_r0_name, WPA_PMK_NAME_LEN);
- wpa_ft_store_pmk_r0(sm->wpa_auth, sm->addr, pmk_r0, pmk_r0_name,
- sm->pairwise);
-
- wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
- pmk_r1, sm->pmk_r1_name);
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", sm->pmk_r1_name,
- WPA_PMK_NAME_LEN);
- wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, sm->pmk_r1_name,
- sm->pairwise);
-
- wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
- sm->wpa_auth->addr, sm->pmk_r1_name,
- (u8 *) ptk, ptk_len, ptk_name);
- wpa_hexdump_key(MSG_DEBUG, "FT: PTK", (u8 *) ptk, ptk_len);
- wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
-
- return 0;
-}
-
-
-static inline int wpa_auth_get_seqnum(struct wpa_authenticator *wpa_auth,
- const u8 *addr, int idx, u8 *seq)
-{
- if (wpa_auth->cb.get_seqnum == NULL)
- return -1;
- return wpa_auth->cb.get_seqnum(wpa_auth->cb.ctx, addr, idx, seq);
-}
-
-
-static u8 * wpa_ft_gtk_subelem(struct wpa_state_machine *sm, size_t *len)
-{
- u8 *subelem;
- struct wpa_group *gsm = sm->group;
- size_t subelem_len, pad_len;
- const u8 *key;
- size_t key_len;
- u8 keybuf[32];
-
- key_len = gsm->GTK_len;
- if (key_len > sizeof(keybuf))
- return NULL;
-
- /*
- * Pad key for AES Key Wrap if it is not multiple of 8 bytes or is less
- * than 16 bytes.
- */
- pad_len = key_len % 8;
- if (pad_len)
- pad_len = 8 - pad_len;
- if (key_len + pad_len < 16)
- pad_len += 8;
- if (pad_len) {
- os_memcpy(keybuf, gsm->GTK[gsm->GN - 1], key_len);
- os_memset(keybuf + key_len, 0, pad_len);
- keybuf[key_len] = 0xdd;
- key_len += pad_len;
- key = keybuf;
- } else
- key = gsm->GTK[gsm->GN - 1];
-
- /*
- * Sub-elem ID[1] | Length[1] | Key Info[2] | Key Length[1] | RSC[8] |
- * Key[5..32].
- */
- subelem_len = 13 + key_len + 8;
- subelem = os_zalloc(subelem_len);
- if (subelem == NULL)
- return NULL;
-
- subelem[0] = FTIE_SUBELEM_GTK;
- subelem[1] = 11 + key_len + 8;
- /* Key ID in B0-B1 of Key Info */
- WPA_PUT_LE16(&subelem[2], gsm->GN & 0x03);
- subelem[4] = gsm->GTK_len;
- wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 5);
- if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 13)) {
- os_free(subelem);
- return NULL;
- }
-
- *len = subelem_len;
- return subelem;
-}
-
-
-#ifdef CONFIG_IEEE80211W
-static u8 * wpa_ft_igtk_subelem(struct wpa_state_machine *sm, size_t *len)
-{
- u8 *subelem, *pos;
- struct wpa_group *gsm = sm->group;
- size_t subelem_len;
-
- /* Sub-elem ID[1] | Length[1] | KeyID[2] | IPN[6] | Key Length[1] |
- * Key[16+8] */
- subelem_len = 1 + 1 + 2 + 6 + 1 + WPA_IGTK_LEN + 8;
- subelem = os_zalloc(subelem_len);
- if (subelem == NULL)
- return NULL;
-
- pos = subelem;
- *pos++ = FTIE_SUBELEM_IGTK;
- *pos++ = subelem_len - 2;
- WPA_PUT_LE16(pos, gsm->GN_igtk);
- pos += 2;
- wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN_igtk, pos);
- pos += 6;
- *pos++ = WPA_IGTK_LEN;
- if (aes_wrap(sm->PTK.kek, WPA_IGTK_LEN / 8,
- gsm->IGTK[gsm->GN_igtk - 4], pos)) {
- os_free(subelem);
- return NULL;
- }
-
- *len = subelem_len;
- return subelem;
-}
-#endif /* CONFIG_IEEE80211W */
-
-
-static u8 * wpa_ft_process_rdie(u8 *pos, u8 *end, u8 id, u8 descr_count,
- const u8 *ies, size_t ies_len)
-{
- struct ieee802_11_elems parse;
- struct rsn_rdie *rdie;
-
- wpa_printf(MSG_DEBUG, "FT: Resource Request: id=%d descr_count=%d",
- id, descr_count);
- wpa_hexdump(MSG_MSGDUMP, "FT: Resource descriptor IE(s)",
- ies, ies_len);
-
- if (end - pos < (int) sizeof(*rdie)) {
- wpa_printf(MSG_ERROR, "FT: Not enough room for response RDIE");
- return pos;
- }
-
- *pos++ = WLAN_EID_RIC_DATA;
- *pos++ = sizeof(*rdie);
- rdie = (struct rsn_rdie *) pos;
- rdie->id = id;
- rdie->descr_count = 0;
- rdie->status_code = host_to_le16(WLAN_STATUS_SUCCESS);
- pos += sizeof(*rdie);
-
- if (ieee802_11_parse_elems((u8 *) ies, ies_len, &parse, 1) ==
- ParseFailed) {
- wpa_printf(MSG_DEBUG, "FT: Failed to parse request IEs");
- rdie->status_code =
- host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
- return pos;
- }
-
-#ifdef NEED_AP_MLME
- if (parse.wmm_tspec) {
- struct wmm_tspec_element *tspec;
- int res;
-
- if (parse.wmm_tspec_len + 2 < (int) sizeof(*tspec)) {
- wpa_printf(MSG_DEBUG, "FT: Too short WMM TSPEC IE "
- "(%d)", (int) parse.wmm_tspec_len);
- rdie->status_code =
- host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
- return pos;
- }
- if (end - pos < (int) sizeof(*tspec)) {
