added biometric auth for use

zVolt · Nov 25, 2021 · 43ff812 · 43ff812
1 parent e99e5a1
commit 43ff812
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Showing 4 changed files with 121 additions and 18 deletions.
diff --git a/app/build.gradle b/app/build.gradle
@@ -102,11 +102,11 @@ dependencies {
     annotationProcessor 'com.github.bumptech.glide:compiler:4.10.0'
 
     implementation 'com.github.tgio:rncryptor-native:0.0.9'
+
     implementation 'com.github.PhilJay:MPAndroidChart:v3.1.0'
-    //guava-android
-//    implementation 'com.google.guava:guava:23.4-android'
 
-    //implementation 'com.github.PhilJay:MPAndroidChart:v3.0.2'
+    //guava-android
+    //implementation 'com.google.guava:guava:23.4-android'
 
     //for registering watch on gmail
     implementation 'pub.devrel:easypermissions:3.0.0'
@@ -117,6 +117,9 @@ dependencies {
         exclude group: 'org.apache.httpcomponents'
     }
 
+    //    biometric
+    implementation "androidx.biometric:biometric:1.1.0"
+
     //JUnit 4 framework
     testImplementation 'junit:junit:4.13.1'
     // Robolectric environment

diff --git a/app/src/main/java/io/github/zkhan93/familyfinance/App.java b/app/src/main/java/io/github/zkhan93/familyfinance/App.java
@@ -1,11 +1,26 @@
 package io.github.zkhan93.familyfinance;
 
+import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
+import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;
+
 import android.app.Application;
+import android.content.SharedPreferences;
+import android.os.Build;
+import android.preference.PreferenceManager;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.biometric.BiometricPrompt;
+import androidx.core.content.ContextCompat;
+import androidx.fragment.app.FragmentActivity;
 
 import com.google.firebase.database.FirebaseDatabase;
 
 import org.greenrobot.greendao.database.Database;
 
+import java.util.concurrent.Executor;
+
 import io.github.zkhan93.familyfinance.models.DaoMaster;
 import io.github.zkhan93.familyfinance.models.DaoSession;
 
@@ -17,10 +32,16 @@ public class App extends Application {
     public static final boolean ENCRYPTED = false;
     private DaoSession daoSession;
 
+    private Executor executor;
+    private BiometricPrompt biometricPrompt;
+    private BiometricPrompt.PromptInfo promptInfo;
+    private SharedPreferences spf;
+    private static String TAG = App.class.getSimpleName();
+
     @Override
     public void onCreate() {
         super.onCreate();
-
+        spf = PreferenceManager.getDefaultSharedPreferences(this);
         FirebaseDatabase.getInstance().setPersistenceEnabled(true);
 
         DaoMaster.DevOpenHelper helper = new DaoMaster.DevOpenHelper(this,
@@ -34,4 +55,63 @@ public void onCreate() {
     public DaoSession getDaoSession() {
         return daoSession;
     }
+
+    public void setBiometricAuthValidFromTimeToNow() {
+        spf.edit().putLong(getString(R.string.pref_success_biometric_auth_at),
+                System.currentTimeMillis()).apply();
+    }
+
+    public void requestBiometricAuth(FragmentActivity activity) {
+        long biometricAuthThreshold = 10 * 1000;
+        long lastAuthAt = spf.getLong(getString(R.string.pref_success_biometric_auth_at), 0);
+        if (lastAuthAt > System.currentTimeMillis() - biometricAuthThreshold) {
+            setBiometricAuthValidFromTimeToNow();
+            return;
+        }
+        //only if its not very recent
+        executor = ContextCompat.getMainExecutor(this);
+        biometricPrompt = new BiometricPrompt(activity,
+                executor, new BiometricPrompt.AuthenticationCallback() {
+            @Override
+            public void onAuthenticationError(int errorCode,
+                                              @NonNull CharSequence errString) {
+                super.onAuthenticationError(errorCode, errString);
+                Toast.makeText(getApplicationContext(),
+                        "Authentication is required to use the app!", Toast.LENGTH_SHORT)
+                        .show();
+                Log.d(TAG, errString.toString());
+                activity.finish();
+            }
+
+            @Override
+            public void onAuthenticationSucceeded(
+                    @NonNull BiometricPrompt.AuthenticationResult result) {
+                super.onAuthenticationSucceeded(result);
+                setBiometricAuthValidFromTimeToNow();
+
+            }
+
+            @Override
+            public void onAuthenticationFailed() {
+                super.onAuthenticationFailed();
+                Toast.makeText(getApplicationContext(), "Authentication failed",
+                        Toast.LENGTH_SHORT)
+                        .show();
+            }
+        });
+
+        BiometricPrompt.PromptInfo.Builder builder = new BiometricPrompt.PromptInfo.Builder()
+                .setTitle("Biometric login for my app")
+                .setSubtitle("Log in using your biometric credential")
+                .setNegativeButtonText(getString(R.string.cancel));
+        if (Build.VERSION.SDK_INT > 29) {
+            builder = builder.setAllowedAuthenticators(BIOMETRIC_STRONG | DEVICE_CREDENTIAL);
+        }
+        promptInfo = builder.build();
+
+        // Prompt appears when user clicks "Log in".
+        // Consider integrating with the keystore to unlock cryptographic operations,
+        // if needed by your app.
+        biometricPrompt.authenticate(promptInfo);
+    }
 }
diff --git a/app/src/main/java/io/github/zkhan93/familyfinance/HomeActivity.java b/app/src/main/java/io/github/zkhan93/familyfinance/HomeActivity.java
@@ -1,26 +1,26 @@
 package io.github.zkhan93.familyfinance;
 
