LockPatternUtils.java revision 6848dc8e3b54fb27047836d8026c4c9971754607
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 17package com.android.internal.widget; 18 19import android.Manifest; 20import android.app.ActivityManagerNative; 21import android.app.AlarmManager; 22import android.app.admin.DevicePolicyManager; 23import android.app.trust.TrustManager; 24import android.appwidget.AppWidgetManager; 25import android.content.ComponentName; 26import android.content.ContentResolver; 27import android.content.Context; 28import android.content.Intent; 29import android.content.pm.PackageManager; 30import android.content.pm.UserInfo; 31import android.os.AsyncTask; 32import android.os.IBinder; 33import android.os.RemoteException; 34import android.os.ServiceManager; 35import android.os.SystemClock; 36import android.os.SystemProperties; 37import android.os.UserHandle; 38import android.os.UserManager; 39import android.os.storage.IMountService; 40import android.os.storage.StorageManager; 41import android.provider.Settings; 42import android.telecom.TelecomManager; 43import android.text.TextUtils; 44import android.util.Log; 45import android.view.IWindowManager; 46import android.view.View; 47import android.widget.Button; 48 49import com.android.internal.R; 50import com.google.android.collect.Lists; 51 52import java.security.MessageDigest; 53import java.security.NoSuchAlgorithmException; 54import java.security.SecureRandom; 55import java.util.ArrayList; 56import java.util.Collection; 57import java.util.List; 58 59/** 60 * Utilities for the lock pattern and its settings. 61 */ 62public class LockPatternUtils { 63 64 private static final String TAG = "LockPatternUtils"; 65 private static final boolean DEBUG = false; 66 67 /** 68 * The maximum number of incorrect attempts before the user is prevented 69 * from trying again for {@link #FAILED_ATTEMPT_TIMEOUT_MS}. 70 */ 71 public static final int FAILED_ATTEMPTS_BEFORE_TIMEOUT = 5; 72 73 /** 74 * The number of incorrect attempts before which we fall back on an alternative 75 * method of verifying the user, and resetting their lock pattern. 76 */ 77 public static final int FAILED_ATTEMPTS_BEFORE_RESET = 20; 78 79 /** 80 * How long the user is prevented from trying again after entering the 81 * wrong pattern too many times. 82 */ 83 public static final long FAILED_ATTEMPT_TIMEOUT_MS = 30000L; 84 85 /** 86 * The interval of the countdown for showing progress of the lockout. 87 */ 88 public static final long FAILED_ATTEMPT_COUNTDOWN_INTERVAL_MS = 1000L; 89 90 91 /** 92 * This dictates when we start telling the user that continued failed attempts will wipe 93 * their device. 94 */ 95 public static final int FAILED_ATTEMPTS_BEFORE_WIPE_GRACE = 5; 96 97 /** 98 * The minimum number of dots in a valid pattern. 99 */ 100 public static final int MIN_LOCK_PATTERN_SIZE = 4; 101 102 /** 103 * The minimum number of dots the user must include in a wrong pattern 104 * attempt for it to be counted against the counts that affect 105 * {@link #FAILED_ATTEMPTS_BEFORE_TIMEOUT} and {@link #FAILED_ATTEMPTS_BEFORE_RESET} 106 */ 107 public static final int MIN_PATTERN_REGISTER_FAIL = MIN_LOCK_PATTERN_SIZE; 108 109 /** 110 * Tells the keyguard to show the user switcher when the keyguard is created. 111 */ 112 public static final String KEYGUARD_SHOW_USER_SWITCHER = "showuserswitcher"; 113 114 /** 115 * Tells the keyguard to show the security challenge when the keyguard is created. 116 */ 117 public static final String KEYGUARD_SHOW_SECURITY_CHALLENGE = "showsecuritychallenge"; 118 119 /** 120 * Tells the keyguard to show the widget with the specified id when the keyguard is created. 121 */ 122 public static final String KEYGUARD_SHOW_APPWIDGET = "showappwidget"; 123 124 /** 125 * The bit in LOCK_BIOMETRIC_WEAK_FLAGS to be used to indicate whether liveliness should 126 * be used 127 */ 128 public static final int FLAG_BIOMETRIC_WEAK_LIVELINESS = 0x1; 129 130 /** 131 * Pseudo-appwidget id we use to represent the default clock status widget 132 */ 133 public static final int ID_DEFAULT_STATUS_WIDGET = -2; 134 135 public final static String LOCKOUT_PERMANENT_KEY = "lockscreen.lockedoutpermanently"; 136 public final static String LOCKOUT_ATTEMPT_DEADLINE = "lockscreen.lockoutattemptdeadline"; 137 public final static String PATTERN_EVER_CHOSEN_KEY = "lockscreen.patterneverchosen"; 138 public final static String PASSWORD_TYPE_KEY = "lockscreen.password_type"; 139 public static final String PASSWORD_TYPE_ALTERNATE_KEY = "lockscreen.password_type_alternate"; 140 public final static String LOCK_PASSWORD_SALT_KEY = "lockscreen.password_salt"; 141 public final static String DISABLE_LOCKSCREEN_KEY = "lockscreen.disabled"; 142 public final static String LOCKSCREEN_OPTIONS = "lockscreen.options"; 143 public final static String LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK 144 = "lockscreen.biometric_weak_fallback"; 