/*
* 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 android.app.Activity;
import android.app.StatusBarManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.ActivityInfo;
import android.content.pm.PackageManager;
import android.content.res.Resources.NotFoundException;
import android.media.AudioManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.os.PowerManager;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.os.SystemProperties;
import android.os.UserHandle;
import android.os.storage.IMountService;
import android.os.storage.StorageManager;
import android.provider.Settings;
import android.telecom.TelecomManager;
import android.telephony.TelephonyManager;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.text.format.DateUtils;
import android.util.Log;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnKeyListener;
import android.view.View.OnTouchListener;
import android.view.WindowManager;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodInfo;
import android.view.inputmethod.InputMethodManager;
import android.view.inputmethod.InputMethodSubtype;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ProgressBar;
import android.widget.TextView;
import com.android.internal.telephony.PhoneConstants;
import com.android.internal.widget.LockPatternUtils;
import com.android.internal.widget.LockPatternView;
import com.android.internal.widget.LockPatternView.Cell;
import com.android.internal.widget.LockPatternView.DisplayMode;
import java.util.List;
/**
* Settings screens to show the UI flows for encrypting/decrypting the device.
*
* This may be started via adb for debugging the UI layout, without having to go through
* encryption flows everytime. It should be noted that starting the activity in this manner
* is only useful for verifying UI-correctness - the behavior will not be identical.
* <pre>
* $ adb shell pm enable com.android.settings/.CryptKeeper
* $ adb shell am start \
* -e "com.android.settings.CryptKeeper.DEBUG_FORCE_VIEW" "progress" \
* -n com.android.settings/.CryptKeeper
* </pre>
*/
public class CryptKeeper extends Activity implements TextView.OnEditorActionListener,
OnKeyListener, OnTouchListener, TextWatcher {
private static final String TAG = "CryptKeeper";
private static final String DECRYPT_STATE = "trigger_restart_framework";
/** Message sent to us to indicate encryption update progress. */
private static final int MESSAGE_UPDATE_PROGRESS = 1;
/** Message sent to us to indicate alerting the user that we are waiting for password entry */
private static final int MESSAGE_NOTIFY = 2;
// Constants used to control policy.
private static final int MAX_FAILED_ATTEMPTS = 30;
private static final int COOL_DOWN_ATTEMPTS = 10;
// Intent action for launching the Emergency Dialer activity.
static final String ACTION_EMERGENCY_DIAL = "com.android.phone.EmergencyDialer.DIAL";
// Debug Intent extras so that this Activity may be started via adb for debugging UI layouts
private static final String EXTRA_FORCE_VIEW =
"com.android.settings.CryptKeeper.DEBUG_FORCE_VIEW";
private static final String FORCE_VIEW_PROGRESS = "progress";
private static final String FORCE_VIEW_ERROR = "error";
private static final String FORCE_VIEW_PASSWORD = "password";
private static final String STATE_COOLDOWN = "cooldown";
/** When encryption is detected, this flag indicates whether or not we've checked for errors. */
private boolean mValidationComplete;
private boolean mValidationRequested;
/** A flag to indicate that the volume is in a bad state (e.g. partially encrypted). */
private boolean mEncryptionGoneBad;
/** If gone bad, should we show encryption failed (false) or corrupt (true)*/
private boolean mCorrupt;
/** A flag to indicate when the back event should be ignored */
/** When set, blocks unlocking. Set every COOL_DOWN_ATTEMPTS attempts, only cleared
by power cycling phone. */
private boolean mCooldown = false;
PowerManager.WakeLock mWakeLock;
private EditText mPasswordEntry;
private LockPatternView mLockPatternView;
/** Number of calls to {@link #notifyUser()} to ignore before notifying. */
private int mNotificationCountdown = 0;
/** Number of calls to {@link #notifyUser()} before we release the wakelock */
private int mReleaseWakeLockCountdown = 0;
private int mStatusString = R.string.enter_password;
// how long we wait to clear a wrong pattern
private static final int WRONG_PATTERN_CLEAR_TIMEOUT_MS = 1500;
// how long we wait to clear a right pattern
private static final int RIGHT_PATTERN_CLEAR_TIMEOUT_MS = 500;
// When the user enters a short pin/password, run this to show an error,
// but don't count it against attempts.