+import static androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_STRONG;
+import static androidx.biometric.BiometricManager.Authenticators.DEVICE_CREDENTIAL;
+import static io.github.zkhan93.familyfinance.FragmentMembers.PERMISSION_REQUEST_CODE;
+
 import android.content.Intent;
+import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Bundle;
 import android.preference.PreferenceManager;
 import android.util.Log;
 import android.view.View;
 import android.widget.ImageButton;
 import android.widget.ImageView;
 import android.widget.TextView;
+import android.widget.Toast;
 
-import com.bumptech.glide.Glide;
-import com.bumptech.glide.request.RequestOptions;
-import com.firebase.ui.auth.AuthUI;
-import com.google.android.material.appbar.AppBarLayout;
-import com.google.android.material.floatingactionbutton.FloatingActionButton;
-import com.google.android.material.navigation.NavigationView;
-import com.google.firebase.auth.FirebaseAuth;
-import com.google.firebase.auth.FirebaseUser;
-
+import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
+import androidx.biometric.BiometricPrompt;
 import androidx.core.app.ActivityCompat;
 import androidx.core.content.ContextCompat;
 import androidx.drawerlayout.widget.DrawerLayout;
@@ -29,9 +29,19 @@
 import androidx.navigation.Navigation;
 import androidx.navigation.ui.AppBarConfiguration;
 import androidx.navigation.ui.NavigationUI;
-import io.github.zkhan93.familyfinance.vm.AppState;
 
-import static io.github.zkhan93.familyfinance.FragmentMembers.PERMISSION_REQUEST_CODE;
+import com.bumptech.glide.Glide;
+import com.bumptech.glide.request.RequestOptions;
+import com.firebase.ui.auth.AuthUI;
+import com.google.android.material.appbar.AppBarLayout;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.google.android.material.navigation.NavigationView;
+import com.google.firebase.auth.FirebaseAuth;
+import com.google.firebase.auth.FirebaseUser;
+
+import java.util.concurrent.Executor;
+
+import io.github.zkhan93.familyfinance.vm.AppState;
 
 public class HomeActivity extends AppCompatActivity implements AppBarConfiguration.OnNavigateUpListener {
 
@@ -54,14 +64,15 @@ public class HomeActivity extends AppCompatActivity implements AppBarConfigurati
     private View.OnClickListener fabClickListener;
     private NavController navController;
     private AppState appState;
+    private SharedPreferences spf;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         appState = new ViewModelProvider(this).get(AppState.class);
         setContentView(R.layout.activity_home);
-        familyId =
-                PreferenceManager.getDefaultSharedPreferences(this).getString(getString(R.string.pref_family_id), null);
+        spf = PreferenceManager.getDefaultSharedPreferences(this);
+        familyId = spf.getString(getString(R.string.pref_family_id), null);
         initListeners();
         setUpViewRef();
         setSupportActionBar(toolbar);
@@ -74,14 +85,22 @@ protected void onCreate(Bundle savedInstanceState) {
             else
                 fab.hide();
         });
+
+
     }
 
     @Override
     protected void onStart() {
         super.onStart();
         checkRequiredPermissions();
+        ((App)getApplication()).requestBiometricAuth(this);
     }
 
+    @Override
+    protected void onResume() {
+        super.onResume();
+        ((App)getApplication()).requestBiometricAuth(this);
+    }
 
     private void checkRequiredPermissions() {
         int permissionCheck = ContextCompat.checkSelfPermission(this, android.Manifest
@@ -92,7 +111,7 @@ private void checkRequiredPermissions() {
             if (ActivityCompat.shouldShowRequestPermissionRationale(this, android.Manifest
                     .permission.RECEIVE_SMS)) {
                 //explain the need of this permission
-                //todo show a dialog and then on positive show request permission
+                //TODO: show a dialog and then on positive show request permission
                 Log.d(TAG, "lol we need it :D");
                 ActivityCompat.requestPermissions(this, new String[]{
                         android.Manifest.permission.RECEIVE_SMS, android.Manifest.permission

diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
@@ -141,6 +141,7 @@
     <string name="pref_key_autolock" translatable="false">pref_key_autolock</string>
     <string name="pref_key_allsms">pref_key_allsms</string>
     <string name="pref_family_id">familyId</string>
+    <string name="pref_success_biometric_auth_at">success_biometric_auth_at</string>