Create app autofill service: a dialog pops up for all password fields & has a button to paste/set a password found in the store with name matching app's

6 files changed, 271 insertions, 0 deletions

diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 2849695f..d45583c9 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -4,6 +4,9 @@
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
     <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+	<uses-permission android:name="android.permission.BIND_ACCESSIBILITY_SERVICE" />
+	<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />
+
 	<application android:allowBackup="true" android:icon="@drawable/ic_launcher"
 		android:label="@string/app_name" android:theme="@style/AppTheme">
 		<activity android:name=".PasswordStore" android:label="@string/app_name"
@@ -42,6 +45,19 @@
 				android:value="com.zeapo.pwdstore.PasswordStore" />
 		</activity>
 
+		<service android:name=".AutofillService"
+				 android:permission="android.permission.BIND_ACCESSIBILITY_SERVICE">
+			<intent-filter>
+				<action android:name="android.accessibilityservice.AccessibilityService" />
+			</intent-filter>
+			<meta-data android:name="android.accessibilityservice"
+					   android:resource="@xml/autofill_config" />
+		</service>
+
+		<activity android:name=".AutofillActivity">
+
+		</activity>
+
         <activity android:name="net.rdrei.android.dirchooser.DirectoryChooserActivity" />
 	</application>
 
diff --git a/app/src/main/java/com/zeapo/pwdstore/AutofillActivity.java b/app/src/main/java/com/zeapo/pwdstore/AutofillActivity.java
new file mode 100644
index 00000000..d7561029
--- /dev/null
+++ b/app/src/main/java/com/zeapo/pwdstore/AutofillActivity.java
@@ -0,0 +1,33 @@
+package com.zeapo.pwdstore;
+
+import android.app.PendingIntent;
+import android.content.Intent;
+import android.content.IntentSender;
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+
+
+public class AutofillActivity extends AppCompatActivity {
+    public static final int REQUEST_CODE_DECRYPT_AND_VERIFY = 9913;
+    private boolean bound = false;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        Intent intent = getIntent();
+        PendingIntent pi = intent.getExtras().getParcelable("pending_intent");
+        try {
+            startIntentSenderForResult(pi.getIntentSender()
+                    , REQUEST_CODE_DECRYPT_AND_VERIFY, null, 0, 0, 0);
+        } catch (IntentSender.SendIntentException e) {
+            Log.e(AutofillService.Constants.TAG, "SendIntentException", e);
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        finish();
+        AutofillService.getService().decryptAndVerify();
+    }
+}
diff --git a/app/src/main/java/com/zeapo/pwdstore/AutofillService.java b/app/src/main/java/com/zeapo/pwdstore/AutofillService.java
new file mode 100644
index 00000000..ca738c67
--- /dev/null
+++ b/app/src/main/java/com/zeapo/pwdstore/AutofillService.java
@@ -0,0 +1,200 @@
+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.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.View;
+import android.view.WindowManager;
+import android.view.accessibility.AccessibilityEvent;
+import android.view.accessibility.AccessibilityNodeInfo;
+import android.widget.Button;
+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;
+    private static AutofillService service;
+
+    public final class Constants {
+        public static final String TAG = "Keychain";
+    }
+
+    @Override
+    protected void onServiceConnected() {
+        super.onServiceConnected();
+        serviceConnection = new OpenPgpServiceConnection(AutofillService.this, "org.sufficientlysecure.keychain");
+        serviceConnection.bindToService();
+        settings = PreferenceManager.getDefaultSharedPreferences(this);
+        service = this;
+    }
+
+    public static AutofillService getService() {
+        return service;
+    }
+
+    @Override
+    public void onAccessibilityEvent(AccessibilityEvent event) {
+        if (!event.isPassword() || Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR2) {
+            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();
+        if (appName.equals("OpenKeychain")) {
+            return;
+        }
+        items = recursiveFilter(appName, null);
+        if (items.isEmpty()) {
+            return;
+        }
+        ArrayList<CharSequence> itemNames = new ArrayList<>();
+        for (PasswordItem item : items) {
+            itemNames.add(item.toString());
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(this, R.style.Theme_AppCompat_Light_Dialog_Alert);
+        builder.setNegativeButton("Cancel", null);
+        builder.setView(R.layout.autofill_layout);
+        final AlertDialog dialog = builder.create();
+
+        dialog.setTitle("Fill with Password Store");
+        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.show();
+        ((Button) dialog.findViewById(R.id.button)).setText(itemNames.get(0).toString());
+        dialog.findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                decryptAndVerify();
+                dialog.dismiss();
+            }
+        });
+    }
+
+    private ArrayList<PasswordItem> recursiveFilter(String filter, File dir) {
+        ArrayList<PasswordItem> items = new ArrayList<>();
+        if (!PasswordRepository.isInitialized()) {
+            return items;
+        }
+        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;
+    }
+
+    @Override
+    public void onInterrupt() {
+
+    }
+
+    public void decryptAndVerify() {
+        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 (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                        // if the user focused on something else, take focus back
+                        // but this will open another dialog...
+                        info.performAction(AccessibilityNodeInfo.ACTION_FOCUS);
+                        Bundle args = new Bundle();
+                        args.putCharSequence(AccessibilityNodeInfo.ACTION_ARGUMENT_SET_TEXT_CHARSEQUENCE,
+                                passContent[0]);
+                        info.performAction(AccessibilityNodeInfo.ACTION_SET_TEXT, args);
+                    } else {
+                        info.performAction(AccessibilityNodeInfo.ACTION_FOCUS);
+                        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;
+            }
+        }
+    }
+}
diff --git a/app/src/main/res/layout/autofill_layout.xml b/app/src/main/res/layout/autofill_layout.xml
new file mode 100644
index 00000000..0108160d
--- /dev/null
+++ b/app/src/main/res/layout/autofill_layout.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <Button
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/button"
+        android:layout_gravity="center"/>
+</LinearLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 3a3d4061..825643bf 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -154,4 +154,6 @@
     <string name="pwd_generate_button">Generate</string>
     <string name="category_string">"Category: "</string>
 
+    <!-- Autofill -->
+    <string name="autofill_description">Auto-fills login fields.</string>
 </resources>
diff --git a/app/src/main/res/xml/autofill_config.xml b/app/src/main/res/xml/autofill_config.xml
new file mode 100644
index 00000000..618442ab
--- /dev/null
+++ b/app/src/main/res/xml/autofill_config.xml
@@ -0,0 +1,8 @@
+<accessibility-service xmlns:android="http://schemas.android.com/apk/res/android"
+                       android:description="@string/autofill_description"
+                       android:accessibilityEventTypes="typeViewFocused"
+                       android:accessibilityFlags="flagDefault"
+                       android:accessibilityFeedbackType="feedbackGeneric"
+                       android:notificationTimeout="100"
+                       android:canRetrieveWindowContent="true"
+    />
\ No newline at end of file