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components/wpa_supplicant/esp_supplicant/src/esp_hostap.c
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/*
* SPDX-FileCopyrightText: 2019-2024 Espressif Systems (Shanghai) CO LTD
*
* SPDX-License-Identifier: Apache-2.0
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "crypto/sha1.h"
#include "common/ieee802_11_defs.h"
#include "common/eapol_common.h"
#include "ap/wpa_auth.h"
#include "ap/ap_config.h"
#include "utils/wpa_debug.h"
#include "ap/hostapd.h"
#include "ap/wpa_auth_i.h"
#include "esp_wifi_driver.h"
#include "esp_wifi_types.h"
#include "esp_wpa3_i.h"
#include "esp_wps.h"
#include "esp_wps_i.h"
#include "ap/sta_info.h"
#include "common/sae.h"
#include "ap/ieee802_11.h"
#define WIFI_PASSWORD_LEN_MAX 65
struct hostapd_data *global_hapd;
#ifdef CONFIG_SAE
extern SemaphoreHandle_t g_wpa3_hostap_auth_api_lock;
#endif /* CONFIG_SAE */
struct hostapd_data *hostapd_get_hapd_data(void)
{
return global_hapd;
}
void *hostap_init(void)
{
struct wifi_ssid *ssid = esp_wifi_ap_get_prof_ap_ssid_internal();
struct hostapd_data *hapd = NULL;
struct wpa_auth_config *auth_conf;
u16 spp_attrubute = 0;
u8 pairwise_cipher;
wifi_pmf_config_t pmf_cfg = {0};
uint8_t authmode;
hapd = (struct hostapd_data *)os_zalloc(sizeof(struct hostapd_data));
if (hapd == NULL) {
return NULL;
}
hapd->conf = (struct hostapd_bss_config *)os_zalloc(sizeof(struct hostapd_bss_config));
if (hapd->conf == NULL) {
os_free(hapd);
return NULL;
}
auth_conf = (struct wpa_auth_config *)os_zalloc(sizeof(struct wpa_auth_config));
if (auth_conf == NULL) {
goto fail;
}
hapd->conf->sae_pwe = esp_wifi_get_config_sae_pwe_h2e_internal(WIFI_IF_AP);
auth_conf->sae_pwe = hapd->conf->sae_pwe;
authmode = esp_wifi_ap_get_prof_authmode_internal();
if (authmode == WIFI_AUTH_WPA_PSK) {
auth_conf->wpa = WPA_PROTO_WPA;
}
if (authmode == WIFI_AUTH_WPA2_PSK) {
auth_conf->wpa = WPA_PROTO_RSN;
}
if (authmode == WIFI_AUTH_WPA_WPA2_PSK) {
auth_conf->wpa = WPA_PROTO_RSN | WPA_PROTO_WPA;
}
if (authmode == WIFI_AUTH_WPA3_PSK || authmode == WIFI_AUTH_WPA2_WPA3_PSK) {
auth_conf->wpa = WPA_PROTO_RSN;
}
pairwise_cipher = esp_wifi_ap_get_prof_pairwise_cipher_internal();
#ifdef CONFIG_IEEE80211W
if ((auth_conf->wpa & WPA_PROTO_RSN) == WPA_PROTO_RSN) {
esp_wifi_get_pmf_config_internal(&pmf_cfg, WIFI_IF_AP);
if (pmf_cfg.required) {
pairwise_cipher = WIFI_CIPHER_TYPE_CCMP;
}
}
#endif /* CONFIG_IEEE80211W */
/* TKIP is compulsory in WPA Mode */
if (auth_conf->wpa == WPA_PROTO_WPA && pairwise_cipher == WIFI_CIPHER_TYPE_CCMP) {
pairwise_cipher = WIFI_CIPHER_TYPE_TKIP_CCMP;
}
if (pairwise_cipher == WIFI_CIPHER_TYPE_TKIP) {
auth_conf->wpa_group = WPA_CIPHER_TKIP;
auth_conf->wpa_pairwise = WPA_CIPHER_TKIP;
auth_conf->rsn_pairwise = WPA_CIPHER_TKIP;
} else if (pairwise_cipher == WIFI_CIPHER_TYPE_CCMP) {
auth_conf->wpa_group = WPA_CIPHER_CCMP;
auth_conf->wpa_pairwise = WPA_CIPHER_CCMP;
auth_conf->rsn_pairwise = WPA_CIPHER_CCMP;
} else {
auth_conf->wpa_group = WPA_CIPHER_TKIP;
auth_conf->wpa_pairwise = WPA_CIPHER_CCMP | WPA_CIPHER_TKIP;
auth_conf->rsn_pairwise = WPA_CIPHER_CCMP | WPA_CIPHER_TKIP;
