698 lines
28 KiB
Java
698 lines
28 KiB
Java
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.settings;
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import android.app.Activity;
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import android.app.StatusBarManager;
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import android.content.ComponentName;
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import android.content.Context;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.media.AudioManager;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.IBinder;
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import android.os.Message;
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import android.os.PowerManager;
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import android.os.RemoteException;
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import android.os.ServiceManager;
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import android.os.SystemProperties;
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import android.os.storage.IMountService;
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import android.telephony.TelephonyManager;
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import android.text.TextUtils;
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import android.util.Log;
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import android.view.KeyEvent;
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import android.view.View;
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import android.view.View.OnClickListener;
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import android.view.inputmethod.EditorInfo;
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import android.view.inputmethod.InputMethodInfo;
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import android.view.inputmethod.InputMethodManager;
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import android.view.inputmethod.InputMethodSubtype;
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import android.widget.Button;
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import android.widget.EditText;
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import android.widget.ProgressBar;
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import android.widget.TextView;
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import com.android.internal.telephony.ITelephony;
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import com.android.internal.telephony.Phone;
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import java.util.List;
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/**
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* Settings screens to show the UI flows for encrypting/decrypting the device.
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*
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* This may be started via adb for debugging the UI layout, without having to go through
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* encryption flows everytime. It should be noted that starting the activity in this manner
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* is only useful for verifying UI-correctness - the behavior will not be identical.
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* <pre>
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* $ adb shell pm enable com.android.settings/.CryptKeeper
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* $ adb shell am start \
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* -e "com.android.settings.CryptKeeper.DEBUG_FORCE_VIEW" "progress" \
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* -n com.android.settings/.CryptKeeper
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* </pre>
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*/
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public class CryptKeeper extends Activity implements TextView.OnEditorActionListener {
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private static final String TAG = "CryptKeeper";
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private static final String DECRYPT_STATE = "trigger_restart_framework";
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/** Message sent to us to indicate encryption update progress. */
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private static final int MESSAGE_UPDATE_PROGRESS = 1;
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/** Message sent to us to cool-down (waste user's time between password attempts) */
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private static final int MESSAGE_COOLDOWN = 2;
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/** Message sent to us to indicate alerting the user that we are waiting for password entry */
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private static final int MESSAGE_NOTIFY = 3;
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// Constants used to control policy.
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private static final int MAX_FAILED_ATTEMPTS = 30;
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private static final int COOL_DOWN_ATTEMPTS = 10;
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private static final int COOL_DOWN_INTERVAL = 30; // 30 seconds
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// Intent action for launching the Emergency Dialer activity.
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static final String ACTION_EMERGENCY_DIAL = "com.android.phone.EmergencyDialer.DIAL";
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// Debug Intent extras so that this Activity may be started via adb for debugging UI layouts
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private static final String EXTRA_FORCE_VIEW =
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"com.android.settings.CryptKeeper.DEBUG_FORCE_VIEW";
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private static final String FORCE_VIEW_PROGRESS = "progress";
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private static final String FORCE_VIEW_ERROR = "error";
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private static final String FORCE_VIEW_PASSWORD = "password";
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/** When encryption is detected, this flag indicates whether or not we've checked for errors. */
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private boolean mValidationComplete;
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private boolean mValidationRequested;
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/** A flag to indicate that the volume is in a bad state (e.g. partially encrypted). */
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private boolean mEncryptionGoneBad;
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/** A flag to indicate when the back event should be ignored */
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private boolean mIgnoreBack = false;
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private int mCooldown;
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PowerManager.WakeLock mWakeLock;
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private EditText mPasswordEntry;
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/**
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* Used to propagate state through configuration changes (e.g. screen rotation)
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*/
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private static class NonConfigurationInstanceState {
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final PowerManager.WakeLock wakelock;
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NonConfigurationInstanceState(PowerManager.WakeLock _wakelock) {
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wakelock = _wakelock;
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}
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}
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/**
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* Activity used to fade the screen to black after the password is entered.
