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package com.zeapo.pwdstore;
import android.accessibilityservice.AccessibilityService;
import android.app.PendingIntent;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v7.app.AlertDialog;
import android.util.Log;
import android.view.WindowManager;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
import android.widget.Toast;
import com.zeapo.pwdstore.utils.PasswordItem;
import com.zeapo.pwdstore.utils.PasswordRepository;
import org.apache.commons.io.FileUtils;
import org.openintents.openpgp.OpenPgpError;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpServiceConnection;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
public class AutofillService extends AccessibilityService {
private OpenPgpServiceConnection serviceConnection;
private SharedPreferences settings;
private AccessibilityNodeInfo info; // the original source of the event (the edittext field)
private ArrayList<PasswordItem> items; // password choices
private AlertDialog dialog;
private static boolean unlockOK = false; // if openkeychain user interaction was successful
private CharSequence packageName;
private boolean ignoreActionFocus = false;
public final class Constants {
public static final String TAG = "Keychain";
}
public static void setUnlockOK() { unlockOK = true; }
@Override
protected void onServiceConnected() {
super.onServiceConnected();
serviceConnection = new OpenPgpServiceConnection(AutofillService.this, "org.sufficientlysecure.keychain");
serviceConnection.bindToService();
settings = PreferenceManager.getDefaultSharedPreferences(this);
}
@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
// if returning to the source app from a successful AutofillActivity
if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
&& event.getPackageName().equals(packageName) && unlockOK) {
decryptAndVerify();
}
if (!event.isPassword()
|| Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2
|| event.getPackageName().equals("org.sufficientlysecure.keychain")) {
if (!(event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED
&& event.getPackageName().toString().contains("com.android.inputmethod"))
&& dialog != null && dialog.isShowing()) {
dialog.dismiss();
}
return;
}
if (dialog != null && dialog.isShowing()) {
dialog.dismiss();
}
// ignore the ACTION_FOCUS from decryptAndVerify
if (ignoreActionFocus) {
ignoreActionFocus = false;
return;
}
info = event.getSource();
PackageManager packageManager = getPackageManager();
ApplicationInfo applicationInfo;
try {
applicationInfo = packageManager.getApplicationInfo(event.getPackageName().toString(), 0);
} catch (PackageManager.NameNotFoundException e) {
applicationInfo = null;
}
String appName = (applicationInfo != null ? packageManager.getApplicationLabel(applicationInfo) : "").toString();
items = recursiveFilter(appName, null);
if (items.isEmpty()) {
return;
}
if (dialog == null) {
AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.Theme_AppCompat_Dialog);
builder.setNegativeButton("Cancel", null);
builder.setPositiveButton("Fill", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
decryptAndVerify();
}
});
dialog = builder.create();
dialog.setIcon(R.drawable.ic_launcher);
dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);
dialog.getWindow().addFlags(WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE);
dialog.getWindow().clearFlags(WindowManager.LayoutParams.FLAG_DIM_BEHIND);
}
dialog.setTitle(items.get(0).getName());
dialog.show();
dialog.getWindow().setLayout(WindowManager.LayoutParams.WRAP_CONTENT, WindowManager.LayoutParams.WRAP_CONTENT);
}
private ArrayList<PasswordItem> recursiveFilter(String filter, File dir) {
ArrayList<PasswordItem> items = new ArrayList<>();
if (!PasswordRepository.isInitialized()) {
initialize();
}
ArrayList<PasswordItem> passwordItems = dir == null ?
PasswordRepository.getPasswords() :
PasswordRepository.getPasswords(dir);
for (PasswordItem item : passwordItems) {
if (item.getType() == PasswordItem.TYPE_CATEGORY) {
recursiveFilter(filter, item.getFile());
}
if (item.toString().toLowerCase().contains(filter.toLowerCase())) {
items.add(item);
}
}
return items;
}
// just like PasswordRepository.initialize().
private void initialize() {
File dir = null;
SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
if (settings.getBoolean("git_external", false)) {
if (settings.getString("git_external_repo", null) != null) {
dir = new File(settings.getString("git_external_repo", null));
}
} else {
dir = new File(getFilesDir() + "/store");
}
// temp for debug
if (dir == null) {
Intent intent = new Intent(this, UserPreference.class);
intent.putExtra("operation", "git_external");
startActivity(intent);
return;
}
// uninitialize the repo if the dir does not exist or is absolutely empty
if (!dir.exists() || !dir.isDirectory() || FileUtils.listFiles(dir, null, false).isEmpty()) {
settings.edit().putBoolean("repository_initialized", false).apply();
}
if (!PasswordRepository.getPasswords(dir).isEmpty()) {
settings.edit().putBoolean("repository_initialized", true).apply();
}
// create the repository static variable in PasswordRepository
PasswordRepository.getRepository(new File(dir.getAbsolutePath() + "/.git"));
}
@Override
public void onInterrupt() {
}
public void decryptAndVerify() {
unlockOK = false;
packageName = info.getPackageName();
Intent data = new Intent();
data.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
InputStream is = null;
try {
is = FileUtils.openInputStream(items.get(0).getFile());
} catch (IOException e) {
e.printStackTrace();
}
ByteArrayOutputStream os = new ByteArrayOutputStream();
OpenPgpApi api = new OpenPgpApi(AutofillService.this, serviceConnection.getService());
Intent result = api.executeApi(data, is, os);
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, OpenPgpApi.RESULT_CODE_ERROR)) {
case OpenPgpApi.RESULT_CODE_SUCCESS: {
try {
String[] passContent = os.toString("UTF-8").split("\n");
// if the user focused on something else, take focus back
// but this will open another dialog...hack to ignore this
ignoreActionFocus = info.performAction(AccessibilityNodeInfo.ACTION_FOCUS);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
Bundle args = new Bundle();
args.putCharSequence(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE,
passContent[0]);
info.performAction(AccessibilityNodeInfo.ACTION_SET_TEXT, args);
} else {
ClipboardManager clipboard = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE);
ClipData clip = ClipData.newPlainText("autofill_pm", passContent[0]);
clipboard.setPrimaryClip(clip);
info.performAction(AccessibilityNodeInfo.ACTION_PASTE);
clip = ClipData.newPlainText("autofill_pm", "MyPasswordIsDaBest!");
clipboard.setPrimaryClip(clip);
if (settings.getBoolean("clear_clipboard_20x", false)) {
for (int i = 0; i < 19; i++) {
clip = ClipData.newPlainText(String.valueOf(i), String.valueOf(i));
clipboard.setPrimaryClip(clip);
}
}
}
} catch (UnsupportedEncodingException e) {
Log.e(Constants.TAG, "UnsupportedEncodingException", e);
}
break;
}
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED: {
Log.i("PgpHandler", "RESULT_CODE_USER_INTERACTION_REQUIRED");
PendingIntent pi = result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
// need to start a blank activity to call startIntentSenderForResult
Intent intent = new Intent(AutofillService.this, AutofillActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
intent.putExtra("pending_intent", pi);
startActivity(intent);
break;
}
case OpenPgpApi.RESULT_CODE_ERROR: {
OpenPgpError error = result.getParcelableExtra(OpenPgpApi.RESULT_ERROR);
Toast.makeText(AutofillService.this,
"Error from OpenKeyChain : " + error.getMessage(),
Toast.LENGTH_LONG).show();
Log.e(Constants.TAG, "onError getErrorId:" + error.getErrorId());
Log.e(Constants.TAG, "onError getMessage:" + error.getMessage());
break;
}
}
}
}
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