}
auth_conf->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
auth_conf->eapol_version = EAPOL_VERSION;
hapd->conf->sae_anti_clogging_threshold = SAE_ANTI_CLOGGING_THRESHOLD;
#ifdef CONFIG_IEEE80211W
if (pmf_cfg.required && pmf_cfg.capable) {
auth_conf->ieee80211w = MGMT_FRAME_PROTECTION_REQUIRED;
auth_conf->wpa_key_mgmt = WPA_KEY_MGMT_PSK_SHA256;
wpa_printf(MSG_DEBUG, "%s :pmf required", __func__);
} else if (pmf_cfg.capable && !pmf_cfg.required) {
auth_conf->ieee80211w = MGMT_FRAME_PROTECTION_OPTIONAL;
auth_conf->wpa_key_mgmt = WPA_KEY_MGMT_PSK;
wpa_printf(MSG_DEBUG, "%s : pmf optional", __func__);
}
if (authmode == WIFI_AUTH_WPA2_WPA3_PSK) {
auth_conf->wpa_key_mgmt |= WPA_KEY_MGMT_SAE;
}
if (authmode == WIFI_AUTH_WPA3_PSK) {
auth_conf->wpa_key_mgmt = WPA_KEY_MGMT_SAE;
}
#endif /* CONFIG_IEEE80211W */
spp_attrubute = esp_wifi_get_spp_attrubute_internal(WIFI_IF_AP);
auth_conf->spp_sup.capable = ((spp_attrubute & WPA_CAPABILITY_SPP_CAPABLE) ? SPP_AMSDU_CAP_ENABLE : SPP_AMSDU_CAP_DISABLE);
auth_conf->spp_sup.require = ((spp_attrubute & WPA_CAPABILITY_SPP_REQUIRED) ? SPP_AMSDU_REQ_ENABLE : SPP_AMSDU_REQ_DISABLE);
memcpy(hapd->conf->ssid.ssid, ssid->ssid, ssid->len);
hapd->conf->ssid.ssid_len = ssid->len;
hapd->conf->wpa_key_mgmt = auth_conf->wpa_key_mgmt;
hapd->conf->ssid.wpa_passphrase = (char *)os_zalloc(WIFI_PASSWORD_LEN_MAX);
if (hapd->conf->ssid.wpa_passphrase == NULL) {
goto fail;
}
#ifdef CONFIG_SAE
if (authmode == WIFI_AUTH_WPA3_PSK ||
authmode == WIFI_AUTH_WPA2_WPA3_PSK) {
if (wpa3_hostap_auth_init(hapd) != 0) {
goto fail;
}
}
#endif /* CONFIG_SAE */
os_memcpy(hapd->conf->ssid.wpa_passphrase, esp_wifi_ap_get_prof_password_internal(), strlen((char *)esp_wifi_ap_get_prof_password_internal()));
hapd->conf->ssid.wpa_passphrase[WIFI_PASSWORD_LEN_MAX - 1] = '\0';
hapd->conf->max_num_sta = esp_wifi_ap_get_max_sta_conn();
auth_conf->transition_disable = esp_wifi_ap_get_transition_disable_internal();
if (authmode != WIFI_AUTH_WPA3_PSK &&
authmode != WIFI_AUTH_WPA2_WPA3_PSK && auth_conf->transition_disable) {
auth_conf->transition_disable = 0;
wpa_printf(MSG_DEBUG, "overriding transition_disable config with 0 as authmode is not WPA3");
}
#ifdef CONFIG_SAE
auth_conf->sae_require_mfp = 1;
#endif /* CONFIG_SAE */
//TODO change it when AP support GCMP-PSK
auth_conf->group_mgmt_cipher = WPA_CIPHER_AES_128_CMAC;
hapd->conf->ap_max_inactivity = 5 * 60;
hostapd_setup_wpa_psk(hapd->conf);
esp_wifi_get_macaddr_internal(WIFI_IF_AP, hapd->own_addr);
hapd->wpa_auth = wpa_init(hapd->own_addr, auth_conf, NULL);
if (hapd->wpa_auth == NULL) {
goto fail;
}
esp_wifi_set_appie_internal(WIFI_APPIE_WPA, hapd->wpa_auth->wpa_ie, (uint16_t)hapd->wpa_auth->wpa_ie_len, 0);
os_free(auth_conf);
global_hapd = hapd;
return (void *)hapd;
fail:
if (hapd->conf->ssid.wpa_passphrase != NULL) {
os_free(hapd->conf->ssid.wpa_passphrase);
}
if (auth_conf != NULL) {
os_free(auth_conf);
}
os_free(hapd->conf);
os_free(hapd);
hapd = NULL;
return NULL;
}
void hostapd_cleanup(struct hostapd_data *hapd)
{
if (hapd == NULL) {
return;
}
if (hapd->wpa_auth) {
