338 lines
10 KiB
C
338 lines
10 KiB
C
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/*
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* wpa_supplicant - SME
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* Alternatively, this software may be distributed under the terms of BSD
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* license.
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*
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* See README and COPYING for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "drivers/driver.h"
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#include "ieee802_11_defs.h"
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#include "eapol_supp/eapol_supp_sm.h"
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#include "wpa_common.h"
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#include "wpa.h"
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#include "pmksa_cache.h"
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#include "config.h"
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#include "wpa_supplicant_i.h"
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#include "wpas_glue.h"
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#include "wps_supplicant.h"
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#include "sme.h"
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void sme_authenticate(struct wpa_supplicant *wpa_s,
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struct wpa_scan_res *bss, struct wpa_ssid *ssid)
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{
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struct wpa_driver_auth_params params;
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const u8 *ie;
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#ifdef CONFIG_IEEE80211R
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const u8 *md = NULL;
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#endif /* CONFIG_IEEE80211R */
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if (bss == NULL) {
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wpa_printf(MSG_ERROR, "SME: No scan result available for the "
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"network");
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return;
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}
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os_memset(¶ms, 0, sizeof(params));
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wpa_s->reassociate = 0;
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params.freq = bss->freq;
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params.bssid = bss->bssid;
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ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
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if (ie == NULL) {
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wpa_printf(MSG_ERROR, "SME: SSID not available for the BSS");
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return;
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}
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params.ssid = ie + 2;
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params.ssid_len = ie[1];
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wpa_s->sme.freq = params.freq;
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os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
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wpa_s->sme.ssid_len = params.ssid_len;
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params.auth_alg = AUTH_ALG_OPEN_SYSTEM;
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#ifdef IEEE8021X_EAPOL
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if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
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if (ssid->leap) {
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if (ssid->non_leap == 0)
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params.auth_alg = AUTH_ALG_LEAP;
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else
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params.auth_alg |= AUTH_ALG_LEAP;
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}
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}
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#endif /* IEEE8021X_EAPOL */
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wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
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params.auth_alg);
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if (ssid->auth_alg) {
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params.auth_alg = 0;
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if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
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params.auth_alg |= AUTH_ALG_OPEN_SYSTEM;
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if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
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params.auth_alg |= AUTH_ALG_SHARED_KEY;
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if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
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params.auth_alg |= AUTH_ALG_LEAP;
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wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
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params.auth_alg);
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}
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os_memset(wpa_s->bssid, 0, ETH_ALEN);
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os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
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if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
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wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
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(ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X |
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WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_IEEE8021X_SHA256 |
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WPA_KEY_MGMT_PSK_SHA256))) {
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int try_opportunistic;
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try_opportunistic = ssid->proactive_key_caching &&
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(ssid->proto & WPA_PROTO_RSN);
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if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
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wpa_s->current_ssid,
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try_opportunistic) == 0)
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eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
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wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
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if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
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wpa_s->sme.assoc_req_ie,
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&wpa_s->sme.assoc_req_ie_len)) {
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wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
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"management and encryption suites");
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return;
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}
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} else if (ssid->key_mgmt &
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(WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
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WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
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WPA_KEY_MGMT_IEEE8021X_SHA256)) {
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wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
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if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
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wpa_s->sme.assoc_req_ie,
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&wpa_s->sme.assoc_req_ie_len)) {
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wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
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"management and encryption suites (no scan "
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"results)");
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return;
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}
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#ifdef CONFIG_WPS
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} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
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struct wpabuf *wps_ie;
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wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
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if (wps_ie && wpabuf_len(wps_ie) <=
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sizeof(wpa_s->sme.assoc_req_ie)) {
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wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
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os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
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wpa_s->sme.assoc_req_ie_len);
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} else
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wpa_s->sme.assoc_req_ie_len = 0;
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wpabuf_free(wps_ie);
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wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
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#endif /* CONFIG_WPS */
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} else {
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wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
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wpa_s->sme.assoc_req_ie_len = 0;
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}
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#ifdef CONFIG_IEEE80211R
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ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
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if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
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md = ie + 2;
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wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
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if (md) {
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/* Prepare for the next transition */
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wpa_ft_prepare_auth_request(wpa_s->wpa);
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}
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if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
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WPA_KEY_MGMT_FT_IEEE8021X)) {
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if (wpa_s->sme.assoc_req_ie_len + 5 <
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sizeof(wpa_s->sme.assoc_req_ie)) {
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struct rsn_mdie *mdie;
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u8 *pos = wpa_s->sme.assoc_req_ie +
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wpa_s->sme.assoc_req_ie_len;
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*pos++ = WLAN_EID_MOBILITY_DOMAIN;