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*/
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public static class FadeToBlack extends Activity {
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.crypt_keeper_blank);
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}
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/** Ignore all back events. */
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@Override
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public void onBackPressed() {
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return;
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}
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}
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private class DecryptTask extends AsyncTask<String, Void, Integer> {
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@Override
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protected Integer doInBackground(String... params) {
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final IMountService service = getMountService();
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try {
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return service.decryptStorage(params[0]);
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} catch (Exception e) {
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Log.e(TAG, "Error while decrypting...", e);
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return -1;
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}
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}
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@Override
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protected void onPostExecute(Integer failedAttempts) {
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if (failedAttempts == 0) {
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// The password was entered successfully. Start the Blank activity
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// so this activity animates to black before the devices starts. Note
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// It has 1 second to complete the animation or it will be frozen
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// until the boot animation comes back up.
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Intent intent = new Intent(CryptKeeper.this, FadeToBlack.class);
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finish();
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startActivity(intent);
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} else if (failedAttempts == MAX_FAILED_ATTEMPTS) {
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// Factory reset the device.
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sendBroadcast(new Intent("android.intent.action.MASTER_CLEAR"));
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} else if ((failedAttempts % COOL_DOWN_ATTEMPTS) == 0) {
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mCooldown = COOL_DOWN_INTERVAL;
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cooldown();
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} else {
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final TextView status = (TextView) findViewById(R.id.status);
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status.setText(R.string.try_again);
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status.setVisibility(View.VISIBLE);
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// Reenable the password entry
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mPasswordEntry.setEnabled(true);
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}
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}
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}
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private class ValidationTask extends AsyncTask<Void, Void, Boolean> {
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@Override
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protected Boolean doInBackground(Void... params) {
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final IMountService service = getMountService();
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try {
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Log.d(TAG, "Validating encryption state.");
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int state = service.getEncryptionState();
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if (state == IMountService.ENCRYPTION_STATE_NONE) {
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Log.w(TAG, "Unexpectedly in CryptKeeper even though there is no encryption.");
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return true; // Unexpected, but fine, I guess...
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}
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return state == IMountService.ENCRYPTION_STATE_OK;
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} catch (RemoteException e) {
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Log.w(TAG, "Unable to get encryption state properly");
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return true;
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}
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}
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@Override
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protected void onPostExecute(Boolean result) {
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mValidationComplete = true;
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if (Boolean.FALSE.equals(result)) {
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Log.w(TAG, "Incomplete, or corrupted encryption detected. Prompting user to wipe.");
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mEncryptionGoneBad = true;
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} else {
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Log.d(TAG, "Encryption state validated. Proceeding to configure UI");
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}
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setupUi();
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}
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}
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private final Handler mHandler = new Handler() {
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@Override
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public void handleMessage(Message msg) {
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switch (msg.what) {
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case MESSAGE_UPDATE_PROGRESS:
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updateProgress();
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break;
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case MESSAGE_COOLDOWN:
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cooldown();
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break;
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case MESSAGE_NOTIFY:
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notifyUser();
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break;
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}
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}
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};
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private AudioManager mAudioManager;
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/** @return whether or not this Activity was started for debugging the UI only. */
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private boolean isDebugView() {
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return getIntent().hasExtra(EXTRA_FORCE_VIEW);
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}
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/** @return whether or not this Activity was started for debugging the specific UI view only. */
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private boolean isDebugView(String viewType /* non-nullable */) {
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return viewType.equals(getIntent().getStringExtra(EXTRA_FORCE_VIEW));
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}
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/**
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* Notify the user that we are awaiting input. Currently this sends an audio alert.
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*/
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private void notifyUser() {
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Log.d(TAG, "Notifying user that we are waiting for input...");
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if (mAudioManager != null) {
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try {
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// Play the standard keypress sound at full volume. This should be available on
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// every device. We cannot play a ringtone here because media services aren't
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// available yet. A DTMF-style tone is too soft to be noticed, and might not exist
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// on tablet devices. The idea is to alert the user that something is needed: this
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// does not have to be pleasing.
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mAudioManager.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, 100);
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} catch (Exception e) {
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Log.w(TAG, "notifyUser: Exception while playing sound: " + e);
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}
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}
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// Notify the user again in 5 seconds.
