+++ /dev/null
-/*
- * Copyright © 2018-2019 Soren Stoutner <soren@stoutner.com>.
- *
- * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
- *
- * Privacy Browser is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Privacy Browser is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Privacy Browser. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.stoutner.privacybrowser.activities;
-
-import android.Manifest;
-import android.app.Activity;
-import android.content.Intent;
-import android.content.pm.PackageManager;
-import android.media.MediaScannerConnection;
-import android.net.Uri;
-import android.os.Build;
-import android.os.Bundle;
-import android.os.Environment;
-import android.provider.DocumentsContract;
-import android.text.Editable;
-import android.text.TextWatcher;
-import android.view.View;
-import android.view.WindowManager;
-import android.widget.AdapterView;
-import android.widget.ArrayAdapter;
-import android.widget.Button;
-import android.widget.EditText;
-import android.widget.LinearLayout;
-import android.widget.RadioButton;
-import android.widget.Spinner;
-import android.widget.TextView;
-
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.ActionBar;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.appcompat.widget.Toolbar;
-import androidx.cardview.widget.CardView;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-import androidx.core.content.FileProvider;
-import androidx.fragment.app.DialogFragment;
-
-import com.google.android.material.snackbar.Snackbar;
-import com.google.android.material.textfield.TextInputLayout;
-
-import com.stoutner.privacybrowser.R;
-import com.stoutner.privacybrowser.dialogs.StoragePermissionDialog;
-import com.stoutner.privacybrowser.helpers.ImportExportDatabaseHelper;
-
-import java.io.File;
-import java.io.FileInputStream;
-import java.io.FileOutputStream;
-import java.nio.charset.StandardCharsets;
-import java.security.MessageDigest;
-import java.security.SecureRandom;
-import java.util.Arrays;
-
-import javax.crypto.Cipher;
-import javax.crypto.CipherInputStream;
-import javax.crypto.CipherOutputStream;
-import javax.crypto.spec.GCMParameterSpec;
-import javax.crypto.spec.SecretKeySpec;
-
-public class ImportExportActivity extends AppCompatActivity implements StoragePermissionDialog.StoragePermissionDialogListener {
- // Create the encryption constants.
- private final int NO_ENCRYPTION = 0;
- private final int PASSWORD_ENCRYPTION = 1;
- private final int OPENPGP_ENCRYPTION = 2;
-
- // Create the activity result constants.
- private final int BROWSE_RESULT_CODE = 0;
- private final int OPENPGP_EXPORT_RESULT_CODE = 1;
-
- // `openKeychainInstalled` is accessed from an inner class.
- private boolean openKeychainInstalled;
-
- @Override
- public void onCreate(Bundle savedInstanceState) {
- // Disable screenshots if not allowed.
- if (!MainWebViewActivity.allowScreenshots) {
- getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
- }
-
- // Set the activity theme.
- if (MainWebViewActivity.darkTheme) {
- setTheme(R.style.PrivacyBrowserDark_SecondaryActivity);
- } else {
- setTheme(R.style.PrivacyBrowserLight_SecondaryActivity);
- }
-
- // Run the default commands.
- super.onCreate(savedInstanceState);
-
- // Set the content view.
- setContentView(R.layout.import_export_coordinatorlayout);
-
- // Use the `SupportActionBar` from `android.support.v7.app.ActionBar` until the minimum API is >= 21.
- Toolbar toolbar = findViewById(R.id.import_export_toolbar);
- setSupportActionBar(toolbar);
-
- // Get a handle for the action bar.
- ActionBar actionBar = getSupportActionBar();
-
- // Remove the incorrect lint warning that the action bar might be null.
- assert actionBar != null;
-
- // Display the home arrow on the support action bar.
- actionBar.setDisplayHomeAsUpEnabled(true);
-
- // Find out if we are running KitKat
- boolean runningKitKat = (Build.VERSION.SDK_INT == 19);
-
- // Find out if OpenKeychain is installed.
- try {
- openKeychainInstalled = !getPackageManager().getPackageInfo("org.sufficientlysecure.keychain", 0).versionName.isEmpty();
- } catch (PackageManager.NameNotFoundException exception) {
- openKeychainInstalled = false;
- }
-
- // Get handles for the views that need to be modified.
- Spinner encryptionSpinner = findViewById(R.id.encryption_spinner);
- TextInputLayout passwordEncryptionTextInputLayout = findViewById(R.id.password_encryption_textinputlayout);
- EditText encryptionPasswordEditText = findViewById(R.id.password_encryption_edittext);
- TextView kitKatPasswordEncryptionTextView = findViewById(R.id.kitkat_password_encryption_textview);
- TextView openKeychainRequiredTextView = findViewById(R.id.openkeychain_required_textview);
- CardView fileLocationCardView = findViewById(R.id.file_location_cardview);
- RadioButton importRadioButton = findViewById(R.id.import_radiobutton);
- RadioButton exportRadioButton = findViewById(R.id.export_radiobutton);
- LinearLayout fileNameLinearLayout = findViewById(R.id.file_name_linearlayout);
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
- TextView openKeychainImportInstructionsTextView = findViewById(R.id.openkeychain_import_instructions_textview);
- Button importExportButton = findViewById(R.id.import_export_button);
- TextView storagePermissionTextView = findViewById(R.id.import_export_storage_permission_textview);
-
- // Create an array adapter for the spinner.