- wpa_printf(MSG_ERROR, "FT: Not enough room for "
- "response TSPEC");
- rdie->status_code =
- host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
- return pos;
- }
- tspec = (struct wmm_tspec_element *) pos;
- os_memcpy(tspec, parse.wmm_tspec - 2, sizeof(*tspec));
- res = wmm_process_tspec(tspec);
- wpa_printf(MSG_DEBUG, "FT: ADDTS processing result: %d", res);
- if (res == WMM_ADDTS_STATUS_INVALID_PARAMETERS)
- rdie->status_code =
- host_to_le16(WLAN_STATUS_INVALID_PARAMETERS);
- else if (res == WMM_ADDTS_STATUS_REFUSED)
- rdie->status_code =
- host_to_le16(WLAN_STATUS_REQUEST_DECLINED);
- else {
- /* TSPEC accepted; include updated TSPEC in response */
- rdie->descr_count = 1;
- pos += sizeof(*tspec);
- }
- return pos;
- }
-#endif /* NEED_AP_MLME */
-
- wpa_printf(MSG_DEBUG, "FT: No supported resource requested");
- rdie->status_code = host_to_le16(WLAN_STATUS_UNSPECIFIED_FAILURE);
- return pos;
-}
-
-
-static u8 * wpa_ft_process_ric(u8 *pos, u8 *end, const u8 *ric, size_t ric_len)
-{
- const u8 *rpos, *start;
- const struct rsn_rdie *rdie;
-
- wpa_hexdump(MSG_MSGDUMP, "FT: RIC Request", ric, ric_len);
-
- rpos = ric;
- while (rpos + sizeof(*rdie) < ric + ric_len) {
- if (rpos[0] != WLAN_EID_RIC_DATA || rpos[1] < sizeof(*rdie) ||
- rpos + 2 + rpos[1] > ric + ric_len)
- break;
- rdie = (const struct rsn_rdie *) (rpos + 2);
- rpos += 2 + rpos[1];
- start = rpos;
-
- while (rpos + 2 <= ric + ric_len &&
- rpos + 2 + rpos[1] <= ric + ric_len) {
- if (rpos[0] == WLAN_EID_RIC_DATA)
- break;
- rpos += 2 + rpos[1];
- }
- pos = wpa_ft_process_rdie(pos, end, rdie->id,
- rdie->descr_count,
- start, rpos - start);
- }
-
- return pos;
-}
-
-
-u8 * wpa_sm_write_assoc_resp_ies(struct wpa_state_machine *sm, u8 *pos,
- size_t max_len, int auth_alg,
- const u8 *req_ies, size_t req_ies_len)
-{
- u8 *end, *mdie, *ftie, *rsnie = NULL, *r0kh_id, *subelem = NULL;
- size_t mdie_len, ftie_len, rsnie_len = 0, r0kh_id_len, subelem_len = 0;
- int res;
- struct wpa_auth_config *conf;
- struct rsn_ftie *_ftie;
- struct wpa_ft_ies parse;
- u8 *ric_start;
- u8 *anonce, *snonce;
-
- if (sm == NULL)
- return pos;
-
- conf = &sm->wpa_auth->conf;
-
- if (sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_IEEE8021X &&
- sm->wpa_key_mgmt != WPA_KEY_MGMT_FT_PSK)
- return pos;
-
- end = pos + max_len;
-
- if (auth_alg == WLAN_AUTH_FT) {
- /*
- * RSN (only present if this is a Reassociation Response and
- * part of a fast BSS transition)
- */
- res = wpa_write_rsn_ie(conf, pos, end - pos, sm->pmk_r1_name);
- if (res < 0)
- return pos;
- rsnie = pos;
- rsnie_len = res;
- pos += res;
- }
-
- /* Mobility Domain Information */
- res = wpa_write_mdie(conf, pos, end - pos);
- if (res < 0)
- return pos;
- mdie = pos;
- mdie_len = res;
- pos += res;
-
- /* Fast BSS Transition Information */
- if (auth_alg == WLAN_AUTH_FT) {
- subelem = wpa_ft_gtk_subelem(sm, &subelem_len);
- r0kh_id = sm->r0kh_id;
- r0kh_id_len = sm->r0kh_id_len;
- anonce = sm->ANonce;
- snonce = sm->SNonce;
-#ifdef CONFIG_IEEE80211W
- if (sm->mgmt_frame_prot) {
- u8 *igtk;
- size_t igtk_len;
- u8 *nbuf;
- igtk = wpa_ft_igtk_subelem(sm, &igtk_len);
- if (igtk == NULL) {
- os_free(subelem);
- return pos;
- }
- nbuf = os_realloc(subelem, subelem_len + igtk_len);
- if (nbuf == NULL) {
- os_free(subelem);
- os_free(igtk);
- return pos;
- }
- subelem = nbuf;
- os_memcpy(subelem + subelem_len, igtk, igtk_len);
- subelem_len += igtk_len;
- os_free(igtk);
- }
-#endif /* CONFIG_IEEE80211W */
- } else {
- r0kh_id = conf->r0_key_holder;
- r0kh_id_len = conf->r0_key_holder_len;
- anonce = NULL;
- snonce = NULL;
- }
- res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, anonce, snonce, pos,
- end - pos, subelem, subelem_len);
- os_free(subelem);
- if (res < 0)
- return pos;
- ftie = pos;
- ftie_len = res;
- pos += res;
-
- os_free(sm->assoc_resp_ftie);
- sm->assoc_resp_ftie = os_malloc(ftie_len);
- if (sm->assoc_resp_ftie)
- os_memcpy(sm->assoc_resp_ftie, ftie, ftie_len);
-
- _ftie = (struct rsn_ftie *) (ftie + 2);
- if (auth_alg == WLAN_AUTH_FT)
- _ftie->mic_control[1] = 3; /* Information element count */
-
- ric_start = pos;
- if (wpa_ft_parse_ies(req_ies, req_ies_len, &parse) == 0 && parse.ric) {
- pos = wpa_ft_process_ric(pos, end, parse.ric, parse.ric_len);
- if (auth_alg == WLAN_AUTH_FT)
- _ftie->mic_control[1] +=
- ieee802_11_ie_count(ric_start,
- pos - ric_start);
- }
- if (ric_start == pos)