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mHandler.removeMessages(MESSAGE_NOTIFY);
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mHandler.sendEmptyMessageDelayed(MESSAGE_NOTIFY, 5 * 1000);
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}
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/**
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* Ignore back events after the user has entered the decrypt screen and while the device is
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* encrypting.
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*/
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@Override
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public void onBackPressed() {
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if (mIgnoreBack)
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return;
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super.onBackPressed();
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}
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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// If we are not encrypted or encrypting, get out quickly.
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final String state = SystemProperties.get("vold.decrypt");
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if (!isDebugView() && ("".equals(state) || DECRYPT_STATE.equals(state))) {
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// Disable the crypt keeper.
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PackageManager pm = getPackageManager();
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ComponentName name = new ComponentName(this, CryptKeeper.class);
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pm.setComponentEnabledSetting(name, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
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PackageManager.DONT_KILL_APP);
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// Typically CryptKeeper is launched as the home app. We didn't
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// want to be running, so need to finish this activity. We can count
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// on the activity manager re-launching the new home app upon finishing
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// this one, since this will leave the activity stack empty.
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// NOTE: This is really grungy. I think it would be better for the
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// activity manager to explicitly launch the crypt keeper instead of
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// home in the situation where we need to decrypt the device
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finish();
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return;
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}
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// Disable the status bar, but do NOT disable back because the user needs a way to go
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// from keyboard settings and back to the password screen.
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StatusBarManager sbm = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
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sbm.disable(StatusBarManager.DISABLE_EXPAND
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| StatusBarManager.DISABLE_NOTIFICATION_ICONS
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| StatusBarManager.DISABLE_NOTIFICATION_ALERTS
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| StatusBarManager.DISABLE_SYSTEM_INFO
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| StatusBarManager.DISABLE_HOME
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| StatusBarManager.DISABLE_RECENT);
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setAirplaneModeIfNecessary();
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mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
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// Check for (and recover) retained instance data
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final Object lastInstance = getLastNonConfigurationInstance();
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if (lastInstance instanceof NonConfigurationInstanceState) {
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NonConfigurationInstanceState retained = (NonConfigurationInstanceState) lastInstance;
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mWakeLock = retained.wakelock;
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Log.d(TAG, "Restoring wakelock from NonConfigurationInstanceState");
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}
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}
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/**
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* Note, we defer the state check and screen setup to onStart() because this will be
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* re-run if the user clicks the power button (sleeping/waking the screen), and this is
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* especially important if we were to lose the wakelock for any reason.
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*/
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@Override
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public void onStart() {
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super.onStart();
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setupUi();
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}
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/**
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* Initializes the UI based on the current state of encryption.
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* This is idempotent - calling repeatedly will simply re-initialize the UI.
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*/
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private void setupUi() {
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if (mEncryptionGoneBad || isDebugView(FORCE_VIEW_ERROR)) {
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setContentView(R.layout.crypt_keeper_progress);
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showFactoryReset();
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return;
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}
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final String progress = SystemProperties.get("vold.encrypt_progress");
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if (!"".equals(progress) || isDebugView(FORCE_VIEW_PROGRESS)) {
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setContentView(R.layout.crypt_keeper_progress);
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encryptionProgressInit();
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} else if (mValidationComplete || isDebugView(FORCE_VIEW_PASSWORD)) {
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setContentView(R.layout.crypt_keeper_password_entry);
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passwordEntryInit();
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} else if (!mValidationRequested) {
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// We're supposed to be encrypted, but no validation has been done.
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new ValidationTask().execute((Void[]) null);
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mValidationRequested = true;
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}
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}
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@Override
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public void onStop() {
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super.onStop();
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mHandler.removeMessages(MESSAGE_COOLDOWN);
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mHandler.removeMessages(MESSAGE_UPDATE_PROGRESS);
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mHandler.removeMessages(MESSAGE_NOTIFY);
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}
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/**
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* Reconfiguring, so propagate the wakelock to the next instance. This runs between onStop()
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* and onDestroy() and only if we are changing configuration (e.g. rotation). Also clears
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* mWakeLock so the subsequent call to onDestroy does not release it.
