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sme.c
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sme.c
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/*
* wpa_supplicant - SME
* Copyright (c) 2009-2014, Jouni Malinen <[email protected]>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "includes.h"
#include "common.h"
#include "utils/eloop.h"
#include "common/ieee802_11_defs.h"
#include "common/ieee802_11_common.h"
#include "common/ocv.h"
#include "eapol_supp/eapol_supp_sm.h"
#include "common/wpa_common.h"
#include "common/sae.h"
#include "common/dpp.h"
#include "rsn_supp/wpa.h"
#include "rsn_supp/pmksa_cache.h"
#include "config.h"
#include "wpa_supplicant_i.h"
#include "driver_i.h"
#include "wpas_glue.h"
#include "wps_supplicant.h"
#include "p2p_supplicant.h"
#include "notify.h"
#include "bss.h"
#include "scan.h"
#include "sme.h"
#include "hs20_supplicant.h"
#define SME_AUTH_TIMEOUT 5
#define SME_ASSOC_TIMEOUT 5
static void sme_auth_timer(void *eloop_ctx, void *timeout_ctx);
static void sme_assoc_timer(void *eloop_ctx, void *timeout_ctx);
static void sme_obss_scan_timeout(void *eloop_ctx, void *timeout_ctx);
static void sme_stop_sa_query(struct wpa_supplicant *wpa_s);
#ifdef CONFIG_SAE
static int index_within_array(const int *array, int idx)
{
int i;
for (i = 0; i < idx; i++) {
if (array[i] <= 0)
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, 0 };
if (!groups || groups[0] <= 0)
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, int external,
int reuse, int *ret_use_pt,
bool *ret_use_pk)
{
struct wpabuf *buf;
size_t len;
const char *password;
struct wpa_bss *bss;
int use_pt = 0;
bool use_pk = false;
u8 rsnxe_capa = 0;
if (ret_use_pt)
*ret_use_pt = 0;
if (ret_use_pk)
*ret_use_pk = false;
#ifdef CONFIG_TESTING_OPTIONS
if (wpa_s->sae_commit_override) {
wpa_printf(MSG_DEBUG, "SAE: TESTING - commit override");
buf = wpabuf_alloc(4 + wpabuf_len(wpa_s->sae_commit_override));
if (!buf)
return NULL;
if (!external) {
wpabuf_put_le16(buf, 1); /* Transaction seq# */
wpabuf_put_le16(buf, WLAN_STATUS_SUCCESS);
}
wpabuf_put_buf(buf, wpa_s->sae_commit_override);
return buf;
}
#endif /* CONFIG_TESTING_OPTIONS */
password = ssid->sae_password;
if (!password)
password = ssid->passphrase;
if (!password) {
wpa_printf(MSG_DEBUG, "SAE: No password available");
return NULL;
}
if (reuse && wpa_s->sme.sae.tmp &&
os_memcmp(bssid, wpa_s->sme.sae.tmp->bssid, ETH_ALEN) == 0) {
wpa_printf(MSG_DEBUG,
"SAE: Reuse previously generated PWE on a retry with the same AP");
use_pt = wpa_s->sme.sae.h2e;
use_pk = wpa_s->sme.sae.pk;
goto reuse_data;
}
if (sme_set_sae_group(wpa_s) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Failed to select group");
return NULL;
}
bss = wpa_bss_get_bssid_latest(wpa_s, bssid);
if (!bss) {
wpa_printf(MSG_DEBUG,
"SAE: BSS not available, update scan result to get BSS");
wpa_supplicant_update_scan_results(wpa_s);
bss = wpa_bss_get_bssid_latest(wpa_s, bssid);
}
if (bss) {
const u8 *rsnxe;
rsnxe = wpa_bss_get_ie(bss, WLAN_EID_RSNX);
if (rsnxe && rsnxe[1] >= 1)
rsnxe_capa = rsnxe[2];
}
if (ssid->sae_password_id && wpa_s->conf->sae_pwe != 3)
use_pt = 1;
#ifdef CONFIG_SAE_PK
if ((rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_PK)) &&
ssid->sae_pk != SAE_PK_MODE_DISABLED &&
((ssid->sae_password &&
sae_pk_valid_password(ssid->sae_password)) ||
(!ssid->sae_password && ssid->passphrase &&
sae_pk_valid_password(ssid->passphrase)))) {