- ric_start = NULL;
-
- if (auth_alg == WLAN_AUTH_FT &&
- wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 6,
- mdie, mdie_len, ftie, ftie_len,
- rsnie, rsnie_len,
- ric_start, ric_start ? pos - ric_start : 0,
- _ftie->mic) < 0)
- wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
-
- return pos;
-}
-
-
-static int wpa_ft_parse_ftie(const u8 *ie, size_t ie_len,
- struct wpa_ft_ies *parse)
-{
- const u8 *end, *pos;
-
- parse->ftie = ie;
- parse->ftie_len = ie_len;
-
- pos = ie + sizeof(struct rsn_ftie);
- end = ie + ie_len;
-
- while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
- switch (pos[0]) {
- case FTIE_SUBELEM_R1KH_ID:
- if (pos[1] != FT_R1KH_ID_LEN) {
- wpa_printf(MSG_DEBUG, "FT: Invalid R1KH-ID "
- "length in FTIE: %d", pos[1]);
- return -1;
- }
- parse->r1kh_id = pos + 2;
- break;
- case FTIE_SUBELEM_GTK:
- parse->gtk = pos + 2;
- parse->gtk_len = pos[1];
- break;
- case FTIE_SUBELEM_R0KH_ID:
- if (pos[1] < 1 || pos[1] > FT_R0KH_ID_MAX_LEN) {
- wpa_printf(MSG_DEBUG, "FT: Invalid R0KH-ID "
- "length in FTIE: %d", pos[1]);
- return -1;
- }
- parse->r0kh_id = pos + 2;
- parse->r0kh_id_len = pos[1];
- break;
- }
-
- pos += 2 + pos[1];
- }
-
- return 0;
-}
-
-
-static int wpa_ft_parse_ies(const u8 *ies, size_t ies_len,
- struct wpa_ft_ies *parse)
-{
- const u8 *end, *pos;
- struct wpa_ie_data data;
- int ret;
- const struct rsn_ftie *ftie;
- int prot_ie_count = 0;
-
- os_memset(parse, 0, sizeof(*parse));
- if (ies == NULL)
- return 0;
-
- pos = ies;
- end = ies + ies_len;
- while (pos + 2 <= end && pos + 2 + pos[1] <= end) {
- switch (pos[0]) {
- case WLAN_EID_RSN:
- parse->rsn = pos + 2;
- parse->rsn_len = pos[1];
- ret = wpa_parse_wpa_ie_rsn(parse->rsn - 2,
- parse->rsn_len + 2,
- &data);
- if (ret < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to parse "
- "RSN IE: %d", ret);
- return -1;
- }
- if (data.num_pmkid == 1 && data.pmkid)
- parse->rsn_pmkid = data.pmkid;
- break;
- case WLAN_EID_MOBILITY_DOMAIN:
- parse->mdie = pos + 2;
- parse->mdie_len = pos[1];
- break;
- case WLAN_EID_FAST_BSS_TRANSITION:
- if (pos[1] < sizeof(*ftie))
- return -1;
- ftie = (const struct rsn_ftie *) (pos + 2);
- prot_ie_count = ftie->mic_control[1];
- if (wpa_ft_parse_ftie(pos + 2, pos[1], parse) < 0)
- return -1;
- break;
- case WLAN_EID_RIC_DATA:
- if (parse->ric == NULL)
- parse->ric = pos;
- }
-
- pos += 2 + pos[1];
- }
-
- if (prot_ie_count == 0)
- return 0; /* no MIC */
-
- /*
- * Check that the protected IE count matches with IEs included in the
- * frame.
- */
- if (parse->rsn)
- prot_ie_count--;
- if (parse->mdie)
- prot_ie_count--;
- if (parse->ftie)
- prot_ie_count--;
- if (prot_ie_count < 0) {
- wpa_printf(MSG_DEBUG, "FT: Some required IEs not included in "
- "the protected IE count");
- return -1;
- }
-
- if (prot_ie_count == 0 && parse->ric) {
- wpa_printf(MSG_DEBUG, "FT: RIC IE(s) in the frame, but not "
- "included in protected IE count");
- return -1;
- }
-
- /* Determine the end of the RIC IE(s) */
- pos = parse->ric;
- while (pos && pos + 2 <= end && pos + 2 + pos[1] <= end &&
- prot_ie_count) {
- prot_ie_count--;
- pos += 2 + pos[1];
- }
- parse->ric_len = pos - parse->ric;
- if (prot_ie_count) {
- wpa_printf(MSG_DEBUG, "FT: %d protected IEs missing from "
- "frame", (int) prot_ie_count);
- return -1;
- }
-
- return 0;
-}
-
-
-static inline int wpa_auth_set_key(struct wpa_authenticator *wpa_auth,
- int vlan_id,
- enum wpa_alg alg, const u8 *addr, int idx,
- u8 *key, size_t key_len)
-{
- if (wpa_auth->cb.set_key == NULL)
- return -1;
- return wpa_auth->cb.set_key(wpa_auth->cb.ctx, vlan_id, alg, addr, idx,
- key, key_len);
-}
-
-
-void wpa_ft_install_ptk(struct wpa_state_machine *sm)
-{
- enum wpa_alg alg;
- int klen;
-
- /* MLME-SETKEYS.request(PTK) */
- if (sm->pairwise == WPA_CIPHER_TKIP) {
- alg = WPA_ALG_TKIP;
- klen = 32;
- } else if (sm->pairwise == WPA_CIPHER_CCMP) {
- alg = WPA_ALG_CCMP;
- klen = 16;
- } else {
- wpa_printf(MSG_DEBUG, "FT: Unknown pairwise alg 0x%x - skip "
- "PTK configuration", sm->pairwise);
- return;
- }
-
- /* FIX: add STA entry to kernel/driver here? The set_key will fail
- * most likely without this.. At the moment, STA entry is added only
- * after association has been completed. This function will be called
- * again after association to get the PTK configured, but that could be
- * optimized by adding the STA entry earlier.
