4d2bfd1491
Requires frameworks/base change I04eb2245. Bug: 5380495 Change-Id: Ia9e5c25e224b38c1cdad4cd725fc425de90f8344
586 lines
22 KiB
Java
586 lines
22 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.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 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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private static final int UPDATE_PROGRESS = 1;
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private static final int COOLDOWN = 2;
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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_ENTRY = "entry";
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private static final String FORCE_VIEW_ERROR = "error";
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/** When encryption is detected, this flag indivates whether or not we've checked for erros. */
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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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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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// This activity is used to fade the screen to black after the password is entered.
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public static class Blank 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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}
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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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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, Blank.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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TextView tv = (TextView) findViewById(R.id.status);
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tv.setText(R.string.try_again);
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tv.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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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 UPDATE_PROGRESS:
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updateProgress();
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break;
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case COOLDOWN:
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cooldown();
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break;
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}
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}
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};
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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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@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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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, 0);
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return;
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}
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// Disable the status bar
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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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| StatusBarManager.DISABLE_BACK);
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// Check for (and recover) retained instance data
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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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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) {
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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(COOLDOWN);
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mHandler.removeMessages(UPDATE_PROGRESS);
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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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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 progressBar = (ProgressBar) findViewById(R.id.progress_bar);
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progressBar.setIndeterminate(true);
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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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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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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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TextView tv = (TextView) findViewById(R.id.title);
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tv.setText(R.string.crypt_keeper_failed_title);
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tv = (TextView) findViewById(R.id.status);
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tv.setText(R.string.crypt_keeper_failed_summary);
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View view = findViewById(R.id.bottom_divider);
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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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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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CharSequence status = getText(R.string.crypt_keeper_setup_description);
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Log.v(TAG, "Encryption progress: " + progress);
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TextView tv = (TextView) findViewById(R.id.status);
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tv.setText(TextUtils.expandTemplate(status, Integer.toString(progress)));
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// Check the progress every 5 seconds
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mHandler.removeMessages(UPDATE_PROGRESS);
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mHandler.sendEmptyMessageDelayed(UPDATE_PROGRESS, 5000);
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}
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private void cooldown() {
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TextView tv = (TextView) findViewById(R.id.status);
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if (mCooldown <= 0) {
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// Re-enable the password entry
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mPasswordEntry.setEnabled(true);
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tv.setVisibility(View.GONE);
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} else {
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CharSequence template = getText(R.string.crypt_keeper_cooldown);
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tv.setText(TextUtils.expandTemplate(template, Integer.toString(mCooldown)));
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tv.setVisibility(View.VISIBLE);
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mCooldown--;
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mHandler.removeMessages(COOLDOWN);
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mHandler.sendEmptyMessageDelayed(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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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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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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// Asynchronously throw up the IME, since there are issues with requesting it to be shown
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// immediately.
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mHandler.postDelayed(new Runnable() {
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@Override public void run() {
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imm.showSoftInputUnchecked(0, null);
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}
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}, 0);
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updateEmergencyCallButtonState();
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}
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/**
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* Method adapted from com.android.inputmethod.latin.Utils
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*
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* @param imm The input method manager
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* @param shouldIncludeAuxiliarySubtypes
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* @return true if we have multiple IMEs to choose from
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*/
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private boolean hasMultipleEnabledIMEsOrSubtypes(InputMethodManager imm,
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final boolean shouldIncludeAuxiliarySubtypes) {
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final List<InputMethodInfo> enabledImis = imm.getEnabledInputMethodList();
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// Number of the filtered IMEs
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int filteredImisCount = 0;
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for (InputMethodInfo imi : enabledImis) {
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// We can return true immediately after we find two or more filtered IMEs.
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if (filteredImisCount > 1) return true;
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final List<InputMethodSubtype> subtypes =
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imm.getEnabledInputMethodSubtypeList(imi, true);
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// IMEs that have no subtypes should be counted.
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if (subtypes.isEmpty()) {
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++filteredImisCount;
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continue;
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}
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int auxCount = 0;
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for (InputMethodSubtype subtype : subtypes) {
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if (subtype.isAuxiliary()) {
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++auxCount;
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}
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}
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final int nonAuxCount = subtypes.size() - auxCount;
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// IMEs that have one or more non-auxiliary subtypes should be counted.
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// If shouldIncludeAuxiliarySubtypes is true, IMEs that have two or more auxiliary
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// subtypes should be counted as well.
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if (nonAuxCount > 0 || (shouldIncludeAuxiliarySubtypes && auxCount > 1)) {
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++filteredImisCount;
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continue;
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}
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}
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return filteredImisCount > 1
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// imm.getEnabledInputMethodSubtypeList(null, false) will return the current IME's enabled
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// input method subtype (The current IME should be LatinIME.)
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|| imm.getEnabledInputMethodSubtypeList(null, false).size() > 1;
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}
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private IMountService getMountService() {
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IBinder service = ServiceManager.getService("mount");
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if (service != null) {
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return IMountService.Stub.asInterface(service);
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}
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return null;
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}
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@Override
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public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
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if (actionId == EditorInfo.IME_NULL || actionId == EditorInfo.IME_ACTION_DONE) {
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// Get the password
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String password = v.getText().toString();
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if (TextUtils.isEmpty(password)) {
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return true;
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}
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// Now that we have the password clear the password field.
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v.setText(null);
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// Disable the password entry while checking the password. This
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// we either be reenabled if the password was wrong or after the
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// cooldown period.
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mPasswordEntry.setEnabled(false);
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Log.d(TAG, "Attempting to send command to decrypt");
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new DecryptTask().execute(password);
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return true;
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}
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return false;
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}
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//
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// Code to update the state of, and handle clicks from, the "Emergency call" button.
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//
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// This code is mostly duplicated from the corresponding code in
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// LockPatternUtils and LockPatternKeyguardView under frameworks/base.
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//
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private void updateEmergencyCallButtonState() {
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Button button = (Button) findViewById(R.id.emergencyCallButton);
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// The button isn't present at all in some configurations.
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if (button == null) return;
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if (isEmergencyCallCapable()) {
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button.setVisibility(View.VISIBLE);
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button.setOnClickListener(new View.OnClickListener() {
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public void onClick(View v) {
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takeEmergencyCallAction();
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}
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});
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} else {
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button.setVisibility(View.GONE);
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return;
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}
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int newState = TelephonyManager.getDefault().getCallState();
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int textId;
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if (newState == TelephonyManager.CALL_STATE_OFFHOOK) {
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// show "return to call" text and show phone icon
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textId = R.string.cryptkeeper_return_to_call;
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int phoneCallIcon = R.drawable.stat_sys_phone_call;
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button.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0);
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} else {
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textId = R.string.cryptkeeper_emergency_call;
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int emergencyIcon = R.drawable.ic_emergency;
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button.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0);
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}
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button.setText(textId);
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}
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private boolean isEmergencyCallCapable() {
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return getResources().getBoolean(com.android.internal.R.bool.config_voice_capable);
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}
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private void takeEmergencyCallAction() {
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if (TelephonyManager.getDefault().getCallState() == TelephonyManager.CALL_STATE_OFFHOOK) {
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resumeCall();
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} else {
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launchEmergencyDialer();
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}
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}
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private void resumeCall() {
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ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
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if (phone != null) {
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try {
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phone.showCallScreen();
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} catch (RemoteException e) {
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Log.e(TAG, "Error calling ITelephony service: " + e);
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}
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}
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}
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private void launchEmergencyDialer() {
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Intent intent = new Intent(ACTION_EMERGENCY_DIAL);
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intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
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| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
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startActivity(intent);
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}
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}
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