Bug fixes, Implement backups (WIP)

app/src/main/java/com/cringe_studios/cringe_authenticator/MainActivity.java

@@ -1,6 +1,7 @@
 package com.cringe_studios.cringe_authenticator;
 
 import android.content.res.Configuration;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.Menu;
 import android.view.MenuItem;
@@ -15,6 +16,7 @@ import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AlertDialog;
+import androidx.core.util.Consumer;
 import androidx.fragment.app.Fragment;
 
 import com.cringe_studios.cringe_authenticator.databinding.ActivityMainBinding;
@@ -47,6 +49,14 @@ public class MainActivity extends BaseActivity {
 
     private ActivityResultLauncher<PickVisualMediaRequest> pickQRCodeImage;
 
+    private ActivityResultLauncher<String> pickBackupFileSave;
+
+    private Consumer<Uri> pickBackupFileSaveCallback;
+
+    private ActivityResultLauncher<String[]> pickBackupFileLoad;
+
+    private Consumer<Uri> pickBackupFileLoadCallback;
+
     private QRScanner qrScanner;
 
     private boolean fullyLaunched;
@@ -116,6 +126,20 @@ public class MainActivity extends BaseActivity {
             }
         });
 
+        pickBackupFileSave = registerForActivityResult(new ActivityResultContracts.CreateDocument("application/json"), doc -> {
+            if(pickBackupFileSaveCallback != null) {
+                pickBackupFileSaveCallback.accept(doc);
+                pickBackupFileSaveCallback = null;
+            }
+        });
+
+        pickBackupFileLoad = registerForActivityResult(new ActivityResultContracts.OpenDocument(), doc -> {
+            if(pickBackupFileLoadCallback != null) {
+                pickBackupFileLoadCallback.accept(doc);
+                pickBackupFileLoadCallback = null;
+            }
+        });
+
         OTPDatabase.promptLoadDatabase(this, this::launchApp, this::finishAffinity);
     }
 
@@ -308,6 +332,24 @@ public class MainActivity extends BaseActivity {
         OTPDatabase.promptLoadDatabase(this, () -> {}, () -> {});
     }
 
+    public void promptPickBackupFileSave(String name, Consumer<Uri> callback) {
+        this.lockOnPause = false;
+        this.pickBackupFileSaveCallback = uri -> {
+            lockOnPause = true;
+            callback.accept(uri);
+        };
+        pickBackupFileSave.launch(name);
+    }
+
+    public void promptPickBackupFileLoad(Consumer<Uri> callback) {
+        this.lockOnPause = false;
+        this.pickBackupFileLoadCallback = uri -> {
+            lockOnPause = true;
+            callback.accept(uri);
+        };
+        pickBackupFileLoad.launch(new String[]{"application/json"});
+    }
+
     @Override
     public void recreate() {
         lockOnPause = false;

app/src/main/java/com/cringe_studios/cringe_authenticator/fragment/GroupFragment.java

@@ -111,16 +111,10 @@ public class GroupFragment extends NamedFragment {
             OTPListItem vh = (OTPListItem) binding.itemList.findViewHolderForAdapterPosition(i);
             if(vh == null) continue;
             try {
-                vh.getBinding().otpCode.setText(OTPListItem.formatCode(vh.getOTPData().getPin()));
+                vh.refresh();
             } catch (Exception e) {
                 DialogUtil.showErrorDialog(requireContext(), e.getMessage() == null ? "An error occurred while refreshing the code" : e.getMessage());
             }
-
-            if(vh.getOTPData().getType() == OTPType.TOTP) {
-                long timeDiff = vh.getOTPData().getNextDueTime() - System.currentTimeMillis() / 1000;
-                double progress = 1 - ((double) timeDiff / vh.getOTPData().getPeriod());
-                vh.getBinding().progress.setImageLevel((int) (progress * 10_000));
-            }
         }
     }
 

app/src/main/java/com/cringe_studios/cringe_authenticator/fragment/SettingsFragment.java

@@ -1,5 +1,6 @@
 package com.cringe_studios.cringe_authenticator.fragment;
 