145 public final static String BIOMETRIC_WEAK_EVER_CHOSEN_KEY 146 = "lockscreen.biometricweakeverchosen"; 147 public final static String LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS 148 = "lockscreen.power_button_instantly_locks"; 149 public final static String LOCKSCREEN_WIDGETS_ENABLED = "lockscreen.widgets_enabled"; 150 151 public final static String PASSWORD_HISTORY_KEY = "lockscreen.passwordhistory"; 152 153 private static final String LOCK_SCREEN_OWNER_INFO = Settings.Secure.LOCK_SCREEN_OWNER_INFO; 154 private static final String LOCK_SCREEN_OWNER_INFO_ENABLED = 155 Settings.Secure.LOCK_SCREEN_OWNER_INFO_ENABLED; 156 157 private static final String ENABLED_TRUST_AGENTS = "lockscreen.enabledtrustagents"; 158 159 // Maximum allowed number of repeated or ordered characters in a sequence before we'll 160 // consider it a complex PIN/password. 161 public static final int MAX_ALLOWED_SEQUENCE = 3; 162 163 private final Context mContext; 164 private final ContentResolver mContentResolver; 165 private DevicePolicyManager mDevicePolicyManager; 166 private ILockSettings mLockSettingsService; 167 168 private final boolean mMultiUserMode; 169 170 // The current user is set by KeyguardViewMediator and shared by all LockPatternUtils. 171 private static volatile int sCurrentUserId = UserHandle.USER_NULL; 172 173 public DevicePolicyManager getDevicePolicyManager() { 174 if (mDevicePolicyManager == null) { 175 mDevicePolicyManager = 176 (DevicePolicyManager)mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 177 if (mDevicePolicyManager == null) { 178 Log.e(TAG, "Can't get DevicePolicyManagerService: is it running?", 179 new IllegalStateException("Stack trace:")); 180 } 181 } 182 return mDevicePolicyManager; 183 } 184 185 private TrustManager getTrustManager() { 186 TrustManager trust = (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE); 187 if (trust == null) { 188 Log.e(TAG, "Can't get TrustManagerService: is it running?", 189 new IllegalStateException("Stack trace:")); 190 } 191 return trust; 192 } 193 194 /** 195 * @param contentResolver Used to look up and save settings. 196 */ 197 public LockPatternUtils(Context context) { 198 mContext = context; 199 mContentResolver = context.getContentResolver(); 200 201 // If this is being called by the system or by an application like keyguard that 202 // has permision INTERACT_ACROSS_USERS, then LockPatternUtils will operate in multi-user 203 // mode where calls are for the current user rather than the user of the calling process. 204 mMultiUserMode = context.checkCallingOrSelfPermission( 205 Manifest.permission.INTERACT_ACROSS_USERS_FULL) == PackageManager.PERMISSION_GRANTED; 206 } 207 208 private ILockSettings getLockSettings() { 209 if (mLockSettingsService == null) { 210 mLockSettingsService = LockPatternUtilsCache.getInstance( 211 ILockSettings.Stub.asInterface(ServiceManager.getService("lock_settings"))); 212 } 213 return mLockSettingsService; 214 } 215 216 public int getRequestedMinimumPasswordLength() { 217 return getDevicePolicyManager().getPasswordMinimumLength(null, getCurrentOrCallingUserId()); 218 } 219 220 /** 221 * Gets the device policy password mode. If the mode is non-specific, returns 222 * MODE_PATTERN which allows the user to choose anything. 223 */ 224 public int getRequestedPasswordQuality() { 225 return getDevicePolicyManager().getPasswordQuality(null, getCurrentOrCallingUserId()); 226 } 227 228 public int getRequestedPasswordHistoryLength() { 229 return getDevicePolicyManager().getPasswordHistoryLength(null, getCurrentOrCallingUserId()); 230 } 231 232 public int getRequestedPasswordMinimumLetters() { 233 return getDevicePolicyManager().getPasswordMinimumLetters(null, 234 getCurrentOrCallingUserId()); 235 } 236 237 public int getRequestedPasswordMinimumUpperCase() { 238 return getDevicePolicyManager().getPasswordMinimumUpperCase(null, 239 getCurrentOrCallingUserId()); 240 } 241 242 public int getRequestedPasswordMinimumLowerCase() { 243 return getDevicePolicyManager().getPasswordMinimumLowerCase(null, 244 getCurrentOrCallingUserId()); 245 } 246 247 public int getRequestedPasswordMinimumNumeric() { 248 return getDevicePolicyManager().getPasswordMinimumNumeric(null, 249 getCurrentOrCallingUserId()); 250 } 251 252 public int getRequestedPasswordMinimumSymbols() { 253 return getDevicePolicyManager().getPasswordMinimumSymbols(null, 254 getCurrentOrCallingUserId()); 255 } 256 257 public int getRequestedPasswordMinimumNonLetter() { 258 return getDevicePolicyManager().getPasswordMinimumNonLetter(null, 259 getCurrentOrCallingUserId()); 260 } 261 262 public void reportFailedPasswordAttempt() { 263 int userId = getCurrentOrCallingUserId(); 264 getDevicePolicyManager().reportFailedPasswordAttempt(userId); 265 getTrustManager().reportUnlockAttempt(false /* authenticated */, userId); 266 getTrustManager().reportRequireCredentialEntry(userId); 267 } 268 269 public void reportSuccessfulPasswordAttempt() { 270 getDevicePolicyManager().reportSuccessfulPasswordAttempt(getCurrentOrCallingUserId()); 271 getTrustManager().reportUnlockAttempt(true /* authenticated */, 272 getCurrentOrCallingUserId()); 273 } 274 275 public void setCurrentUser(int userId) { 276 sCurrentUserId = userId; 277 } 278 279 public int getCurrentUser() { 280 if (sCurrentUserId != UserHandle.USER_NULL) { 281 // Someone is regularly updating using setCurrentUser() use that value. 