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hostapd: Support 4-way handshake offload for AP/P2P GO

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Add support for offloaded 4-way handshake in AP/P2P GO mode. For drivers
supporting the AP PSK offload, wpa_supplicant/hostapd passes down the
PSK for the driver to handle the 4-way handshake. The driver is expected
to indicate port authorized event to indicate that the 4-way handshake
is completed successfully.

Signed-off-by: Vinayak Yadawad <vinayak.yadawad@broadcom.com>
This commit is contained in:
Vinayak Yadawad 2023-11-08 18:26:09 +05:30 • committed by Jouni Malinen
parent 77386f51ac
commit da364180fb
9 changed files with 88 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/ap/beacon.c
View file

@ -17,6 +17,7 @@
#include "common/ieee802_11_common.h"
#include "common/hw_features_common.h"
#include "common/wpa_ctrl.h"
#include "crypto/sha1.h"
#include "wps/wps_defs.h"
#include "p2p/p2p.h"
#include "hostapd.h"
@ -2026,6 +2027,23 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
resp = hostapd_probe_resp_offloads(hapd, &resp_len);
#endif /* NEED_AP_MLME */
/* If key management offload is enabled, configure PSK to the driver. */
if (wpa_key_mgmt_wpa_psk_no_sae(hapd->conf->wpa_key_mgmt) &&
(hapd->iface->drv_flags2 &
WPA_DRIVER_FLAGS2_4WAY_HANDSHAKE_AP_PSK)) {
if (hapd->conf->ssid.wpa_psk && hapd->conf->ssid.wpa_psk_set) {
os_memcpy(params->psk, hapd->conf->ssid.wpa_psk->psk,
PMK_LEN);
params->psk_len = PMK_LEN;
} else if (hapd->conf->ssid.wpa_passphrase &&
pbkdf2_sha1(hapd->conf->ssid.wpa_passphrase,
hapd->conf->ssid.ssid,
hapd->conf->ssid.ssid_len, 4096,
params->psk, PMK_LEN) == 0) {
params->psk_len = PMK_LEN;
}
}
params->head = (u8 *) head;
params->head_len = head_len;
params->tail = tail;

10
src/ap/drv_callbacks.c
View file

@ -2186,6 +2186,7 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
union wpa_event_data *data)
{
struct hostapd_data *hapd = ctx;
struct sta_info *sta;
#ifndef CONFIG_NO_STDOUT_DEBUG
int level = MSG_DEBUG;
@ -2305,6 +2306,15 @@ void wpa_supplicant_event(void *ctx, enum wpa_event_type event,
data->assoc_info.link_addr,
data->assoc_info.reassoc);
break;
case EVENT_PORT_AUTHORIZED:
/* Port authorized event for an associated STA */
sta = ap_get_sta(hapd, data->port_authorized.sta_addr);
if (sta)
ap_sta_set_authorized(hapd, sta, 1);
else
wpa_printf(MSG_DEBUG,
"No STA info matching port authorized event found");
break;
#ifdef CONFIG_OWE
case EVENT_UPDATE_DH:
if (!data)

6
src/ap/hostapd.c
View file

@ -3573,8 +3573,12 @@ void hostapd_new_assoc_sta(struct hostapd_data *hapd, struct sta_info *sta,
sta->auth_alg != WLAN_AUTH_FILS_PK &&
!(sta->flags & (WLAN_STA_WPS | WLAN_STA_MAYBE_WPS)))
wpa_auth_sm_event(sta->wpa_sm, WPA_REAUTH);
} else
} else if (!(hapd->iface->drv_flags2 &
WPA_DRIVER_FLAGS2_4WAY_HANDSHAKE_AP_PSK)) {
/* The 4-way handshake offloaded case will have this handled
* based on the port authorized event. */
wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
}
if (hapd->iface->drv_flags & WPA_DRIVER_FLAGS_WIRED) {
if (eloop_cancel_timeout(ap_handle_timer, hapd, sta) > 0) {