+import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -19,13 +20,19 @@ import com.cringe_studios.cringe_authenticator.crypto.CryptoException;
 import com.cringe_studios.cringe_authenticator.crypto.CryptoParameters;
 import com.cringe_studios.cringe_authenticator.databinding.FragmentSettingsBinding;
 import com.cringe_studios.cringe_authenticator.util.Appearance;
+import com.cringe_studios.cringe_authenticator.util.BackupException;
+import com.cringe_studios.cringe_authenticator.util.BackupUtil;
 import com.cringe_studios.cringe_authenticator.util.BiometricUtil;
 import com.cringe_studios.cringe_authenticator.util.DialogUtil;
 import com.cringe_studios.cringe_authenticator.util.OTPDatabase;
 import com.cringe_studios.cringe_authenticator.util.OTPDatabaseException;
 import com.cringe_studios.cringe_authenticator.util.SettingsUtil;
+import com.cringe_studios.cringe_authenticator.util.StyledDialogBuilder;
 import com.cringe_studios.cringe_authenticator.util.Theme;
 
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
 import java.util.Arrays;
 import java.util.Locale;
 
@@ -74,7 +81,7 @@ public class SettingsFragment extends NamedFragment {
         binding.settingsEnableEncryption.setChecked(SettingsUtil.isDatabaseEncrypted(requireContext()));
         binding.settingsEnableEncryption.setOnCheckedChangeListener((view, checked) -> {
             if(checked) {
-                DialogUtil.showInputPasswordDialog(requireContext(), password -> {
+                DialogUtil.showSetPasswordDialog(requireContext(), password -> {
                     CryptoParameters params = CryptoParameters.createNew();
                     Log.d("Crypto", "Created new crypto params");
 
@@ -191,9 +198,83 @@ public class SettingsFragment extends NamedFragment {
             public void onNothingSelected(AdapterView<?> parent) {}
         });
 
+        binding.settingsCreateBackup.setOnClickListener(view -> {
+            new StyledDialogBuilder(requireContext())
+                    .setItems(new String[]{"Create with current password", "Create with custom password"}, (d, which) -> {
+                        switch(which) {
+                            case 0:
+                                OTPDatabase.promptLoadDatabase(requireActivity(), () -> {
+                                    SecretKey key = OTPDatabase.getLoadedKey();
+                                    CryptoParameters parameters = SettingsUtil.getCryptoParameters(requireContext());
+                                    createBackup(key, parameters);
+                                }, null);
+                                break;
+                            case 1:
+                                DialogUtil.showSetPasswordDialog(requireContext(), password -> {
+                                    CryptoParameters parameters = CryptoParameters.createNew();
+                                    try {
+                                        SecretKey key = Crypto.generateKey(parameters, password);
+                                        createBackup(key, parameters);
+                                    } catch (CryptoException e) {
+                                        DialogUtil.showErrorDialog(requireContext(), e.toString());
+                                    }
+                                }, null);
+                                break;
+                        }
+                    })
+                    .show();
+        });
+
+        binding.settingsLoadBackup.setOnClickListener(view -> {
+            ((MainActivity) requireActivity()).promptPickBackupFileLoad(uri -> {
+                if(uri == null || uri.getPath() == null) return;
+
+                loadBackup(uri);
+            });
+        });
+
         return binding.getRoot();
     }
 
+    private void createBackup(SecretKey key, CryptoParameters parameters) {
+        ((MainActivity) requireActivity()).promptPickBackupFileSave(BackupUtil.getBackupName(), uri -> {
+            if(uri == null || uri.getPath() == null) return;
+
+            try {
+                BackupUtil.saveBackup(requireContext(), uri, key, parameters);
+            } catch (BackupException | CryptoException e) {
+                DialogUtil.showErrorDialog(requireContext(), e.toString());
+            }
+        });
+    }
+
+    private void loadBackup(Uri uri) {
+        OTPDatabase.promptLoadDatabase(requireActivity(), () -> {
+            try {
+                SecretKey key = OTPDatabase.getLoadedKey();
+                CryptoParameters parameters = SettingsUtil.getCryptoParameters(requireContext());
+                loadBackup(uri, key, parameters);
+            } catch (CryptoException e) {
+                DialogUtil.showInputPasswordDialog(requireContext(), password -> {
+                    try {
+                        CryptoParameters parameters = BackupUtil.loadParametersFromBackup(requireContext(), uri);
+                        SecretKey key = Crypto.generateKey(parameters, password);
+                        loadBackup(uri, key, parameters);
+                    } catch (BackupException | OTPDatabaseException | CryptoException e2) {
+                        DialogUtil.showErrorDialog(requireContext(), "Failed to load backup", e2);
+                    }
+                }, null);
+            } catch(BackupException | OTPDatabaseException e) {
+                DialogUtil.showErrorDialog(requireContext(), "Failed to load backup", e);
+            }
+        }, null);
+    }
+
+    private void loadBackup(Uri uri, SecretKey key, CryptoParameters parameters) throws BackupException, OTPDatabaseException, CryptoException {
+        OTPDatabase db = BackupUtil.loadBackup(requireContext(), uri, key, parameters);
+        DialogUtil.showErrorDialog(requireContext(), "Success: " + db);
+    }
+
     @Override
     public void onDestroyView() {
         super.onDestroyView();