wpa_deinit(hapd->wpa_auth);
hapd->wpa_auth = NULL;
}
if (hapd->conf) {
forced_memzero(hapd->conf->ssid.wpa_passphrase, WIFI_PASSWORD_LEN_MAX);
os_free(hapd->conf->ssid.wpa_passphrase);
hostapd_config_free_bss(hapd->conf);
hapd->conf = NULL;
}
#ifdef CONFIG_SAE
struct hostapd_sae_commit_queue *q, *tmp;
if (dl_list_empty(&hapd->sae_commit_queue)) {
dl_list_for_each_safe(q, tmp, &hapd->sae_commit_queue,
struct hostapd_sae_commit_queue, list) {
dl_list_del(&q->list);
os_free(q);
}
}
#endif /* CONFIG_SAE */
#ifdef CONFIG_WPS_REGISTRAR
if (esp_wifi_get_wps_type_internal() != WPS_TYPE_DISABLE ||
esp_wifi_get_wps_status_internal() != WPS_STATUS_DISABLE) {
esp_wifi_ap_wps_disable();
}
#endif /* CONFIG_WPS_REGISTRAR */
os_free(hapd);
global_hapd = NULL;
}
bool hostap_deinit(void *data)
{
struct hostapd_data *hapd = (struct hostapd_data *)data;
if (hapd == NULL) {
return true;
}
esp_wifi_unset_appie_internal(WIFI_APPIE_WPA);
esp_wifi_unset_appie_internal(WIFI_APPIE_ASSOC_RESP);
#ifdef CONFIG_WPS_REGISTRAR
wifi_ap_wps_disable_internal();
#endif
#ifdef CONFIG_SAE
wpa3_hostap_auth_deinit();
/* Wait till lock is released by wpa3 task */
if (g_wpa3_hostap_auth_api_lock &&
WPA3_HOSTAP_AUTH_API_LOCK() == pdTRUE) {
WPA3_HOSTAP_AUTH_API_UNLOCK();
}
#endif /* CONFIG_SAE */
hostapd_cleanup(hapd);
return true;
}
int esp_wifi_build_rsnxe(struct hostapd_data *hapd, u8 *eid, size_t len)
{
u8 *pos = eid;
u16 capab = 0;
size_t flen;
if (!(hapd->wpa_auth->conf.wpa & WPA_PROTO_RSN)) {
return 0;
}
if (wpa_key_mgmt_sae(hapd->wpa_auth->conf.wpa_key_mgmt) &&
(hapd->conf->sae_pwe == SAE_PWE_HASH_TO_ELEMENT
|| hapd->conf->sae_pwe == SAE_PWE_BOTH)) {
capab |= BIT(WLAN_RSNX_CAPAB_SAE_H2E);
}
flen = 1;
if (len < 2 + flen || !capab) {
return 0; /* no supported extended RSN capabilities */
}
capab |= flen - 1; /* bit 0-3 = Field length (n - 1) */
*pos++ = WLAN_EID_RSNX;
*pos++ = flen;
*pos++ = capab & 0x00ff;
return pos - eid;
}
u16 esp_send_assoc_resp(struct hostapd_data *hapd, const u8 *addr,
u16 status_code, bool omit_rsnxe, int subtype)
{
#define ASSOC_RESP_LENGTH 20
u8 buf[ASSOC_RESP_LENGTH];
wifi_mgmt_frm_req_t *reply = NULL;
int send_len = 0;
int res = WLAN_STATUS_SUCCESS;
if (!omit_rsnxe) {
send_len = esp_wifi_build_rsnxe(hapd, buf, ASSOC_RESP_LENGTH);
}
esp_wifi_set_appie_internal(WIFI_APPIE_ASSOC_RESP, buf, send_len, 0);
reply = os_zalloc(sizeof(wifi_mgmt_frm_req_t) + sizeof(uint16_t));
if (!reply) {
wpa_printf(MSG_ERROR, "failed to allocate memory for assoc response");
return WLAN_STATUS_UNSPECIFIED_FAILURE;
}
reply->ifx = WIFI_IF_AP;
reply->subtype = subtype;
os_memcpy(reply->da, addr, ETH_ALEN);
reply->data_len = sizeof(uint16_t);
((uint16_t *)reply->data)[0] = status_code;
if (esp_wifi_send_mgmt_frm_internal(reply) != 0) {
res = WLAN_STATUS_UNSPECIFIED_FAILURE;
wpa_printf(MSG_INFO, "esp_send_assoc_resp_failed: send failed");
}
#undef ASSOC_RESP_LENGTH
os_free(reply);
return res;
}
uint8_t wpa_status_to_reason_code(int status)
{
switch (status) {
case WLAN_STATUS_INVALID_IE:
return WLAN_REASON_INVALID_IE;
case WLAN_STATUS_GROUP_CIPHER_NOT_VALID:
return WLAN_REASON_GROUP_CIPHER_NOT_VALID;