use_pt = 1;
use_pk = true;
}
if (ssid->sae_pk == SAE_PK_MODE_ONLY && !use_pk) {
wpa_printf(MSG_DEBUG,
"SAE: Cannot use PK with the selected AP");
return NULL;
}
#endif /* CONFIG_SAE_PK */
if (use_pt || wpa_s->conf->sae_pwe == 1 || wpa_s->conf->sae_pwe == 2) {
use_pt = !!(rsnxe_capa & BIT(WLAN_RSNX_CAPAB_SAE_H2E));
if ((wpa_s->conf->sae_pwe == 1 || ssid->sae_password_id) &&
wpa_s->conf->sae_pwe != 3 &&
!use_pt) {
wpa_printf(MSG_DEBUG,
"SAE: Cannot use H2E with the selected AP");
return NULL;
}
}
if (use_pt &&
sae_prepare_commit_pt(&wpa_s->sme.sae, ssid->pt,
wpa_s->own_addr, bssid,
wpa_s->sme.sae_rejected_groups, NULL) < 0)
return NULL;
if (!use_pt &&
sae_prepare_commit(wpa_s->own_addr, bssid,
(u8 *) password, os_strlen(password),
&wpa_s->sme.sae) < 0) {
wpa_printf(MSG_DEBUG, "SAE: Could not pick PWE");
return NULL;
}
if (wpa_s->sme.sae.tmp) {
os_memcpy(wpa_s->sme.sae.tmp->bssid, bssid, ETH_ALEN);
if (use_pt && use_pk)
wpa_s->sme.sae.pk = 1;
#ifdef CONFIG_SAE_PK
os_memcpy(wpa_s->sme.sae.tmp->own_addr, wpa_s->own_addr,
ETH_ALEN);
os_memcpy(wpa_s->sme.sae.tmp->peer_addr, bssid, ETH_ALEN);
sae_pk_set_password(&wpa_s->sme.sae, password);
#endif /* CONFIG_SAE_PK */
}
reuse_data:
len = wpa_s->sme.sae_token ? 3 + wpabuf_len(wpa_s->sme.sae_token) : 0;
if (ssid->sae_password_id)
len += 4 + os_strlen(ssid->sae_password_id);
buf = wpabuf_alloc(4 + SAE_COMMIT_MAX_LEN + len);
if (buf == NULL)
return NULL;
if (!external) {
wpabuf_put_le16(buf, 1); /* Transaction seq# */
if (use_pk)
wpabuf_put_le16(buf, WLAN_STATUS_SAE_PK);
else if (use_pt)
wpabuf_put_le16(buf, WLAN_STATUS_SAE_HASH_TO_ELEMENT);
else
wpabuf_put_le16(buf,WLAN_STATUS_SUCCESS);
}
if (sae_write_commit(&wpa_s->sme.sae, buf, wpa_s->sme.sae_token,
ssid->sae_password_id) < 0) {
wpabuf_free(buf);
return NULL;
}
if (ret_use_pt)
*ret_use_pt = use_pt;
if (ret_use_pk)
*ret_use_pk = use_pk;
return buf;
}
static struct wpabuf * sme_auth_build_sae_confirm(struct wpa_supplicant *wpa_s,
int external)
{
struct wpabuf *buf;
buf = wpabuf_alloc(4 + SAE_CONFIRM_MAX_LEN);
if (buf == NULL)
return NULL;
if (!external) {
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 */
/**
* sme_auth_handle_rrm - Handle RRM aspects of current authentication attempt
* @wpa_s: Pointer to wpa_supplicant data
* @bss: Pointer to the bss which is the target of authentication attempt
*/
static void sme_auth_handle_rrm(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss)
{
const u8 rrm_ie_len = 5;
u8 *pos;
const u8 *rrm_ie;
wpa_s->rrm.rrm_used = 0;
wpa_printf(MSG_DEBUG,
"RRM: Determining whether RRM can be used - device support: 0x%x",
wpa_s->drv_rrm_flags);
rrm_ie = wpa_bss_get_ie(bss, WLAN_EID_RRM_ENABLED_CAPABILITIES);
if (!rrm_ie || !(bss->caps & IEEE80211_CAP_RRM)) {
wpa_printf(MSG_DEBUG, "RRM: No RRM in network");
return;
}
if (!((wpa_s->drv_rrm_flags &
WPA_DRIVER_FLAGS_DS_PARAM_SET_IE_IN_PROBES) &&
(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_QUIET)) &&
!(wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_SUPPORT_RRM)) {
wpa_printf(MSG_DEBUG,
"RRM: Insufficient RRM support in driver - do not use RRM");
return;
}
if (sizeof(wpa_s->sme.assoc_req_ie) <
wpa_s->sme.assoc_req_ie_len + rrm_ie_len + 2) {
wpa_printf(MSG_INFO,
"RRM: Unable to use RRM, no room for RRM IE");
return;
}
wpa_printf(MSG_DEBUG, "RRM: Adding RRM IE to Association Request");
pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
