src/com/android/settings/SecuritySettings.java

   1 /*
   2  * Copyright (C) 2007 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.android.settings;
  18
  19
  20 import static android.provider.Settings.System.SCREEN_OFF_TIMEOUT;
  21
  22 import android.app.Activity;
  23 import android.app.AlertDialog;
  24 import android.app.admin.DevicePolicyManager;
  25 import android.content.Context;
  26 import android.content.DialogInterface;
  27 import android.content.Intent;
  28 import android.os.Bundle;
  29 import android.os.Vibrator;
  30 import android.preference.CheckBoxPreference;
  31 import android.preference.ListPreference;
  32 import android.preference.Preference;
  33 import android.preference.Preference.OnPreferenceChangeListener;
  34 import android.preference.PreferenceGroup;
  35 import android.preference.PreferenceScreen;
  36 import android.provider.Settings;
  37 import android.security.KeyStore;
  38 import android.telephony.TelephonyManager;
  39 import android.util.Log;
  40
  41 import com.android.internal.telephony.Phone;
  42 import com.android.internal.widget.LockPatternUtils;
  43
  44 import java.util.ArrayList;
  45
  46 /**
  47  * Gesture lock pattern settings.
  48  */
  49 public class SecuritySettings extends SettingsPreferenceFragment
  50         implements OnPreferenceChangeListener, DialogInterface.OnClickListener {
  51
  52     // Lock Settings
  53     private static final String KEY_UNLOCK_SET_OR_CHANGE = "unlock_set_or_change";
  54     private static final String KEY_BIOMETRIC_WEAK_IMPROVE_MATCHING =
  55             "biometric_weak_improve_matching";
  56     private static final String KEY_LOCK_ENABLED = "lockenabled";
  57     private static final String KEY_VISIBLE_PATTERN = "visiblepattern";
  58     private static final String KEY_TACTILE_FEEDBACK_ENABLED = "unlock_tactile_feedback";
  59     private static final String KEY_SECURITY_CATEGORY = "security_category";
  60     private static final String KEY_LOCK_AFTER_TIMEOUT = "lock_after_timeout";
  61     private static final int SET_OR_CHANGE_LOCK_METHOD_REQUEST = 123;
  62     private static final int CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST = 124;
  63
  64     // Misc Settings
  65     private static final String KEY_SIM_LOCK = "sim_lock";
  66     private static final String KEY_SHOW_PASSWORD = "show_password";
  67     private static final String KEY_RESET_CREDENTIALS = "reset_credentials";
  68     private static final String KEY_TOGGLE_INSTALL_APPLICATIONS = "toggle_install_applications";
  69     private static final String KEY_POWER_INSTANTLY_LOCKS = "power_button_instantly_locks";
  70
  71     DevicePolicyManager mDPM;
  72
  73     private ChooseLockSettingsHelper mChooseLockSettingsHelper;
  74     private LockPatternUtils mLockPatternUtils;
  75     private ListPreference mLockAfter;
  76
  77     private CheckBoxPreference mVisiblePattern;
  78     private CheckBoxPreference mTactileFeedback;
  79
  80     private CheckBoxPreference mShowPassword;
  81
  82     private Preference mResetCredentials;
  83
  84     private CheckBoxPreference mToggleAppInstallation;
  85     private DialogInterface mWarnInstallApps;
  86     private CheckBoxPreference mPowerButtonInstantlyLocks;
  87
  88     @Override
  89     public void onCreate(Bundle savedInstanceState) {
  90         super.onCreate(savedInstanceState);
  91
  92         mLockPatternUtils = new LockPatternUtils(getActivity());
  93
  94         mDPM = (DevicePolicyManager)getSystemService(Context.DEVICE_POLICY_SERVICE);
  95
  96         mChooseLockSettingsHelper = new ChooseLockSettingsHelper(getActivity());
  97     }
  98
  99     private PreferenceScreen createPreferenceHierarchy() {
 100         PreferenceScreen root = getPreferenceScreen();
 101         if (root != null) {
 102             root.removeAll();
 103         }
 104         addPreferencesFromResource(R.xml.security_settings);
 105         root = getPreferenceScreen();
 106
 107         // Add options for lock/unlock screen
 108         int resid = 0;
 109         if (!mLockPatternUtils.isSecure()) {
 110             if (mLockPatternUtils.isLockScreenDisabled()) {
 111                 resid = R.xml.security_settings_lockscreen;
 112             } else {
 113                 resid = R.xml.security_settings_chooser;
 114             }
 115         } else if (mLockPatternUtils.usingBiometricWeak() &&
 116                 mLockPatternUtils.isBiometricWeakInstalled()) {
 117             resid = R.xml.security_settings_biometric_weak;
 118         } else {
 119             switch (mLockPatternUtils.getKeyguardStoredPasswordQuality()) {
 120                 case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING:
 121                     resid = R.xml.security_settings_pattern;
 122                     break;
 123                 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC:
 124                     resid = R.xml.security_settings_pin;
 125                     break;
 126                 case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC:
 127                 case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC:
 128                 case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX:
 129                     resid = R.xml.security_settings_password;
 130                     break;
 131             }
 132         }
 133         addPreferencesFromResource(resid);
 134
 135
 136         // Add options for device encryption
 137         DevicePolicyManager dpm =
 138                 (DevicePolicyManager) getSystemService(Context.DEVICE_POLICY_SERVICE);
 139
 140         switch (dpm.getStorageEncryptionStatus()) {
 141         case DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE:
 142             // The device is currently encrypted.