- */
- if (wpa_auth_set_key(sm->wpa_auth, 0, alg, sm->addr, 0,
- sm->PTK.tk1, klen))
- return;
-
- /* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
- sm->pairwise_set = TRUE;
-}
-
-
-static u16 wpa_ft_process_auth_req(struct wpa_state_machine *sm,
- const u8 *ies, size_t ies_len,
- u8 **resp_ies, size_t *resp_ies_len)
-{
- struct rsn_mdie *mdie;
- struct rsn_ftie *ftie;
- u8 pmk_r1[PMK_LEN], pmk_r1_name[WPA_PMK_NAME_LEN];
- u8 ptk_name[WPA_PMK_NAME_LEN];
- struct wpa_auth_config *conf;
- struct wpa_ft_ies parse;
- size_t buflen, ptk_len;
- int ret;
- u8 *pos, *end;
- int pairwise;
-
- *resp_ies = NULL;
- *resp_ies_len = 0;
-
- sm->pmk_r1_name_valid = 0;
- conf = &sm->wpa_auth->conf;
-
- wpa_hexdump(MSG_DEBUG, "FT: Received authentication frame IEs",
- ies, ies_len);
-
- if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- mdie = (struct rsn_mdie *) parse.mdie;
- if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
- os_memcmp(mdie->mobility_domain,
- sm->wpa_auth->conf.mobility_domain,
- MOBILITY_DOMAIN_ID_LEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
- return WLAN_STATUS_INVALID_MDIE;
- }
-
- ftie = (struct rsn_ftie *) parse.ftie;
- if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
- wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
- return WLAN_STATUS_INVALID_FTIE;
- }
-
- os_memcpy(sm->SNonce, ftie->snonce, WPA_NONCE_LEN);
-
- if (parse.r0kh_id == NULL) {
- wpa_printf(MSG_DEBUG, "FT: Invalid FTIE - no R0KH-ID");
- return WLAN_STATUS_INVALID_FTIE;
- }
-
- wpa_hexdump(MSG_DEBUG, "FT: STA R0KH-ID",
- parse.r0kh_id, parse.r0kh_id_len);
- os_memcpy(sm->r0kh_id, parse.r0kh_id, parse.r0kh_id_len);
- sm->r0kh_id_len = parse.r0kh_id_len;
-
- if (parse.rsn_pmkid == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
- return WLAN_STATUS_INVALID_PMKID;
- }
-
- wpa_hexdump(MSG_DEBUG, "FT: Requested PMKR0Name",
- parse.rsn_pmkid, WPA_PMK_NAME_LEN);
- wpa_derive_pmk_r1_name(parse.rsn_pmkid,
- sm->wpa_auth->conf.r1_key_holder, sm->addr,
- pmk_r1_name);
- wpa_hexdump(MSG_DEBUG, "FT: Derived requested PMKR1Name",
- pmk_r1_name, WPA_PMK_NAME_LEN);
-
- if (wpa_ft_fetch_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1_name, pmk_r1,
- &pairwise) < 0) {
- if (wpa_ft_pull_pmk_r1(sm->wpa_auth, sm->addr, sm->r0kh_id,
- sm->r0kh_id_len, parse.rsn_pmkid) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Did not have matching "
- "PMK-R1 and unknown R0KH-ID");
- return WLAN_STATUS_INVALID_PMKID;
- }
-
- /*
- * TODO: Should return "status pending" (and the caller should
- * not send out response now). The real response will be sent
- * once the response from R0KH is received.
- */
- return WLAN_STATUS_INVALID_PMKID;
- }
-
- wpa_hexdump_key(MSG_DEBUG, "FT: Selected PMK-R1", pmk_r1, PMK_LEN);
- sm->pmk_r1_name_valid = 1;
- os_memcpy(sm->pmk_r1_name, pmk_r1_name, WPA_PMK_NAME_LEN);
-
- if (os_get_random(sm->ANonce, WPA_NONCE_LEN)) {
- wpa_printf(MSG_DEBUG, "FT: Failed to get random data for "
- "ANonce");
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
- sm->SNonce, WPA_NONCE_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: Generated ANonce",
- sm->ANonce, WPA_NONCE_LEN);
-
- ptk_len = pairwise != WPA_CIPHER_CCMP ? 64 : 48;
- wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
- sm->wpa_auth->addr, pmk_r1_name,
- (u8 *) &sm->PTK, ptk_len, ptk_name);
- wpa_hexdump_key(MSG_DEBUG, "FT: PTK",
- (u8 *) &sm->PTK, ptk_len);
- wpa_hexdump(MSG_DEBUG, "FT: PTKName", ptk_name, WPA_PMK_NAME_LEN);
-
- sm->pairwise = pairwise;
- wpa_ft_install_ptk(sm);
-
- buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
- 2 + FT_R1KH_ID_LEN + 200;
- *resp_ies = os_zalloc(buflen);
- if (*resp_ies == NULL) {
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- pos = *resp_ies;
- end = *resp_ies + buflen;
-
- ret = wpa_write_rsn_ie(conf, pos, end - pos, parse.rsn_pmkid);
- if (ret < 0) {
- os_free(*resp_ies);
- *resp_ies = NULL;
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
- pos += ret;
-
- ret = wpa_write_mdie(conf, pos, end - pos);
- if (ret < 0) {
- os_free(*resp_ies);
- *resp_ies = NULL;
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
- pos += ret;
-
- ret = wpa_write_ftie(conf, parse.r0kh_id, parse.r0kh_id_len,
- sm->ANonce, sm->SNonce, pos, end - pos, NULL, 0);
- if (ret < 0) {
- os_free(*resp_ies);
- *resp_ies = NULL;
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
- pos += ret;
-
- *resp_ies_len = pos - *resp_ies;
-
- return WLAN_STATUS_SUCCESS;
-}
-
-
-void wpa_ft_process_auth(struct wpa_state_machine *sm, const u8 *bssid,
- u16 auth_transaction, const u8 *ies, size_t ies_len,
- void (*cb)(void *ctx, const u8 *dst, const u8 *bssid,
- u16 auth_transaction, u16 status,
- const u8 *ies, size_t ies_len),
- void *ctx)
-{
- u16 status;
- u8 *resp_ies;
- size_t resp_ies_len;
-
- if (sm == NULL) {
- wpa_printf(MSG_DEBUG, "FT: Received authentication frame, but "
- "WPA SM not available");
- return;
- }
-
- wpa_printf(MSG_DEBUG, "FT: Received authentication frame: STA=" MACSTR
- " BSSID=" MACSTR " transaction=%d",
- MAC2STR(sm->addr), MAC2STR(bssid), auth_transaction);
- status = wpa_ft_process_auth_req(sm, ies, ies_len, &resp_ies,
- &resp_ies_len);
-
- wpa_printf(MSG_DEBUG, "FT: FT authentication response: dst=" MACSTR
- " auth_transaction=%d status=%d",
- MAC2STR(sm->addr), auth_transaction + 1, status);
- wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
- cb(ctx, sm->addr, bssid, auth_transaction + 1, status,
- resp_ies, resp_ies_len);
- os_free(resp_ies);