os_memset(pos, 0, 2 + rrm_ie_len);
*pos++ = WLAN_EID_RRM_ENABLED_CAPABILITIES;
*pos++ = rrm_ie_len;
/* Set supported capabilities flags */
if (wpa_s->drv_rrm_flags & WPA_DRIVER_FLAGS_TX_POWER_INSERTION)
*pos |= WLAN_RRM_CAPS_LINK_MEASUREMENT;
*pos |= WLAN_RRM_CAPS_BEACON_REPORT_PASSIVE |
WLAN_RRM_CAPS_BEACON_REPORT_ACTIVE |
WLAN_RRM_CAPS_BEACON_REPORT_TABLE;
if (wpa_s->lci)
pos[1] |= WLAN_RRM_CAPS_LCI_MEASUREMENT;
wpa_s->sme.assoc_req_ie_len += rrm_ie_len + 2;
wpa_s->rrm.rrm_used = 1;
}
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;
#ifdef CONFIG_IEEE80211R
const u8 *ie;
#endif /* CONFIG_IEEE80211R */
#if defined(CONFIG_IEEE80211R) || defined(CONFIG_FILS)
const u8 *md = NULL;
#endif /* CONFIG_IEEE80211R || CONFIG_FILS */
int bssid_changed;
struct wpabuf *resp = NULL;
u8 ext_capab[18];
int ext_capab_len;
int skip_auth;
u8 *wpa_ie;
size_t wpa_ie_len;
#ifdef CONFIG_MBO
const u8 *mbo_ie;
#endif /* CONFIG_MBO */
int omit_rsnxe = 0;
if (bss == NULL) {
wpa_msg(wpa_s, MSG_ERROR, "SME: No scan result available for "
"the network");
wpas_connect_work_done(wpa_s);
return;
}
skip_auth = wpa_s->conf->reassoc_same_bss_optim &&
wpa_s->reassoc_same_bss;
wpa_s->current_bss = bss;
os_memset(¶ms, 0, sizeof(params));
wpa_s->reassociate = 0;
params.freq = bss->freq;
params.bssid = bss->bssid;
params.ssid = bss->ssid;
params.ssid_len = bss->ssid_len;
params.p2p = ssid->p2p_group;
if (wpa_s->sme.ssid_len != params.ssid_len ||
os_memcmp(wpa_s->sme.ssid, params.ssid, params.ssid_len) != 0)
wpa_s->sme.prev_bssid_set = 0;
wpa_s->sme.freq = params.freq;
os_memcpy(wpa_s->sme.ssid, params.ssid, params.ssid_len);
wpa_s->sme.ssid_len = params.ssid_len;
params.auth_alg = WPA_AUTH_ALG_OPEN;
#ifdef IEEE8021X_EAPOL
if (ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) {
if (ssid->leap) {
if (ssid->non_leap == 0)
params.auth_alg = WPA_AUTH_ALG_LEAP;
else
params.auth_alg |= WPA_AUTH_ALG_LEAP;
}
}
#endif /* IEEE8021X_EAPOL */
wpa_dbg(wpa_s, MSG_DEBUG, "Automatic auth_alg selection: 0x%x",
params.auth_alg);
if (ssid->auth_alg) {
params.auth_alg = ssid->auth_alg;
wpa_dbg(wpa_s, MSG_DEBUG, "Overriding auth_alg selection: "
"0x%x", params.auth_alg);
}
#ifdef CONFIG_SAE
wpa_s->sme.sae_pmksa_caching = 0;
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_dbg(wpa_s, MSG_DEBUG,
"SAE enabled, but target BSS does not advertise RSN");
#ifdef CONFIG_DPP
} else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
(ssid->key_mgmt & WPA_KEY_MGMT_DPP) &&
(ied.key_mgmt & WPA_KEY_MGMT_DPP)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Prefer DPP over SAE when both are enabled");
#endif /* CONFIG_DPP */
} else if (wpa_parse_wpa_ie(rsn, 2 + rsn[1], &ied) == 0 &&
wpa_key_mgmt_sae(ied.key_mgmt)) {
wpa_dbg(wpa_s, MSG_DEBUG, "Using SAE auth_alg");
params.auth_alg = WPA_AUTH_ALG_SAE;
} else {
wpa_dbg(wpa_s, MSG_DEBUG,
"SAE enabled, but target BSS does not advertise SAE AKM for RSN");
}
}
#endif /* CONFIG_SAE */
#ifdef CONFIG_WEP
{
int i;
for (i = 0; i < NUM_WEP_KEYS; i++) {
if (ssid->wep_key_len[i])
params.wep_key[i] = ssid->wep_key[i];
params.wep_key_len[i] = ssid->wep_key_len[i];
}
params.wep_tx_keyidx = ssid->wep_tx_keyidx;
}
#endif /* CONFIG_WEP */
if ((wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE) ||
wpa_bss_get_ie(bss, WLAN_EID_RSN)) &&
wpa_key_mgmt_wpa(ssid->key_mgmt)) {
int try_opportunistic;
const u8 *cache_id = NULL;
try_opportunistic = (ssid->proactive_key_caching < 0 ?
