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authorJouni Malinen <j@w1.fi>2009-12-25 22:05:40 (GMT)
committerJouni Malinen <j@w1.fi>2009-12-25 22:05:40 (GMT)
commit6226e38d002cac786709ef1c24fe09811f70b6d7 (patch)
tree50fe2e34169addfca7ad10e4f73fff99997c5ef4 /src/ap/wpa_auth_ft.c
parentfcfda83bf9ea76a888bc8000f0286f62eec2533b (diff)
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Rename some src/ap files to avoid duplicate file names
Doxygen and some build tools may get a bit confused about same file name being used in different directories. Clean this up a bit by renaming some of the duplicated file names in src/ap.
Diffstat (limited to 'src/ap/wpa_auth_ft.c')
-rw-r--r--src/ap/wpa_auth_ft.c1656
1 files changed, 1656 insertions, 0 deletions
diff --git a/src/ap/wpa_auth_ft.c b/src/ap/wpa_auth_ft.c
new file mode 100644
index 0000000..e2e6b20
--- /dev/null
+++ b/src/ap/wpa_auth_ft.c
@@ -0,0 +1,1656 @@
+/*
+ * 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 "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;
+ 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;
+}
+
+
+static 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];
+ /* 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];
+ /* 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)
+{
+ 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->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)
+{
+ 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);
+ 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)
+{
+ 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->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)
+{
+ 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);
+ 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], pmk_r1_name[WPA_PMK_NAME_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);
+
+ wpa_derive_pmk_r1(pmk_r0, pmk_r0_name, r1kh, sm->addr,
+ pmk_r1, pmk_r1_name);
+ wpa_hexdump_key(MSG_DEBUG, "FT: PMK-R1", pmk_r1, PMK_LEN);
+ wpa_hexdump(MSG_DEBUG, "FT: PMKR1Name", pmk_r1_name, WPA_PMK_NAME_LEN);
+ wpa_ft_store_pmk_r1(sm->wpa_auth, sm->addr, pmk_r1, pmk_r1_name);
+
+ wpa_pmk_r1_to_ptk(pmk_r1, sm->SNonce, sm->ANonce, sm->addr,
+ sm->wpa_auth->addr, 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[1] | Key Length[1] | RSC[8] |
+ * Key[5..32].
+ */
+ subelem_len = 12 + key_len + 8;
+ subelem = os_zalloc(subelem_len);
+ if (subelem == NULL)
+ return NULL;
+
+ subelem[0] = FTIE_SUBELEM_GTK;
+ subelem[1] = 10 + key_len + 8;
+ subelem[2] = gsm->GN & 0x03; /* Key ID in B0-B1 of Key Info */
+ subelem[3] = gsm->GTK_len;
+ wpa_auth_get_seqnum(sm->wpa_auth, NULL, gsm->GN, subelem + 4);
+ if (aes_wrap(sm->PTK.kek, key_len / 8, key, subelem + 12)) {
+ 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, *r0kh_id, *subelem = NULL;
+ size_t mdie_len, ftie_len, rsnie_len, 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;
+
+ 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;
+
+ /* RSN */
+ 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;
+#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;
+ }
+ res = wpa_write_ftie(conf, r0kh_id, r0kh_id_len, NULL, NULL, pos,
+ end - pos, subelem, subelem_len);
+ os_free(subelem);
+ if (res < 0)
+ return pos;
+ ftie = pos;
+ ftie_len = res;
+ pos += res;
+
+ _ftie = (struct rsn_ftie *) (ftie + 2);
+ _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);
+ _ftie->mic_control[1] += ieee802_11_ie_count(ric_start,
+ pos - ric_start);
+ }
+ if (ric_start == pos)
+ ric_start = NULL;
+
+ if (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,
+ 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);
+}
+
+
+static void wpa_ft_install_ptk(struct wpa_state_machine *sm)
+{
+ 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
+ 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. Alternatively, could
+ * re-configure PTK at that point(?).
+ */
+ 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;
+
+ *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) <
+ 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 = sm->pairwise == WPA_CIPHER_CCMP ? 48 : 64;
+ 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);
+
+ 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];
+
+ 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 (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];
+
+ 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) <
+ 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);
+
+ 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;
+
+ 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 */
+
+ 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, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
+ 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);
+ 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;
+
+ 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;
+ }
+
+ wpa_printf(MSG_DEBUG, "FT: PMK-R1 push - R1KH-ID=" MACSTR " S1KH-ID="
+ MACSTR, MAC2STR(f.r1kh_id), MAC2STR(f.s1kh_id));
+ 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);
+ 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)
+{
+ 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);
+ 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);
+ r1kh = r1kh->next;
+ }
+}
+
+#endif /* CONFIG_IEEE80211R */