- ArrayAdapter<CharSequence> encryptionArrayAdapter = ArrayAdapter.createFromResource(this, R.array.encryption_type, R.layout.spinner_item);
-
- // Set the drop down view resource on the spinner.
- encryptionArrayAdapter.setDropDownViewResource(R.layout.spinner_dropdown_items);
-
- // Set the array adapter for the spinner.
- encryptionSpinner.setAdapter(encryptionArrayAdapter);
-
- // Initially hide the unneeded views.
- passwordEncryptionTextInputLayout.setVisibility(View.GONE);
- kitKatPasswordEncryptionTextView.setVisibility(View.GONE);
- openKeychainRequiredTextView.setVisibility(View.GONE);
- fileNameLinearLayout.setVisibility(View.GONE);
- openKeychainImportInstructionsTextView.setVisibility(View.GONE);
- importExportButton.setVisibility(View.GONE);
-
- // Create strings for the default file paths.
- String defaultFilePath;
- String defaultPasswordEncryptionFilePath;
-
- // Set the default file paths according to the storage permission status.
- if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { // The storage permission has been granted.
- // Set the default file paths to use the external public directory.
- defaultFilePath = Environment.getExternalStorageDirectory() + "/" + getString(R.string.settings_pbs);
- defaultPasswordEncryptionFilePath = defaultFilePath + ".aes";
- } else { // The storage permission has not been granted.
- // Set the default file paths to use the external private directory.
- defaultFilePath = getApplicationContext().getExternalFilesDir(null) + "/" + getString(R.string.settings_pbs);
- defaultPasswordEncryptionFilePath = defaultFilePath + ".aes";
- }
-
- // Set the default file path.
- fileNameEditText.setText(defaultFilePath);
-
- // Display the encryption information when the spinner changes.
- encryptionSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
- @Override
- public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
- switch (position) {
- case NO_ENCRYPTION:
- // Hide the unneeded layout items.
- passwordEncryptionTextInputLayout.setVisibility(View.GONE);
- kitKatPasswordEncryptionTextView.setVisibility(View.GONE);
- openKeychainRequiredTextView.setVisibility(View.GONE);
- openKeychainImportInstructionsTextView.setVisibility(View.GONE);
-
- // Show the file location card.
- fileLocationCardView.setVisibility(View.VISIBLE);
-
- // Show the file name linear layout if either import or export is checked.
- if (importRadioButton.isChecked() || exportRadioButton.isChecked()) {
- fileNameLinearLayout.setVisibility(View.VISIBLE);
- }
-
- // Reset the text of the import button, which may have been changed to `Decrypt`.
- if (importRadioButton.isChecked()) {
- importExportButton.setText(R.string.import_button);
- }
-
- // Reset the default file path.
- fileNameEditText.setText(defaultFilePath);
-
- // Enable the import/export button if a file name exists.
- importExportButton.setEnabled(!fileNameEditText.getText().toString().isEmpty());
- break;
-
- case PASSWORD_ENCRYPTION:
- if (runningKitKat) {
- // Show the KitKat password encryption message.
- kitKatPasswordEncryptionTextView.setVisibility(View.VISIBLE);
-
- // Hide the OpenPGP required text view and the file location card.
- openKeychainRequiredTextView.setVisibility(View.GONE);
- fileLocationCardView.setVisibility(View.GONE);
- } else {
- // Hide the OpenPGP layout items.
- openKeychainRequiredTextView.setVisibility(View.GONE);
- openKeychainImportInstructionsTextView.setVisibility(View.GONE);
-
- // Show the password encryption layout items.
- passwordEncryptionTextInputLayout.setVisibility(View.VISIBLE);
-
- // Show the file location card.
- fileLocationCardView.setVisibility(View.VISIBLE);
-
- // Show the file name linear layout if either import or export is checked.
- if (importRadioButton.isChecked() || exportRadioButton.isChecked()) {
- fileNameLinearLayout.setVisibility(View.VISIBLE);
- }
-
- // Reset the text of the import button, which may have been changed to `Decrypt`.
- if (importRadioButton.isChecked()) {
- importExportButton.setText(R.string.import_button);
- }
-
- // Update the default file path.
- fileNameEditText.setText(defaultPasswordEncryptionFilePath);
-
- // Enable the import/export button if a password exists.
- importExportButton.setEnabled(!encryptionPasswordEditText.getText().toString().isEmpty());
- }
- break;
-
- case OPENPGP_ENCRYPTION:
- // Hide the password encryption layout items.
- passwordEncryptionTextInputLayout.setVisibility(View.GONE);
- kitKatPasswordEncryptionTextView.setVisibility(View.GONE);
-
- // Updated items based on the installation status of OpenKeychain.