wpa_s->conf->okc :
ssid->proactive_key_caching) &&
(ssid->proto & WPA_PROTO_RSN);
#ifdef CONFIG_FILS
if (wpa_key_mgmt_fils(ssid->key_mgmt))
cache_id = wpa_bss_get_fils_cache_id(bss);
#endif /* CONFIG_FILS */
if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
wpa_s->current_ssid,
try_opportunistic, cache_id,
0) == 0)
eapol_sm_notify_pmkid_attempt(wpa_s->eapol);
wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
wpa_s->sme.assoc_req_ie,
&wpa_s->sme.assoc_req_ie_len)) {
wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
"key management and encryption suites");
wpas_connect_work_done(wpa_s);
return;
}
#ifdef CONFIG_HS20
} else if (wpa_bss_get_vendor_ie(bss, OSEN_IE_VENDOR_TYPE) &&
(ssid->key_mgmt & WPA_KEY_MGMT_OSEN)) {
/* No PMKSA caching, but otherwise similar to RSN/WPA */
wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
if (wpa_supplicant_set_suites(wpa_s, bss, ssid,
wpa_s->sme.assoc_req_ie,
&wpa_s->sme.assoc_req_ie_len)) {
wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
"key management and encryption suites");
wpas_connect_work_done(wpa_s);
return;
}
#endif /* CONFIG_HS20 */
} else if ((ssid->key_mgmt & WPA_KEY_MGMT_IEEE8021X_NO_WPA) &&
wpa_key_mgmt_wpa_ieee8021x(ssid->key_mgmt)) {
/*
* Both WPA and non-WPA IEEE 802.1X enabled in configuration -
* use non-WPA since the scan results did not indicate that the
* AP is using WPA or WPA2.
*/
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
wpa_s->sme.assoc_req_ie_len = 0;
} else if (wpa_key_mgmt_wpa_any(ssid->key_mgmt)) {
wpa_s->sme.assoc_req_ie_len = sizeof(wpa_s->sme.assoc_req_ie);
if (wpa_supplicant_set_suites(wpa_s, NULL, ssid,
wpa_s->sme.assoc_req_ie,
&wpa_s->sme.assoc_req_ie_len)) {
wpa_msg(wpa_s, MSG_WARNING, "SME: Failed to set WPA "
"key management and encryption suites (no "
"scan results)");
wpas_connect_work_done(wpa_s);
return;
}
#ifdef CONFIG_WPS
} else if (ssid->key_mgmt & WPA_KEY_MGMT_WPS) {
struct wpabuf *wps_ie;
wps_ie = wps_build_assoc_req_ie(wpas_wps_get_req_type(ssid));
if (wps_ie && wpabuf_len(wps_ie) <=
sizeof(wpa_s->sme.assoc_req_ie)) {
wpa_s->sme.assoc_req_ie_len = wpabuf_len(wps_ie);
os_memcpy(wpa_s->sme.assoc_req_ie, wpabuf_head(wps_ie),
wpa_s->sme.assoc_req_ie_len);
} else
wpa_s->sme.assoc_req_ie_len = 0;
wpabuf_free(wps_ie);
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
#endif /* CONFIG_WPS */
} else {
wpa_supplicant_set_non_wpa_policy(wpa_s, ssid);
wpa_s->sme.assoc_req_ie_len = 0;
}
/* In case the WPA vendor IE is used, it should be placed after all the
* non-vendor IEs, as the lower layer expects the IEs to be ordered as
* defined in the standard. Store the WPA IE so it can later be
* inserted at the correct location.