282 return sCurrentUserId; 283 } 284 try { 285 return ActivityManagerNative.getDefault().getCurrentUser().id; 286 } catch (RemoteException re) { 287 return UserHandle.USER_OWNER; 288 } 289 } 290 291 public void removeUser(int userId) { 292 try { 293 getLockSettings().removeUser(userId); 294 } catch (RemoteException re) { 295 Log.e(TAG, "Couldn't remove lock settings for user " + userId); 296 } 297 } 298 299 private int getCurrentOrCallingUserId() { 300 if (mMultiUserMode) { 301 // TODO: This is a little inefficient. See if all users of this are able to 302 // handle USER_CURRENT and pass that instead. 303 return getCurrentUser(); 304 } else { 305 return UserHandle.getCallingUserId(); 306 } 307 } 308 309 /** 310 * Check to see if a pattern matches the saved pattern. If no pattern exists, 311 * always returns true. 312 * @param pattern The pattern to check. 313 * @return Whether the pattern matches the stored one. 314 */ 315 public boolean checkPattern(List<LockPatternView.Cell> pattern) { 316 final int userId = getCurrentOrCallingUserId(); 317 try { 318 return getLockSettings().checkPattern(patternToString(pattern), userId); 319 } catch (RemoteException re) { 320 return true; 321 } 322 } 323 324 /** 325 * Check to see if a password matches the saved password. If no password exists, 326 * always returns true. 327 * @param password The password to check. 328 * @return Whether the password matches the stored one. 329 */ 330 public boolean checkPassword(String password) { 331 final int userId = getCurrentOrCallingUserId(); 332 try { 333 return getLockSettings().checkPassword(password, userId); 334 } catch (RemoteException re) { 335 return true; 336 } 337 } 338 339 /** 340 * Check to see if vold already has the password. 341 * Note that this also clears vold's copy of the password. 342 * @return Whether the vold password matches or not. 343 */ 344 public boolean checkVoldPassword() { 345 final int userId = getCurrentOrCallingUserId(); 346 try { 347 return getLockSettings().checkVoldPassword(userId); 348 } catch (RemoteException re) { 349 return false; 350 } 351 } 352 353 /** 354 * Check to see if a password matches any of the passwords stored in the 355 * password history. 356 * 357 * @param password The password to check. 358 * @return Whether the password matches any in the history. 359 */ 360 public boolean checkPasswordHistory(String password) { 361 String passwordHashString = new String( 362 passwordToHash(password, getCurrentOrCallingUserId())); 363 String passwordHistory = getString(PASSWORD_HISTORY_KEY); 364 if (passwordHistory == null) { 365 return false; 366 } 367 // Password History may be too long... 368 int passwordHashLength = passwordHashString.length(); 369 int passwordHistoryLength = getRequestedPasswordHistoryLength(); 370 if(passwordHistoryLength == 0) { 371 return false; 372 } 373 int neededPasswordHistoryLength = passwordHashLength * passwordHistoryLength 374 + passwordHistoryLength - 1; 375 if (passwordHistory.length() > neededPasswordHistoryLength) { 376 passwordHistory = passwordHistory.substring(0, neededPasswordHistoryLength); 377 } 378 return passwordHistory.contains(passwordHashString); 379 } 380 381 /** 382 * Check to see if the user has stored a lock pattern. 383 * @return Whether a saved pattern exists. 384 */ 385 public boolean savedPatternExists() { 386 try { 387 return getLockSettings().havePattern(getCurrentOrCallingUserId()); 388 } catch (RemoteException re) { 389 return false; 390 } 391 } 392 393 /** 394 * Check to see if the user has stored a lock pattern. 395 * @return Whether a saved pattern exists. 396 */ 397 public boolean savedPasswordExists() { 398 try { 399 return getLockSettings().havePassword(getCurrentOrCallingUserId()); 400 } catch (RemoteException re) { 401 return false; 402 } 403 } 404 405 /** 406 * Return true if the user has ever chosen a pattern. This is true even if the pattern is 407 * currently cleared. 408 * 409 * @return True if the user has ever chosen a pattern. 