private final Runnable mFakeUnlockAttemptRunnable = new Runnable() {
@Override
public void run() {
handleBadAttempt(1 /* failedAttempt */);
}
};
// TODO: this should be tuned to match minimum decryption timeout
private static final int FAKE_ATTEMPT_DELAY = 1000;
private final Runnable mClearPatternRunnable = new Runnable() {
@Override
public void run() {
mLockPatternView.clearPattern();
}
};
/**
* Used to propagate state through configuration changes (e.g. screen rotation)
*/
private static class NonConfigurationInstanceState {
final PowerManager.WakeLock wakelock;
NonConfigurationInstanceState(PowerManager.WakeLock _wakelock) {
wakelock = _wakelock;
}
}
private class DecryptTask extends AsyncTask<String, Void, Integer> {
private void hide(int id) {
View view = findViewById(id);
if (view != null) {
view.setVisibility(View.GONE);
}
}
@Override
protected void onPreExecute() {
super.onPreExecute();
beginAttempt();
}
@Override
protected Integer doInBackground(String... params) {
final IMountService service = getMountService();
try {
return service.decryptStorage(params[0]);
} catch (Exception e) {
Log.e(TAG, "Error while decrypting...", e);
return -1;
}
}
@Override
protected void onPostExecute(Integer failedAttempts) {
if (failedAttempts == 0) {
// The password was entered successfully. Simply do nothing
// and wait for the service restart to switch to surfacefligner
if (mLockPatternView != null) {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
mLockPatternView.postDelayed(mClearPatternRunnable, RIGHT_PATTERN_CLEAR_TIMEOUT_MS);
}
final TextView status = (TextView) findViewById(R.id.status);
status.setText(R.string.starting_android);
hide(R.id.passwordEntry);
hide(R.id.switch_ime_button);
hide(R.id.lockPattern);
hide(R.id.owner_info);
hide(R.id.emergencyCallButton);
} else if (failedAttempts == MAX_FAILED_ATTEMPTS) {
// Factory reset the device.
Intent intent = new Intent(Intent.ACTION_MASTER_CLEAR);
intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
intent.putExtra(Intent.EXTRA_REASON, "CryptKeeper.MAX_FAILED_ATTEMPTS");
sendBroadcast(intent);
} else if (failedAttempts == -1) {
// Right password, but decryption failed. Tell user bad news ...
setContentView(R.layout.crypt_keeper_progress);
showFactoryReset(true);
return;
} else {
handleBadAttempt(failedAttempts);
}
}
}
private void beginAttempt() {
final TextView status = (TextView) findViewById(R.id.status);
status.setText(R.string.checking_decryption);
}
private void handleBadAttempt(Integer failedAttempts) {
// Wrong entry. Handle pattern case.
if (mLockPatternView != null) {
mLockPatternView.setDisplayMode(DisplayMode.Wrong);
mLockPatternView.removeCallbacks(mClearPatternRunnable);
mLockPatternView.postDelayed(mClearPatternRunnable, WRONG_PATTERN_CLEAR_TIMEOUT_MS);
}
if ((failedAttempts % COOL_DOWN_ATTEMPTS) == 0) {
mCooldown = true;
// No need to setBackFunctionality(false) - it's already done
// at this point.