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*pos++ = sizeof(*mdie);
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mdie = (struct rsn_mdie *) pos;
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os_memcpy(mdie->mobility_domain, md,
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MOBILITY_DOMAIN_ID_LEN);
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mdie->ft_capab = 0;
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wpa_s->sme.assoc_req_ie_len += 5;
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}
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if (wpa_s->sme.ft_used &&
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os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
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wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
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"over-the-air");
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params.auth_alg = AUTH_ALG_FT;
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params.ie = wpa_s->sme.ft_ies;
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params.ie_len = wpa_s->sme.ft_ies_len;
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}
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}
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#endif /* CONFIG_IEEE80211R */
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#ifdef CONFIG_IEEE80211W
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switch (ssid->ieee80211w) {
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case NO_IEEE80211W:
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wpa_s->sme.mfp = NO_MGMT_FRAME_PROTECTION;
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break;
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case IEEE80211W_OPTIONAL:
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wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_OPTIONAL;
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break;
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case IEEE80211W_REQUIRED:
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wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
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break;
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}
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if (ssid->ieee80211w != NO_IEEE80211W && bss) {
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const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
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struct wpa_ie_data _ie;
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if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
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_ie.capabilities &
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(WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
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wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
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"require MFP");
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wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
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}
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}
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#endif /* CONFIG_IEEE80211W */
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wpa_supplicant_cancel_scan(wpa_s);
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wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
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" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
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wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
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wpa_clear_keys(wpa_s, bss->bssid);
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wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
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wpa_s->current_ssid = ssid;
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wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
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wpa_supplicant_initiate_eapol(wpa_s);
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if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
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wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
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"driver failed");
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return;
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}
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/* TODO: add timeout on authentication */
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/*
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* Association will be started based on the authentication event from
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* the driver.
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*/
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}
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void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
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{
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struct wpa_driver_associate_params params;
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struct wpa_ssid *ssid = wpa_s->current_ssid;
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if (ssid == NULL) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
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"network is not selected");
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return;
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}
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if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
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"not in authenticating state");
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return;
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}
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if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
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wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
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"unexpected peer " MACSTR,
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MAC2STR(data->auth.peer));
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return;
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}
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wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
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" auth_type=%d status_code=%d",
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MAC2STR(data->auth.peer), data->auth.auth_type,
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data->auth.status_code);
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wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
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data->auth.ies, data->auth.ies_len);
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if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
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wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
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"code %d)", data->auth.status_code);
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return;
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}
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#ifdef CONFIG_IEEE80211R
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if (data->auth.auth_type == WLAN_AUTH_FT) {
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union wpa_event_data edata;
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os_memset(&edata, 0, sizeof(edata));
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edata.ft_ies.ies = data->auth.ies;
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edata.ft_ies.ies_len = data->auth.ies_len;
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os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
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wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
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}
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#endif /* CONFIG_IEEE80211R */
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os_memset(¶ms, 0, sizeof(params));
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params.bssid = data->auth.peer;
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params.ssid = wpa_s->sme.ssid;
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params.ssid_len = wpa_s->sme.ssid_len;
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params.freq = wpa_s->sme.freq;
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params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
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wpa_s->sme.assoc_req_ie : NULL;
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params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
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#ifdef CONFIG_IEEE80211R
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if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
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params.wpa_ie = wpa_s->sme.ft_ies;
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params.wpa_ie_len = wpa_s->sme.ft_ies_len;
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}
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#endif /* CONFIG_IEEE80211R */
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params.mode = ssid->mode;
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params.mgmt_frame_protection = wpa_s->sme.mfp;
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wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
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" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
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params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
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params.freq);
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wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
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if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
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wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
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"failed");
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return;
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}
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/* TODO: add timeout on association */
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}
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int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
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const u8 *ies, size_t ies_len)
|
||
|
|
{
|
||
|
|
if (md == NULL || ies == NULL) {
|
||
|
|
wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
|
||
|
|
os_free(wpa_s->sme.ft_ies);
|
||
|
|
wpa_s->sme.ft_ies = NULL;
|
||
|
|
wpa_s->sme.ft_ies_len = 0;
|
||
|
|
wpa_s->sme.ft_used = 0;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
|
||
|
|
wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
|
||
|
|
os_free(wpa_s->sme.ft_ies);
|
||
|
|
wpa_s->sme.ft_ies = os_malloc(ies_len);
|
||
|
|
if (wpa_s->sme.ft_ies == NULL)
|
||
|
|
return -1;
|
||
|
|
os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
|
||
|
|
wpa_s->sme.ft_ies_len = ies_len;
|
||
|
|
return 0;
|
||
|
|
}
|