410 */ 411 public boolean isPatternEverChosen() { 412 return getBoolean(PATTERN_EVER_CHOSEN_KEY, false); 413 } 414 415 /** 416 * Return true if the user has ever chosen biometric weak. This is true even if biometric 417 * weak is not current set. 418 * 419 * @return True if the user has ever chosen biometric weak. 420 */ 421 public boolean isBiometricWeakEverChosen() { 422 return getBoolean(BIOMETRIC_WEAK_EVER_CHOSEN_KEY, false); 423 } 424 425 /** 426 * Used by device policy manager to validate the current password 427 * information it has. 428 */ 429 public int getActivePasswordQuality() { 430 int activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED; 431 // Note we don't want to use getKeyguardStoredPasswordQuality() because we want this to 432 // return biometric_weak if that is being used instead of the backup 433 int quality = 434 (int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 435 switch (quality) { 436 case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING: 437 if (isLockPatternEnabled()) { 438 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 439 } 440 break; 441 case DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK: 442 if (isBiometricWeakInstalled()) { 443 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK; 444 } 445 break; 446 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC: 447 if (isLockPasswordEnabled()) { 448 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_NUMERIC; 449 } 450 break; 451 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX: 452 if (isLockPasswordEnabled()) { 453 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX; 454 } 455 break; 456 case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC: 457 if (isLockPasswordEnabled()) { 458 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC; 459 } 460 break; 461 case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC: 462 if (isLockPasswordEnabled()) { 463 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC; 464 } 465 break; 466 case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX: 467 if (isLockPasswordEnabled()) { 468 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 469 } 470 break; 471 } 472 473 return activePasswordQuality; 474 } 475 476 /** 477 * Clear any lock pattern or password. 478 */ 479 public void clearLock(boolean isFallback) { 480 if(!isFallback) deleteGallery(); 481 saveLockPassword(null, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 482 setLockPatternEnabled(false); 483 saveLockPattern(null); 484 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 485 setLong(PASSWORD_TYPE_ALTERNATE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 486 onAfterChangingPassword(); 487 } 488 489 /** 490 * Disable showing lock screen at all when the DevicePolicyManager allows it. 491 * This is only meaningful if pattern, pin or password are not set. 492 * 493 * @param disable Disables lock screen when true 494 */ 495 public void setLockScreenDisabled(boolean disable) { 496 setLong(DISABLE_LOCKSCREEN_KEY, disable ? 1 : 0); 497 } 498 499 /** 500 * Determine if LockScreen can be disabled. This is used, for example, to tell if we should 501 * show LockScreen or go straight to the home screen. 502 * 503 * @return true if lock screen is can be disabled 504 */ 505 public boolean isLockScreenDisabled() { 506 if (!isSecure() && getLong(DISABLE_LOCKSCREEN_KEY, 0) != 0) { 507 // Check if the number of switchable users forces the lockscreen. 508 final List<UserInfo> users = UserManager.get(mContext).getUsers(true); 509 final int userCount = users.size(); 510 int switchableUsers = 0; 511 for (int i = 0; i < userCount; i++) { 512 if (users.get(i).supportsSwitchTo()) { 513 switchableUsers++; 514 } 515 } 516 return switchableUsers < 2; 517 } 518 return false; 519 } 520 521 /** 522 * Calls back SetupFaceLock to delete the temporary gallery file 523 */ 524 public void deleteTempGallery() { 525 Intent intent = new Intent().setAction("com.android.facelock.DELETE_GALLERY"); 526 intent.putExtra("deleteTempGallery", true); 527 mContext.sendBroadcast(intent); 528 } 529 530 /** 531 * Calls back SetupFaceLock to delete the gallery file when the lock type is changed 532 */ 533 void deleteGallery() { 534 if(usingBiometricWeak()) { 535 Intent intent = new Intent().setAction("com.android.facelock.DELETE_GALLERY"); 536 intent.putExtra("deleteGallery", true); 537 mContext.sendBroadcast(intent); 538 } 539 } 540 541 /** 542 * Save a lock pattern. 543 * @param pattern The new pattern to save. 544 */ 545 public void saveLockPattern(List<LockPatternView.Cell> pattern) { 546 this.saveLockPattern(pattern, false); 547 } 548 549 /** 550 * Save a lock pattern. 551 * @param pattern The new pattern to save. 552 * @param isFallback Specifies if this is a fallback to biometric weak 553 */ 554 public void saveLockPattern(List<LockPatternView.Cell> pattern, boolean isFallback) { 555 try { 556 int userId = getCurrentOrCallingUserId(); 557 getLockSettings().setLockPattern(patternToString(pattern), userId); 558 DevicePolicyManager dpm = getDevicePolicyManager(); 559 if (pattern != null) { 560 // Update the device encryption password. 