3 * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
18 #include "ieee802_11_defs.h"
19 #include "eapol_supp/eapol_supp_sm.h"
20 #include "wpa_common.h"
22 #include "pmksa_cache.h"
24 #include "wpa_supplicant_i.h"
26 #include "wpas_glue.h"
27 #include "wps_supplicant.h"
30 void sme_authenticate(struct wpa_supplicant *wpa_s,
31 struct wpa_scan_res *bss, struct wpa_ssid *ssid)
33 struct wpa_driver_auth_params params;
35 #ifdef CONFIG_IEEE80211R
37 #endif /* CONFIG_IEEE80211R */
40 wpa_printf(MSG_ERROR, "SME: No scan result available for the "
45 os_memset(¶ms, 0, sizeof(params));
46 wpa_s->reassociate = 0;
48 params.freq = bss->freq;
49 params.bssid = bss->bssid;
50 ie = wpa_scan_get_ie(bss, WLAN_EID_SSID);
52 wpa_printf(MSG_ERROR, "SME: SSID not available for the BSS");
56 params.ssid_len = ie[1];
58 wpa_s->sme.freq = params.freq;
59 os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
60 wpa_s->sme.ssid_len = params.ssid_len;
62 params.auth_alg = AUTH_ALG_OPEN_SYSTEM;
63 #ifdef IEEE8021X_EAPOL
64 if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
66 if (ssid->non_leap == 0)
67 params.auth_alg = AUTH_ALG_LEAP;
69 params.auth_alg |= AUTH_ALG_LEAP;
72 #endif /* IEEE8021X_EAPOL */
73 wpa_printf(MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
77 if (ssid->auth_alg & WPA_AUTH_ALG_OPEN)
78 params.auth_alg |= AUTH_ALG_OPEN_SYSTEM;
79 if (ssid->auth_alg & WPA_AUTH_ALG_SHARED)
80 params.auth_alg |= AUTH_ALG_SHARED_KEY;
81 if (ssid->auth_alg & WPA_AUTH_ALG_LEAP)
82 params.auth_alg |= AUTH_ALG_LEAP;
83 wpa_printf(MSG_DEBUG, "Overriding auth_alg selection: 0x%x",
87 os_memset(wpa_s->bssid, 0, ETH_ALEN);
88 os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
90 if (bss && (wpa_scan_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
91 wpa_scan_get_ie(bss, WLAN_EID_RSN)) &&
92 (ssid->key_mgmt & (WPA_KEY_MGMT_IEEE8021X | WPA_KEY_MGMT_PSK |
93 WPA_KEY_MGMT_FT_IEEE8021X |
95 WPA_KEY_MGMT_IEEE8021X_SHA256 |
96 WPA_KEY_MGMT_PSK_SHA256))) {
97 int try_opportunistic;
98 try_opportunistic = ssid->proactive_key_caching &&
99 (ssid->proto & WPA_PROTO_RSN);
100 if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
102 try_opportunistic) == 0)
103 eapol_sm_notify_pmkid_attempt(wpa_s->eapol, 1);
104 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
105 if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
106 wpa_s->sme.assoc_req_ie,
107 &wpa_s->sme.assoc_req_ie_len)) {
108 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
109 "management and encryption suites");
112 } else if (ssid->key_mgmt &
113 (WPA_KEY_MGMT_PSK | WPA_KEY_MGMT_IEEE8021X |
114 WPA_KEY_MGMT_WPA_NONE | WPA_KEY_MGMT_FT_PSK |
115 WPA_KEY_MGMT_FT_IEEE8021X | WPA_KEY_MGMT_PSK_SHA256 |
116 WPA_KEY_MGMT_IEEE8021X_SHA256)) {
117 wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
118 if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
119 wpa_s->sme.assoc_req_ie,
120 &wpa_s->sme.assoc_req_ie_len)) {
121 wpa_printf(MSG_WARNING, "SME: Failed to set WPA key "
122 "management and encryption suites (no scan "
127 } else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