cooldown();
} else {
final TextView status = (TextView) findViewById(R.id.status);
int remainingAttempts = MAX_FAILED_ATTEMPTS - failedAttempts;
if (remainingAttempts < COOL_DOWN_ATTEMPTS) {
CharSequence warningTemplate = getText(R.string.crypt_keeper_warn_wipe);
CharSequence warning = TextUtils.expandTemplate(warningTemplate,
Integer.toString(remainingAttempts));
status.setText(warning);
} else {
int passwordType = StorageManager.CRYPT_TYPE_PASSWORD;
try {
final IMountService service = getMountService();
passwordType = service.getPasswordType();
} catch (Exception e) {
Log.e(TAG, "Error calling mount service " + e);
}
if (passwordType == StorageManager.CRYPT_TYPE_PIN) {
status.setText(R.string.cryptkeeper_wrong_pin);
} else if (passwordType == StorageManager.CRYPT_TYPE_PATTERN) {
status.setText(R.string.cryptkeeper_wrong_pattern);
} else {
status.setText(R.string.cryptkeeper_wrong_password);
}
}
if (mLockPatternView != null) {
mLockPatternView.setDisplayMode(DisplayMode.Wrong);
mLockPatternView.setEnabled(true);
}
// Reenable the password entry
if (mPasswordEntry != null) {
mPasswordEntry.setEnabled(true);
final InputMethodManager imm = (InputMethodManager) getSystemService(
Context.INPUT_METHOD_SERVICE);
imm.showSoftInput(mPasswordEntry, 0);
setBackFunctionality(true);
}
}
}
private class ValidationTask extends AsyncTask<Void, Void, Boolean> {
int state;
@Override
protected Boolean doInBackground(Void... params) {
final IMountService service = getMountService();
try {
Log.d(TAG, "Validating encryption state.");
state = service.getEncryptionState();
if (state == IMountService.ENCRYPTION_STATE_NONE) {
Log.w(TAG, "Unexpectedly in CryptKeeper even though there is no encryption.");
return true; // Unexpected, but fine, I guess...
}
return state == IMountService.ENCRYPTION_STATE_OK;
} catch (RemoteException e) {
Log.w(TAG, "Unable to get encryption state properly");
return true;
}
}
@Override
protected void onPostExecute(Boolean result) {
mValidationComplete = true;
if (Boolean.FALSE.equals(result)) {
Log.w(TAG, "Incomplete, or corrupted encryption detected. Prompting user to wipe.");
mEncryptionGoneBad = true;
mCorrupt = state == IMountService.ENCRYPTION_STATE_ERROR_CORRUPT;
} else {
Log.d(TAG, "Encryption state validated. Proceeding to configure UI");
}
setupUi();
}
}
private final Handler mHandler = new Handler() {
@Override
public void handleMessage(Message msg) {
switch (msg.what) {
case MESSAGE_UPDATE_PROGRESS:
updateProgress();
break;
case MESSAGE_NOTIFY:
notifyUser();
break;
}
}
};
private AudioManager mAudioManager;
/** The status bar where back/home/recent buttons are shown. */
private StatusBarManager mStatusBar;
/** All the widgets to disable in the status bar */
final private static int sWidgetsToDisable = StatusBarManager.DISABLE_EXPAND
| StatusBarManager.DISABLE_NOTIFICATION_ICONS
| StatusBarManager.DISABLE_NOTIFICATION_ALERTS
| StatusBarManager.DISABLE_HOME
| StatusBarManager.DISABLE_SEARCH
| StatusBarManager.DISABLE_RECENT;
protected static final int MIN_LENGTH_BEFORE_REPORT = LockPatternUtils.MIN_LOCK_PATTERN_SIZE;
/** @return whether or not this Activity was started for debugging the UI only. */
private boolean isDebugView() {
return getIntent().hasExtra(EXTRA_FORCE_VIEW);
}
/** @return whether or not this Activity was started for debugging the specific UI view only. */
private boolean isDebugView(String viewType /* non-nullable */) {
return viewType.equals(getIntent().getStringExtra(EXTRA_FORCE_VIEW));
}
/**
* Notify the user that we are awaiting input. Currently this sends an audio alert.
*/
private void notifyUser() {
if (mNotificationCountdown > 0) {
--mNotificationCountdown;
} else if (mAudioManager != null) {
try {
// Play the standard keypress sound at full volume. This should be available on
// every device. We cannot play a ringtone here because media services aren't
// available yet. A DTMF-style tone is too soft to be noticed, and might not exist
// on tablet devices. The idea is to alert the user that something is needed: this
// does not have to be pleasing.
mAudioManager.playSoundEffect(AudioManager.FX_KEYPRESS_STANDARD, 100);
} catch (Exception e) {
Log.w(TAG, "notifyUser: Exception while playing sound: " + e);
}
}
// Notify the user again in 5 seconds.