561 if (userId == UserHandle.USER_OWNER 562 && LockPatternUtils.isDeviceEncryptionEnabled()) { 563 final ContentResolver cr = mContext.getContentResolver(); 564 final boolean required = Settings.Global.getInt(cr, 565 Settings.Global.REQUIRE_PASSWORD_TO_DECRYPT, 1) == 1 ? true : false; 566 if (!required) { 567 clearEncryptionPassword(); 568 } else { 569 String stringPattern = patternToString(pattern); 570 updateEncryptionPassword(StorageManager.CRYPT_TYPE_PATTERN, stringPattern); 571 } 572 } 573 574 setBoolean(PATTERN_EVER_CHOSEN_KEY, true); 575 if (!isFallback) { 576 deleteGallery(); 577 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 578 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_SOMETHING, 579 pattern.size(), 0, 0, 0, 0, 0, 0, userId); 580 } else { 581 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK); 582 setLong(PASSWORD_TYPE_ALTERNATE_KEY, 583 DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 584 finishBiometricWeak(); 585 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 586 0, 0, 0, 0, 0, 0, 0, userId); 587 } 588 } else { 589 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 0, 0, 590 0, 0, 0, 0, 0, userId); 591 } 592 onAfterChangingPassword(); 593 } catch (RemoteException re) { 594 Log.e(TAG, "Couldn't save lock pattern " + re); 595 } 596 } 597 598 private void updateCryptoUserInfo() { 599 int userId = getCurrentOrCallingUserId(); 600 if (userId != UserHandle.USER_OWNER) { 601 return; 602 } 603 604 final String ownerInfo = isOwnerInfoEnabled() ? getOwnerInfo(userId) : ""; 605 606 IBinder service = ServiceManager.getService("mount"); 607 if (service == null) { 608 Log.e(TAG, "Could not find the mount service to update the user info"); 609 return; 610 } 611 612 IMountService mountService = IMountService.Stub.asInterface(service); 613 try { 614 Log.d(TAG, "Setting owner info"); 615 mountService.setField(StorageManager.OWNER_INFO_KEY, ownerInfo); 616 } catch (RemoteException e) { 617 Log.e(TAG, "Error changing user info", e); 618 } 619 } 620 621 public void setOwnerInfo(String info, int userId) { 622 setString(LOCK_SCREEN_OWNER_INFO, info, userId); 623 updateCryptoUserInfo(); 624 } 625 626 public void setOwnerInfoEnabled(boolean enabled) { 627 setBoolean(LOCK_SCREEN_OWNER_INFO_ENABLED, enabled); 628 updateCryptoUserInfo(); 629 } 630 631 public String getOwnerInfo(int userId) { 632 return getString(LOCK_SCREEN_OWNER_INFO); 633 } 634 635 public boolean isOwnerInfoEnabled() { 636 return getBoolean(LOCK_SCREEN_OWNER_INFO_ENABLED, false); 637 } 638 639 /** 640 * Compute the password quality from the given password string. 641 */ 642 static public int computePasswordQuality(String password) { 643 boolean hasDigit = false; 644 boolean hasNonDigit = false; 645 final int len = password.length(); 646 for (int i = 0; i < len; i++) { 647 if (Character.isDigit(password.charAt(i))) { 648 hasDigit = true; 649 } else { 650 hasNonDigit = true; 651 } 652 } 653 654 if (hasNonDigit && hasDigit) { 655 return DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC; 656 } 657 if (hasNonDigit) { 658 return DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC; 659 } 660 if (hasDigit) { 661 return maxLengthSequence(password) > MAX_ALLOWED_SEQUENCE 662 ? DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 663 : DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX; 664 } 665 return DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED; 666 } 667 668 private static int categoryChar(char c) { 669 if ('a' <= c && c <= 'z') return 0; 670 if ('A' <= c && c <= 'Z') return 1; 671 if ('0' <= c && c <= '9') return 2; 672 return 3; 673 } 674 675 private static int maxDiffCategory(int category) { 676 if (category == 0 || category == 1) return 1; 677 else if (category == 2) return 10; 678 return 0; 679 } 680 681 /* 682 * Returns the maximum length of a sequential characters. A sequence is defined as 683 * monotonically increasing characters with a constant interval or the same character repeated. 684 * 685 * For example: 686 * maxLengthSequence("1234") == 4 687 * maxLengthSequence("1234abc") == 4 688 * maxLengthSequence("aabc") == 3 689 * maxLengthSequence("qwertyuio") == 1 690 * maxLengthSequence("@ABC") == 3 691 * maxLengthSequence(";;;;") == 4 (anything that repeats) 692 * maxLengthSequence(":;<=>") == 1 (ordered, but not composed of alphas or digits) 693 * 694 * @param string the pass 695 * @return the number of sequential letters or digits 696 */ 697 public static int maxLengthSequence(String string) { 698 if (string.length() == 0) return 0; 699 char previousChar = string.charAt(0); 700 int category = categoryChar(previousChar); //current category of the sequence 701 int diff = 0; //difference between two consecutive characters 702 boolean hasDiff = false; //if we are currently targeting a sequence 703 int maxLength = 0; //maximum length of a sequence already found 704 int startSequence = 0; //where the current sequence started 705 for (int current = 1; current < string.length(); current++) { 706 char currentChar = string.charAt(current); 707 int categoryCurrent = categoryChar(currentChar); 