/*
* wpa_supplicant - SME
- * Copyright (c) 2009-2010, Jouni Malinen <j@w1.fi>
+ * Copyright (c) 2009-2012, Jouni Malinen <j@w1.fi>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
#include "common/ieee802_11_common.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "common/wpa_common.h"
+#include "common/sae.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#include "config.h"
#endif /* CONFIG_IEEE80211W */
-void sme_authenticate(struct wpa_supplicant *wpa_s,
- struct wpa_bss *bss, struct wpa_ssid *ssid)
+#ifdef CONFIG_SAE
+
+static int index_within_array(const int *array, int idx)
+{
+ int i;
+ for (i = 0; i < idx; i++) {
+ if (array[i] == -1)
+ return 0;
+ }
+ return 1;
+}
+
+
+static int sme_set_sae_group(struct wpa_supplicant *wpa_s)
+{
+ int *groups = wpa_s->conf->sae_groups;
+ int default_groups[] = { 19, 20, 21, 25, 26 };
+
+ if (!groups)
+ groups = default_groups;
+
+ /* Configuration may have changed, so validate current index */
+ if (!index_within_array(groups, wpa_s->sme.sae_group_index))
+ return -1;
+
+ for (;;) {
+ int group = groups[wpa_s->sme.sae_group_index];
+ if (group < 0)
+ break;
+ if (sae_set_group(&wpa_s->sme.sae, group) == 0) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected SAE group %d",
+ wpa_s->sme.sae.group);
+ return 0;
+ }
+ wpa_s->sme.sae_group_index++;
+ }
+
+ return -1;
+}
+
+
+static struct wpabuf * sme_auth_build_sae_commit(struct wpa_supplicant *wpa_s,
+ struct wpa_ssid *ssid,
+ const u8 *bssid)
+{
+ struct wpabuf *buf;
+ size_t len;
+
+ if (ssid->passphrase == NULL) {
+ wpa_printf(MSG_DEBUG, "SAE: No password available");
+ return NULL;
+ }
+
+ if (sme_set_sae_group(wpa_s) < 0) {
+ wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
+ return NULL;
+ }
+
+ if (sae_prepare_commit(wpa_s->own_addr, bssid,
+ (u8 *) ssid->passphrase,
+ os_strlen(ssid->passphrase),
+ &wpa_s->sme.sae) < 0) {
+ wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
+ return NULL;
+ }
+
+ len = wpa_s->sme.sae_token ? wpabuf_len(wpa_s->sme.sae_token) : 0;
+ buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
+ if (buf == NULL)
+ return NULL;
+
+ wpabuf_put_le16(buf, 1); /* Transaction seq# */
+ wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
+ sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token);
+
+ return buf;
+}
+
+
+static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s)
+{
+ struct wpabuf *buf;
+
+ buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
+ if (buf == NULL)
+ return NULL;
+
+ wpabuf_put_le16(buf, 2); /* Transaction seq# */
+ wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
+ sae_write_confirm(&wpa_s->sme.sae, buf);
+
+ return buf;
+}
+
+#endif /* CONFIG_SAE */
+
+
+static void sme_send_authentication(struct wpa_supplicant *wpa_s,
+ struct wpa_bss *bss, struct wpa_ssid *ssid,
+ int start)
{
struct wpa_driver_auth_params params;
struct wpa_ssid *old_ssid;
const u8 *md = NULL;
#endif /* CONFIG_IEEE80211R */
int i, bssid_changed;
+ struct wpabuf *resp = NULL;
+ u8 ext_capab[10];
+ int ext_capab_len;
if (bss == NULL) {
wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
"0x%x", params.auth_alg);
}
+#ifdef CONFIG_SAE
+ if (wpa_key_mgmt_sae(ssid->key_mgmt)) {
+ const u8 *rsn;
+ struct wpa_ie_data ied;
+
+ rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
+ if (rsn &&
+ wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0) {
+ if (wpa_key_mgmt_sae(ied.key_mgmt)) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
+ params.auth_alg = WPA_AUTH_ALG_SAE;
+ }
+ }
+ }
+#endif /* CONFIG_SAE */
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (ssid->wep_key_len[i])
wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
wpa_key_mgmt_wpa(ssid->key_mgmt)) {
int try_opportunistic;
- try_opportunistic = ssid->proactive_key_caching &&
+ try_opportunistic = (ssid->proactive_key_caching < 0 ?