app/src/main/java/com/cringe_studios/cringe_authenticator/otplist/OTPListAdapter.java

@@ -68,7 +68,7 @@ public class OTPListAdapter extends RecyclerView.Adapter<OTPListItem> {
         holder.setSelected(false);
 
         try {
-            holder.getBinding().otpCode.setText(OTPListItem.formatCode(data.getPin()));
+            holder.refresh();
         } catch (OTPException e) {
             DialogUtil.showErrorDialog(context, context.getString(R.string.otp_add_error, e.getMessage() != null ? e.getMessage() : e.toString()));
         }
@@ -87,7 +87,7 @@ public class OTPListAdapter extends RecyclerView.Adapter<OTPListItem> {
                 data.incrementCounter();
 
                 try {
-                    holder.getBinding().otpCode.setText(OTPListItem.formatCode(data.getPin()));
+                    holder.refresh();
                 } catch (OTPException e) {
                     DialogUtil.showErrorDialog(context, context.getString(R.string.otp_add_error, e.getMessage() != null ? e.getMessage() : e.toString()));
                     return;

app/src/main/java/com/cringe_studios/cringe_authenticator/otplist/OTPListItem.java

@@ -10,6 +10,8 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.cringe_studios.cringe_authenticator.R;
 import com.cringe_studios.cringe_authenticator.databinding.OtpCodeBinding;
 import com.cringe_studios.cringe_authenticator.model.OTPData;
+import com.cringe_studios.cringe_authenticator_library.OTPException;
+import com.cringe_studios.cringe_authenticator_library.OTPType;
 
 public class OTPListItem extends RecyclerView.ViewHolder {
 
@@ -36,6 +38,16 @@ public class OTPListItem extends RecyclerView.ViewHolder {
         return otpData;
     }
 
+    public void refresh() throws OTPException {
+        binding.otpCode.setText(OTPListItem.formatCode(otpData.getPin()));
+
+        if(otpData.getType() == OTPType.TOTP) {
+            long timeDiff = otpData.getNextDueTime() - System.currentTimeMillis() / 1000;
+            double progress = 1 - ((double) timeDiff / otpData.getPeriod());
+            binding.progress.setImageLevel((int) (progress * 10_000));
+        }
+    }
+
     public static String formatCode(String code) {
         // TODO: add setting for group size (and enable/disable grouping)
         StringBuilder b = new StringBuilder();

app/src/main/java/com/cringe_studios/cringe_authenticator/util/BackupUtil.java

@@ -1,66 +1,70 @@
 package com.cringe_studios.cringe_authenticator.util;
 
+import android.content.Context;
+import android.net.Uri;
 import android.util.Base64;
 
-import com.cringe_studios.cringe_authenticator.crypto.Crypto;
 import com.cringe_studios.cringe_authenticator.crypto.CryptoException;
 import com.cringe_studios.cringe_authenticator.crypto.CryptoParameters;
-import com.cringe_studios.cringe_authenticator.model.OTPData;
+import com.google.gson.JsonElement;
 import com.google.gson.JsonObject;
+import com.google.gson.JsonSyntaxException;
 
-import org.bouncycastle.jcajce.provider.symmetric.ARC4;
-import org.json.JSONObject;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileNotFoundException;
-import java.io.FileOutputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.nio.charset.StandardCharsets;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.Locale;
 
 import javax.crypto.SecretKey;
 
 public class BackupUtil {
 
-    public static void saveBackup(File backupFile, SecretKey key, CryptoParameters parameters) throws BackupException, CryptoException {
+    private static final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.ENGLISH);
-        if(!OTPDatabase.isDatabaseLoaded()) throw new BackupException("Database is not loaded");
 
