android: Determine security type of wifi networks in range (without connecting to them)

Solution 1:

I think you can find it in the source code of Settings.apk.

First you should call wifiManager.getConfiguredNetworks() or wifiManager.getScanResults(), then use the two methods below: (find them in AccessPoint class "com.android.settings.wifi"):

static int getSecurity(WifiConfiguration config) {
    if (config.allowedKeyManagement.get(KeyMgmt.WPA_PSK)) {
        return SECURITY_PSK;
    }
    if (config.allowedKeyManagement.get(KeyMgmt.WPA_EAP) ||
            config.allowedKeyManagement.get(KeyMgmt.IEEE8021X)) {
        return SECURITY_EAP;
    }
    return (config.wepKeys[0] != null) ? SECURITY_WEP : SECURITY_NONE;
}

static int getSecurity(ScanResult result) {
    if (result.capabilities.contains("WEP")) {
        return SECURITY_WEP;
    } else if (result.capabilities.contains("PSK")) {
        return SECURITY_PSK;
    } else if (result.capabilities.contains("EAP")) {
        return SECURITY_EAP;
    }
    return SECURITY_NONE;
}

Hope this is helpful.

Solution 2:

You need to parse the ScanResult's capabilities string in the scanComplete method. According to the Android developer documentation, :

ScanResult.capabilities describes the authentication, key management, and encryption schemes supported by the access point.

You might be able to make use of -- or at the very least use as an example -- the static helper methods available in the AccessPointState class.

• AccessPointState.getScanResultSecurity
• AccessPointState.isEnterprise

Solution 3:

Thanks very much,... you made my day...

I have something to add here. Without scanning for the networks, one can get the currently connected wifi configuration information (specially encryption and key management) as follows,

WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
List<ScanResult> networkList = wifi.getScanResults();
if (networkList != null) {
    for (ScanResult network : networkList)
    {
        String Capabilities =  network.capabilities;        
        Log.w (TAG, network.SSID + " capabilities : " + Capabilities);
    }
}