mHandler.removeMessages(MESSAGE_NOTIFY);
mHandler.sendEmptyMessageDelayed(MESSAGE_NOTIFY, 5 * 1000);
if (mWakeLock.isHeld()) {
if (mReleaseWakeLockCountdown > 0) {
--mReleaseWakeLockCountdown;
} else {
mWakeLock.release();
}
}
}
/**
* Ignore back events from this activity always - there's nowhere to go back
* to
*/
@Override
public void onBackPressed() {
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// If we are not encrypted or encrypting, get out quickly.
final String state = SystemProperties.get("vold.decrypt");
if (!isDebugView() && ("".equals(state) || DECRYPT_STATE.equals(state))) {
disableCryptKeeperComponent(this);
// Typically CryptKeeper is launched as the home app. We didn't
// want to be running, so need to finish this activity. We can count
// on the activity manager re-launching the new home app upon finishing
// this one, since this will leave the activity stack empty.
// NOTE: This is really grungy. I think it would be better for the
// activity manager to explicitly launch the crypt keeper instead of
// home in the situation where we need to decrypt the device
finish();
return;
}
try {
if (getResources().getBoolean(R.bool.crypt_keeper_allow_rotation)) {
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}
} catch (NotFoundException e) {
}
// Disable the status bar, but do NOT disable back because the user needs a way to go
// from keyboard settings and back to the password screen.
mStatusBar = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
mStatusBar.disable(sWidgetsToDisable);
if (savedInstanceState != null) {
mCooldown = savedInstanceState.getBoolean(STATE_COOLDOWN);
}
setAirplaneModeIfNecessary();
mAudioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
// Check for (and recover) retained instance data
final Object lastInstance = getLastNonConfigurationInstance();
if (lastInstance instanceof NonConfigurationInstanceState) {
NonConfigurationInstanceState retained = (NonConfigurationInstanceState) lastInstance;
mWakeLock = retained.wakelock;
Log.d(TAG, "Restoring wakelock from NonConfigurationInstanceState");
}
}
@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
savedInstanceState.putBoolean(STATE_COOLDOWN, mCooldown);
}
/**
* Note, we defer the state check and screen setup to onStart() because this will be
* re-run if the user clicks the power button (sleeping/waking the screen), and this is
* especially important if we were to lose the wakelock for any reason.
*/
@Override
public void onStart() {
super.onStart();
setupUi();
}
/**
* Initializes the UI based on the current state of encryption.
* This is idempotent - calling repeatedly will simply re-initialize the UI.
*/
private void setupUi() {
if (mEncryptionGoneBad || isDebugView(FORCE_VIEW_ERROR)) {
setContentView(R.layout.crypt_keeper_progress);
showFactoryReset(mCorrupt);
return;
}
final String progress = SystemProperties.get("vold.encrypt_progress");
if (!"".equals(progress) || isDebugView(FORCE_VIEW_PROGRESS)) {
setContentView(R.layout.crypt_keeper_progress);
encryptionProgressInit();
} else if (mValidationComplete || isDebugView(FORCE_VIEW_PASSWORD)) {
new AsyncTask<Void, Void, Void>() {
int passwordType = StorageManager.CRYPT_TYPE_PASSWORD;
String owner_info;
boolean pattern_visible;
boolean password_visible;
@Override
public Void doInBackground(Void... v) {
try {
final IMountService service = getMountService();
passwordType = service.getPasswordType();
owner_info = service.getField(StorageManager.OWNER_INFO_KEY);
pattern_visible = !("0".equals(service.getField(StorageManager.PATTERN_VISIBLE_KEY)));
password_visible = !("0".equals(service.getField(StorageManager.PASSWORD_VISIBLE_KEY)));
} catch (Exception e) {
Log.e(TAG, "Error calling mount service " + e);
}
return null;
}
@Override
public void onPostExecute(java.lang.Void v) {
Settings.System.putInt(getContentResolver(), Settings.System.TEXT_SHOW_PASSWORD,
password_visible ? 1 : 0);
if (passwordType == StorageManager.CRYPT_TYPE_PIN) {
setContentView(R.layout.crypt_keeper_pin_entry);
mStatusString = R.string.enter_pin;
} else if (passwordType == StorageManager.CRYPT_TYPE_PATTERN) {
setContentView(R.layout.crypt_keeper_pattern_entry);
setBackFunctionality(false);
mStatusString = R.string.enter_pattern;
} else {
setContentView(R.layout.crypt_keeper_password_entry);
mStatusString = R.string.enter_password;
}
final TextView status = (TextView) findViewById(R.id.status);
status.setText(mStatusString);
final TextView ownerInfo = (TextView) findViewById(R.id.owner_info);
ownerInfo.setText(owner_info);
ownerInfo.setSelected(true); // Required for marquee'ing to work
passwordEntryInit();
findViewById(android.R.id.content).setSystemUiVisibility(View.STATUS_BAR_DISABLE_BACK);
if (mLockPatternView != null) {
mLockPatternView.setInStealthMode(!pattern_visible);
}
if (mCooldown) {
// in case we are cooling down and coming back from emergency dialler
setBackFunctionality(false);
cooldown();
}
}
}.execute();
} else if (!mValidationRequested) {
// We're supposed to be encrypted, but no validation has been done.