- if (openKeychainInstalled) { // OpenKeychain is installed.
- // Remove the default file path.
- fileNameEditText.setText("");
-
- // Show the file location card.
- fileLocationCardView.setVisibility(View.VISIBLE);
-
- if (importRadioButton.isChecked()) {
- // Show the file name linear layout and the OpenKeychain import instructions.
- fileNameLinearLayout.setVisibility(View.VISIBLE);
- openKeychainImportInstructionsTextView.setVisibility(View.VISIBLE);
-
- // Set the text of the import button to be `Decrypt`.
- importExportButton.setText(R.string.decrypt);
-
- // Disable the import/export button. The user needs to select a file to import first.
- importExportButton.setEnabled(false);
- } else if (exportRadioButton.isChecked()) {
- // Hide the file name linear layout and the OpenKeychain import instructions.
- fileNameLinearLayout.setVisibility(View.GONE);
- openKeychainImportInstructionsTextView.setVisibility(View.GONE);
-
- // Enable the import/export button.
- importExportButton.setEnabled(true);
- }
- } else { // OpenKeychain is not installed.
- // Show the OpenPGP required layout item.
- openKeychainRequiredTextView.setVisibility(View.VISIBLE);
-
- // Hide the file location card.
- fileLocationCardView.setVisibility(View.GONE);
- }
- break;
- }
- }
-
- @Override
- public void onNothingSelected(AdapterView<?> parent) {
-
- }
- });
-
- // Update the status of the import/export button when the password changes.
- encryptionPasswordEditText.addTextChangedListener(new TextWatcher() {
- @Override
- public void beforeTextChanged(CharSequence s, int start, int count, int after) {
- // Do nothing.
- }
-
- @Override
- public void onTextChanged(CharSequence s, int start, int before, int count) {
- // Do nothing.
- }
-
- @Override
- public void afterTextChanged(Editable s) {
- // Enable the import/export button if a file name and password exists.
- importExportButton.setEnabled(!fileNameEditText.getText().toString().isEmpty() && !encryptionPasswordEditText.getText().toString().isEmpty());
- }
- });
-
- // Update the status of the import/export button when the file name EditText changes.
- fileNameEditText.addTextChangedListener(new TextWatcher() {
- @Override
- public void beforeTextChanged(CharSequence s, int start, int count, int after) {
- // Do nothing.
- }
-
- @Override
- public void onTextChanged(CharSequence s, int start, int before, int count) {
- // Do nothing.
- }
-
- @Override
- public void afterTextChanged(Editable s) {
- // Adjust the export button according to the encryption spinner position.
- switch (encryptionSpinner.getSelectedItemPosition()) {
- case NO_ENCRYPTION:
- // Enable the import/export button if a file name exists.
- importExportButton.setEnabled(!fileNameEditText.getText().toString().isEmpty());
- break;
-
- case PASSWORD_ENCRYPTION:
- // Enable the import/export button if a file name and password exists.
- importExportButton.setEnabled(!fileNameEditText.getText().toString().isEmpty() && !encryptionPasswordEditText.getText().toString().isEmpty());
- break;
-
- case OPENPGP_ENCRYPTION:
- // Enable the import/export button if OpenKeychain is installed and a file name exists.
- importExportButton.setEnabled(openKeychainInstalled && !fileNameEditText.getText().toString().isEmpty());
- break;
- }
- }
- });
-
- // Hide the storage permissions text view on API < 23 as permissions on older devices are automatically granted.
- if (Build.VERSION.SDK_INT < 23) {
- storagePermissionTextView.setVisibility(View.GONE);
- }
- }
-
- public void onClickRadioButton(View view) {
- // Get handles for the views.
- Spinner encryptionSpinner = findViewById(R.id.encryption_spinner);
- LinearLayout fileNameLinearLayout = findViewById(R.id.file_name_linearlayout);
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
- TextView openKeychainImportInstructionTextView = findViewById(R.id.openkeychain_import_instructions_textview);
- Button importExportButton = findViewById(R.id.import_export_button);
-
- // Check to see if import or export was selected.
- switch (view.getId()) {
- case R.id.import_radiobutton:
- // Check to see if OpenPGP encryption is selected.
- if (encryptionSpinner.getSelectedItemPosition() == OPENPGP_ENCRYPTION) { // OpenPGP encryption selected.
- // Show the OpenKeychain import instructions.
- openKeychainImportInstructionTextView.setVisibility(View.VISIBLE);
-
- // Set the text on the import/export button to be `Decrypt`.
- importExportButton.setText(R.string.decrypt);
-
- // Enable the decrypt button if there is a file name.
- importExportButton.setEnabled(!fileNameEditText.getText().toString().isEmpty());
- } else { // OpenPGP encryption not selected.
- // Hide the OpenKeychain import instructions.
- openKeychainImportInstructionTextView.setVisibility(View.GONE);
-
- // Set the text on the import/export button to be `Import`.
- importExportButton.setText(R.string.import_button);
- }
-
- // Display the file name views.