+ wpa_s->conf->okc :
+ ssid->proactive_key_caching) &&
(ssid->proto & WPA_PROTO_RSN);
if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
wpa_s->current_ssid,
#endif /* CONFIG_IEEE80211R */
#ifdef CONFIG_IEEE80211W
- wpa_s->sme.mfp = ssid->ieee80211w;
- if (ssid->ieee80211w != NO_MGMT_FRAME_PROTECTION) {
+ wpa_s->sme.mfp = ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
+ wpa_s->conf->pmf : ssid->ieee80211w;
+ if (wpa_s->sme.mfp != NO_MGMT_FRAME_PROTECTION) {
const u8 *rsn = wpa_bss_get_ie(bss, WLAN_EID_RSN);
struct wpa_ie_data _ie;
if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
}
#endif /* CONFIG_HS20 */
-#ifdef CONFIG_INTERWORKING
- if (wpa_s->conf->interworking) {
+ ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab);
+ if (ext_capab_len > 0) {
u8 *pos = wpa_s->sme.assoc_req_ie;
if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
pos += 2 + pos[1];
- os_memmove(pos + 6, pos,
+ os_memmove(pos + ext_capab_len, pos,
wpa_s->sme.assoc_req_ie_len -
(pos - wpa_s->sme.assoc_req_ie));
- wpa_s->sme.assoc_req_ie_len += 6;
- *pos++ = WLAN_EID_EXT_CAPAB;
- *pos++ = 4;
- *pos++ = 0x00;
- *pos++ = 0x00;
- *pos++ = 0x00;
- *pos++ = 0x80; /* Bit 31 - Interworking */
+ wpa_s->sme.assoc_req_ie_len += ext_capab_len;
+ os_memcpy(pos, ext_capab, ext_capab_len);
+ }
+
+#ifdef CONFIG_SAE
+ if (params.auth_alg == WPA_AUTH_ALG_SAE) {
+ if (start)
+ resp = sme_auth_build_sae_commit(wpa_s, ssid,
+ bss->bssid);
+ else
+ resp = sme_auth_build_sae_confirm(wpa_s);
+ if (resp == NULL)
+ return;
+ params.sae_data = wpabuf_head(resp);
+ params.sae_data_len = wpabuf_len(resp);
+ wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
}
-#endif /* CONFIG_INTERWORKING */
+#endif /* CONFIG_SAE */
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_cancel_scan(wpa_s);
"driver failed");
wpas_connection_failed(wpa_s, bss->bssid);
wpa_supplicant_mark_disassoc(wpa_s);
+ wpabuf_free(resp);
return;
}
* Association will be started based on the authentication event from
* the driver.
*/
+
+ wpabuf_free(resp);
}
+void sme_authenticate(struct wpa_supplicant *wpa_s,
+ struct wpa_bss *bss, struct wpa_ssid *ssid)
+{
+#ifdef CONFIG_SAE
+ wpa_s->sme.sae.state = SAE_NOTHING;
+ wpa_s->sme.sae.send_confirm = 0;
+#endif /* CONFIG_SAE */
+ sme_send_authentication(wpa_s, bss, ssid, 1);
+}
+
+
+#ifdef CONFIG_SAE
+
+static int sme_sae_auth(struct wpa_supplicant *wpa_s, u16 auth_transaction,
+ u16 status_code, const u8 *data, size_t len)
+{
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE authentication transaction %u "
+ "status code %u", auth_transaction, status_code);
+
+ if (auth_transaction == 1 &&
+ status_code == WLAN_STATUS_ANTI_CLOGGING_TOKEN_REQ &&
+ wpa_s->sme.sae.state == SAE_COMMITTED &&
+ wpa_s->current_bss && wpa_s->current_ssid) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE anti-clogging token "
+ "requested");
+ wpabuf_free(wpa_s->sme.sae_token);
+ wpa_s->sme.sae_token = wpabuf_alloc_copy(data, len);
+ sme_send_authentication(wpa_s, wpa_s->current_bss,
+ wpa_s->current_ssid, 1);
+ return 0;
+ }
+
+ if (auth_transaction == 1 &&
+ status_code == WLAN_STATUS_FINITE_CYCLIC_GROUP_NOT_SUPPORTED &&
+ wpa_s->sme.sae.state == SAE_COMMITTED &&
+ wpa_s->current_bss && wpa_s->current_ssid) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME: SAE group not supported");
+ wpa_s->sme.sae_group_index++;
+ if (sme_set_sae_group(wpa_s) < 0)
+ return -1; /* no other groups enabled */
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME: Try next enabled SAE group");
+ sme_send_authentication(wpa_s, wpa_s->current_bss,
+ wpa_s->current_ssid, 1);
+ return 0;
+ }
+
+ if (status_code != WLAN_STATUS_SUCCESS)
+ return -1;
+
+ if (auth_transaction == 1) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE commit");
+ if (wpa_s->current_bss == NULL ||
+ wpa_s->current_ssid == NULL)
+ return -1;