-        if(!backupFile.exists()) {
+    public static String getBackupName() {
-            File parent = backupFile.getParentFile();
+        return "backup_" + FORMAT.format(new Date()); // TODO: indicate Cringe Authenticator
-            if(parent != null && !parent.exists()) parent.mkdirs();
+    }
-            try {
+
-                backupFile.createNewFile();
+    public static void saveBackup(Context context, Uri backupFile, SecretKey key, CryptoParameters parameters) throws BackupException, CryptoException {
-            } catch (IOException e) {
+        if(!OTPDatabase.isDatabaseLoaded()) throw new BackupException("Database is not loaded");
-                throw new BackupException(e);
-            }
-        }
 
         byte[] dbBytes = OTPDatabase.convertToEncryptedBytes(OTPDatabase.getLoadedDatabase(), key, parameters);
         JsonObject object = new JsonObject();
         object.add("parameters", SettingsUtil.GSON.toJsonTree(parameters));
         object.addProperty("database", Base64.encodeToString(dbBytes, Base64.DEFAULT));
-        try(FileOutputStream fOut = new FileOutputStream(backupFile)) {
+        try(OutputStream out = context.getContentResolver().openOutputStream(backupFile)) {
-            fOut.write(object.toString().getBytes(StandardCharsets.UTF_8));
+            if(out == null) throw new BackupException("Failed to write backup");
+            out.write(object.toString().getBytes(StandardCharsets.UTF_8));
+        }catch(IOException e) {
+            throw new BackupException(e);
+        }
+    }
+
+    public static CryptoParameters loadParametersFromBackup(Context context, Uri backupFile) throws BackupException {
+        try(InputStream in = context.getContentResolver().openInputStream(backupFile)) {
+            if(in == null) throw new BackupException("Failed to read backup file");
+            byte[] backupBytes = IOUtil.readBytes(in);
+            JsonObject object = SettingsUtil.GSON.fromJson(new String(backupBytes, StandardCharsets.UTF_8), JsonObject.class);
+            return SettingsUtil.GSON.fromJson(object.get("parameters"), CryptoParameters.class); // TODO: check if params are valid
         } catch (IOException e) {
             throw new BackupException(e);
         }
     }
 
-    public static CryptoParameters loadParametersFromBackup(File backupFile) throws BackupException {
+    public static OTPDatabase loadBackup(Context context, Uri backupFile, SecretKey key, CryptoParameters parameters) throws BackupException, OTPDatabaseException, CryptoException {
-        try {
+        try(InputStream in = context.getContentResolver().openInputStream(backupFile)) {
-            byte[] backupBytes = IOUtil.readBytes(backupFile);
+            if (in == null) throw new BackupException("Failed to read backup file");
+            byte[] backupBytes = IOUtil.readBytes(in);
             JsonObject object = SettingsUtil.GSON.fromJson(new String(backupBytes, StandardCharsets.UTF_8), JsonObject.class);
-            return SettingsUtil.GSON.fromJson(object.get("parameters"), CryptoParameters.class);
+            JsonElement db = object.get("database");
-        } catch (IOException e) {
+            if(db == null) throw new BackupException("Invalid backup file");
-            throw new BackupException(e);
+            return OTPDatabase.loadFromEncryptedBytes(Base64.decode(db.getAsString(), Base64.DEFAULT), key, parameters);
-        }
+        } catch(JsonSyntaxException e) {
-    }
+            throw new BackupException("Invalid JSON", e);
-
-    public static OTPDatabase loadBackup(File backupFile, SecretKey key, CryptoParameters parameters) throws BackupException, OTPDatabaseException, CryptoException {
-        try {
-            byte[] backupBytes = IOUtil.readBytes(backupFile);
-            JsonObject object = SettingsUtil.GSON.fromJson(new String(backupBytes, StandardCharsets.UTF_8), JsonObject.class);
-            return OTPDatabase.loadFromEncryptedBytes(Base64.decode(object.get("database").getAsString(), Base64.DEFAULT), key, parameters);
         } catch (IOException e) {
             throw new BackupException(e);
         }