- fileNameLinearLayout.setVisibility(View.VISIBLE);
- importExportButton.setVisibility(View.VISIBLE);
- break;
-
- case R.id.export_radiobutton:
- // Hide the OpenKeychain import instructions.
- openKeychainImportInstructionTextView.setVisibility(View.GONE);
-
- // Set the text on the import/export button to be `Export`.
- importExportButton.setText(R.string.export);
-
- // Show the import/export button.
- importExportButton.setVisibility(View.VISIBLE);
-
- // Check to see if OpenPGP encryption is selected.
- if (encryptionSpinner.getSelectedItemPosition() == OPENPGP_ENCRYPTION) { // OpenPGP encryption is selected.
- // Hide the file name views.
- fileNameLinearLayout.setVisibility(View.GONE);
-
- // Enable the export button.
- importExportButton.setEnabled(true);
- } else { // OpenPGP encryption is not selected.
- // Show the file name views.
- fileNameLinearLayout.setVisibility(View.VISIBLE);
- }
- break;
- }
- }
-
- public void browse(View view) {
- // Get a handle for the import radiobutton.
- RadioButton importRadioButton = findViewById(R.id.import_radiobutton);
-
- // Check to see if import or export is selected.
- if (importRadioButton.isChecked()) { // Import is selected.
- // Create the file picker intent.
- Intent importBrowseIntent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
-
- // Set the intent MIME type to include all files so that everything is visible.
- importBrowseIntent.setType("*/*");
-
- // Set the initial directory if the minimum API >= 26.
- if (Build.VERSION.SDK_INT >= 26) {
- importBrowseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
- }
-
- // Request a file that can be opened.
- importBrowseIntent.addCategory(Intent.CATEGORY_OPENABLE);
-
- // Launch the file picker.
- startActivityForResult(importBrowseIntent, BROWSE_RESULT_CODE);
- } else { // Export is selected
- // Create the file picker intent.
- Intent exportBrowseIntent = new Intent(Intent.ACTION_CREATE_DOCUMENT);
-
- // Set the intent MIME type to include all files so that everything is visible.
- exportBrowseIntent.setType("*/*");
-
- // Set the initial export file name.
- exportBrowseIntent.putExtra(Intent.EXTRA_TITLE, getString(R.string.settings_pbs));
-
- // Set the initial directory if the minimum API >= 26.
- if (Build.VERSION.SDK_INT >= 26) {
- exportBrowseIntent.putExtra(DocumentsContract.EXTRA_INITIAL_URI, Environment.getExternalStorageDirectory());
- }
-
- // Request a file that can be opened.
- exportBrowseIntent.addCategory(Intent.CATEGORY_OPENABLE);
-
- // Launch the file picker.
- startActivityForResult(exportBrowseIntent, BROWSE_RESULT_CODE);
- }
- }
-
- public void importExport(View view) {
- // Get a handle for the views.
- Spinner encryptionSpinner = findViewById(R.id.encryption_spinner);
- RadioButton importRadioButton = findViewById(R.id.import_radiobutton);
- RadioButton exportRadioButton = findViewById(R.id.export_radiobutton);
-
- // Check to see if the storage permission is needed.
- if ((encryptionSpinner.getSelectedItemPosition() == OPENPGP_ENCRYPTION) && exportRadioButton.isChecked()) { // Permission not needed to export via OpenKeychain.
- // Export the settings.
- exportSettings();
- } else if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) { // The storage permission has been granted.
- // Check to see if import or export is selected.
- if (importRadioButton.isChecked()) { // Import is selected.
- // Import the settings.
- importSettings();
- } else { // Export is selected.
- // Export the settings.
- exportSettings();
- }
- } else { // The storage permission has not been granted.
- // Get a handle for the file name EditText.
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
-
- // Get the file name string.
- String fileNameString = fileNameEditText.getText().toString();
-
- // Get the external private directory `File`.
- File externalPrivateDirectoryFile = getExternalFilesDir(null);
-
- // Remove the incorrect lint error below that the file might be null.
- assert externalPrivateDirectoryFile != null;
-
- // Get the external private directory string.
- String externalPrivateDirectory = externalPrivateDirectoryFile.toString();
-
- // Check to see if the file path is in the external private directory.
- if (fileNameString.startsWith(externalPrivateDirectory)) { // The file path is in the external private directory.
- // Check to see if import or export is selected.
- if (importRadioButton.isChecked()) { // Import is selected.
- // Import the settings.
- importSettings();
- } else { // Export is selected.
- // Export the settings.
- exportSettings();
- }
- } else { // The file path is in a public directory.
- // Check if the user has previously denied the storage permission.
- if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) { // Show a dialog explaining the request first.
- // Instantiate the storage permission alert dialog.
- DialogFragment storagePermissionDialogFragment = new StoragePermissionDialog();
-
- // Show the storage permission alert dialog. The permission will be requested when the dialog is closed.
- storagePermissionDialogFragment.show(getSupportFragmentManager(), getString(R.string.storage_permission));
- } else { // Show the permission request directly.