+ if (wpa_s->sme.sae.state != SAE_COMMITTED)
+ return -1;
+ if (sae_parse_commit(&wpa_s->sme.sae, data, len, NULL, NULL,
+ wpa_s->conf->sae_groups) !=
+ WLAN_STATUS_SUCCESS)
+ return -1;
+
+ if (sae_process_commit(&wpa_s->sme.sae) < 0) {
+ wpa_printf(MSG_DEBUG, "SAE: Failed to process peer "
+ "commit");
+ return -1;
+ }
+
+ wpabuf_free(wpa_s->sme.sae_token);
+ wpa_s->sme.sae_token = NULL;
+ sme_send_authentication(wpa_s, wpa_s->current_bss,
+ wpa_s->current_ssid, 0);
+ return 0;
+ } else if (auth_transaction == 2) {
+ wpa_dbg(wpa_s, MSG_DEBUG, "SME SAE confirm");
+ if (wpa_s->sme.sae.state != SAE_CONFIRMED)
+ return -1;
+ if (sae_check_confirm(&wpa_s->sme.sae, data, len) < 0)
+ return -1;
+ wpa_s->sme.sae.state = SAE_ACCEPTED;
+ sae_clear_temp_data(&wpa_s->sme.sae);
+ return 1;
+ }
+
+ return -1;
+}
+#endif /* CONFIG_SAE */
+
+
void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
{
struct wpa_ssid *ssid = wpa_s->current_ssid;
}
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
- " auth_type=%d status_code=%d",
+ " auth_type=%d auth_transaction=%d status_code=%d",
MAC2STR(data->auth.peer), data->auth.auth_type,
- data->auth.status_code);
+ data->auth.auth_transaction, data->auth.status_code);
wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
data->auth.ies, data->auth.ies_len);
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
+#ifdef CONFIG_SAE
+ if (data->auth.auth_type == WLAN_AUTH_SAE) {
+ int res;
+ res = sme_sae_auth(wpa_s, data->auth.auth_transaction,
+ data->auth.status_code, data->auth.ies,
+ data->auth.ies_len);
+ if (res < 0) {
+ wpas_connection_failed(wpa_s, wpa_s->pending_bssid);
+ wpa_supplicant_set_state(wpa_s, WPA_DISCONNECTED);
+
+ }
+ if (res != 1)
+ return;
+
+ wpa_printf(MSG_DEBUG, "SME: SAE completed - setting PMK for "
+ "4-way handshake");
+ wpa_sm_set_pmk(wpa_s->wpa, wpa_s->sme.sae.pmk, PMK_LEN);
+ }
+#endif /* CONFIG_SAE */
+
if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Authentication failed (status "
"code %d)", data->auth.status_code);
params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
wpa_s->sme.assoc_req_ie : NULL;
params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
- params.pairwise_suite = cipher_suite2driver(wpa_s->pairwise_cipher);
- params.group_suite = cipher_suite2driver(wpa_s->group_cipher);
+ params.pairwise_suite =
+ wpa_cipher_to_suite_driver(wpa_s->pairwise_cipher);
+ params.group_suite = wpa_cipher_to_suite_driver(wpa_s->group_cipher);
#ifdef CONFIG_HT_OVERRIDES
os_memset(&htcaps, 0, sizeof(htcaps));
os_memset(&htcaps_mask, 0, sizeof(htcaps_mask));
#ifdef CONFIG_IEEE80211W
sme_stop_sa_query(wpa_s);
#endif /* CONFIG_IEEE80211W */
+#ifdef CONFIG_SAE
+ wpabuf_free(wpa_s->sme.sae_token);
+ wpa_s->sme.sae_token = NULL;
+ sae_clear_data(&wpa_s->sme.sae);
+#endif /* CONFIG_SAE */
eloop_cancel_timeout(sme_assoc_timer, wpa_s, NULL);
eloop_cancel_timeout(sme_auth_timer, wpa_s, NULL);
if (!enable)
return;
- if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) || ssid == NULL ||
- ssid->mode != IEEE80211_MODE_INFRA)
- return; /* Not using station SME in wpa_supplicant */
+ /*
+ * Schedule OBSS scan if driver is using station SME in wpa_supplicant
+ * or it expects OBSS scan to be performed by wpa_supplicant.
+ */
+ if (!((wpa_s->drv_flags & WPA_DRIVER_FLAGS_SME) ||
+ (wpa_s->drv_flags & WPA_DRIVER_FLAGS_OBSS_SCAN)) ||
+ ssid == NULL || ssid->mode != IEEE80211_MODE_INFRA)
+ return;
if (!wpa_s->hw.modes)
return;
if (wpa_s->wpa_state != WPA_COMPLETED)
return;
ssid = wpa_s->current_ssid;
- if (ssid == NULL || ssid->ieee80211w == 0)
+ if (ssid == NULL ||
+ (ssid->ieee80211w == MGMT_FRAME_PROTECTION_DEFAULT ?
+ wpa_s->conf->pmf : ssid->ieee80211w) == NO_MGMT_FRAME_PROTECTION)
return;
if (os_memcmp(sa, wpa_s->bssid, ETH_ALEN) != 0)
return;
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