app/src/main/java/com/cringe_studios/cringe_authenticator/util/DialogUtil.java

@@ -16,6 +16,7 @@ import com.cringe_studios.cringe_authenticator.R;
 import com.cringe_studios.cringe_authenticator.databinding.DialogCreateGroupBinding;
 import com.cringe_studios.cringe_authenticator.databinding.DialogInputCodeHotpBinding;
 import com.cringe_studios.cringe_authenticator.databinding.DialogInputCodeTotpBinding;
+import com.cringe_studios.cringe_authenticator.databinding.DialogSetPasswordBinding;
 import com.cringe_studios.cringe_authenticator.model.OTPData;
 import com.cringe_studios.cringe_authenticator_library.OTPAlgorithm;
 import com.cringe_studios.cringe_authenticator_library.OTPType;
@@ -56,7 +57,11 @@ public class DialogUtil {
     }
 
     public static void showErrorDialog(Context context, String errorMessage) {
-        showErrorDialog(context, errorMessage, null);
+        showErrorDialog(context, errorMessage, (Runnable) null);
+    }
+
+    public static void showErrorDialog(Context context, String errorMessage, Exception exception) {
+        showErrorDialog(context, errorMessage + ": " + exception.toString(), (Runnable) null); // TODO: exception details button
     }
 
     public static void showTOTPDialog(LayoutInflater inflater, OTPData initialData, Consumer<OTPData> callback, boolean view) {
@@ -266,6 +271,40 @@ public class DialogUtil {
         dialog.show();
     }
 
+    public static void showSetPasswordDialog(Context context, Consumer<String> callback, Runnable onCancel) {
+        DialogSetPasswordBinding binding = DialogSetPasswordBinding.inflate(LayoutInflater.from(context));
+
+        AlertDialog dialog = new StyledDialogBuilder(context)
+                .setTitle(R.string.set_password)
+                .setView(binding.getRoot())
+                .setPositiveButton("Ok", (d, which) -> {})
+                .setNegativeButton(R.string.cancel, (d, which) -> { if(onCancel != null) onCancel.run(); })
+                .setOnCancelListener(d -> { if(onCancel != null) onCancel.run(); })
+                .create();
+
+        dialog.setOnShowListener(d -> {
+            Button okButton = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
+            okButton.setOnClickListener(v -> {
+                if(binding.setPassword.getText().length() == 0) {
+                    DialogUtil.showErrorDialog(context, "You need to enter a password");
+                    return;
+                }
+
+                String pass = binding.setPassword.getText().toString();
+                String confirm = binding.confirmPassword.getText().toString();
+                if(!pass.equals(confirm)) {
+                    DialogUtil.showErrorDialog(context, "The passwords do not match");
+                    return;
+                }
+
+                dialog.dismiss();
+                callback.accept(pass);
+            });
+        });
+
+        dialog.show();
+    }
+
     public static void showInputPasswordDialog(Context context, Consumer<String> callback, Runnable onCancel) {
         EditText passwordField = new EditText(context);
         passwordField.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);

app/src/main/java/com/cringe_studios/cringe_authenticator/util/IOUtil.java

@@ -1,13 +1,12 @@
 package com.cringe_studios.cringe_authenticator.util;
 
+import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileInputStream;
-import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.ByteBuffer;
-import java.nio.file.Files;
 
 public class IOUtil {
 
@@ -24,6 +23,17 @@ public class IOUtil {
         }
     }
 
+    public static byte[] readBytes(InputStream in) throws IOException {
+        ByteArrayOutputStream bOut = new ByteArrayOutputStream();
+        byte[] buffer = new byte[1024];
+        int len;
+        while ((len = in.read(buffer)) > 0) {
+            bOut.write(buffer, 0, len);
+        }
+
+        return bOut.toByteArray();
+    }
+
     public static void writeBytes(File file, byte[] bytes) throws IOException {
         try(FileOutputStream fOut = new FileOutputStream(file)) {
             fOut.write(bytes);

app/src/main/java/com/cringe_studios/cringe_authenticator/util/OTPDatabase.java

@@ -94,15 +94,10 @@ public class OTPDatabase {
             }
         }
 
-        try(FileInputStream fIn = new FileInputStream(file)) {
+        try {
-            ByteBuffer fileBuffer = ByteBuffer.allocate((int) file.length());
+            byte[] bytes = IOUtil.readBytes(file);
-            byte[] buffer = new byte[1024];
-            int len;
-            while((len = fIn.read(buffer)) > 0) {
-                fileBuffer.put(buffer, 0, len);
-            }
 
