intent api: restore key

app/src/main/java/org/torproject/android/OrbotMainActivity.java

@@ -70,6 +70,7 @@ import org.torproject.android.ui.ImageProgressView;
 import org.torproject.android.ui.PromoAppsActivity;
 import org.torproject.android.ui.Rotate3dAnimation;
 import org.torproject.android.ui.hiddenservices.HiddenServicesActivity;
+import org.torproject.android.ui.hiddenservices.backup.BackupUtils;
 import org.torproject.android.ui.hiddenservices.providers.HSContentProvider;
 import org.torproject.android.vpn.VPNEnableActivity;
 
@@ -559,7 +560,11 @@ public class OrbotMainActivity extends AppCompatActivity
             stopVpnService();
     }
 
-    private void enableHiddenServicePort(String hsName, final int hsPort, int hsRemotePort, final String backupToPackage, final String keyZipPath) throws RemoteException, InterruptedException {
+    private void enableHiddenServicePort(
+            String hsName, final int hsPort, int hsRemotePort,
+            final String backupToPackage, final Uri hsKeyPath
+    ) throws RemoteException, InterruptedException {
+
         String onionHostname = null;
 
         if (hsName == null)
@@ -620,13 +625,12 @@ public class OrbotMainActivity extends AppCompatActivity
                         if (onion != null && onion.getCount() > 0) {
                             hostname = onion.getString(onion.getColumnIndex(HSContentProvider.HiddenService.NAME));
                             nResult.putExtra("hs_host", hostname);
-                            /* TODO
+
+                            if (hsKeyPath != null) {
                                 BackupUtils hsutils = new BackupUtils(getApplicationContext());
-                            if (keyZipPath != null && keyZipPath.length() > 0) {
+                                hsutils.restoreKeyBackup(hsPort, hsKeyPath);
-                                // hsutils.restoreZipBackup(hsPort, keyZipPath);
                                 requestTorRereadConfig();
                             }
-                            */
 
                             if (backupToPackage != null && backupToPackage.length() > 0) {
                                 String servicePath = getFilesDir() + "/" + TorServiceConstants.HIDDEN_SERVICES_DIR + "/hs" + hsPort;
@@ -682,7 +686,7 @@ public class OrbotMainActivity extends AppCompatActivity
                 final int hiddenServiceRemotePort = intent.getIntExtra("hs_onion_port", -1);
                 final String hiddenServiceName = intent.getStringExtra("hs_name");
                 final String backupToPackage = intent.getStringExtra("hs_backup_to_package");
-                final String keyZipPath = intent.getStringExtra("hs_key_path");
+                final Uri mKeyUri = intent.getData();
 
                 DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
 
@@ -692,7 +696,7 @@ public class OrbotMainActivity extends AppCompatActivity
                                 try {
                                     enableHiddenServicePort(
                                             hiddenServiceName, hiddenServicePort,
-                                            hiddenServiceRemotePort, backupToPackage, keyZipPath
+                                            hiddenServiceRemotePort, backupToPackage, mKeyUri
                                     );
                                 } catch (RemoteException e) {
                                     // TODO Auto-generated catch block

app/src/main/java/org/torproject/android/ui/hiddenservices/backup/BackupUtils.java

@@ -4,6 +4,8 @@ import android.content.ContentResolver;
 import android.content.ContentValues;
 import android.content.Context;
 import android.database.Cursor;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
 import android.widget.Toast;
 
 import org.json.JSONException;
@@ -15,8 +17,11 @@ import org.torproject.android.ui.hiddenservices.storage.ExternalStorage;
 
 import java.io.File;
 import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.FileWriter;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.nio.MappedByteBuffer;
 import java.nio.channels.FileChannel;
 import java.nio.charset.Charset;
@@ -204,4 +209,24 @@ public class BackupUtils {
 
         Toast.makeText(mContext, R.string.backup_restored, Toast.LENGTH_LONG).show();
     }
+
+    public void restoreKeyBackup(int hsPort, Uri hsKeyPath) {
+        String keyFilePath = mHSBasePath + "/hs" + hsPort + "/private_key";
+
+        try {
+            ParcelFileDescriptor mInputPFD = mContext.getContentResolver().openFileDescriptor(hsKeyPath, "r");
+            InputStream fileStream = new FileInputStream(mInputPFD.getFileDescriptor());
+            OutputStream file = new FileOutputStream(keyFilePath);
+
+            byte[] buffer = new byte[1024];
+            int length;
+            while ((length = fileStream.read(buffer)) > 0) {
+                file.write(buffer, 0, length);
+            }
+            file.close();
+
+        } catch (IOException | NullPointerException e) {
+            e.printStackTrace();
+        }
+    }
 }