new ValidationTask().execute((Void[]) null);
mValidationRequested = true;
}
}
@Override
public void onStop() {
super.onStop();
mHandler.removeMessages(MESSAGE_UPDATE_PROGRESS);
mHandler.removeMessages(MESSAGE_NOTIFY);
}
/**
* Reconfiguring, so propagate the wakelock to the next instance. This runs between onStop()
* and onDestroy() and only if we are changing configuration (e.g. rotation). Also clears
* mWakeLock so the subsequent call to onDestroy does not release it.
*/
@Override
public Object onRetainNonConfigurationInstance() {
NonConfigurationInstanceState state = new NonConfigurationInstanceState(mWakeLock);
Log.d(TAG, "Handing wakelock off to NonConfigurationInstanceState");
mWakeLock = null;
return state;
}
@Override
public void onDestroy() {
super.onDestroy();
if (mWakeLock != null) {
Log.d(TAG, "Releasing and destroying wakelock");
mWakeLock.release();
mWakeLock = null;
}
}
/**
* Start encrypting the device.
*/
private void encryptionProgressInit() {
// Accquire a partial wakelock to prevent the device from sleeping. Note
// we never release this wakelock as we will be restarted after the device
// is encrypted.
Log.d(TAG, "Encryption progress screen initializing.");
if (mWakeLock == null) {
Log.d(TAG, "Acquiring wakelock.");
PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
mWakeLock.acquire();
}
((ProgressBar) findViewById(R.id.progress_bar)).setIndeterminate(true);
// Ignore all back presses from now, both hard and soft keys.
setBackFunctionality(false);
// Start the first run of progress manually. This method sets up messages to occur at
// repeated intervals.
updateProgress();
}
/**
* Show factory reset screen allowing the user to reset their phone when
* there is nothing else we can do
* @param corrupt true if userdata is corrupt, false if encryption failed
* partway through
*/
private void showFactoryReset(final boolean corrupt) {
// Hide the encryption-bot to make room for the "factory reset" button
findViewById(R.id.encroid).setVisibility(View.GONE);
// Show the reset button, failure text, and a divider
final Button button = (Button) findViewById(R.id.factory_reset);
button.setVisibility(View.VISIBLE);
button.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// Factory reset the device.
Intent intent = new Intent(Intent.ACTION_MASTER_CLEAR);
intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND);
intent.putExtra(Intent.EXTRA_REASON,
"CryptKeeper.showFactoryReset() corrupt=" + corrupt);
sendBroadcast(intent);
}
});
// Alert the user of the failure.
if (corrupt) {
((TextView) findViewById(R.id.title)).setText(R.string.crypt_keeper_data_corrupt_title);
((TextView) findViewById(R.id.status)).setText(R.string.crypt_keeper_data_corrupt_summary);
} else {
((TextView) findViewById(R.id.title)).setText(R.string.crypt_keeper_failed_title);
((TextView) findViewById(R.id.status)).setText(R.string.crypt_keeper_failed_summary);
}
final View view = findViewById(R.id.bottom_divider);
// TODO(viki): Why would the bottom divider be missing in certain layouts? Investigate.
if (view != null) {
view.setVisibility(View.VISIBLE);
}
}
private void updateProgress() {
final String state = SystemProperties.get("vold.encrypt_progress");
if ("error_partially_encrypted".equals(state)) {
showFactoryReset(false);
return;
}
// Get status as percentage first
CharSequence status = getText(R.string.crypt_keeper_setup_description);
int percent = 0;
try {
// Force a 50% progress state when debugging the view.