-            loadedDatabase = loadFromEncryptedBytes(fileBuffer.array(), key, SettingsUtil.getCryptoParameters(context));
+            loadedDatabase = loadFromEncryptedBytes(bytes, key, SettingsUtil.getCryptoParameters(context));
             loadedKey = key;
             return loadedDatabase;
         }catch(IOException e) {

app/src/main/res/layout/dialog_set_password.xml

@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+    <TextView
+        android:id="@+id/set_password_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:text="@string/set_password"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <EditText
+        android:id="@+id/set_password"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:ems="10"
+        android:hint="@string/password"
+        android:inputType="textPassword"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/set_password_text" />
+
+    <TextView
+        android:id="@+id/confirm_password_text"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="10dp"
+        android:text="@string/confirm_password"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/set_password" />
+
+    <EditText
+        android:id="@+id/confirm_password"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:ems="10"
+        android:hint="@string/password"
+        android:inputType="textPassword"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/confirm_password_text" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/fragment_group.xml

@@ -8,7 +8,9 @@
 
     <androidx.constraintlayout.widget.ConstraintLayout
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:paddingTop="5dp"
+        android:paddingBottom="5dp">
 
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/itemList"

app/src/main/res/layout/fragment_settings.xml

@@ -77,5 +77,28 @@
             android:paddingTop="10dp"
             android:paddingBottom="10dp" />
 
+        <TextView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Backups" />
+        
+        <androidx.appcompat.widget.AppCompatButton
+            android:id="@+id/settings_create_backup"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@drawable/button_themed"
+            android:text="Create backup"
+            android:layout_marginTop="10dp"
+            android:textAllCaps="false" />
+
+        <androidx.appcompat.widget.AppCompatButton
+            android:id="@+id/settings_load_backup"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:background="@drawable/button_themed"
+            android:text="Load backup"
+            android:layout_marginTop="10dp"
+            android:textAllCaps="false" />
+
     </LinearLayout>
 </androidx.core.widget.NestedScrollView>

app/src/main/res/values-de-rDE/strings.xml

@@ -84,4 +84,10 @@
     <string name="appearance_follow_system">Systemstandard</string>
     <string name="appearance_light">Hell</string>
     <string name="appearance_dark">Dunkel</string>
+    <string name="backup_create_title">Backup erstellen</string>
+    <string-array name="backup_create">
+        <item>Mit aktuellem Passwort erstellen</item>
+        <item>Mit neuem Passwort erstellen</item>
+    </string-array>
+    <string name="backup_load_title">Backup laden</string>
 </resources>

app/src/main/res/values/strings.xml

@@ -33,7 +33,7 @@
     <string name="otp_delete_message">Do you want to delete the selected OTP(s)?</string>
     <string name="edit_group_title">Edit Group</string>
     <string name="settings_enable_intro_video">Enable intro video</string>
-    <string name="settings_biometric_lock">Require biometric unlock</string>
+    <string name="settings_biometric_lock">Use biometric unlock</string>
     <string name="uri_handler_code_added">Code added</string>
     <string name="uri_handler_add_code_title">Add Code</string>
     <string name="uri_handler_create_group">Create New Group</string>
@@ -53,8 +53,8 @@
     <string name="hide_codes">Hide Codes</string>
     <string name="enable_encryption">Enable encryption</string>
     <string name="password">Password</string>
-    <string name="set_password">set Password</string>
+    <string name="set_password">Set Password</string>
-    <string name="confirm_password">confirm Password</string>
+    <string name="confirm_password">Confirm Password</string>
     <string name="unlock_cringe_authenticator">Unlock Authenticator</string>
     <string name="unlock">Unlock</string>
     <string name="unlock_using_biometrics">Unlock using biometrics</string>
@@ -85,4 +85,10 @@
     <string name="appearance_dark">Dark</string>
     <string name="appearance_light">Light</string>
     <string name="appearance_follow_system">System default</string>
+    <string name="backup_create_title">Create backup</string>
+    <string-array name="backup_create">
+        <item>Create with current password</item>
+        <item>Create with new password</item>
+    </string-array>
+    <string name="backup_load_title">Load backup</string>
 </resources>