*/
wpa_ie = NULL;
wpa_ie_len = 0;
if (wpa_s->wpa_proto == WPA_PROTO_WPA) {
wpa_ie = os_memdup(wpa_s->sme.assoc_req_ie,
wpa_s->sme.assoc_req_ie_len);
if (wpa_ie) {
wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Storing WPA IE");
wpa_ie_len = wpa_s->sme.assoc_req_ie_len;
wpa_s->sme.assoc_req_ie_len = 0;
} else {
wpa_msg(wpa_s, MSG_WARNING, "WPA: Failed copy WPA IE");
wpas_connect_work_done(wpa_s);
return;
}
}
#ifdef CONFIG_IEEE80211R
ie = wpa_bss_get_ie(bss, WLAN_EID_MOBILITY_DOMAIN);
if (ie && ie[1] >= MOBILITY_DOMAIN_ID_LEN)
md = ie + 2;
wpa_sm_set_ft_params(wpa_s->wpa, ie, ie ? 2 + ie[1] : 0);
if (md && (!wpa_key_mgmt_ft(ssid->key_mgmt) ||
!wpa_key_mgmt_ft(wpa_s->key_mgmt)))
md = NULL;
if (md) {
/* Prepare for the next transition */
wpa_ft_prepare_auth_request(wpa_s->wpa, ie);
}
if (md) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: FT mobility domain %02x%02x",
md[0], md[1]);
omit_rsnxe = !wpa_bss_get_ie(bss, WLAN_EID_RSNX);
if (wpa_s->sme.assoc_req_ie_len + 5 <
sizeof(wpa_s->sme.assoc_req_ie)) {
struct rsn_mdie *mdie;
u8 *pos = wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len;
*pos++ = WLAN_EID_MOBILITY_DOMAIN;
*pos++ = sizeof(*mdie);
mdie = (struct rsn_mdie *) pos;
os_memcpy(mdie->mobility_domain, md,
MOBILITY_DOMAIN_ID_LEN);
mdie->ft_capab = md[MOBILITY_DOMAIN_ID_LEN];
wpa_s->sme.assoc_req_ie_len += 5;
}
if (wpa_s->sme.prev_bssid_set && wpa_s->sme.ft_used &&
os_memcmp(md, wpa_s->sme.mobility_domain, 2) == 0 &&
wpa_sm_has_ptk(wpa_s->wpa)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Trying to use FT "
"over-the-air");
params.auth_alg = WPA_AUTH_ALG_FT;
params.ie = wpa_s->sme.ft_ies;
params.ie_len = wpa_s->sme.ft_ies_len;
}
}
#endif /* CONFIG_IEEE80211R */
wpa_s->sme.mfp = wpas_get_ssid_pmf(wpa_s, ssid);
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 &&
_ie.capabilities &
(WPA_CAPABILITY_MFPC | WPA_CAPABILITY_MFPR)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Selected AP supports "
"MFP: require MFP");
wpa_s->sme.mfp = MGMT_FRAME_PROTECTION_REQUIRED;
}
}
#ifdef CONFIG_P2P
if (wpa_s->global->p2p) {
u8 *pos;
size_t len;
int res;
pos = wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len;
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
res = wpas_p2p_assoc_req_ie(wpa_s, bss, pos, len,
ssid->p2p_group);
if (res >= 0)
wpa_s->sme.assoc_req_ie_len += res;
}
#endif /* CONFIG_P2P */
#ifdef CONFIG_FST
if (wpa_s->fst_ies) {
int fst_ies_len = wpabuf_len(wpa_s->fst_ies);
if (wpa_s->sme.assoc_req_ie_len + fst_ies_len <=
sizeof(wpa_s->sme.assoc_req_ie)) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(wpa_s->fst_ies),
fst_ies_len);
wpa_s->sme.assoc_req_ie_len += fst_ies_len;
}
}
#endif /* CONFIG_FST */
sme_auth_handle_rrm(wpa_s, bss);
#ifdef CONFIG_RRM
wpa_s->sme.assoc_req_ie_len += wpas_supp_op_class_ie(
wpa_s, ssid, bss,
wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len);
#endif /* CONFIG_RRM */
if (params.p2p)
wpa_drv_get_ext_capa(wpa_s, WPA_IF_P2P_CLIENT);
else
