Bluetooth Pairing Without User Confirmation

Bluetooth pairing without user confirmation

This need is exactly why createInsecureRfcommSocketToServiceRecord() was added to BluetoothDevice starting in Android 2.3.3 (API Level 10) (SDK Docs)...before that there was no SDK support for this. It was designed to allow Android to connect to devices without user interfaces for entering a PIN code (like an embedded device), but it just as usable for setting up a connection between two devices without user PIN entry.

The corollary method listenUsingInsecureRfcommWithServiceRecord() in BluetoothAdapter is used to accept these types of connections. It's not a security breach because the methods must be used as a pair. You cannot use this to simply attempt to pair with any old Bluetooth device.

You can also do short range communications over NFC, but that hardware is less prominent on Android devices. Definitely pick one, and don't try to create a solution that uses both.

Hope that Helps!

P.S. There are also ways to do this on many devices prior to 2.3 using reflection, because the code did exist...but I wouldn't necessarily recommend this for mass-distributed production applications. See this StackOverflow.

Bluetooth Pairing Without users' confirmation

Yes and no, but you shouldn't anyway.

The only way to do this in Android is by using the BLUETOOTH_PRIVILEGED permission, which, as you can see, is only granted to apps in /system/priv-app/ or apps signed by the platform key of the device.

So unless you have root and can move your app to /system/priv-app/, you can't do what you want. Even if you can do this, however, don't. It's not a good user experience when someone installs an app, only for it to move itself to the system partition and start pairing without any notification.

How to pair Bluetooth device without confirmation

Pairing a device always requires user input. This is to prevent the case where a malicious app tries to pair with a device that may operate against the desire of the user (for example, transmitting private audio and data to it).

Bluetooth Low Energy devices (like beacons) don't require pairing, but all they do is broadcast tiny bits of data periodically. Communication with BTLE devices like this are supported in KitKat and later as long as the app has permission to do so.

How to provide confirmation in windows iot core for custom pairing

The confirmation is optional and is only done on Desktop and Mobile as part of the system-level user experience. By calling the Accept method the pairing will proceed.

If you wish to provide a confirmation things get tricky because MessageDialog isn't currently supported on IoT Core: https://developer.microsoft.com/en-us/windows/iot/win10/unavailableapis

As an alternative, others have proposed creating your own UserControl or using a Flyout to mimic the experience.

Not to display Pairing pop up mssage during Bluetooth pairing With 32feetnet in Windows 10

EventHandler authHandler = new EventHandler(handleAuthRequests);
BluetoothWin32Authentication authenticator = new BluetoothWin32Authentication(authHandler);

private void btnPairSSP_Click(object sender, EventArgs e)
{
    BluetoothDeviceInfo selectedDevice = devices[lstBTDevices.SelectedIndex];
    if (MessageBox.Show(String.Format("Would you like to attempt to pair with {0}?", selectedDevice.DeviceName), "Pair Device", MessageBoxButtons.YesNo) == DialogResult.Yes)
    {
        Task t = new Task(PairBluetoothTask);
        t.Start();
    }
}

private void PairBluetoothTask()
{
    BluetoothDeviceInfo selectedDevice = devices[lstBTDevices.SelectedIndex];
    if (BluetoothSecurity.PairRequest(selectedDevice.DeviceAddress, null))
    {
        MessageBox.Show("We paired!");
    }
    else
    {
        MessageBox.Show("Failed to pair!");
    }

}

private void handleAuthRequests(object sender, BluetoothWin32AuthenticationEventArgs e)
{
    e.Confirm = true;

}

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