 143             addPreferencesFromResource(R.xml.security_settings_encrypted);
 144             break;
 145         case DevicePolicyManager.ENCRYPTION_STATUS_INACTIVE:
 146             // This device supports encryption but isn't encrypted.
 147             addPreferencesFromResource(R.xml.security_settings_unencrypted);
 148             break;
 149         }
 150
 151         // lock after preference
 152         mLockAfter = (ListPreference) root.findPreference(KEY_LOCK_AFTER_TIMEOUT);
 153         if (mLockAfter != null) {
 154             setupLockAfterPreference();
 155             updateLockAfterPreferenceSummary();
 156         }
 157
 158         // visible pattern
 159         mVisiblePattern = (CheckBoxPreference) root.findPreference(KEY_VISIBLE_PATTERN);
 160
 161         // lock instantly on power key press
 162         mPowerButtonInstantlyLocks = (CheckBoxPreference) root.findPreference(
 163                 KEY_POWER_INSTANTLY_LOCKS);
 164
 165         // don't display visible pattern if biometric and backup is not pattern
 166         if (resid == R.xml.security_settings_biometric_weak &&
 167                 mLockPatternUtils.getKeyguardStoredPasswordQuality() !=
 168                 DevicePolicyManager.PASSWORD_QUALITY_SOMETHING) {
 169             PreferenceGroup securityCategory = (PreferenceGroup)
 170                     root.findPreference(KEY_SECURITY_CATEGORY);
 171             if (securityCategory != null && mVisiblePattern != null) {
 172                 securityCategory.removePreference(root.findPreference(KEY_VISIBLE_PATTERN));
 173             }
 174         }
 175
 176         // tactile feedback. Should be common to all unlock preference screens.
 177         mTactileFeedback = (CheckBoxPreference) root.findPreference(KEY_TACTILE_FEEDBACK_ENABLED);
 178         if (!((Vibrator) getSystemService(Context.VIBRATOR_SERVICE)).hasVibrator()) {
 179             PreferenceGroup securityCategory = (PreferenceGroup)
 180                     root.findPreference(KEY_SECURITY_CATEGORY);
 181             if (securityCategory != null && mTactileFeedback != null) {
 182                 securityCategory.removePreference(mTactileFeedback);
 183             }
 184         }
 185
 186         // Append the rest of the settings
 187         addPreferencesFromResource(R.xml.security_settings_misc);
 188
 189         // Do not display SIM lock for CDMA phone
 190         TelephonyManager tm = TelephonyManager.getDefault();
 191         if ((TelephonyManager.PHONE_TYPE_CDMA == tm.getCurrentPhoneType()) &&
 192                 (tm.getLteOnCdmaMode() != Phone.LTE_ON_CDMA_TRUE)) {
 193             root.removePreference(root.findPreference(KEY_SIM_LOCK));
 194         } else {
 195             // Disable SIM lock if sim card is missing or unknown
 196             if ((TelephonyManager.getDefault().getSimState() ==
 197                                  TelephonyManager.SIM_STATE_ABSENT) ||
 198                 (TelephonyManager.getDefault().getSimState() ==
 199                                  TelephonyManager.SIM_STATE_UNKNOWN)) {
 200                 root.findPreference(KEY_SIM_LOCK).setEnabled(false);
 201             }
 202         }
 203
 204         // Show password
 205         mShowPassword = (CheckBoxPreference) root.findPreference(KEY_SHOW_PASSWORD);
 206
 207         // Credential storage
 208         mResetCredentials = root.findPreference(KEY_RESET_CREDENTIALS);
 209
 210         mToggleAppInstallation = (CheckBoxPreference) findPreference(
 211                 KEY_TOGGLE_INSTALL_APPLICATIONS);
 212         mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());
 213
 214         return root;
 215     }
 216
 217     private boolean isNonMarketAppsAllowed() {
 218         return Settings.Secure.getInt(getContentResolver(),
 219                                       Settings.Secure.INSTALL_NON_MARKET_APPS, 0) > 0;
 220     }
 221
 222     private void setNonMarketAppsAllowed(boolean enabled) {
 223         // Change the system setting
 224         Settings.Secure.putInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS,
 225                                 enabled ? 1 : 0);
 226     }
 227
 228     private void warnAppInstallation() {
 229         // TODO: DialogFragment?