wpa_drv_get_ext_capa(wpa_s, WPA_IF_STATION);
ext_capab_len = wpas_build_ext_capab(wpa_s, ext_capab,
sizeof(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 + 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 += ext_capab_len;
os_memcpy(pos, ext_capab, ext_capab_len);
}
#ifdef CONFIG_TESTING_OPTIONS
if (wpa_s->rsnxe_override_assoc &&
wpabuf_len(wpa_s->rsnxe_override_assoc) <=
sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len) {
wpa_printf(MSG_DEBUG, "TESTING: RSNXE AssocReq override");
os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
wpabuf_head(wpa_s->rsnxe_override_assoc),
wpabuf_len(wpa_s->rsnxe_override_assoc));
wpa_s->sme.assoc_req_ie_len +=
wpabuf_len(wpa_s->rsnxe_override_assoc);
} else
#endif /* CONFIG_TESTING_OPTIONS */
if (wpa_s->rsnxe_len > 0 &&
wpa_s->rsnxe_len <=
sizeof(wpa_s->sme.assoc_req_ie) - wpa_s->sme.assoc_req_ie_len &&
!omit_rsnxe) {
os_memcpy(wpa_s->sme.assoc_req_ie + wpa_s->sme.assoc_req_ie_len,
wpa_s->rsnxe, wpa_s->rsnxe_len);
wpa_s->sme.assoc_req_ie_len += wpa_s->rsnxe_len;
}
#ifdef CONFIG_HS20
if (is_hs20_network(wpa_s, ssid, bss)) {
struct wpabuf *hs20;
hs20 = wpabuf_alloc(20 + MAX_ROAMING_CONS_OI_LEN);
if (hs20) {
int pps_mo_id = hs20_get_pps_mo_id(wpa_s, ssid);
size_t len;
wpas_hs20_add_indication(hs20, pps_mo_id,
get_hs20_version(bss));
wpas_hs20_add_roam_cons_sel(hs20, ssid);
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
if (wpabuf_len(hs20) <= len) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(hs20), wpabuf_len(hs20));
wpa_s->sme.assoc_req_ie_len += wpabuf_len(hs20);
}
wpabuf_free(hs20);
}
}
#endif /* CONFIG_HS20 */
if (wpa_ie) {
size_t len;
wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Reinsert WPA IE");
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
if (len > wpa_ie_len) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpa_ie, wpa_ie_len);
wpa_s->sme.assoc_req_ie_len += wpa_ie_len;
} else {
wpa_dbg(wpa_s, MSG_DEBUG, "WPA: Failed to add WPA IE");
}
os_free(wpa_ie);
}
if (wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ]) {
struct wpabuf *buf = wpa_s->vendor_elem[VENDOR_ELEM_ASSOC_REQ];
size_t len;
len = sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len;
if (wpabuf_len(buf) <= len) {
os_memcpy(wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
wpabuf_head(buf), wpabuf_len(buf));
wpa_s->sme.assoc_req_ie_len += wpabuf_len(buf);
}
}
#ifdef CONFIG_MBO
mbo_ie = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
if (!wpa_s->disable_mbo_oce && mbo_ie) {
int len;
len = wpas_mbo_ie(wpa_s, wpa_s->sme.assoc_req_ie +
wpa_s->sme.assoc_req_ie_len,
sizeof(wpa_s->sme.assoc_req_ie) -
wpa_s->sme.assoc_req_ie_len,
!!mbo_attr_from_mbo_ie(mbo_ie,
OCE_ATTR_ID_CAPA_IND));
if (len >= 0)
wpa_s->sme.assoc_req_ie_len += len;
}
#endif /* CONFIG_MBO */
#ifdef CONFIG_SAE
if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE &&
pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid, ssid, 0,
NULL,
wpa_s->key_mgmt == WPA_KEY_MGMT_FT_SAE ?