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*/
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@Override
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public Object onRetainNonConfigurationInstance() {
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NonConfigurationInstanceState state = new NonConfigurationInstanceState(mWakeLock);
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Log.d(TAG, "Handing wakelock off to NonConfigurationInstanceState");
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mWakeLock = null;
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return state;
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}
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@Override
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public void onDestroy() {
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super.onDestroy();
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if (mWakeLock != null) {
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Log.d(TAG, "Releasing and destroying wakelock");
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mWakeLock.release();
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mWakeLock = null;
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}
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}
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/**
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* Start encrypting the device.
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*/
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private void encryptionProgressInit() {
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// Accquire a partial wakelock to prevent the device from sleeping. Note
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// we never release this wakelock as we will be restarted after the device
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// is encrypted.
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Log.d(TAG, "Encryption progress screen initializing.");
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if (mWakeLock == null) {
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Log.d(TAG, "Acquiring wakelock.");
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PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
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mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
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mWakeLock.acquire();
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}
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((ProgressBar) findViewById(R.id.progress_bar)).setIndeterminate(true);
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// Ignore all back presses from now, both hard and soft keys.
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mIgnoreBack = true;
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// Start the first run of progress manually. This method sets up messages to occur at
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// repeated intervals.
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updateProgress();
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}
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private void showFactoryReset() {
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// Hide the encryption-bot to make room for the "factory reset" button
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findViewById(R.id.encroid).setVisibility(View.GONE);
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// Show the reset button, failure text, and a divider
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final Button button = (Button) findViewById(R.id.factory_reset);
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button.setVisibility(View.VISIBLE);
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button.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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// Factory reset the device.
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sendBroadcast(new Intent("android.intent.action.MASTER_CLEAR"));
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}
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});
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// Alert the user of the failure.
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((TextView) findViewById(R.id.title)).setText(R.string.crypt_keeper_failed_title);
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((TextView) findViewById(R.id.status)).setText(R.string.crypt_keeper_failed_summary);
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final View view = findViewById(R.id.bottom_divider);
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// TODO(viki): Why would the bottom divider be missing in certain layouts? Investigate.
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if (view != null) {
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view.setVisibility(View.VISIBLE);
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}
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}
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private void updateProgress() {
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final String state = SystemProperties.get("vold.encrypt_progress");
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if ("error_partially_encrypted".equals(state)) {
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showFactoryReset();
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return;
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}
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int progress = 0;
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try {
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// Force a 50% progress state when debugging the view.
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progress = isDebugView() ? 50 : Integer.parseInt(state);
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} catch (Exception e) {
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Log.w(TAG, "Error parsing progress: " + e.toString());
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}
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final CharSequence status = getText(R.string.crypt_keeper_setup_description);
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Log.v(TAG, "Encryption progress: " + progress);
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final TextView tv = (TextView) findViewById(R.id.status);
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if (tv != null) {
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tv.setText(TextUtils.expandTemplate(status, Integer.toString(progress)));
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}
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// Check the progress every 5 seconds
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mHandler.removeMessages(MESSAGE_UPDATE_PROGRESS);
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mHandler.sendEmptyMessageDelayed(MESSAGE_UPDATE_PROGRESS, 5000);
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}
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/** Disable password input for a while to force the user to waste time between retries */
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private void cooldown() {
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final TextView status = (TextView) findViewById(R.id.status);
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if (mCooldown <= 0) {
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// Re-enable the password entry and back presses.