-}
-
-
-u16 wpa_ft_validate_reassoc(struct wpa_state_machine *sm, const u8 *ies,
- size_t ies_len)
-{
- struct wpa_ft_ies parse;
- struct rsn_mdie *mdie;
- struct rsn_ftie *ftie;
- u8 mic[16];
- unsigned int count;
-
- if (sm == NULL)
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
-
- wpa_hexdump(MSG_DEBUG, "FT: Reassoc Req IEs", ies, ies_len);
-
- if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to parse FT IEs");
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- if (parse.rsn == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No RSNIE in Reassoc Req");
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- if (parse.rsn_pmkid == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No PMKID in RSNIE");
- return WLAN_STATUS_INVALID_PMKID;
- }
-
- if (os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN) != 0)
- {
- wpa_printf(MSG_DEBUG, "FT: PMKID in Reassoc Req did not match "
- "with the PMKR1Name derived from auth request");
- return WLAN_STATUS_INVALID_PMKID;
- }
-
- mdie = (struct rsn_mdie *) parse.mdie;
- if (mdie == NULL || parse.mdie_len < sizeof(*mdie) ||
- os_memcmp(mdie->mobility_domain,
- sm->wpa_auth->conf.mobility_domain,
- MOBILITY_DOMAIN_ID_LEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Invalid MDIE");
- return WLAN_STATUS_INVALID_MDIE;
- }
-
- ftie = (struct rsn_ftie *) parse.ftie;
- if (ftie == NULL || parse.ftie_len < sizeof(*ftie)) {
- wpa_printf(MSG_DEBUG, "FT: Invalid FTIE");
- return WLAN_STATUS_INVALID_FTIE;
- }
-
- if (os_memcmp(ftie->snonce, sm->SNonce, WPA_NONCE_LEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: SNonce mismatch in FTIE");
- wpa_hexdump(MSG_DEBUG, "FT: Received SNonce",
- ftie->snonce, WPA_NONCE_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: Expected SNonce",
- sm->SNonce, WPA_NONCE_LEN);
- return -1;
- }
-
- if (os_memcmp(ftie->anonce, sm->ANonce, WPA_NONCE_LEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: ANonce mismatch in FTIE");
- wpa_hexdump(MSG_DEBUG, "FT: Received ANonce",
- ftie->anonce, WPA_NONCE_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: Expected ANonce",
- sm->ANonce, WPA_NONCE_LEN);
- return -1;
- }
-
-
- if (parse.r0kh_id == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No R0KH-ID subelem in FTIE");
- return -1;
- }
-
- if (parse.r0kh_id_len != sm->r0kh_id_len ||
- os_memcmp(parse.r0kh_id, sm->r0kh_id, parse.r0kh_id_len) != 0) {
- wpa_printf(MSG_DEBUG, "FT: R0KH-ID in FTIE did not match with "
- "the current R0KH-ID");
- wpa_hexdump(MSG_DEBUG, "FT: R0KH-ID in FTIE",
- parse.r0kh_id, parse.r0kh_id_len);
- wpa_hexdump(MSG_DEBUG, "FT: The current R0KH-ID",
- sm->r0kh_id, sm->r0kh_id_len);
- return -1;
- }
-
- if (parse.r1kh_id == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No R1KH-ID subelem in FTIE");
- return -1;
- }
-
- if (os_memcmp(parse.r1kh_id, sm->wpa_auth->conf.r1_key_holder,
- FT_R1KH_ID_LEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Unknown R1KH-ID used in "
- "ReassocReq");
- wpa_hexdump(MSG_DEBUG, "FT: R1KH-ID in FTIE",
- parse.r1kh_id, FT_R1KH_ID_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: Expected R1KH-ID",
- sm->wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN);
- return -1;
- }
-
- if (parse.rsn_pmkid == NULL ||
- os_memcmp(parse.rsn_pmkid, sm->pmk_r1_name, WPA_PMK_NAME_LEN)) {
- wpa_printf(MSG_DEBUG, "FT: No matching PMKR1Name (PMKID) in "
- "RSNIE (pmkid=%d)", !!parse.rsn_pmkid);
- return -1;
- }
-
- count = 3;
- if (parse.ric)
- count++;
- if (ftie->mic_control[1] != count) {
- wpa_printf(MSG_DEBUG, "FT: Unexpected IE count in MIC "
- "Control: received %u expected %u",
- ftie->mic_control[1], count);
- return -1;
- }
-
- if (wpa_ft_mic(sm->PTK.kck, sm->addr, sm->wpa_auth->addr, 5,
- parse.mdie - 2, parse.mdie_len + 2,
- parse.ftie - 2, parse.ftie_len + 2,
- parse.rsn - 2, parse.rsn_len + 2,
- parse.ric, parse.ric_len,
- mic) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to calculate MIC");
- return WLAN_STATUS_UNSPECIFIED_FAILURE;
- }
-
- if (os_memcmp(mic, ftie->mic, 16) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Invalid MIC in FTIE");
- wpa_hexdump(MSG_MSGDUMP, "FT: Received MIC", ftie->mic, 16);
- wpa_hexdump(MSG_MSGDUMP, "FT: Calculated MIC", mic, 16);
- return WLAN_STATUS_INVALID_FTIE;
- }
-
- return WLAN_STATUS_SUCCESS;
-}
-
-
-int wpa_ft_action_rx(struct wpa_state_machine *sm, const u8 *data, size_t len)
-{
- const u8 *sta_addr, *target_ap;
- const u8 *ies;
- size_t ies_len;
- u8 action;
- struct ft_rrb_frame *frame;
-
- if (sm == NULL)
- return -1;
-
- /*
- * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
- * FT Request action frame body[variable]
- */
-
- if (len < 14) {
- wpa_printf(MSG_DEBUG, "FT: Too short FT Action frame "
- "(len=%lu)", (unsigned long) len);
- return -1;
- }
-
- action = data[1];
- sta_addr = data + 2;
- target_ap = data + 8;
- ies = data + 14;
- ies_len = len - 14;
-
- wpa_printf(MSG_DEBUG, "FT: Received FT Action frame (STA=" MACSTR
- " Target AP=" MACSTR " Action=%d)",
- MAC2STR(sta_addr), MAC2STR(target_ap), action);
-
- if (os_memcmp(sta_addr, sm->addr, ETH_ALEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Mismatch in FT Action STA address: "
- "STA=" MACSTR " STA-Address=" MACSTR,
- MAC2STR(sm->addr), MAC2STR(sta_addr));
- return -1;
- }
-
- /*
- * Do some sanity checking on the target AP address (not own and not
- * broadcast. This could be extended to filter based on a list of known
- * APs in the MD (if such a list were configured).