- // Request the storage permission. The export will be run when it finishes.
- ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);
- }
- }
- }
- }
-
- @Override
- public void onCloseStoragePermissionDialog() {
- // Request the write external storage permission. The import/export will be run when it finishes.
- ActivityCompat.requestPermissions(this, new String[] {Manifest.permission.WRITE_EXTERNAL_STORAGE}, 0);
- }
-
- @Override
- public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
- // Get a handle for the import radiobutton.
- RadioButton importRadioButton = findViewById(R.id.import_radiobutton);
-
- // Check to see if the storage permission was granted. If the dialog was canceled the grant results will be empty.
- if ((grantResults.length > 0) && (grantResults[0] == PackageManager.PERMISSION_GRANTED)) { // The storage permission was granted.
- // Run the import or export methods according to which radio button is selected.
- if (importRadioButton.isChecked()) { // Import is selected.
- // Import the settings.
- importSettings();
- } else { // Export is selected.
- // Export the settings.
- exportSettings();
- }
- } else { // The storage permission was not granted.
- // Display an error snackbar.
- Snackbar.make(importRadioButton, getString(R.string.cannot_use_location), Snackbar.LENGTH_LONG).show();
- }
- }
-
- @Override
- public void onActivityResult(int requestCode, int resultCode, Intent data) {
- switch (requestCode) {
- case (BROWSE_RESULT_CODE):
- // Don't do anything if the user pressed back from the file picker.
- if (resultCode == Activity.RESULT_OK) {
- // Get a handle for the file name edit text.
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
-
- // Get the file name URI.
- Uri fileNameUri = data.getData();
-
- // Remove the lint warning that the file name URI might be null.
- assert fileNameUri != null;
-
- // Get the raw file name path.
- String rawFileNamePath = fileNameUri.getPath();
-
- // Remove the incorrect lint warning that the file name path might be null.
- assert rawFileNamePath != null;
-
- // Check to see if the file name Path includes a valid storage location.
- if (rawFileNamePath.contains(":")) { // The path is valid.
- // Split the path into the initial content uri and the final path information.
- String fileNameContentPath = rawFileNamePath.substring(0, rawFileNamePath.indexOf(":"));
- String fileNameFinalPath = rawFileNamePath.substring(rawFileNamePath.indexOf(":") + 1);
-
- // Create the file name path string.
- String fileNamePath;
-
- // Construct the file name path.
- switch (fileNameContentPath) {
- // The documents home has a special content path.
- case "/document/home":
- fileNamePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/" + fileNameFinalPath;
- break;
-
- // Everything else for the primary user should be in `/document/primary`.
- case "/document/primary":
- fileNamePath = Environment.getExternalStorageDirectory() + "/" + fileNameFinalPath;
- break;
-
- // Just in case, catch everything else and place it in the external storage directory.
- default:
- fileNamePath = Environment.getExternalStorageDirectory() + "/" + fileNameFinalPath;
- break;
- }
-
- // Set the file name path as the text of the file name EditText.
- fileNameEditText.setText(fileNamePath);
- } else { // The path is invalid.
- Snackbar.make(fileNameEditText, rawFileNamePath + " " + getString(R.string.invalid_location), Snackbar.LENGTH_INDEFINITE).show();
- }
- }
- break;
-
- case OPENPGP_EXPORT_RESULT_CODE:
- // Get the temporary unencrypted export file.
- File temporaryUnencryptedExportFile = new File(getApplicationContext().getCacheDir() + "/" + getString(R.string.settings_pbs));
-
- // Delete the temporary unencrypted export file if it exists.
- if (temporaryUnencryptedExportFile.exists()) {
- //noinspection ResultOfMethodCallIgnored
- temporaryUnencryptedExportFile.delete();
- }
- break;
- }
- }
-
- private void exportSettings() {
- // Get a handle for the views.
- Spinner encryptionSpinner = findViewById(R.id.encryption_spinner);
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
-
- // Instantiate the import export database helper.
- ImportExportDatabaseHelper importExportDatabaseHelper = new ImportExportDatabaseHelper();
-
- // Get the export file string.
- String exportFileString = fileNameEditText.getText().toString();
-
- // Get the export and temporary unencrypted export files.
- File exportFile = new File(exportFileString);
- File temporaryUnencryptedExportFile = new File(getApplicationContext().getCacheDir() + "/" + getString(R.string.settings_pbs));
-
- // Create an export status string.
- String exportStatus;
-
- // Export according to the encryption type.
- switch (encryptionSpinner.getSelectedItemPosition()) {
- case NO_ENCRYPTION:
- // Export the unencrypted file.
- exportStatus = importExportDatabaseHelper.exportUnencrypted(exportFile, this);
-
- // Show a disposition snackbar.
- if (exportStatus.equals(ImportExportDatabaseHelper.EXPORT_SUCCESSFUL)) {
- Snackbar.make(fileNameEditText, getString(R.string.export_successful), Snackbar.LENGTH_SHORT).show();
- } else {
- Snackbar.make(fileNameEditText, getString(R.string.export_failed) + " " + exportStatus, Snackbar.LENGTH_INDEFINITE).show();
- }
- break;
-
- case PASSWORD_ENCRYPTION:
- // Create an unencrypted export in a private directory.