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mPasswordEntry.setEnabled(true);
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mIgnoreBack = false;
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status.setVisibility(View.GONE);
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} else {
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CharSequence template = getText(R.string.crypt_keeper_cooldown);
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status.setText(TextUtils.expandTemplate(template, Integer.toString(mCooldown)));
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status.setVisibility(View.VISIBLE);
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mCooldown--;
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mHandler.removeMessages(MESSAGE_COOLDOWN);
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mHandler.sendEmptyMessageDelayed(MESSAGE_COOLDOWN, 1000); // Tick every second
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}
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}
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private void passwordEntryInit() {
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mPasswordEntry = (EditText) findViewById(R.id.passwordEntry);
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mPasswordEntry.setOnEditorActionListener(this);
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mPasswordEntry.requestFocus();
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final View imeSwitcher = findViewById(R.id.switch_ime_button);
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final InputMethodManager imm = (InputMethodManager) getSystemService(
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Context.INPUT_METHOD_SERVICE);
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if (imeSwitcher != null && hasMultipleEnabledIMEsOrSubtypes(imm, false)) {
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imeSwitcher.setVisibility(View.VISIBLE);
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imeSwitcher.setOnClickListener(new OnClickListener() {
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@Override
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public void onClick(View v) {
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imm.showInputMethodPicker();
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}
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});
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}
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// We want to keep the screen on while waiting for input. In minimal boot mode, the device
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// is completely non-functional, and we want the user to notice the device and enter a
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// password.
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if (mWakeLock == null) {
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Log.d(TAG, "Acquiring wakelock.");
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final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
|
|
if (pm != null) {
|
|
mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
|
|
mWakeLock.acquire();
|
|
}
|
|
}
|
|
// Asynchronously throw up the IME, since there are issues with requesting it to be shown
|
|
// immediately.
|
|
mHandler.postDelayed(new Runnable() {
|
|
@Override public void run() {
|
|
imm.showSoftInputUnchecked(0, null);
|
|
}
|
|
}, 0);
|
|
|
|
updateEmergencyCallButtonState();
|
|
// Notify the user in 30 seconds that we are waiting for him to enter the password.
|
|
mHandler.removeMessages(MESSAGE_NOTIFY);
|
|
mHandler.sendEmptyMessageDelayed(MESSAGE_NOTIFY, 30 * 1000);
|
|
}
|
|
|
|
/**
|
|
* Method adapted from com.android.inputmethod.latin.Utils
|
|
*
|
|
* @param imm The input method manager
|
|
* @param shouldIncludeAuxiliarySubtypes
|
|
* @return true if we have multiple IMEs to choose from
|
|
*/
|
|
private boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManager imm,
|
|
final boolean shouldIncludeAuxiliarySubtypes) {
|
|
final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
|
|
|
|
// Number of the filtered IMEs
|
|
int filteredImisCount = 0;
|
|
|
|
for (InputMethodInfo imi : enabledImis) {
|
|
// We can return true immediately after we find two or more filtered IMEs.
|
|
if (filteredImisCount > 1) return true;
|
|
final List<InputMethodSubtype> subtypes =
|
|
imm.getEnabledInputMethodSubtypeList(imi, true);
|
|
// IMEs that have no subtypes should be counted.
|
|
if (subtypes.isEmpty()) {
|
|
++filteredImisCount;
|
|
continue;
|
|
}
|
|
|
|
int auxCount = 0;
|
|
for (InputMethodSubtype subtype : subtypes) {
|
|
if (subtype.isAuxiliary()) {
|
|
++auxCount;
|
|
}
|
|
}
|
|
final int nonAuxCount = subtypes.size() - auxCount;
|
|
|
|
// IMEs that have one or more non-auxiliary subtypes should be counted.
|
|
// If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
|
|
// subtypes should be counted as well.
|
|
if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
|
|
++filteredImisCount;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
return filteredImisCount > 1
|
|
// imm.getEnabledInputMethodSubtypeList(null, false) will return the current IME's enabled
|
|
// input method subtype (The current IME should be LatinIME.)
|
|
|| imm.getEnabledInputMethodSubtypeList(null, false).size() > 1;
|
|
}
|
|
|
|
private IMountService getMountService() {
|
|
final 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 || actionId == EditorInfo.IME_ACTION_DONE) {
|
|
// Get the password
|
|
final String password = v.getText().toString();
|
|
|
|
if (TextUtils.isEmpty(password)) {
|
|
return true;
|
|
}
|
|
|
|
// Now that we have the password clear the password field.
|
|
v.setText(null);
|
|
|
|
// Disable the password entry and back keypress while checking the password. These
|
|
// we either be re-enabled if the password was wrong or after the cooldown period.