708 int currentDiff = (int) currentChar - (int) previousChar; 709 if (categoryCurrent != category || Math.abs(currentDiff) > maxDiffCategory(category)) { 710 maxLength = Math.max(maxLength, current - startSequence); 711 startSequence = current; 712 hasDiff = false; 713 category = categoryCurrent; 714 } 715 else { 716 if(hasDiff && currentDiff != diff) { 717 maxLength = Math.max(maxLength, current - startSequence); 718 startSequence = current - 1; 719 } 720 diff = currentDiff; 721 hasDiff = true; 722 } 723 previousChar = currentChar; 724 } 725 maxLength = Math.max(maxLength, string.length() - startSequence); 726 return maxLength; 727 } 728 729 /** Update the encryption password if it is enabled **/ 730 private void updateEncryptionPassword(final int type, final String password) { 731 DevicePolicyManager dpm = getDevicePolicyManager(); 732 if (dpm.getStorageEncryptionStatus(getCurrentOrCallingUserId()) 733 != DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE) { 734 return; 735 } 736 737 final IBinder service = ServiceManager.getService("mount"); 738 if (service == null) { 739 Log.e(TAG, "Could not find the mount service to update the encryption password"); 740 return; 741 } 742 743 new AsyncTask<Void, Void, Void>() { 744 @Override 745 protected Void doInBackground(Void... dummy) { 746 IMountService mountService = IMountService.Stub.asInterface(service); 747 try { 748 mountService.changeEncryptionPassword(type, password); 749 } catch (RemoteException e) { 750 Log.e(TAG, "Error changing encryption password", e); 751 } 752 return null; 753 } 754 }.execute(); 755 } 756 757 /** 758 * Save a lock password. Does not ensure that the password is as good 759 * as the requested mode, but will adjust the mode to be as good as the 760 * pattern. 761 * @param password The password to save 762 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 763 */ 764 public void saveLockPassword(String password, int quality) { 765 this.saveLockPassword(password, quality, false, getCurrentOrCallingUserId()); 766 } 767 768 /** 769 * Save a lock password. Does not ensure that the password is as good 770 * as the requested mode, but will adjust the mode to be as good as the 771 * pattern. 772 * @param password The password to save 773 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 774 * @param isFallback Specifies if this is a fallback to biometric weak 775 */ 776 public void saveLockPassword(String password, int quality, boolean isFallback) { 777 saveLockPassword(password, quality, isFallback, getCurrentOrCallingUserId()); 778 } 779 780 /** 781 * Save a lock password. Does not ensure that the password is as good 782 * as the requested mode, but will adjust the mode to be as good as the 783 * pattern. 784 * @param password The password to save 785 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 786 * @param isFallback Specifies if this is a fallback to biometric weak 787 * @param userHandle The userId of the user to change the password for 788 */ 789 public void saveLockPassword(String password, int quality, boolean isFallback, int userHandle) { 790 try { 791 DevicePolicyManager dpm = getDevicePolicyManager(); 792 if (!TextUtils.isEmpty(password)) { 793 getLockSettings().setLockPassword(password, userHandle); 794 int computedQuality = computePasswordQuality(password); 795 796 // Update the device encryption password. 797 if (userHandle == UserHandle.USER_OWNER 798 && LockPatternUtils.isDeviceEncryptionEnabled()) { 799 final ContentResolver cr = mContext.getContentResolver(); 800 final boolean required = Settings.Global.getInt(cr, 801 Settings.Global.REQUIRE_PASSWORD_TO_DECRYPT, 1) == 1 ? true : false; 802 if (!required) { 803 clearEncryptionPassword(); 804 } else { 805 boolean numeric = computedQuality 806 == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC; 807 boolean numericComplex = computedQuality 808 == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX; 809 int type = numeric || numericComplex ? StorageManager.CRYPT_TYPE_PIN 810 : StorageManager.CRYPT_TYPE_PASSWORD; 811 updateEncryptionPassword(type, password); 812 } 813 } 814 815 if (!isFallback) { 816 deleteGallery(); 817 setLong(PASSWORD_TYPE_KEY, Math.max(quality, computedQuality), userHandle); 818 if (computedQuality != DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) { 819 int letters = 0; 820 int uppercase = 0; 821 int lowercase = 0; 822 int numbers = 0; 823 int symbols = 0; 824 int nonletter = 0; 825 for (int i = 0; i < password.length(); i++) { 826 char c = password.charAt(i); 827 if (c >= 'A' && c <= 'Z') { 828 letters++; 829 uppercase++; 830 } else if (c >= 'a' && c <= 'z') { 831 letters++; 832 lowercase++; 833 } else if (c >= '0' && c <= '9') { 834 numbers++; 835 nonletter++; 836 } else { 837 symbols++; 838 nonletter++; 839 } 840 } 841 dpm.setActivePasswordState(Math.max(quality, computedQuality), 842 password.length(), letters, uppercase, lowercase, 843 numbers, symbols, nonletter, userHandle); 844 } else { 845 // The password is not anything. 