net: wifi: shell: free station certs memory during disconnect

It will be have a relative high probability to get continuous memory
for the next enterprise conenction, if free station certs memory
during disconnect, thus sys_heap need less memory for big size
EAP-TLS server cert packet, otherwise more memory space needed.

Signed-off-by: Rex Chen <[email protected]>

Author: Rex-Chen-NXP

modules/hostap/src/supp_api.c

@@ -826,6 +826,18 @@ int hapd_process_enterprise_config(struct hostapd_iface *iface,
 }
 #endif
 
+#ifdef CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE
+static void wpas_remove_certs(struct wpa_supplicant *wpa_s)
+{
+	wpa_config_remove_blob(wpa_s->conf, "ca_cert");
+	wpa_config_remove_blob(wpa_s->conf, "client_cert");
+	wpa_config_remove_blob(wpa_s->conf, "private_key");
+	wpa_config_remove_blob(wpa_s->conf, "ca_cert2");
+	wpa_config_remove_blob(wpa_s->conf, "client_cert2");
+	wpa_config_remove_blob(wpa_s->conf, "private_key2");
+}
+#endif
+
 static int wpas_add_and_config_network(struct wpa_supplicant *wpa_s,
 				       struct wifi_connect_req_params *params,
 				       bool mode_ap)
@@ -844,6 +856,8 @@ static int wpas_add_and_config_network(struct wpa_supplicant *wpa_s,
 	char phase1[128] = {0};
 	char *phase2 = NULL;
 	unsigned int index;
+
+	wpas_remove_certs(wpa_s);
 #endif
 
 	if (!wpa_cli_cmd_v("remove_network all")) {
@@ -1365,6 +1379,10 @@ static int wpas_disconnect_network(const struct device *dev, int cur_mode)
 		wifi_mgmt_raise_disconnect_complete_event(iface, ret);
 	}
 
+#ifdef CONFIG_WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE
+	wpas_remove_certs(wpa_s);
+#endif
+
 	if (!wpa_cli_cmd_v("remove_network all")) {
 		wpa_printf(MSG_ERROR, "Failed to remove all networks");
 	}