- exportStatus = importExportDatabaseHelper.exportUnencrypted(temporaryUnencryptedExportFile, this);
-
- try {
- // Create an unencrypted export file input stream.
- FileInputStream unencryptedExportFileInputStream = new FileInputStream(temporaryUnencryptedExportFile);
-
- // Delete the encrypted export file if it exists.
- if (exportFile.exists()) {
- //noinspection ResultOfMethodCallIgnored
- exportFile.delete();
- }
-
- // Create an encrypted export file output stream.
- FileOutputStream encryptedExportFileOutputStream = new FileOutputStream(exportFile);
-
- // Get a handle for the encryption password EditText.
- EditText encryptionPasswordEditText = findViewById(R.id.password_encryption_edittext);
-
- // Get the encryption password.
- String encryptionPasswordString = encryptionPasswordEditText.getText().toString();
-
- // Initialize a secure random number generator.
- SecureRandom secureRandom = new SecureRandom();
-
- // Get a 256 bit (32 byte) random salt.
- byte[] saltByteArray = new byte[32];
- secureRandom.nextBytes(saltByteArray);
-
- // Convert the encryption password to a byte array.
- byte[] encryptionPasswordByteArray = encryptionPasswordString.getBytes(StandardCharsets.UTF_8);
-
- // Append the salt to the encryption password byte array. This protects against rainbow table attacks.
- byte[] encryptionPasswordWithSaltByteArray = new byte[encryptionPasswordByteArray.length + saltByteArray.length];
- System.arraycopy(encryptionPasswordByteArray, 0, encryptionPasswordWithSaltByteArray, 0, encryptionPasswordByteArray.length);
- System.arraycopy(saltByteArray, 0, encryptionPasswordWithSaltByteArray, encryptionPasswordByteArray.length, saltByteArray.length);
-
- // Get a SHA-512 message digest.
- MessageDigest messageDigest = MessageDigest.getInstance("SHA-512");
-
- // Hash the salted encryption password. Otherwise, any characters after the 32nd character in the password are ignored.
- byte[] hashedEncryptionPasswordWithSaltByteArray = messageDigest.digest(encryptionPasswordWithSaltByteArray);
-
- // Truncate the encryption password byte array to 256 bits (32 bytes).
- byte[] truncatedHashedEncryptionPasswordWithSaltByteArray = Arrays.copyOf(hashedEncryptionPasswordWithSaltByteArray, 32);
-
- // Create an AES secret key from the encryption password byte array.
- SecretKeySpec secretKey = new SecretKeySpec(truncatedHashedEncryptionPasswordWithSaltByteArray, "AES");
-
- // Generate a random 12 byte initialization vector. According to NIST, a 12 byte initialization vector is more secure than a 16 byte one.
- byte[] initializationVector = new byte[12];
- secureRandom.nextBytes(initializationVector);
-
- // Get a Advanced Encryption Standard, Galois/Counter Mode, No Padding cipher instance. Galois/Counter mode protects against modification of the ciphertext. It doesn't use padding.
- Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
-
- // Set the GCM tag length to be 128 bits (the maximum) and apply the initialization vector.
- GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(128, initializationVector);
-
- // Initialize the cipher.
- cipher.init(Cipher.ENCRYPT_MODE, secretKey, gcmParameterSpec);
-
- // Add the salt and the initialization vector to the export file.
- encryptedExportFileOutputStream.write(saltByteArray);
- encryptedExportFileOutputStream.write(initializationVector);
-
- // Create a cipher output stream.
- CipherOutputStream cipherOutputStream = new CipherOutputStream(encryptedExportFileOutputStream, cipher);
-
- // Initialize variables to store data as it is moved from the unencrypted export file input stream to the cipher output stream. Move 128 bits (16 bytes) at a time.
- int numberOfBytesRead;
- byte[] encryptedBytes = new byte[16];
-
- // Read up to 128 bits (16 bytes) of data from the unencrypted export file stream. `-1` will be returned when the end of the file is reached.
- while ((numberOfBytesRead = unencryptedExportFileInputStream.read(encryptedBytes)) != -1) {
- // Write the data to the cipher output stream.
- cipherOutputStream.write(encryptedBytes, 0, numberOfBytesRead);
- }
-
- // Close the streams.
- cipherOutputStream.flush();
- cipherOutputStream.close();
- encryptedExportFileOutputStream.close();
- unencryptedExportFileInputStream.close();
-
- // Wipe the encryption data from memory.
- //noinspection UnusedAssignment
- encryptionPasswordString = "";
- Arrays.fill(saltByteArray, (byte) 0);
- Arrays.fill(encryptionPasswordByteArray, (byte) 0);
- Arrays.fill(encryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(hashedEncryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(truncatedHashedEncryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(initializationVector, (byte) 0);
- Arrays.fill(encryptedBytes, (byte) 0);
-
- // Delete the temporary unencrypted export file.