WPA_KEY_MGMT_FT_SAE :
WPA_KEY_MGMT_SAE) == 0) {
wpa_dbg(wpa_s, MSG_DEBUG,
"PMKSA cache entry found - try to use PMKSA caching instead of new SAE authentication");
wpa_sm_set_pmk_from_pmksa(wpa_s->wpa);
params.auth_alg = WPA_AUTH_ALG_OPEN;
wpa_s->sme.sae_pmksa_caching = 1;
}
if (!skip_auth && params.auth_alg == WPA_AUTH_ALG_SAE) {
if (start)
resp = sme_auth_build_sae_commit(wpa_s, ssid,
bss->bssid, 0,
start == 2, NULL,
NULL);
else
resp = sme_auth_build_sae_confirm(wpa_s, 0);
if (resp == NULL) {
wpas_connection_failed(wpa_s, bss->bssid);
return;
}
params.auth_data = wpabuf_head(resp);
params.auth_data_len = wpabuf_len(resp);
wpa_s->sme.sae.state = start ? SAE_COMMITTED : SAE_CONFIRMED;
}
#endif /* CONFIG_SAE */
bssid_changed = !is_zero_ether_addr(wpa_s->bssid);
os_memset(wpa_s->bssid, 0, ETH_ALEN);
os_memcpy(wpa_s->pending_bssid, bss->bssid, ETH_ALEN);
if (bssid_changed)
wpas_notify_bssid_changed(wpa_s);
old_ssid = wpa_s->current_ssid;
wpa_s->current_ssid = ssid;
wpa_supplicant_rsn_supp_set_config(wpa_s, wpa_s->current_ssid);
wpa_supplicant_initiate_eapol(wpa_s);
#ifdef CONFIG_FILS
/* TODO: FILS operations can in some cases be done between different
* network_ctx (i.e., same credentials can be used with multiple
* networks). */
if (params.auth_alg == WPA_AUTH_ALG_OPEN &&
wpa_key_mgmt_fils(ssid->key_mgmt)) {
const u8 *indic;
u16 fils_info;
const u8 *realm, *username, *rrk;
size_t realm_len, username_len, rrk_len;
u16 next_seq_num;
/*
* Check FILS Indication element (FILS Information field) bits
* indicating supported authentication algorithms against local
* configuration (ssid->fils_dh_group). Try to use FILS
* authentication only if the AP supports the combination in the
* network profile. */
indic = wpa_bss_get_ie(bss, WLAN_EID_FILS_INDICATION);
if (!indic || indic[1] < 2) {
wpa_printf(MSG_DEBUG, "SME: " MACSTR
" does not include FILS Indication element - cannot use FILS authentication with it",
MAC2STR(bss->bssid));
goto no_fils;
}
fils_info = WPA_GET_LE16(indic + 2);
if (ssid->fils_dh_group == 0 && !(fils_info & BIT(9))) {
wpa_printf(MSG_DEBUG, "SME: " MACSTR
" does not support FILS SK without PFS - cannot use FILS authentication with it",
MAC2STR(bss->bssid));
goto no_fils;
}
if (ssid->fils_dh_group != 0 && !(fils_info & BIT(10))) {
wpa_printf(MSG_DEBUG, "SME: " MACSTR
" does not support FILS SK with PFS - cannot use FILS authentication with it",
MAC2STR(bss->bssid));
goto no_fils;
}
if (wpa_s->last_con_fail_realm &&
eapol_sm_get_erp_info(wpa_s->eapol, &ssid->eap,
&username, &username_len,
&realm, &realm_len, &next_seq_num,
&rrk, &rrk_len) == 0 &&
realm && realm_len == wpa_s->last_con_fail_realm_len &&
os_memcmp(realm, wpa_s->last_con_fail_realm,
realm_len) == 0) {
wpa_printf(MSG_DEBUG,
"SME: FILS authentication for this realm failed last time - try to regenerate ERP key hierarchy");
goto no_fils;
}
if (pmksa_cache_set_current(wpa_s->wpa, NULL, bss->bssid,
ssid, 0,
wpa_bss_get_fils_cache_id(bss),
0) == 0)
wpa_printf(MSG_DEBUG,
"SME: Try to use FILS with PMKSA caching");
resp = fils_build_auth(wpa_s->wpa, ssid->fils_dh_group, md);
if (resp) {
int auth_alg;
if (ssid->fils_dh_group)
wpa_printf(MSG_DEBUG,
"SME: Try to use FILS SK authentication with PFS (DH Group %u)",
ssid->fils_dh_group);
else
wpa_printf(MSG_DEBUG,
"SME: Try to use FILS SK authentication without PFS");
auth_alg = ssid->fils_dh_group ?
