128 lines
3.7 KiB
C#
128 lines
3.7 KiB
C#
using System.Net;
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using System.Net.Sockets;
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using Android.Content;
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using Android.Hardware.Biometrics;
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using Android.OS;
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using Java.Lang;
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namespace DemoAndroid;
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[Activity(Label = "@string/app_name", MainLauncher = true, Theme = "@style/Default")]
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public class WakeOnLanActivity : Activity
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{
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private const int BiometricStrong = 0x0000000f;
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private const int BiometricWeak = 0x000000ff;
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private const int DeviceCredential = 0x00008000;
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private bool _authenticated = false;
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protected override void OnCreate(Bundle? savedInstanceState)
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{
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base.OnCreate(savedInstanceState);
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// Create your application here
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SetContentView(Resource.Layout.activity_wakeonlan);
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var button = FindViewById<Button>(Resource.Id.btnWakeOnLan);
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button.Click += (sender, args) =>
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{
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OnlyAuthenticated(WakePc);
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};
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}
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private void OnlyAuthenticated(Action action)
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{
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if (!_authenticated)
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{
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var callback = new BiometricCallback(this, () =>
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{
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_authenticated = true;
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action();
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});
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var prompt = new BiometricPrompt.Builder(this)
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.SetNegativeButton("Annuleren", MainExecutor, callback)
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.SetTitle("Bewijs jezelf met je vingerafdruk")
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.SetSubtitle("We willen zeker weten dat je niet Colinde bent")
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.SetAllowedAuthenticators(BiometricStrong)
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.Build();
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var cancellation = new CancellationSignal();
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prompt.Authenticate(cancellation, MainExecutor, callback);
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return;
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}
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action();
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}
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private void WakePc()
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{
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byte[] macAddress = [0x2c, 0x4d, 0x54, 0x4d, 0x10, 0x0f];
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var magicPacket = new byte[102];
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// Fill first 6 bytes with 0xFF
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for (var i = 0; i < 6; i++)
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{
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magicPacket[i] = 0xFF;
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}
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// Repeat MAC address 16 times
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for (var i = 1; i <= 16; i++)
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{
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for (var j = 0; j < 6; j++)
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{
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magicPacket[i * 6 + j] = macAddress[j];
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}
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}
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using var client = new UdpClient();
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client.EnableBroadcast = true;
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var endpoint = new IPEndPoint(IPAddress.Broadcast, 9); // 255.255.255.255 port 9
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for (var i = 0; i < 5; i++)
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{
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// Try 5 times
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client.Send(magicPacket, magicPacket.Length, endpoint);
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}
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Toast.MakeText(this, "Computer started!", ToastLength.Long)!.Show();
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}
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}
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/// <summary>
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/// Biometric authentication callbacks
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/// https://developer.android.com/identity/sign-in/biometric-auth#java
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/// </summary>
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class BiometricCallback : BiometricPrompt.AuthenticationCallback, IDialogInterfaceOnClickListener
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{
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private Context _context;
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private readonly Action _onSuccess;
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public BiometricCallback(Context context, Action onSuccess)
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{
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_context = context;
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_onSuccess = onSuccess;
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}
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public override void OnAuthenticationError(BiometricErrorCode errorCode, ICharSequence? errString)
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{
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Toast.MakeText(_context, $"Authenticatie mislukt: {errorCode}, {errString?.ToString()}", ToastLength.Long)!.Show();
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}
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public override void OnAuthenticationSucceeded(BiometricPrompt.AuthenticationResult? result)
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{
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Toast.MakeText(_context, "Authentication succeeded!", ToastLength.Short)!.Show();
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_onSuccess();
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}
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public override void OnAuthenticationFailed()
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{
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Toast.MakeText(_context, "Authenticatie mislukt!", ToastLength.Long)!.Show();
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}
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public void OnClick(IDialogInterface? dialog, int which)
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{
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Toast.MakeText(_context, "Geannuleerd!", ToastLength.Long)!.Show();
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}
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} |