 230         mWarnInstallApps = new AlertDialog.Builder(getActivity()).setTitle(
 231                 getResources().getString(R.string.error_title))
 232                 .setIcon(com.android.internal.R.drawable.ic_dialog_alert)
 233                 .setMessage(getResources().getString(R.string.install_all_warning))
 234                 .setPositiveButton(android.R.string.yes, this)
 235                 .setNegativeButton(android.R.string.no, null)
 236                 .show();
 237     }
 238
 239     public void onClick(DialogInterface dialog, int which) {
 240         if (dialog == mWarnInstallApps && which == DialogInterface.BUTTON_POSITIVE) {
 241             setNonMarketAppsAllowed(true);
 242             mToggleAppInstallation.setChecked(true);
 243         }
 244     }
 245
 246     @Override
 247     public void onDestroy() {
 248         super.onDestroy();
 249         if (mWarnInstallApps != null) {
 250             mWarnInstallApps.dismiss();
 251         }
 252     }
 253
 254     private void setupLockAfterPreference() {
 255         // Compatible with pre-Froyo
 256         long currentTimeout = Settings.Secure.getLong(getContentResolver(),
 257                 Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, 5000);
 258         mLockAfter.setValue(String.valueOf(currentTimeout));
 259         mLockAfter.setOnPreferenceChangeListener(this);
 260         final long adminTimeout = (mDPM != null ? mDPM.getMaximumTimeToLock(null) : 0);
 261         final long displayTimeout = Math.max(0,
 262                 Settings.System.getInt(getContentResolver(), SCREEN_OFF_TIMEOUT, 0));
 263         if (adminTimeout > 0) {
 264             // This setting is a slave to display timeout when a device policy is enforced.
 265             // As such, maxLockTimeout = adminTimeout - displayTimeout.
 266             // If there isn't enough time, shows "immediately" setting.
 267             disableUnusableTimeouts(Math.max(0, adminTimeout - displayTimeout));
 268         }
 269     }
 270
 271     private void updateLockAfterPreferenceSummary() {
 272         // Update summary message with current value
 273         long currentTimeout = Settings.Secure.getLong(getContentResolver(),
 274                 Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, 5000);
 275         final CharSequence[] entries = mLockAfter.getEntries();
 276         final CharSequence[] values = mLockAfter.getEntryValues();
 277         int best = 0;
 278         for (int i = 0; i < values.length; i++) {
 279             long timeout = Long.valueOf(values[i].toString());
 280             if (currentTimeout >= timeout) {
 281                 best = i;
 282             }
 283         }
 284         mLockAfter.setSummary(getString(R.string.lock_after_timeout_summary, entries[best]));
 285     }
 286
 287     private void disableUnusableTimeouts(long maxTimeout) {
 288         final CharSequence[] entries = mLockAfter.getEntries();
 289         final CharSequence[] values = mLockAfter.getEntryValues();
 290         ArrayList<CharSequence> revisedEntries = new ArrayList<CharSequence>();
 291         ArrayList<CharSequence> revisedValues = new ArrayList<CharSequence>();
 292         for (int i = 0; i < values.length; i++) {
 293             long timeout = Long.valueOf(values[i].toString());
 294             if (timeout <= maxTimeout) {
 295                 revisedEntries.add(entries[i]);
 296                 revisedValues.add(values[i]);
 297             }
 298         }
 299         if (revisedEntries.size() != entries.length || revisedValues.size() != values.length) {
 300             mLockAfter.setEntries(
 301                     revisedEntries.toArray(new CharSequence[revisedEntries.size()]));
 302             mLockAfter.setEntryValues(
 303                     revisedValues.toArray(new CharSequence[revisedValues.size()]));
 304             final int userPreference = Integer.valueOf(mLockAfter.getValue());
 305             if (userPreference <= maxTimeout) {
 306                 mLockAfter.setValue(String.valueOf(userPreference));
 307             } else {
 308                 // There will be no highlighted selection since nothing in the list matches
 309                 // maxTimeout. The user can still select anything less than maxTimeout.
 310                 // TODO: maybe append maxTimeout to the list and mark selected.
 311             }
 312         }
 313         mLockAfter.setEnabled(revisedEntries.size() > 0);
 314     }
 315
 316     @Override
 317     public void onResume() {
 318         super.onResume();
 319
 320         // Make sure we reload the preference hierarchy since some of these settings
 321         // depend on others...
