154 lines
4.3 KiB
C#
154 lines
4.3 KiB
C#
using System;
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using Android;
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using Android.App;
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using Android.Content;
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using Android.Content.PM;
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using Android.Hardware.Fingerprints;
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using Android.Runtime;
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using Android.Views;
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using Android.Widget;
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using Android.OS;
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using Android.Preferences;
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using Android.Support.V7.App;
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using keepass2android;
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namespace FingerprintTest
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{
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[Activity(Label = "FingerprintTest", MainLauncher = true, Icon = "@drawable/icon", Theme = "@style/Theme.AppCompat")]
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public class MainActivity : AppCompatActivity
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{
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int count = 1;
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private string _keyId = "mykeyid";
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const int FINGERPRINT_PERMISSION_REQUEST_CODE = 0;
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protected override void OnCreate(Bundle bundle)
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{
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base.OnCreate(bundle);
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// Set our view from the "main" layout resource
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SetContentView(Resource.Layout.Main);
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// Get our button from the layout resource,
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// and attach an event to it
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Button button = FindViewById<Button>(Resource.Id.MyButton);
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button.Visibility = ViewStates.Gone;
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RequestPermissions(new[] { Manifest.Permission.UseFingerprint }, FINGERPRINT_PERMISSION_REQUEST_CODE);
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}
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string prefKey = "enc_pref_key";
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public override void OnRequestPermissionsResult(int requestCode, string[] permissions, Permission[] grantResults)
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{
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if (requestCode == FINGERPRINT_PERMISSION_REQUEST_CODE && grantResults[0] == Android.Content.PM.Permission.Granted)
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{
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Button encButton = FindViewById<Button>(Resource.Id.MyButton);
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Button decButton = FindViewById<Button>(Resource.Id.Decrypt);
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encButton.Visibility = ViewStates.Visible;
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encButton.Enabled = true;
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var fingerprint = new keepass2android.FingerprintModule(this);
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encButton.Click += (sender, args) =>
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{
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var fingerprintEnc = new FingerprintEncryption(fingerprint, _keyId);
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if (fingerprintEnc.InitCipher())
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{
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fingerprintEnc.StartListening(new EncryptionCallback(this, fingerprintEnc, prefKey));
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}
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else
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{
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Toast.MakeText(this, "Error initiating cipher", ToastLength.Long).Show();
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}
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};
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decButton.Click += (sender, args) =>
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{
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var fingerprintDec = new FingerprintDecryption(fingerprint, _keyId, this, prefKey);
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if (fingerprintDec.InitCipher())
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{
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fingerprintDec.StartListening(new DecryptionCallback(this, fingerprintDec,prefKey));
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}
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else
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{
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Toast.MakeText(this, "Error initiating cipher", ToastLength.Long).Show();
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}
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};
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if (!fingerprint.KeyguardManager.IsKeyguardSecure)
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{
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encButton.Enabled = false;
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// Show a message that the user hasn't set up a fingerprint or lock screen.
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Toast.MakeText(this, "Secure lock screen hasn't set up.\n"
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+ "Go to 'Settings -> Security -> Fingerprint' to set up a fingerprint", ToastLength.Long).Show();
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return;
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}
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if (!fingerprint.FingerprintManager.HasEnrolledFingerprints)
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{
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encButton.Enabled = false;
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// This happens when no fingerprints are registered.
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Toast.MakeText(this, "Go to 'Settings -> Security -> Fingerprint' " +
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"and register at least one fingerprint", ToastLength.Long).Show();
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return;
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}
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}
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}
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}
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public class DecryptionCallback : FingerprintManager.AuthenticationCallback
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{
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private readonly Context _context;
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private readonly FingerprintDecryption _fingerprintDec;
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private readonly string _prefKey;
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public DecryptionCallback(Context context, FingerprintDecryption fingerprintDec, string prefKey)
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{
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_context = context;
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_fingerprintDec = fingerprintDec;
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_prefKey = prefKey;
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}
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public override void OnAuthenticationSucceeded(FingerprintManager.AuthenticationResult result)
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{
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var prefs = PreferenceManager.GetDefaultSharedPreferences(Application.Context);
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Toast.MakeText(_context, _fingerprintDec.DecryptStored(_prefKey), ToastLength.Long).Show();
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}
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}
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public class EncryptionCallback : FingerprintManager.AuthenticationCallback
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{
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private readonly FingerprintCrypt _fingerprintEnc;
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private readonly string _prefKey;
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public EncryptionCallback(Context context, FingerprintCrypt fingerprintEnc, string prefKey)
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{
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_fingerprintEnc = fingerprintEnc;
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_prefKey = prefKey;
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}
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public override void OnAuthenticationSucceeded(FingerprintManager.AuthenticationResult result)
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{
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_fingerprintEnc.StoreEncrypted("some töst data", _prefKey, Application.Context);
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}
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}
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}
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