- //noinspection ResultOfMethodCallIgnored
- temporaryUnencryptedExportFile.delete();
- } catch (Exception exception) {
- exportStatus = exception.toString();
- }
-
- // Show a disposition snackbar.
- if (exportStatus.equals(ImportExportDatabaseHelper.EXPORT_SUCCESSFUL)) {
- Snackbar.make(fileNameEditText, getString(R.string.export_successful), Snackbar.LENGTH_SHORT).show();
- } else {
- Snackbar.make(fileNameEditText, getString(R.string.export_failed) + " " + exportStatus, Snackbar.LENGTH_INDEFINITE).show();
- }
- break;
-
- case OPENPGP_ENCRYPTION:
- // Create an unencrypted export in the private location.
- importExportDatabaseHelper.exportUnencrypted(temporaryUnencryptedExportFile, this);
-
- // Create an encryption intent for OpenKeychain.
- Intent openKeychainEncryptIntent = new Intent("org.sufficientlysecure.keychain.action.ENCRYPT_DATA");
-
- // Include the temporary unencrypted export file URI.
- openKeychainEncryptIntent.setData(FileProvider.getUriForFile(this, getString(R.string.file_provider), temporaryUnencryptedExportFile));
-
- // Allow OpenKeychain to read the file URI.
- openKeychainEncryptIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-
- // Send the intent to the OpenKeychain package.
- openKeychainEncryptIntent.setPackage("org.sufficientlysecure.keychain");
-
- // Make it so.
- startActivityForResult(openKeychainEncryptIntent, OPENPGP_EXPORT_RESULT_CODE);
- break;
- }
-
- // Add the file to the list of recent files. This doesn't currently work, but maybe it will someday.
- MediaScannerConnection.scanFile(this, new String[] {exportFileString}, new String[] {"application/x-sqlite3"}, null);
- }
-
- private void importSettings() {
- // Get a handle for the views.
- Spinner encryptionSpinner = findViewById(R.id.encryption_spinner);
- EditText fileNameEditText = findViewById(R.id.file_name_edittext);
-
- // Instantiate the import export database helper.
- ImportExportDatabaseHelper importExportDatabaseHelper = new ImportExportDatabaseHelper();
-
- // Get the import file.
- File importFile = new File(fileNameEditText.getText().toString());
-
- // Initialize the import status string
- String importStatus = "";
-
- // Import according to the encryption type.
- switch (encryptionSpinner.getSelectedItemPosition()) {
- case NO_ENCRYPTION:
- // Import the unencrypted file.
- importStatus = importExportDatabaseHelper.importUnencrypted(importFile, this);
- break;
-
- case PASSWORD_ENCRYPTION:
- // Use a private temporary import location.
- File temporaryUnencryptedImportFile = new File(getApplicationContext().getCacheDir() + "/" + getString(R.string.settings_pbs));
-
- try {
- // Create an encrypted import file input stream.
- FileInputStream encryptedImportFileInputStream = new FileInputStream(importFile);
-
- // Delete the temporary import file if it exists.
- if (temporaryUnencryptedImportFile.exists()) {
- //noinspection ResultOfMethodCallIgnored
- temporaryUnencryptedImportFile.delete();
- }
-
- // Create an unencrypted import file output stream.
- FileOutputStream unencryptedImportFileOutputStream = new FileOutputStream(temporaryUnencryptedImportFile);
-
- // Get a handle for the encryption password EditText.
- EditText encryptionPasswordEditText = findViewById(R.id.password_encryption_edittext);
-
- // Get the encryption password.
- String encryptionPasswordString = encryptionPasswordEditText.getText().toString();
-
- // Get the salt from the beginning of the import file.
- byte[] saltByteArray = new byte[32];
- //noinspection ResultOfMethodCallIgnored
- encryptedImportFileInputStream.read(saltByteArray);
-
- // Get the initialization vector from the import file.
- byte[] initializationVector = new byte[12];
- //noinspection ResultOfMethodCallIgnored
- encryptedImportFileInputStream.read(initializationVector);
-
- // Convert the encryption password to a byte array.
- byte[] encryptionPasswordByteArray = encryptionPasswordString.getBytes(StandardCharsets.UTF_8);
-
- // Append the salt to the encryption password byte array. This protects against rainbow table attacks.
- byte[] encryptionPasswordWithSaltByteArray = new byte[encryptionPasswordByteArray.length + saltByteArray.length];
- System.arraycopy(encryptionPasswordByteArray, 0, encryptionPasswordWithSaltByteArray, 0, encryptionPasswordByteArray.length);
- System.arraycopy(saltByteArray, 0, encryptionPasswordWithSaltByteArray, encryptionPasswordByteArray.length, saltByteArray.length);
-
- // Get a SHA-512 message digest.
- MessageDigest messageDigest = MessageDigest.getInstance("SHA-512");
-
- // Hash the salted encryption password. Otherwise, any characters after the 32nd character in the password are ignored.