- */
- if ((target_ap[0] & 0x01) ||
- os_memcmp(target_ap, sm->wpa_auth->addr, ETH_ALEN) == 0) {
- wpa_printf(MSG_DEBUG, "FT: Invalid Target AP in FT Action "
- "frame");
- return -1;
- }
-
- wpa_hexdump(MSG_MSGDUMP, "FT: Action frame body", ies, ies_len);
-
- /* RRB - Forward action frame to the target AP */
- frame = os_malloc(sizeof(*frame) + len);
- frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
- frame->packet_type = FT_PACKET_REQUEST;
- frame->action_length = host_to_le16(len);
- os_memcpy(frame->ap_address, sm->wpa_auth->addr, ETH_ALEN);
- os_memcpy(frame + 1, data, len);
-
- wpa_ft_rrb_send(sm->wpa_auth, target_ap, (u8 *) frame,
- sizeof(*frame) + len);
- os_free(frame);
-
- return 0;
-}
-
-
-static int wpa_ft_rrb_rx_request(struct wpa_authenticator *wpa_auth,
- const u8 *current_ap, const u8 *sta_addr,
- const u8 *body, size_t len)
-{
- struct wpa_state_machine *sm;
- u16 status;
- u8 *resp_ies, *pos;
- size_t resp_ies_len, rlen;
- struct ft_rrb_frame *frame;
-
- sm = wpa_ft_add_sta(wpa_auth, sta_addr);
- if (sm == NULL) {
- wpa_printf(MSG_DEBUG, "FT: Failed to add new STA based on "
- "RRB Request");
- return -1;
- }
-
- wpa_hexdump(MSG_MSGDUMP, "FT: RRB Request Frame body", body, len);
-
- status = wpa_ft_process_auth_req(sm, body, len, &resp_ies,
- &resp_ies_len);
-
- wpa_printf(MSG_DEBUG, "FT: RRB authentication response: STA=" MACSTR
- " CurrentAP=" MACSTR " status=%d",
- MAC2STR(sm->addr), MAC2STR(current_ap), status);
- wpa_hexdump(MSG_DEBUG, "FT: Response IEs", resp_ies, resp_ies_len);
-
- /* RRB - Forward action frame response to the Current AP */
-
- /*
- * data: Category[1] Action[1] STA_Address[6] Target_AP_Address[6]
- * Status_Code[2] FT Request action frame body[variable]
- */
- rlen = 2 + 2 * ETH_ALEN + 2 + resp_ies_len;
-
- frame = os_malloc(sizeof(*frame) + rlen);
- frame->frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
- frame->packet_type = FT_PACKET_RESPONSE;
- frame->action_length = host_to_le16(rlen);
- os_memcpy(frame->ap_address, wpa_auth->addr, ETH_ALEN);
- pos = (u8 *) (frame + 1);
- *pos++ = WLAN_ACTION_FT;
- *pos++ = 2; /* Action: Response */
- os_memcpy(pos, sta_addr, ETH_ALEN);
- pos += ETH_ALEN;
- os_memcpy(pos, wpa_auth->addr, ETH_ALEN);
- pos += ETH_ALEN;
- WPA_PUT_LE16(pos, status);
- pos += 2;
- if (resp_ies) {
- os_memcpy(pos, resp_ies, resp_ies_len);
- os_free(resp_ies);
- }
-
- wpa_ft_rrb_send(wpa_auth, current_ap, (u8 *) frame,
- sizeof(*frame) + rlen);
- os_free(frame);
-
- return 0;
-}
-
-
-static int wpa_ft_rrb_rx_pull(struct wpa_authenticator *wpa_auth,
- const u8 *src_addr,
- const u8 *data, size_t data_len)
-{
- struct ft_r0kh_r1kh_pull_frame *frame, f;
- struct ft_remote_r1kh *r1kh;
- struct ft_r0kh_r1kh_resp_frame resp, r;
- u8 pmk_r0[PMK_LEN];
- int pairwise;
-
- wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull");
-
- if (data_len < sizeof(*frame))
- return -1;
-
- r1kh = wpa_auth->conf.r1kh_list;
- while (r1kh) {
- if (os_memcmp(r1kh->addr, src_addr, ETH_ALEN) == 0)
- break;
- r1kh = r1kh->next;
- }
- if (r1kh == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No matching R1KH address found for "
- "PMK-R1 pull source address " MACSTR,
- MAC2STR(src_addr));
- return -1;
- }
-
- frame = (struct ft_r0kh_r1kh_pull_frame *) data;
- /* aes_unwrap() does not support inplace decryption, so use a temporary
- * buffer for the data. */
- if (aes_unwrap(r1kh->key, (FT_R0KH_R1KH_PULL_DATA_LEN + 7) / 8,
- frame->nonce, f.nonce) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
- "request from " MACSTR, MAC2STR(src_addr));
- return -1;
- }
-
- wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
- f.nonce, sizeof(f.nonce));
- wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR0Name",
- f.pmk_r0_name, WPA_PMK_NAME_LEN);
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
- MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
-
- os_memset(&resp, 0, sizeof(resp));
- resp.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
- resp.packet_type = FT_PACKET_R0KH_R1KH_RESP;
- resp.data_length = host_to_le16(FT_R0KH_R1KH_RESP_DATA_LEN);
- os_memcpy(resp.ap_address, wpa_auth->addr, ETH_ALEN);
-
- /* aes_wrap() does not support inplace encryption, so use a temporary
- * buffer for the data. */
- os_memcpy(r.nonce, f.nonce, sizeof(f.nonce));
- os_memcpy(r.r1kh_id, f.r1kh_id, FT_R1KH_ID_LEN);
- os_memcpy(r.s1kh_id, f.s1kh_id, ETH_ALEN);
- if (wpa_ft_fetch_pmk_r0(wpa_auth, f.s1kh_id, f.pmk_r0_name, pmk_r0,
- &pairwise) < 0) {
- wpa_printf(MSG_DEBUG, "FT: No matching PMKR0Name found for "
- "PMK-R1 pull");
- return -1;
- }
-
- wpa_derive_pmk_r1(pmk_r0, f.pmk_r0_name, f.r1kh_id, f.s1kh_id,
- r.pmk_r1, r.pmk_r1_name);
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", r.pmk_r1, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", r.pmk_r1_name,
- WPA_PMK_NAME_LEN);
- r.pairwise = host_to_le16(pairwise);
-
- if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