WPA_AUTH_ALG_FILS_SK_PFS : WPA_AUTH_ALG_FILS;
params.auth_alg = auth_alg;
params.auth_data = wpabuf_head(resp);
params.auth_data_len = wpabuf_len(resp);
wpa_s->sme.auth_alg = auth_alg;
}
}
no_fils:
#endif /* CONFIG_FILS */
wpa_supplicant_cancel_sched_scan(wpa_s);
wpa_supplicant_cancel_scan(wpa_s);
wpa_msg(wpa_s, MSG_INFO, "SME: Trying to authenticate with " MACSTR
" (SSID='%s' freq=%d MHz)", MAC2STR(params.bssid),
wpa_ssid_txt(params.ssid, params.ssid_len), params.freq);
eapol_sm_notify_portValid(wpa_s->eapol, false);
wpa_clear_keys(wpa_s, bss->bssid);
wpa_supplicant_set_state(wpa_s, WPA_AUTHENTICATING);
if (old_ssid != wpa_s->current_ssid)
wpas_notify_network_changed(wpa_s);
#ifdef CONFIG_HS20
hs20_configure_frame_filters(wpa_s);
#endif /* CONFIG_HS20 */
#ifdef CONFIG_P2P
/*
* If multi-channel concurrency is not supported, check for any
* frequency conflict. In case of any frequency conflict, remove the
* least prioritized connection.
*/
if (wpa_s->num_multichan_concurrent < 2) {
int freq, num;
num = get_shared_radio_freqs(wpa_s, &freq, 1);
if (num > 0 && freq > 0 && freq != params.freq) {
wpa_printf(MSG_DEBUG,
"Conflicting frequency found (%d != %d)",
freq, params.freq);
if (wpas_p2p_handle_frequency_conflicts(wpa_s,
params.freq,
ssid) < 0) {
wpas_connection_failed(wpa_s, bss->bssid);
wpa_supplicant_mark_disassoc(wpa_s);
wpabuf_free(resp);
wpas_connect_work_done(wpa_s);
return;
}
}
}
#endif /* CONFIG_P2P */
if (skip_auth) {
wpa_msg(wpa_s, MSG_DEBUG,
"SME: Skip authentication step on reassoc-to-same-BSS");
wpabuf_free(resp);
sme_associate(wpa_s, ssid->mode, bss->bssid, WLAN_AUTH_OPEN);
return;
}
wpa_s->sme.auth_alg = params.auth_alg;
if (wpa_drv_authenticate(wpa_s, ¶ms) < 0) {
wpa_msg(wpa_s, MSG_INFO, "SME: Authentication request to the "
"driver failed");
wpas_connection_failed(wpa_s, bss->bssid);
wpa_supplicant_mark_disassoc(wpa_s);
wpabuf_free(resp);
wpas_connect_work_done(wpa_s);
return;
}
eloop_register_timeout(SME_AUTH_TIMEOUT, 0, sme_auth_timer, wpa_s,
NULL);
/*
* Association will be started based on the authentication event from
* the driver.
*/
wpabuf_free(resp);
}
static void sme_auth_start_cb(struct wpa_radio_work *work, int deinit)
{
struct wpa_connect_work *cwork = work->ctx;
struct wpa_supplicant *wpa_s = work->wpa_s;
wpa_s->roam_in_progress = false;
#ifdef CONFIG_WNM
wpa_s->bss_trans_mgmt_in_progress = false;
#endif /* CONFIG_WNM */
if (deinit) {
if (work->started)
wpa_s->connect_work = NULL;
wpas_connect_work_free(cwork);
return;
}
wpa_s->connect_work = work;
if (cwork->bss_removed ||
!wpas_valid_bss_ssid(wpa_s, cwork->bss, cwork->ssid) ||
wpas_network_disabled(wpa_s, cwork->ssid)) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: BSS/SSID entry for authentication not valid anymore - drop connection attempt");
wpas_connect_work_done(wpa_s);
return;
}
/* Starting new connection, so clear the possibly used WPA IE from the
* previous association. */
wpa_sm_set_assoc_wpa_ie(wpa_s->wpa, NULL, 0);
wpa_sm_set_assoc_rsnxe(wpa_s->wpa, NULL, 0);
wpa_s->rsnxe_len = 0;
sme_send_authentication(wpa_s, cwork->bss, cwork->ssid, 1);
}
void sme_authenticate(struct wpa_supplicant *wpa_s,
struct wpa_bss *bss, struct wpa_ssid *ssid)
{
struct wpa_connect_work *cwork;
if (bss == NULL || ssid == NULL)
return;
if (wpa_s->connect_work) {
wpa_dbg(wpa_s, MSG_DEBUG, "SME: Reject sme_authenticate() call since connect_work exist");
return;
}
if (wpa_s->roam_in_progress) {
wpa_dbg(wpa_s, MSG_DEBUG,
"SME: Reject sme_authenticate() in favor of explicit roam request");
return;
}
#ifdef CONFIG_WNM
if (wpa_s->bss_trans_mgmt_in_progress) {