128 struct wpabuf *wps_ie;
129 wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
130 if (wps_ie && wpabuf_len(wps_ie) <=
131 sizeof(wpa_s->sme.assoc_req_ie)) {
132 wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
133 os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
134 wpa_s->sme.assoc_req_ie_len);
136 wpa_s->sme.assoc_req_ie_len = 0;
138 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
139 #endif /* CONFIG_WPS */
141 wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
142 wpa_s->sme.assoc_req_ie_len = 0;
145 #ifdef CONFIG_IEEE80211R
146 ie = wpa_scan_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
147 if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
149 wpa_sm_set_ft_params(wpa_s->wpa, md, NULL, 0, NULL);
151 /* Prepare for the next transition */
152 wpa_ft_prepare_auth_request(wpa_s->wpa);
155 if (md && ssid->key_mgmt & (WPA_KEY_MGMT_FT_PSK |
156 WPA_KEY_MGMT_FT_IEEE8021X)) {
157 if (wpa_s->sme.assoc_req_ie_len + 5 <
158 sizeof(wpa_s->sme.assoc_req_ie)) {
159 struct rsn_mdie *mdie;
160 u8 *pos = wpa_s->sme.assoc_req_ie +
161 wpa_s->sme.assoc_req_ie_len;
162 *pos++ = WLAN_EID_MOBILITY_DOMAIN;
163 *pos++ = sizeof(*mdie);
164 mdie = (struct rsn_mdie *) pos;
165 os_memcpy(mdie->mobility_domain, md,
166 MOBILITY_DOMAIN_ID_LEN);
168 wpa_s->sme.assoc_req_ie_len += 5;
171 if (wpa_s->sme.ft_used &&
172 os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0) {
173 wpa_printf(MSG_DEBUG, "SME: Trying to use FT "
175 params.auth_alg = AUTH_ALG_FT;
176 params.ie = wpa_s->sme.ft_ies;
177 params.ie_len = wpa_s->sme.ft_ies_len;
180 #endif /* CONFIG_IEEE80211R */
182 #ifdef CONFIG_IEEE80211W
183 switch (ssid->ieee80211w) {
185 wpa_s->sme.mfp = NO_MGMT_FRAME_PROTECTION;
187 case IEEE80211W_OPTIONAL:
188 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_OPTIONAL;
190 case IEEE80211W_REQUIRED:
191 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
194 if (ssid->ieee80211w != NO_IEEE80211W && bss) {
195 const u8 *rsn = wpa_scan_get_ie(bss, WLAN_EID_RSN);
196 struct wpa_ie_data _ie;
197 if (rsn && wpa_parse_wpa_ie(rsn, 2 + rsn[1], &_ie) == 0 &&
199 (WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
200 wpa_printf(MSG_DEBUG, "WPA: Selected AP supports MFP: "
202 wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
205 #endif /* CONFIG_IEEE80211W */
207 wpa_supplicant_cancel_scan(wpa_s);
209 wpa_msg(wpa_s, MSG_INFO, "Trying to authenticate with " MACSTR
210 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
211 wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
213 wpa_clear_keys(wpa_s, bss->bssid);
214 wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
215 wpa_s->current_ssid = ssid;
216 wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
217 wpa_supplicant_initiate_eapol(wpa_s);
219 if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
220 wpa_msg(wpa_s, MSG_INFO, "Authentication request to the "
225 /* TODO: add timeout on authentication */
228 * Association will be started based on the authentication event from
234 void sme_event_auth(struct wpa_supplicant *wpa_s, union wpa_event_data *data)