- byte[] hashedEncryptionPasswordWithSaltByteArray = messageDigest.digest(encryptionPasswordWithSaltByteArray);
-
- // Truncate the encryption password byte array to 256 bits (32 bytes).
- byte[] truncatedHashedEncryptionPasswordWithSaltByteArray = Arrays.copyOf(hashedEncryptionPasswordWithSaltByteArray, 32);
-
- // Create an AES secret key from the encryption password byte array.
- SecretKeySpec secretKey = new SecretKeySpec(truncatedHashedEncryptionPasswordWithSaltByteArray, "AES");
-
- // Get a Advanced Encryption Standard, Galois/Counter Mode, No Padding cipher instance. Galois/Counter mode protects against modification of the ciphertext. It doesn't use padding.
- Cipher cipher = Cipher.getInstance("AES/GCM/NoPadding");
-
- // Set the GCM tag length to be 128 bits (the maximum) and apply the initialization vector.
- GCMParameterSpec gcmParameterSpec = new GCMParameterSpec(128, initializationVector);
-
- // Initialize the cipher.
- cipher.init(Cipher.DECRYPT_MODE, secretKey, gcmParameterSpec);
-
- // Create a cipher input stream.
- CipherInputStream cipherInputStream = new CipherInputStream(encryptedImportFileInputStream, cipher);
-
- // Initialize variables to store data as it is moved from the cipher input stream to the unencrypted import file output stream. Move 128 bits (16 bytes) at a time.
- int numberOfBytesRead;
- byte[] decryptedBytes = new byte[16];
-
- // Read up to 128 bits (16 bytes) of data from the cipher input stream. `-1` will be returned when the end fo the file is reached.
- while ((numberOfBytesRead = cipherInputStream.read(decryptedBytes)) != -1) {
- // Write the data to the unencrypted import file output stream.
- unencryptedImportFileOutputStream.write(decryptedBytes, 0, numberOfBytesRead);
- }
-
- // Close the streams.
- unencryptedImportFileOutputStream.flush();
- unencryptedImportFileOutputStream.close();
- cipherInputStream.close();
- encryptedImportFileInputStream.close();
-
- // Wipe the encryption data from memory.
- //noinspection UnusedAssignment
- encryptionPasswordString = "";
- Arrays.fill(saltByteArray, (byte) 0);
- Arrays.fill(initializationVector, (byte) 0);
- Arrays.fill(encryptionPasswordByteArray, (byte) 0);
- Arrays.fill(encryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(hashedEncryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(truncatedHashedEncryptionPasswordWithSaltByteArray, (byte) 0);
- Arrays.fill(decryptedBytes, (byte) 0);
-
- // Import the unencrypted database from the private location.
- importStatus = importExportDatabaseHelper.importUnencrypted(temporaryUnencryptedImportFile, this);
-
- // Delete the temporary unencrypted import file.
- //noinspection ResultOfMethodCallIgnored
- temporaryUnencryptedImportFile.delete();
- } catch (Exception exception) {
- importStatus = exception.toString();
- }
- break;
-
- case OPENPGP_ENCRYPTION:
- try {
- // Create an decryption intent for OpenKeychain.
- Intent openKeychainDecryptIntent = new Intent("org.sufficientlysecure.keychain.action.DECRYPT_DATA");
-
- // Include the URI to be decrypted.
- openKeychainDecryptIntent.setData(FileProvider.getUriForFile(this, getString(R.string.file_provider), importFile));
-
- // Allow OpenKeychain to read the file URI.
- openKeychainDecryptIntent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-
- // Send the intent to the OpenKeychain package.
- openKeychainDecryptIntent.setPackage("org.sufficientlysecure.keychain");
-
- // Make it so.
- startActivity(openKeychainDecryptIntent);
- } catch (IllegalArgumentException exception) { // The file import location is not valid.
- // Display a snack bar with the import error.
- Snackbar.make(fileNameEditText, getString(R.string.import_failed) + " " + exception.toString(), Snackbar.LENGTH_INDEFINITE).show();
- }
- break;
- }
-
- // Respond to the import disposition.
- if (importStatus.equals(ImportExportDatabaseHelper.IMPORT_SUCCESSFUL)) { // The import was successful.
- // Create an intent to restart Privacy Browser.
- Intent restartIntent = getParentActivityIntent();
-
- // Assert that the intent is not null to remove the lint error below.
- assert restartIntent != null;
-
- // `Intent.FLAG_ACTIVITY_CLEAR_TASK` removes all activities from the stack. It requires `Intent.FLAG_ACTIVITY_NEW_TASK`.
- restartIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
-
- // Make it so.
- startActivity(restartIntent);
- } else if (!(encryptionSpinner.getSelectedItemPosition() == OPENPGP_ENCRYPTION)){ // The import was not successful.
- // Display a snack bar with the import error.
- Snackbar.make(fileNameEditText, getString(R.string.import_failed) + " " + importStatus, Snackbar.LENGTH_INDEFINITE).show();
- }
- }
-}
\ No newline at end of file
projects / PrivacyBrowserAndroid.git / blobdiff