 322         createPreferenceHierarchy();
 323
 324         final LockPatternUtils lockPatternUtils = mChooseLockSettingsHelper.utils();
 325         if (mVisiblePattern != null) {
 326             mVisiblePattern.setChecked(lockPatternUtils.isVisiblePatternEnabled());
 327         }
 328         if (mTactileFeedback != null) {
 329             mTactileFeedback.setChecked(lockPatternUtils.isTactileFeedbackEnabled());
 330         }
 331         if (mPowerButtonInstantlyLocks != null) {
 332             mPowerButtonInstantlyLocks.setChecked(lockPatternUtils.getPowerButtonInstantlyLocks());
 333         }
 334
 335         mShowPassword.setChecked(Settings.System.getInt(getContentResolver(),
 336                 Settings.System.TEXT_SHOW_PASSWORD, 1) != 0);
 337
 338         KeyStore.State state = KeyStore.getInstance().state();
 339         mResetCredentials.setEnabled(state != KeyStore.State.UNINITIALIZED);
 340     }
 341
 342     @Override
 343     public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
 344         final String key = preference.getKey();
 345
 346         final LockPatternUtils lockPatternUtils = mChooseLockSettingsHelper.utils();
 347         if (KEY_UNLOCK_SET_OR_CHANGE.equals(key)) {
 348             startFragment(this, "com.android.settings.ChooseLockGeneric$ChooseLockGenericFragment",
 349                     SET_OR_CHANGE_LOCK_METHOD_REQUEST, null);
 350         } else if (KEY_BIOMETRIC_WEAK_IMPROVE_MATCHING.equals(key)) {
 351             ChooseLockSettingsHelper helper =
 352                     new ChooseLockSettingsHelper(this.getActivity(), this);
 353             if (!helper.launchConfirmationActivity(
 354                     CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST, null, null)) {
 355                 startBiometricWeakImprove(); // no password set, so no need to confirm
 356             }
 357         } else if (KEY_LOCK_ENABLED.equals(key)) {
 358             lockPatternUtils.setLockPatternEnabled(isToggled(preference));
 359         } else if (KEY_VISIBLE_PATTERN.equals(key)) {
 360             lockPatternUtils.setVisiblePatternEnabled(isToggled(preference));
 361         } else if (KEY_TACTILE_FEEDBACK_ENABLED.equals(key)) {
 362             lockPatternUtils.setTactileFeedbackEnabled(isToggled(preference));
 363         } else if (KEY_POWER_INSTANTLY_LOCKS.equals(key)) {
 364             lockPatternUtils.setPowerButtonInstantlyLocks(isToggled(preference));
 365         } else if (preference == mShowPassword) {
 366             Settings.System.putInt(getContentResolver(), Settings.System.TEXT_SHOW_PASSWORD,
 367                     mShowPassword.isChecked() ? 1 : 0);
 368         } else if (preference == mToggleAppInstallation) {
 369             if (mToggleAppInstallation.isChecked()) {
 370                 mToggleAppInstallation.setChecked(false);
 371                 warnAppInstallation();
 372             } else {
 373                 setNonMarketAppsAllowed(false);
 374             }
 375         } else {
 376             // If we didn't handle it, let preferences handle it.
 377             return super.onPreferenceTreeClick(preferenceScreen, preference);
 378         }
 379
 380         return true;
 381     }
 382
 383     private boolean isToggled(Preference pref) {
 384         return ((CheckBoxPreference) pref).isChecked();
 385     }
 386
 387     /**
 388      * see confirmPatternThenDisableAndClear
 389      */
 390     @Override
 391     public void onActivityResult(int requestCode, int resultCode, Intent data) {
 392         super.onActivityResult(requestCode, resultCode, data);
 393         if (requestCode == CONFIRM_EXISTING_FOR_BIOMETRIC_IMPROVE_REQUEST &&
 394                 resultCode == Activity.RESULT_OK) {
 395             startBiometricWeakImprove();
 396             return;
 397         }
 398         createPreferenceHierarchy();
 399     }
 400
 401     public boolean onPreferenceChange(Preference preference, Object value) {
 402         if (preference == mLockAfter) {
 403             int timeout = Integer.parseInt((String) value);
 404             try {
 405                 Settings.Secure.putInt(getContentResolver(),
 406                         Settings.Secure.LOCK_SCREEN_LOCK_AFTER_TIMEOUT, timeout);
 407             } catch (NumberFormatException e) {
 408                 Log.e("SecuritySettings", "could not persist lockAfter timeout setting", e);
 409             }
 410             updateLockAfterPreferenceSummary();
 411         }
 412         return true;
 413     }
 414
 415     public void startBiometricWeakImprove(){
 416         Intent intent = new Intent();
 417         intent.setClassName("com.android.facelock", "com.android.facelock.AddToSetup");
 418         startActivity(intent);
 419     }
 420 }