236 struct wpa_driver_associate_params params;
237 struct wpa_ssid *ssid = wpa_s->current_ssid;
240 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
241 "network is not selected");
245 if (wpa_s->wpa_state != WPA_AUTHENTICATING) {
246 wpa_printf(MSG_DEBUG, "SME: Ignore authentication event when "
247 "not in authenticating state");
251 if (os_memcmp(wpa_s->pending_bssid, data->auth.peer, ETH_ALEN) != 0) {
252 wpa_printf(MSG_DEBUG, "SME: Ignore authentication with "
253 "unexpected peer " MACSTR,
254 MAC2STR(data->auth.peer));
258 wpa_printf(MSG_DEBUG, "SME: Authentication response: peer=" MACSTR
259 " auth_type=%d status_code=%d",
260 MAC2STR(data->auth.peer), data->auth.auth_type,
261 data->auth.status_code);
262 wpa_hexdump(MSG_MSGDUMP, "SME: Authentication response IEs",
263 data->auth.ies, data->auth.ies_len);
265 if (data->auth.status_code != WLAN_STATUS_SUCCESS) {
266 wpa_printf(MSG_DEBUG, "SME: Authentication failed (status "
267 "code %d)", data->auth.status_code);
271 #ifdef CONFIG_IEEE80211R
272 if (data->auth.auth_type == WLAN_AUTH_FT) {
273 union wpa_event_data edata;
274 os_memset(&edata, 0, sizeof(edata));
275 edata.ft_ies.ies = data->auth.ies;
276 edata.ft_ies.ies_len = data->auth.ies_len;
277 os_memcpy(edata.ft_ies.target_ap, data->auth.peer, ETH_ALEN);
278 wpa_supplicant_event(wpa_s, EVENT_FT_RESPONSE, &edata);
280 #endif /* CONFIG_IEEE80211R */
282 os_memset(¶ms, 0, sizeof(params));
283 params.bssid = data->auth.peer;
284 params.ssid = wpa_s->sme.ssid;
285 params.ssid_len = wpa_s->sme.ssid_len;
286 params.freq = wpa_s->sme.freq;
287 params.wpa_ie = wpa_s->sme.assoc_req_ie_len ?
288 wpa_s->sme.assoc_req_ie : NULL;
289 params.wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
290 #ifdef CONFIG_IEEE80211R
291 if (data->auth.auth_type == WLAN_AUTH_FT && wpa_s->sme.ft_ies) {
292 params.wpa_ie = wpa_s->sme.ft_ies;
293 params.wpa_ie_len = wpa_s->sme.ft_ies_len;
295 #endif /* CONFIG_IEEE80211R */
296 params.mode = ssid->mode;
297 params.mgmt_frame_protection = wpa_s->sme.mfp;
299 wpa_msg(wpa_s, MSG_INFO, "Trying to associate with " MACSTR
300 " (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
301 params.ssid ? wpa_ssid_txt(params.ssid, params.ssid_len) : "",
304 wpa_supplicant_set_state(wpa_s, WPA_ASSOCIATING);
306 if (wpa_drv_associate(wpa_s, ¶ms) < 0) {
307 wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
312 /* TODO: add timeout on association */
316 int sme_update_ft_ies(struct wpa_supplicant *wpa_s, const u8 *md,
317 const u8 *ies, size_t ies_len)
319 if (md == NULL || ies == NULL) {
320 wpa_printf(MSG_DEBUG, "SME: Remove mobility domain");
321 os_free(wpa_s->sme.ft_ies);
322 wpa_s->sme.ft_ies = NULL;
323 wpa_s->sme.ft_ies_len = 0;
324 wpa_s->sme.ft_used = 0;
328 os_memcpy(wpa_s->sme.mobility_domain, md, MOBILITY_DOMAIN_ID_LEN);
329 wpa_hexdump(MSG_DEBUG, "SME: FT IEs", ies, ies_len);
330 os_free(wpa_s->sme.ft_ies);
331 wpa_s->sme.ft_ies = os_malloc(ies_len);
332 if (wpa_s->sme.ft_ies == NULL)
334 os_memcpy(wpa_s->sme.ft_ies, ies, ies_len);
335 wpa_s->sme.ft_ies_len = ies_len;