- r.nonce, resp.nonce) < 0) {
- os_memset(pmk_r0, 0, PMK_LEN);
- return -1;
- }
-
- os_memset(pmk_r0, 0, PMK_LEN);
-
- wpa_ft_rrb_send(wpa_auth, src_addr, (u8 *) &resp, sizeof(resp));
-
- return 0;
-}
-
-
-static int wpa_ft_rrb_rx_resp(struct wpa_authenticator *wpa_auth,
- const u8 *src_addr,
- const u8 *data, size_t data_len)
-{
- struct ft_r0kh_r1kh_resp_frame *frame, f;
- struct ft_remote_r0kh *r0kh;
- int pairwise;
-
- wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 pull response");
-
- if (data_len < sizeof(*frame))
- return -1;
-
- r0kh = wpa_auth->conf.r0kh_list;
- while (r0kh) {
- if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
- break;
- r0kh = r0kh->next;
- }
- if (r0kh == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
- "PMK-R0 pull response source address " MACSTR,
- MAC2STR(src_addr));
- return -1;
- }
-
- frame = (struct ft_r0kh_r1kh_resp_frame *) data;
- /* aes_unwrap() does not support inplace decryption, so use a temporary
- * buffer for the data. */
- if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_RESP_DATA_LEN + 7) / 8,
- frame->nonce, f.nonce) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 pull "
- "response from " MACSTR, MAC2STR(src_addr));
- return -1;
- }
-
- if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
- != 0) {
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull response did not use a "
- "matching R1KH-ID");
- return -1;
- }
-
- /* TODO: verify that <nonce,s1kh_id> matches with a pending request
- * and call this requests callback function to finish request
- * processing */
-
- pairwise = le_to_host16(f.pairwise);
- wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - nonce",
- f.nonce, sizeof(f.nonce));
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 pull - R1KH-ID=" MACSTR "S1KH-ID="
- MACSTR " pairwise=0x%x",
- MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 pull - PMK-R1",
- f.pmk_r1, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 pull - PMKR1Name",
- f.pmk_r1_name, WPA_PMK_NAME_LEN);
-
- wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
- pairwise);
- os_memset(f.pmk_r1, 0, PMK_LEN);
-
- return 0;
-}
-
-
-static int wpa_ft_rrb_rx_push(struct wpa_authenticator *wpa_auth,
- const u8 *src_addr,
- const u8 *data, size_t data_len)
-{
- struct ft_r0kh_r1kh_push_frame *frame, f;
- struct ft_remote_r0kh *r0kh;
- struct os_time now;
- os_time_t tsend;
- int pairwise;
-
- wpa_printf(MSG_DEBUG, "FT: Received PMK-R1 push");
-
- if (data_len < sizeof(*frame))
- return -1;
-
- r0kh = wpa_auth->conf.r0kh_list;
- while (r0kh) {
- if (os_memcmp(r0kh->addr, src_addr, ETH_ALEN) == 0)
- break;
- r0kh = r0kh->next;
- }
- if (r0kh == NULL) {
- wpa_printf(MSG_DEBUG, "FT: No matching R0KH address found for "
- "PMK-R0 push source address " MACSTR,
- MAC2STR(src_addr));
- return -1;
- }
-
- frame = (struct ft_r0kh_r1kh_push_frame *) data;
- /* aes_unwrap() does not support inplace decryption, so use a temporary
- * buffer for the data. */
- if (aes_unwrap(r0kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
- frame->timestamp, f.timestamp) < 0) {
- wpa_printf(MSG_DEBUG, "FT: Failed to decrypt PMK-R1 push from "
- MACSTR, MAC2STR(src_addr));
- return -1;
- }
-
- os_get_time(&now);
- tsend = WPA_GET_LE32(f.timestamp);
- if ((now.sec > tsend && now.sec - tsend > 60) ||
- (now.sec < tsend && tsend - now.sec > 60)) {
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not have a valid "
- "timestamp: sender time %d own time %d\n",
- (int) tsend, (int) now.sec);
- return -1;
- }
-
- if (os_memcmp(f.r1kh_id, wpa_auth->conf.r1_key_holder, FT_R1KH_ID_LEN)
- != 0) {
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 push did not use a matching "
- "R1KH-ID (received " MACSTR " own " MACSTR ")",
- MAC2STR(f.r1kh_id),
- MAC2STR(wpa_auth->conf.r1_key_holder));
- return -1;
- }
-
- pairwise = le_to_host16(f.pairwise);
- wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
- MACSTR " pairwise=0x%x",
- MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id), pairwise);
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1 push - PMK-R1",
- f.pmk_r1, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMK-R1 push - PMKR1Name",
- f.pmk_r1_name, WPA_PMK_NAME_LEN);
-
- wpa_ft_store_pmk_r1(wpa_auth, f.s1kh_id, f.pmk_r1, f.pmk_r1_name,
- pairwise);
- os_memset(f.pmk_r1, 0, PMK_LEN);
-
- return 0;
-}
-
-
-int wpa_ft_rrb_rx(struct wpa_authenticator *wpa_auth, const u8 *src_addr,
- const u8 *data, size_t data_len)
-{
- struct ft_rrb_frame *frame;
- u16 alen;
- const u8 *pos, *end, *start;
- u8 action;
- const u8 *sta_addr, *target_ap_addr;
-
- wpa_printf(MSG_DEBUG, "FT: RRB received frame from remote AP " MACSTR,
- MAC2STR(src_addr));
-
- if (data_len < sizeof(*frame)) {
- wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (data_len=%lu)",
- (unsigned long) data_len);
- return -1;
- }
-
- pos = data;
- frame = (struct ft_rrb_frame *) pos;