|
|
mPasswordEntry.setEnabled(false);
|
|
mIgnoreBack = true;
|
|
|
|
Log.d(TAG, "Attempting to send command to decrypt");
|
|
new DecryptTask().execute(password);
|
|
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Set airplane mode on the device if it isn't an LTE device.
|
|
* Full story: In minimal boot mode, we cannot save any state. In particular, we cannot save
|
|
* any incoming SMS's. So SMSs that are received here will be silently dropped to the floor.
|
|
* That is bad. Also, we cannot receive any telephone calls in this state. So to avoid
|
|
* both these problems, we turn the radio off. However, on certain networks turning on and
|
|
* off the radio takes a long time. In such cases, we are better off leaving the radio
|
|
* running so the latency of an E911 call is short.
|
|
* The behavior after this is:
|
|
* 1. Emergency dialing: the emergency dialer has logic to force the device out of
|
|
* airplane mode and restart the radio.
|
|
* 2. Full boot: we read the persistent settings from the previous boot and restore the
|
|
* radio to whatever it was before it restarted. This also happens when rebooting a
|
|
* phone that has no encryption.
|
|
*/
|
|
private final void setAirplaneModeIfNecessary() {
|
|
final boolean isLteDevice =
|
|
TelephonyManager.getDefault().getLteOnCdmaMode() == Phone.LTE_ON_CDMA_TRUE;
|
|
if (!isLteDevice) {
|
|
Log.d(TAG, "Going into airplane mode.");
|
|
final Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
|
|
intent.putExtra("state", true);
|
|
sendBroadcast(intent);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Code to update the state of, and handle clicks from, the "Emergency call" button.
|
|
*
|
|
* This code is mostly duplicated from the corresponding code in
|
|
* LockPatternUtils and LockPatternKeyguardView under frameworks/base.
|
|
*/
|
|
private void updateEmergencyCallButtonState() {
|
|
final Button emergencyCall = (Button) findViewById(R.id.emergencyCallButton);
|
|
// The button isn't present at all in some configurations.
|
|
if (emergencyCall == null)
|
|
return;
|
|
|
|
if (isEmergencyCallCapable()) {
|
|
emergencyCall.setVisibility(View.VISIBLE);
|
|
emergencyCall.setOnClickListener(new View.OnClickListener() {
|
|
@Override
|
|
|
|
public void onClick(View v) {
|
|
takeEmergencyCallAction();
|
|
}
|
|
});
|
|
} else {
|
|
emergencyCall.setVisibility(View.GONE);
|
|
return;
|
|
}
|
|
|
|
final int newState = TelephonyManager.getDefault().getCallState();
|
|
int textId;
|
|
if (newState == TelephonyManager.CALL_STATE_OFFHOOK) {
|
|
// Show "return to call" text and show phone icon
|
|
textId = R.string.cryptkeeper_return_to_call;
|
|
final int phoneCallIcon = R.drawable.stat_sys_phone_call;
|
|
emergencyCall.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0);
|
|
} else {
|
|
textId = R.string.cryptkeeper_emergency_call;
|
|
final int emergencyIcon = R.drawable.ic_emergency;
|
|
emergencyCall.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0);
|
|
}
|
|
emergencyCall.setText(textId);
|
|
}
|
|
|
|
private boolean isEmergencyCallCapable() {
|
|
return getResources().getBoolean(com.android.internal.R.bool.config_voice_capable);
|
|
}
|
|
|
|
private void takeEmergencyCallAction() {
|
|
if (TelephonyManager.getDefault().getCallState() == TelephonyManager.CALL_STATE_OFFHOOK) {
|
|
resumeCall();
|
|
} else {
|
|
launchEmergencyDialer();
|
|
}
|
|
}
|
|
|
|
private void resumeCall() {
|
|
final ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
|
|
if (phone != null) {
|
|
try {
|
|
phone.showCallScreen();
|
|
} catch (RemoteException e) {
|
|
Log.e(TAG, "Error calling ITelephony service: " + e);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void launchEmergencyDialer() {
|
|
final Intent intent = new Intent(ACTION_EMERGENCY_DIAL);
|
|
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
|
|
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
|
|
startActivity(intent);
|
|
}
|
|
}
|