case WLAN_STATUS_PAIRWISE_CIPHER_NOT_VALID:
return WLAN_REASON_PAIRWISE_CIPHER_NOT_VALID;
case WLAN_STATUS_AKMP_NOT_VALID:
return WLAN_REASON_AKMP_NOT_VALID;
case WLAN_STATUS_CIPHER_REJECTED_PER_POLICY:
return WLAN_REASON_CIPHER_SUITE_REJECTED;
case WLAN_STATUS_INVALID_PMKID:
return WLAN_REASON_INVALID_PMKID;
case WLAN_STATUS_INVALID_MDIE:
return WLAN_REASON_INVALID_MDE;
default:
return WLAN_REASON_UNSPECIFIED;
}
}
bool hostap_new_assoc_sta(struct sta_info *sta, uint8_t *bssid, uint8_t *wpa_ie,
uint8_t wpa_ie_len, uint8_t *rsnxe, uint16_t rsnxe_len,
bool *pmf_enable, int subtype, uint8_t *pairwise_cipher, uint8_t *reason)
{
struct hostapd_data *hapd = (struct hostapd_data*)esp_wifi_get_hostap_private_internal();
enum wpa_validate_result res = WPA_IE_OK;
int status = WLAN_STATUS_SUCCESS;
bool omit_rsnxe = false;
if (!sta || !bssid || !wpa_ie) {
return false;
}
if (hapd) {
if (hapd->wpa_auth->conf.wpa) {
if (sta->wpa_sm) {
wpa_auth_sta_deinit(sta->wpa_sm);
}
sta->wpa_sm = wpa_auth_sta_init(hapd->wpa_auth, bssid);
wpa_printf(MSG_DEBUG, "init wpa sm=%p", sta->wpa_sm);
if (sta->wpa_sm == NULL) {
status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
goto send_resp;
}
res = wpa_validate_wpa_ie(hapd->wpa_auth, sta->wpa_sm, wpa_ie, wpa_ie_len, rsnxe, rsnxe_len);
#ifdef CONFIG_SAE
if (wpa_auth_uses_sae(sta->wpa_sm) && sta->sae &&
sta->sae->state == SAE_ACCEPTED) {
wpa_auth_add_sae_pmkid(sta->wpa_sm, sta->sae->pmkid);
}
#endif /* CONFIG_SAE */
status = wpa_res_to_status_code(res);
send_resp:
if (!rsnxe) {
omit_rsnxe = true;
}
if (esp_send_assoc_resp(hapd, bssid, status, omit_rsnxe, subtype) != WLAN_STATUS_SUCCESS) {
status = WLAN_STATUS_AP_UNABLE_TO_HANDLE_NEW_STA;
}
if (status != WLAN_STATUS_SUCCESS) {
*reason = wpa_status_to_reason_code(status);
return false;
}
//Check whether AP uses Management Frame Protection for this connection
*pmf_enable = wpa_auth_uses_mfp(sta->wpa_sm);
*pairwise_cipher = GET_BIT_POSITION(sta->wpa_sm->pairwise);
}
wpa_auth_sta_associated(hapd->wpa_auth, sta->wpa_sm);
}
return true;
}
#ifdef CONFIG_WPS_REGISTRAR
static void ap_free_sta_timeout(void *ctx, void *data)
{
struct hostapd_data *hapd = (struct hostapd_data *) ctx;
u8 *addr = (u8 *) data;
struct sta_info *sta = ap_get_sta(hapd, addr);
if (sta) {
ap_free_sta(hapd, sta);
}
os_free(addr);
}
#endif
bool wpa_ap_remove(u8* bssid)
{
struct hostapd_data *hapd = hostapd_get_hapd_data();
if (!hapd) {
return false;
}
struct sta_info *sta = ap_get_sta(hapd, bssid);
if (!sta) {
return false;
}
#ifdef CONFIG_SAE
if (sta->lock) {
if (os_semphr_take(sta->lock, 0)) {
ap_free_sta(hapd, sta);
} else {
sta->remove_pending = true;
}
return true;
}
#endif /* CONFIG_SAE */
#ifdef CONFIG_WPS_REGISTRAR
wpa_printf(MSG_DEBUG, "wps_status=%d", wps_get_status());
if (wps_get_status() == WPS_STATUS_PENDING) {
u8 *addr = os_malloc(ETH_ALEN);
if (!addr) {
return false;
}
os_memcpy(addr, sta->addr, ETH_ALEN);
eloop_register_timeout(0, 10000, ap_free_sta_timeout, hapd, addr);
} else
#endif
ap_free_sta(hapd, sta);
return true;
}
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