846 dpm.setActivePasswordState( 847 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 848 0, 0, 0, 0, 0, 0, 0, userHandle); 849 } 850 } else { 851 // Case where it's a fallback for biometric weak 852 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 853 userHandle); 854 setLong(PASSWORD_TYPE_ALTERNATE_KEY, Math.max(quality, computedQuality), 855 userHandle); 856 finishBiometricWeak(); 857 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 858 0, 0, 0, 0, 0, 0, 0, userHandle); 859 } 860 // Add the password to the password history. We assume all 861 // password hashes have the same length for simplicity of implementation. 862 String passwordHistory = getString(PASSWORD_HISTORY_KEY, userHandle); 863 if (passwordHistory == null) { 864 passwordHistory = new String(); 865 } 866 int passwordHistoryLength = getRequestedPasswordHistoryLength(); 867 if (passwordHistoryLength == 0) { 868 passwordHistory = ""; 869 } else { 870 byte[] hash = passwordToHash(password, userHandle); 871 passwordHistory = new String(hash) + "," + passwordHistory; 872 // Cut it to contain passwordHistoryLength hashes 873 // and passwordHistoryLength -1 commas. 874 passwordHistory = passwordHistory.substring(0, Math.min(hash.length 875 * passwordHistoryLength + passwordHistoryLength - 1, passwordHistory 876 .length())); 877 } 878 setString(PASSWORD_HISTORY_KEY, passwordHistory, userHandle); 879 } else { 880 // Empty password 881 getLockSettings().setLockPassword(null, userHandle); 882 if (userHandle == UserHandle.USER_OWNER) { 883 // Set the encryption password to default. 884 updateEncryptionPassword(StorageManager.CRYPT_TYPE_DEFAULT, null); 885 } 886 887 dpm.setActivePasswordState( 888 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 0, 0, 0, 0, 0, 0, 0, 889 userHandle); 890 } 891 onAfterChangingPassword(); 892 } catch (RemoteException re) { 893 // Cant do much 894 Log.e(TAG, "Unable to save lock password " + re); 895 } 896 } 897 898 /** 899 * Gets whether the device is encrypted. 900 * 901 * @return Whether the device is encrypted. 902 */ 903 public static boolean isDeviceEncrypted() { 904 IMountService mountService = IMountService.Stub.asInterface( 905 ServiceManager.getService("mount")); 906 try { 907 return mountService.getEncryptionState() != IMountService.ENCRYPTION_STATE_NONE 908 && mountService.getPasswordType() != StorageManager.CRYPT_TYPE_DEFAULT; 909 } catch (RemoteException re) { 910 Log.e(TAG, "Error getting encryption state", re); 911 } 912 return true; 913 } 914 915 /** 916 * Determine if the device supports encryption, even if it's set to default. This 917 * differs from isDeviceEncrypted() in that it returns true even if the device is 918 * encrypted with the default password. 919 * @return true if device encryption is enabled 920 */ 921 public static boolean isDeviceEncryptionEnabled() { 922 final String status = SystemProperties.get("ro.crypto.state", "unsupported"); 923 return "encrypted".equalsIgnoreCase(status); 924 } 925 926 /** 927 * Clears the encryption password. 928 */ 929 public void clearEncryptionPassword() { 930 updateEncryptionPassword(StorageManager.CRYPT_TYPE_DEFAULT, null); 931 } 932 933 /** 934 * Retrieves the quality mode we're in. 935 * {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 936 * 937 * @return stored password quality 938 */ 939 public int getKeyguardStoredPasswordQuality() { 940 return getKeyguardStoredPasswordQuality(getCurrentOrCallingUserId()); 941 } 942 943 /** 944 * Retrieves the quality mode for {@param userHandle}. 945 * {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 946 * 947 * @return stored password quality 948 */ 949 public int getKeyguardStoredPasswordQuality(int userHandle) { 950 int quality = (int) getLong(PASSWORD_TYPE_KEY, 951 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userHandle); 952 // If the user has chosen to use weak biometric sensor, then return the backup locking 953 // method and treat biometric as a special case. 954 if (quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) { 955 quality = (int) getLong(PASSWORD_TYPE_ALTERNATE_KEY, 956 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userHandle); 957 } 958 return quality; 959 } 960 961 /** 962 * @return true if the lockscreen method is set to biometric weak 963 */ 964 public boolean usingBiometricWeak() { 965 int quality = 966 (int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 967 return quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK; 968 } 969 970 /** 971 * Deserialize a pattern. 972 * @param string The pattern serialized with {@link #patternToString} 973 * @return The pattern. 