- pos += sizeof(*frame);
-
- alen = le_to_host16(frame->action_length);
- wpa_printf(MSG_DEBUG, "FT: RRB frame - frame_type=%d packet_type=%d "
- "action_length=%d ap_address=" MACSTR,
- frame->frame_type, frame->packet_type, alen,
- MAC2STR(frame->ap_address));
-
- if (frame->frame_type != RSN_REMOTE_FRAME_TYPE_FT_RRB) {
- /* Discard frame per IEEE Std 802.11r-2008, 11A.10.3 */
- wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with "
- "unrecognized type %d", frame->frame_type);
- return -1;
- }
-
- if (alen > data_len - sizeof(*frame)) {
- wpa_printf(MSG_DEBUG, "FT: RRB frame too short for action "
- "frame");
- return -1;
- }
-
- if (frame->packet_type == FT_PACKET_R0KH_R1KH_PULL)
- return wpa_ft_rrb_rx_pull(wpa_auth, src_addr, data, data_len);
- if (frame->packet_type == FT_PACKET_R0KH_R1KH_RESP)
- return wpa_ft_rrb_rx_resp(wpa_auth, src_addr, data, data_len);
- if (frame->packet_type == FT_PACKET_R0KH_R1KH_PUSH)
- return wpa_ft_rrb_rx_push(wpa_auth, src_addr, data, data_len);
-
- wpa_hexdump(MSG_MSGDUMP, "FT: RRB - FT Action frame", pos, alen);
-
- if (alen < 1 + 1 + 2 * ETH_ALEN) {
- wpa_printf(MSG_DEBUG, "FT: Too short RRB frame (not enough "
- "room for Action Frame body); alen=%lu",
- (unsigned long) alen);
- return -1;
- }
- start = pos;
- end = pos + alen;
-
- if (*pos != WLAN_ACTION_FT) {
- wpa_printf(MSG_DEBUG, "FT: Unexpected Action frame category "
- "%d", *pos);
- return -1;
- }
-
- pos++;
- action = *pos++;
- sta_addr = pos;
- pos += ETH_ALEN;
- target_ap_addr = pos;
- pos += ETH_ALEN;
- wpa_printf(MSG_DEBUG, "FT: RRB Action Frame: action=%d sta_addr="
- MACSTR " target_ap_addr=" MACSTR,
- action, MAC2STR(sta_addr), MAC2STR(target_ap_addr));
-
- if (frame->packet_type == FT_PACKET_REQUEST) {
- wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Request");
-
- if (action != 1) {
- wpa_printf(MSG_DEBUG, "FT: Unexpected Action %d in "
- "RRB Request", action);
- return -1;
- }
-
- if (os_memcmp(target_ap_addr, wpa_auth->addr, ETH_ALEN) != 0) {
- wpa_printf(MSG_DEBUG, "FT: Target AP address in the "
- "RRB Request does not match with own "
- "address");
- return -1;
- }
-
- if (wpa_ft_rrb_rx_request(wpa_auth, frame->ap_address,
- sta_addr, pos, end - pos) < 0)
- return -1;
- } else if (frame->packet_type == FT_PACKET_RESPONSE) {
- u16 status_code;
-
- if (end - pos < 2) {
- wpa_printf(MSG_DEBUG, "FT: Not enough room for status "
- "code in RRB Response");
- return -1;
- }
- status_code = WPA_GET_LE16(pos);
- pos += 2;
-
- wpa_printf(MSG_DEBUG, "FT: FT Packet Type - Response "
- "(status_code=%d)", status_code);
-
- if (wpa_ft_action_send(wpa_auth, sta_addr, start, alen) < 0)
- return -1;
- } else {
- wpa_printf(MSG_DEBUG, "FT: RRB discarded frame with unknown "
- "packet_type %d", frame->packet_type);
- return -1;
- }
-
- return 0;
-}
-
-
-static void wpa_ft_generate_pmk_r1(struct wpa_authenticator *wpa_auth,
- struct wpa_ft_pmk_r0_sa *pmk_r0,
- struct ft_remote_r1kh *r1kh,
- const u8 *s1kh_id, int pairwise)
-{
- struct ft_r0kh_r1kh_push_frame frame, f;
- struct os_time now;
-
- os_memset(&frame, 0, sizeof(frame));
- frame.frame_type = RSN_REMOTE_FRAME_TYPE_FT_RRB;
- frame.packet_type = FT_PACKET_R0KH_R1KH_PUSH;
- frame.data_length = host_to_le16(FT_R0KH_R1KH_PUSH_DATA_LEN);
- os_memcpy(frame.ap_address, wpa_auth->addr, ETH_ALEN);
-
- /* aes_wrap() does not support inplace encryption, so use a temporary
- * buffer for the data. */
- os_memcpy(f.r1kh_id, r1kh->id, FT_R1KH_ID_LEN);
- os_memcpy(f.s1kh_id, s1kh_id, ETH_ALEN);
- os_memcpy(f.pmk_r0_name, pmk_r0->pmk_r0_name, WPA_PMK_NAME_LEN);
- wpa_derive_pmk_r1(pmk_r0->pmk_r0, pmk_r0->pmk_r0_name, r1kh->id,
- s1kh_id, f.pmk_r1, f.pmk_r1_name);
- wpa_printf(MSG_DEBUG, "FT: R1KH-ID " MACSTR, MAC2STR(r1kh->id));
- wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", f.pmk_r1, PMK_LEN);
- wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", f.pmk_r1_name,
- WPA_PMK_NAME_LEN);
- os_get_time(&now);
- WPA_PUT_LE32(f.timestamp, now.sec);
- f.pairwise = host_to_le16(pairwise);
- if (aes_wrap(r1kh->key, (FT_R0KH_R1KH_PUSH_DATA_LEN + 7) / 8,
- f.timestamp, frame.timestamp) < 0)
- return;
-
- wpa_ft_rrb_send(wpa_auth, r1kh->addr, (u8 *) &frame, sizeof(frame));
-}
-
-
-void wpa_ft_push_pmk_r1(struct wpa_authenticator *wpa_auth, const u8 *addr)
-{
- struct wpa_ft_pmk_r0_sa *r0;
- struct ft_remote_r1kh *r1kh;
-
- if (!wpa_auth->conf.pmk_r1_push)
- return;
-
- r0 = wpa_auth->ft_pmk_cache->pmk_r0;
- while (r0) {
- if (os_memcmp(r0->spa, addr, ETH_ALEN) == 0)
- break;
- r0 = r0->next;
- }
-
- if (r0 == NULL || r0->pmk_r1_pushed)
- return;
- r0->pmk_r1_pushed = 1;
-
- wpa_printf(MSG_DEBUG, "FT: Deriving and pushing PMK-R1 keys to R1KHs "
- "for STA " MACSTR, MAC2STR(addr));
-
- r1kh = wpa_auth->conf.r1kh_list;
- while (r1kh) {
- wpa_ft_generate_pmk_r1(wpa_auth, r0, r1kh, addr, r0->pairwise);
- r1kh = r1kh->next;
- }
-}
-
-#endif /* CONFIG_IEEE80211R */
projects / mech_eap.git / blobdiff