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/*
* Copyright (C) 2011 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;
import com.android.internal.widget.PasswordEntryKeyboardHelper;
import com.android.internal.widget.PasswordEntryKeyboardView;
import android.app.Activity;
import android.app.StatusBarManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.inputmethodservice.KeyboardView;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.os.storage.IMountService;
import android.text.TextUtils;
import android.text.format.DateFormat;
import android.util.Log;
import android.view.KeyEvent;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import java.util.Date;
public class CryptKeeper extends Activity implements TextView.OnEditorActionListener {
private static final String TAG = "CryptKeeper";
private static final String DECRYPT_STATE = "trigger_restart_framework";
private static final int UPDATE_PROGRESS = 1;
private static final int COOLDOWN = 2;
private static final int MAX_FAILED_ATTEMPTS = 30;
private static final int COOL_DOWN_ATTEMPTS = 10;
private static final int COOL_DOWN_INTERVAL = 30; // 30 seconds
private Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case UPDATE_PROGRESS:
String state = SystemProperties.get("vold.encrypt_progress");
ProgressBar progressBar = (ProgressBar) findViewById(R.id.progress_bar);
progressBar.setProgress(0);
try {
int progress = Integer.parseInt(state);
progressBar.setProgress(progress);
} catch (Exception e) {
Log.w(TAG, "Error parsing progress: " + e.toString());
}
// Check the status every 1 second
sendEmptyMessageDelayed(0, 1000);
break;
case COOLDOWN:
TextView tv = (TextView) findViewById(R.id.status);
if (mCooldown <= 0) {
// Re-enable the password entry
EditText passwordEntry = (EditText) findViewById(R.id.passwordEntry);
passwordEntry.setEnabled(true);
tv.setText(R.string.try_again);
} else {
CharSequence tempalte = getText(R.string.crypt_keeper_cooldown);
tv.setText(TextUtils.expandTemplate(tempalte, Integer.toString(mCooldown)));
mCooldown--;
mHandler.sendEmptyMessageDelayed(COOLDOWN, 1000); // Tick every second
}
break;
}
}
};
private int mFailedAttempts = 0;
private int mCooldown;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String state = SystemProperties.get("vold.decrypt");
if ("".equals(state) || DECRYPT_STATE.equals(state)) {
// Disable the crypt keeper.
PackageManager pm = getPackageManager();
ComponentName name = new ComponentName(this, CryptKeeper.class);
pm.setComponentEnabledSetting(name, PackageManager.COMPONENT_ENABLED_STATE_DISABLED, 0);
return;
}
// Check to see why we were started.
String progress = SystemProperties.get("vold.encrypt_progress");
if (!"".equals(progress)) {
setContentView(R.layout.crypt_keeper_progress);
encryptionProgressInit();
} else {
setContentView(R.layout.crypt_keeper_password_entry);
passwordEntryInit();
}
}
private void encryptionProgressInit() {
mHandler.sendEmptyMessage(UPDATE_PROGRESS);
}
private void passwordEntryInit() {
TextView passwordEntry = (TextView) findViewById(R.id.passwordEntry);
passwordEntry.setOnEditorActionListener(this);
KeyboardView keyboardView = (PasswordEntryKeyboardView) findViewById(R.id.keyboard);
PasswordEntryKeyboardHelper keyboardHelper = new PasswordEntryKeyboardHelper(this,
keyboardView, passwordEntry, false);
keyboardHelper.setKeyboardMode(PasswordEntryKeyboardHelper.KEYBOARD_MODE_ALPHA);
passwordEntry.setCompoundDrawablesWithIntrinsicBounds(android.R.drawable.ic_lock_idle_lock,
0, 0, 0);
String dateFormatString = getString(com.android.internal.R.string.full_wday_month_day_no_year);
TextView date = (TextView) findViewById(R.id.date);
date.setText(DateFormat.format(dateFormatString, new Date()));
// Disable the status bar
StatusBarManager sbm = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
sbm.disable(StatusBarManager.DISABLE_EXPAND | StatusBarManager.DISABLE_NOTIFICATION_ICONS
| StatusBarManager.DISABLE_NOTIFICATION_ALERTS
| StatusBarManager.DISABLE_SYSTEM_INFO | StatusBarManager.DISABLE_NAVIGATION);
}
private IMountService getMountService() {
IBinder service = ServiceManager.getService("mount");
if (service != null) {
return IMountService.Stub.asInterface(service);
}
return null;
}
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_NULL) {
// Get the password
String password = v.getText().toString();
if (TextUtils.isEmpty(password)) {
return true;
}
// Now that we have the password clear the password field.
v.setText(null);
IMountService service = getMountService();
try {
service.decryptStorage(password);
// For now the only way to get here is for the password to be
// wrong.
mFailedAttempts++;
if (mFailedAttempts == MAX_FAILED_ATTEMPTS) {
// Factory reset the device.
sendBroadcast(new Intent("android.intent.action.MASTER_CLEAR"));
} else if ((mFailedAttempts % COOL_DOWN_ATTEMPTS) == 0) {
mCooldown = COOL_DOWN_INTERVAL;
EditText passwordEntry = (EditText) findViewById(R.id.passwordEntry);
passwordEntry.setEnabled(false);
mHandler.sendEmptyMessage(COOLDOWN);
} else {
TextView tv = (TextView) findViewById(R.id.status);
tv.setText(R.string.try_again);
}
} catch (Exception e) {
Log.e(TAG, "Error while decrypting...", e);
}
return true;
}
return false;
}
}
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