percent = isDebugView() ? 50 : Integer.parseInt(state);
} catch (Exception e) {
Log.w(TAG, "Error parsing progress: " + e.toString());
}
String progress = Integer.toString(percent);
// Now try to get status as time remaining and replace as appropriate
Log.v(TAG, "Encryption progress: " + progress);
try {
final String timeProperty = SystemProperties.get("vold.encrypt_time_remaining");
int time = Integer.parseInt(timeProperty);
if (time >= 0) {
// Round up to multiple of 10 - this way display is less jerky
time = (time + 9) / 10 * 10;
progress = DateUtils.formatElapsedTime(time);
status = getText(R.string.crypt_keeper_setup_time_remaining);
}
} catch (Exception e) {
// Will happen if no time etc - show percentage
}
final TextView tv = (TextView) findViewById(R.id.status);
if (tv != null) {
tv.setText(TextUtils.expandTemplate(status, progress));
}
// Check the progress every 1 seconds
mHandler.removeMessages(MESSAGE_UPDATE_PROGRESS);
mHandler.sendEmptyMessageDelayed(MESSAGE_UPDATE_PROGRESS, 1000);
}
/** Insist on a power cycle to force the user to waste time between retries.
*
* Call setBackFunctionality(false) before calling this. */
private void cooldown() {
// Disable the password entry.
if (mPasswordEntry != null) {
mPasswordEntry.setEnabled(false);
}
if (mLockPatternView != null) {
mLockPatternView.setEnabled(false);
}
final TextView status = (TextView) findViewById(R.id.status);
status.setText(R.string.crypt_keeper_force_power_cycle);
}
/**
* Sets the back status: enabled or disabled according to the parameter.
* @param isEnabled true if back is enabled, false otherwise.
*/
private final void setBackFunctionality(boolean isEnabled) {
if (isEnabled) {
mStatusBar.disable(sWidgetsToDisable);
} else {
mStatusBar.disable(sWidgetsToDisable | StatusBarManager.DISABLE_BACK);
}
}
private void fakeUnlockAttempt(View postingView) {
beginAttempt();
postingView.postDelayed(mFakeUnlockAttemptRunnable, FAKE_ATTEMPT_DELAY);
}
protected LockPatternView.OnPatternListener mChooseNewLockPatternListener =
new LockPatternView.OnPatternListener() {
@Override
public void onPatternStart() {
mLockPatternView.removeCallbacks(mClearPatternRunnable);
}
@Override
public void onPatternCleared() {
}
@Override
public void onPatternDetected(List<LockPatternView.Cell> pattern) {
mLockPatternView.setEnabled(false);
if (pattern.size() >= MIN_LENGTH_BEFORE_REPORT) {
new DecryptTask().execute(LockPatternUtils.patternToString(pattern));
} else {
// Allow user to make as many of these as they want.
fakeUnlockAttempt(mLockPatternView);
}
}
@Override
public void onPatternCellAdded(List<Cell> pattern) {
}
};
private void passwordEntryInit() {
// Password/pin case
mPasswordEntry = (EditText) findViewById(R.id.passwordEntry);
if (mPasswordEntry != null){
mPasswordEntry.setOnEditorActionListener(this);
mPasswordEntry.requestFocus();
// Become quiet when the user interacts with the Edit text screen.
mPasswordEntry.setOnKeyListener(this);
mPasswordEntry.setOnTouchListener(this);
mPasswordEntry.addTextChangedListener(this);
}
// Pattern case
mLockPatternView = (LockPatternView) findViewById(R.id.lockPattern);
if (mLockPatternView != null) {
mLockPatternView.setOnPatternListener(mChooseNewLockPatternListener);
}
// Disable the Emergency call button if the device has no voice telephone capability
if (!getTelephonyManager().isVoiceCapable()) {
final View emergencyCall = findViewById(R.id.emergencyCallButton);
if (emergencyCall != null) {
Log.d(TAG, "Removing the emergency Call button");
emergencyCall.setVisibility(View.GONE);
}
}
final View imeSwitcher = findViewById(R.id.switch_ime_button);
final InputMethodManager imm = (InputMethodManager) getSystemService(
Context.INPUT_METHOD_SERVICE);
if (imeSwitcher != null && hasMultipleEnabledIMEsOrSubtypes(imm, false)) {
imeSwitcher.setVisibility(View.VISIBLE);
imeSwitcher.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
imm.showInputMethodPicker(false /* showAuxiliarySubtypes */);
}
});
}
// We want to keep the screen on while waiting for input. In minimal boot mode, the device
// is completely non-functional, and we want the user to notice the device and enter a
// password.
