/*
* Copyright (C) 2012-2014 Dominik Schürmann <dominik@dominikschuermann.de>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sufficientlysecure.keychain.ui.dialog;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.support.annotation.NonNull;
import android.support.v4.app.DialogFragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.R;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.util.TlsHelper;
public class AddKeyserverDialogFragment extends DialogFragment implements OnEditorActionListener {
private static final String ARG_MESSENGER = "messenger";
public static final int MESSAGE_OKAY = 1;
public static final int MESSAGE_VERIFICATION_FAILED = 2;
public static final String MESSAGE_KEYSERVER = "new_keyserver";
public static final String MESSAGE_VERIFIED = "verified";
public static final String MESSAGE_FAILURE_REASON = "failure_reason";
private Messenger mMessenger;
private EditText mKeyserverEditText;
private CheckBox mVerifyKeyserverCheckBox;
public enum FailureReason {
INVALID_URL,
CONNECTION_FAILED
}
public static AddKeyserverDialogFragment newInstance(Messenger messenger) {
AddKeyserverDialogFragment frag = new AddKeyserverDialogFragment();
Bundle args = new Bundle();
args.putParcelable(ARG_MESSENGER, messenger);
frag.setArguments(args);
return frag;
}
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Activity activity = getActivity();
mMessenger = getArguments().getParcelable(ARG_MESSENGER);
CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity);
alert.setTitle(R.string.add_keyserver_dialog_title);
LayoutInflater inflater = activity.getLayoutInflater();
View view = inflater.inflate(R.layout.add_keyserver_dialog, null);
alert.setView(view);
mKeyserverEditText = (EditText) view.findViewById(R.id.keyserver_url_edit_text);
mVerifyKeyserverCheckBox = (CheckBox) view.findViewById(R.id.verify_keyserver_checkbox);
// we don't want dialog to be dismissed on click, thereby requiring the hack seen below
// and in onStart
alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
// we need to have an empty listener to prevent errors on some devices as mentioned
// at http://stackoverflow.com/q/13746412/3000919
// actual listener set in onStart
}
});
alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dismiss();
}
});
// Hack to open keyboard.
// This is the only method that I found to work across all Android versions
// http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/
// Notes: * onCreateView can't be used because we want to add buttons to the dialog
// * opening in onActivityCreated does not work on Android 4.4
mKeyserverEditText.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
mKeyserverEditText.post(new Runnable() {
@Override
public void run() {
InputMethodManager imm = (InputMethodManager) getActivity()
.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(mKeyserverEditText, InputMethodManager.SHOW_IMPLICIT);
}
});
}
});
mKeyserverEditText.requestFocus();
mKeyserverEditText.setImeActionLabel(getString(android.R.string.ok),
EditorInfo.IME_ACTION_DONE);
mKeyserverEditText.setOnEditorActionListener(this);
return alert.show();
}
@Override
public void onStart() {
super.onStart();
AlertDialog addKeyserverDialog = (AlertDialog) getDialog();
if (addKeyserverDialog != null) {
Button positiveButton = addKeyserverDialog.getButton(Dialog.BUTTON_POSITIVE);
positiveButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String keyserverUrl = mKeyserverEditText.getText().toString();
if (mVerifyKeyserverCheckBox.isChecked()) {
verifyConnection(keyserverUrl);
} else {
dismiss();
// return unverified keyserver back to activity
addKeyserver(keyserverUrl, false);
}
}
});
}
}
public void addKeyserver(String keyserver, boolean verified) {
dismiss();
Bundle data = new Bundle();
data.putString(MESSAGE_KEYSERVER, keyserver);
data.putBoolean(MESSAGE_VERIFIED, verified);
sendMessageToHandler(MESSAGE_OKAY, data);
}
public void verificationFailed(FailureReason reason) {
Bundle data = new Bundle();
data.putSerializable(MESSAGE_FAILURE_REASON, reason);
sendMessageToHandler(MESSAGE_VERIFICATION_FAILED, data);
}
public void verifyConnection(String keyserver) {
new AsyncTask<String, Void, FailureReason>() {
ProgressDialog mProgressDialog;
String mKeyserver;
@Override
protected void onPreExecute() {
mProgressDialog = new ProgressDialog(getActivity());
mProgressDialog.setMessage(getString(R.string.progress_verifying_keyserver_url));
mProgressDialog.setCancelable(false);
mProgressDialog.show();
}
@Override
protected FailureReason doInBackground(String... keyservers) {
mKeyserver = keyservers[0];
FailureReason reason = null;
try {
// replace hkps/hkp scheme and reconstruct Uri
Uri keyserverUri = Uri.parse(mKeyserver);
String scheme = keyserverUri.getScheme();
String schemeSpecificPart = keyserverUri.getSchemeSpecificPart();
String fragment = keyserverUri.getFragment();
if (scheme == null) {
throw new MalformedURLException();
}
if ("hkps".equalsIgnoreCase(scheme)) {
scheme = "https";
} else if ("hkp".equalsIgnoreCase(scheme)) {
scheme = "http";
}
URI newKeyserver = new URI(scheme, schemeSpecificPart, fragment);
Log.d(Constants.TAG, "Converted URL" + newKeyserver);
// just see if we can get a connection, then immediately close
TlsHelper.openConnection(newKeyserver.toURL()).getInputStream().close();
} catch (TlsHelper.TlsHelperException e) {
reason = FailureReason.CONNECTION_FAILED;
} catch (MalformedURLException | URISyntaxException e) {
Log.w(Constants.TAG, "Invalid keyserver URL entered by user.");
reason = FailureReason.INVALID_URL;
} catch (IOException e) {
Log.w(Constants.TAG, "Could not connect to entered keyserver url");
reason = FailureReason.CONNECTION_FAILED;
}
return reason;
}
@Override
protected void onPostExecute(FailureReason failureReason) {
mProgressDialog.dismiss();
if (failureReason == null) {
addKeyserver(mKeyserver, true);
} else {
verificationFailed(failureReason);
}
}
}.execute(keyserver);
}
@Override
public void onDismiss(DialogInterface dialog) {
super.onDismiss(dialog);
// hide keyboard on dismiss
hideKeyboard();
}
private void hideKeyboard() {
if (getActivity() == null) {
return;
}
InputMethodManager inputManager = (InputMethodManager) getActivity()
.getSystemService(Context.INPUT_METHOD_SERVICE);
//check if no view has focus:
View v = getActivity().getCurrentFocus();
if (v == null)
return;
inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
}
/**
* Associate the "done" button on the soft keyboard with the okay button in the view
*/
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (EditorInfo.IME_ACTION_DONE == actionId) {
AlertDialog dialog = ((AlertDialog) getDialog());
Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
bt.performClick();
return true;
}
return false;
}
/**
* Send message back to handler which is initialized in a activity
*
* @param what Message integer you want to send
*/
private void sendMessageToHandler(Integer what, Bundle data) {
Message msg = Message.obtain();
msg.what = what;
if (data != null) {
msg.setData(data);
}
try {
mMessenger.send(msg);
} catch (RemoteException e) {
Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
} catch (NullPointerException e) {
Log.w(Constants.TAG, "Messenger is null!", e);
}
}
}