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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.vpn2;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.Context;
import android.content.DialogInterface;
import android.content.res.Resources;
import android.net.ConnectivityManager;
import android.os.Bundle;
import android.security.Credentials;
import android.security.KeyStore;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import com.android.internal.net.VpnProfile;
import com.android.settings.R;
import com.google.android.collect.Lists;
import java.util.ArrayList;
import java.util.List;
/**
* Dialog to configure always-on VPN.
*/
public class LockdownConfigFragment extends DialogFragment {
private List<VpnProfile> mProfiles;
private List<CharSequence> mTitles;
private int mCurrentIndex;
private static final String TAG_LOCKDOWN = "lockdown";
private static class TitleAdapter extends ArrayAdapter<CharSequence> {
public TitleAdapter(Context context, List<CharSequence> objects) {
super(context, com.android.internal.R.layout.select_dialog_singlechoice_material,
android.R.id.text1, objects);
}
}
public static void show(VpnSettings parent) {
if (!parent.isAdded()) return;
final LockdownConfigFragment dialog = new LockdownConfigFragment();
dialog.show(parent.getFragmentManager(), TAG_LOCKDOWN);
}
private static String getStringOrNull(KeyStore keyStore, String key) {
if (!keyStore.isUnlocked()) {
return null;
}
final byte[] value = keyStore.get(key);
return value == null ? null : new String(value);
}
private void initProfiles(KeyStore keyStore, Resources res) {
final String lockdownKey = getStringOrNull(keyStore, Credentials.LOCKDOWN_VPN);
mProfiles = VpnSettings.loadVpnProfiles(keyStore, VpnProfile.TYPE_PPTP);
mTitles = new ArrayList<>(1 + mProfiles.size());
mTitles.add(res.getText(R.string.vpn_lockdown_none));
mCurrentIndex = 0;
for (VpnProfile profile : mProfiles) {
if (TextUtils.equals(profile.key, lockdownKey)) {
mCurrentIndex = mTitles.size();
}
mTitles.add(profile.name);
}
}
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Context context = getActivity();
final KeyStore keyStore = KeyStore.getInstance();
initProfiles(keyStore, context.getResources());
final AlertDialog.Builder builder = new AlertDialog.Builder(context);
final LayoutInflater dialogInflater = LayoutInflater.from(builder.getContext());
builder.setTitle(R.string.vpn_menu_lockdown);
final View view = dialogInflater.inflate(R.layout.vpn_lockdown_editor, null, false);
final ListView listView = (ListView) view.findViewById(android.R.id.list);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setAdapter(new TitleAdapter(context, mTitles));
listView.setItemChecked(mCurrentIndex, true);
builder.setView(view);
builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
final int newIndex = listView.getCheckedItemPosition();
if (mCurrentIndex == newIndex) return;
if (newIndex == 0) {
keyStore.delete(Credentials.LOCKDOWN_VPN);
} else {
final VpnProfile profile = mProfiles.get(newIndex - 1);
if (!profile.isValidLockdownProfile()) {
Toast.makeText(context, R.string.vpn_lockdown_config_error,
Toast.LENGTH_LONG).show();
return;
}
keyStore.put(Credentials.LOCKDOWN_VPN, profile.key.getBytes(),
KeyStore.UID_SELF, KeyStore.FLAG_ENCRYPTED);
}
// kick profiles since we changed them
ConnectivityManager.from(getActivity()).updateLockdownVpn();
}
});
return builder.create();
}
}
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