if (mWakeLock == null) {
Log.d(TAG, "Acquiring wakelock.");
final PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
if (pm != null) {
mWakeLock = pm.newWakeLock(PowerManager.FULL_WAKE_LOCK, TAG);
mWakeLock.acquire();
// Keep awake for 10 minutes - if the user hasn't been alerted by then
// best not to just drain their battery
mReleaseWakeLockCountdown = 96; // 96 * 5 secs per click + 120 secs before we show this = 600
}
}
// Asynchronously throw up the IME, since there are issues with requesting it to be shown
// immediately.
if (mLockPatternView == null && !mCooldown) {
getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
mHandler.postDelayed(new Runnable() {
@Override public void run() {
imm.showSoftInputUnchecked(0, null);
}
}, 0);
}
updateEmergencyCallButtonState();
// Notify the user in 120 seconds that we are waiting for him to enter the password.
mHandler.removeMessages(MESSAGE_NOTIFY);
mHandler.sendEmptyMessageDelayed(MESSAGE_NOTIFY, 120 * 1000);
// Dismiss secure & non-secure keyguards while this screen is showing.
getWindow().addFlags(WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD
| WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED);
}
/**
* 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);
setBackFunctionality(false);
if (password.length() >= LockPatternUtils.MIN_LOCK_PATTERN_SIZE) {
new DecryptTask().execute(password);
} else {
// Allow user to make as many of these as they want.
fakeUnlockAttempt(mPasswordEntry);
}
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 =
getTelephonyManager().getLteOnCdmaMode() == PhoneConstants.LTE_ON_CDMA_TRUE;
if (!isLteDevice) {
Log.d(TAG, "Going into airplane mode.");
Settings.Global.putInt(getContentResolver(), Settings.Global.AIRPLANE_MODE_ON, 1);
final Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
intent.putExtra("state", true);
sendBroadcastAsUser(intent, UserHandle.ALL);
}
}
/**
* 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;
}
int textId;
if (getTelecomManager().isInCall()) {
// Show "return to call"
textId = R.string.cryptkeeper_return_to_call;
} else {
textId = R.string.cryptkeeper_emergency_call;
}
emergencyCall.setText(textId);
}
private boolean isEmergencyCallCapable() {
return getResources().getBoolean(com.android.internal.R.bool.config_voice_capable);
}
private void takeEmergencyCallAction() {
TelecomManager telecomManager = getTelecomManager();
if (telecomManager.isInCall()) {
telecomManager.showInCallScreen(false /* showDialpad */);
} else {
launchEmergencyDialer();
}
}
private void launchEmergencyDialer() {
final Intent intent = new Intent(ACTION_EMERGENCY_DIAL);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
setBackFunctionality(true);
startActivity(intent);
}
private TelephonyManager getTelephonyManager() {
return (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
}
private TelecomManager getTelecomManager() {
return (TelecomManager) getSystemService(Context.TELECOM_SERVICE);
}
/**
* Listen to key events so we can disable sounds when we get a keyinput in EditText.
*/
private void delayAudioNotification() {
mNotificationCountdown = 20;
}
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
delayAudioNotification();
return false;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
delayAudioNotification();
return false;
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
return;
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
delayAudioNotification();
}
@Override
public void afterTextChanged(Editable s) {
return;
}
private static void disableCryptKeeperComponent(Context context) {
PackageManager pm = context.getPackageManager();
ComponentName name = new ComponentName(context, CryptKeeper.class);
Log.d(TAG, "Disabling component " + name);
pm.setComponentEnabledSetting(name, PackageManager.COMPONENT_ENABLED_STATE_DISABLED,
PackageManager.DONT_KILL_APP);
}
}