974 */ 975 public static List<LockPatternView.Cell> stringToPattern(String string) { 976 List<LockPatternView.Cell> result = Lists.newArrayList(); 977 978 final byte[] bytes = string.getBytes(); 979 for (int i = 0; i < bytes.length; i++) { 980 byte b = bytes[i]; 981 result.add(LockPatternView.Cell.of(b / 3, b % 3)); 982 } 983 return result; 984 } 985 986 /** 987 * Serialize a pattern. 988 * @param pattern The pattern. 989 * @return The pattern in string form. 990 */ 991 public static String patternToString(List<LockPatternView.Cell> pattern) { 992 if (pattern == null) { 993 return ""; 994 } 995 final int patternSize = pattern.size(); 996 997 byte[] res = new byte[patternSize]; 998 for (int i = 0; i < patternSize; i++) { 999 LockPatternView.Cell cell = pattern.get(i); 1000 res[i] = (byte) (cell.getRow() * 3 + cell.getColumn()); 1001 } 1002 return new String(res); 1003 } 1004 1005 /* 1006 * Generate an SHA-1 hash for the pattern. Not the most secure, but it is 1007 * at least a second level of protection. First level is that the file 1008 * is in a location only readable by the system process. 1009 * @param pattern the gesture pattern. 1010 * @return the hash of the pattern in a byte array. 1011 */ 1012 public static byte[] patternToHash(List<LockPatternView.Cell> pattern) { 1013 if (pattern == null) { 1014 return null; 1015 } 1016 1017 final int patternSize = pattern.size(); 1018 byte[] res = new byte[patternSize]; 1019 for (int i = 0; i < patternSize; i++) { 1020 LockPatternView.Cell cell = pattern.get(i); 1021 res[i] = (byte) (cell.getRow() * 3 + cell.getColumn()); 1022 } 1023 try { 1024 MessageDigest md = MessageDigest.getInstance("SHA-1"); 1025 byte[] hash = md.digest(res); 1026 return hash; 1027 } catch (NoSuchAlgorithmException nsa) { 1028 return res; 1029 } 1030 } 1031 1032 private String getSalt(int userId) { 1033 long salt = getLong(LOCK_PASSWORD_SALT_KEY, 0, userId); 1034 if (salt == 0) { 1035 try { 1036 salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1037 setLong(LOCK_PASSWORD_SALT_KEY, salt, userId); 1038 Log.v(TAG, "Initialized lock password salt for user: " + userId); 1039 } catch (NoSuchAlgorithmException e) { 1040 // Throw an exception rather than storing a password we'll never be able to recover 1041 throw new IllegalStateException("Couldn't get SecureRandom number", e); 1042 } 1043 } 1044 return Long.toHexString(salt); 1045 } 1046 1047 /* 1048 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1049 * Not the most secure, but it is at least a second level of protection. First level is that 1050 * the file is in a location only readable by the system process. 1051 * @param password the gesture pattern. 1052 * @return the hash of the pattern in a byte array. 1053 */ 1054 public byte[] passwordToHash(String password, int userId) { 1055 if (password == null) { 1056 return null; 1057 } 1058 String algo = null; 1059 byte[] hashed = null; 1060 try { 1061 byte[] saltedPassword = (password + getSalt(userId)).getBytes(); 1062 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1063 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1064 hashed = (toHex(sha1) + toHex(md5)).getBytes(); 1065 } catch (NoSuchAlgorithmException e) { 1066 Log.w(TAG, "Failed to encode string because of missing algorithm: " + algo); 1067 } 1068 return hashed; 1069 } 1070 1071 private static String toHex(byte[] ary) { 1072 final String hex = "0123456789ABCDEF"; 1073 String ret = ""; 1074 for (int i = 0; i < ary.length; i++) { 1075 ret += hex.charAt((ary[i] >> 4) & 0xf); 1076 ret += hex.charAt(ary[i] & 0xf); 1077 } 1078 return ret; 1079 } 1080 1081 /** 1082 * @return Whether the lock password is enabled, or if it is set as a backup for biometric weak 1083 */ 1084 public boolean isLockPasswordEnabled() { 1085 long mode = getLong(PASSWORD_TYPE_KEY, 0); 1086 long backupMode = getLong(PASSWORD_TYPE_ALTERNATE_KEY, 0); 1087 final boolean passwordEnabled = mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1088 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1089 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1090 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1091 || mode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1092 final boolean backupEnabled = backupMode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1093 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1094 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1095 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1096 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1097 1098 return savedPasswordExists() && (passwordEnabled || 1099 (usingBiometricWeak() && backupEnabled)); 1100 } 1101 1102 /** 1103 * @return Whether the lock pattern is enabled, or if it is set as a backup for biometric weak 1104 */ 1105 public boolean isLockPatternEnabled() { 1106 final boolean backupEnabled = 1107 getLong(PASSWORD_TYPE_ALTERNATE_KEY, 1108 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) 1109 == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 1110 1111 return getBoolean(Settings.Secure.LOCK_PATTERN_ENABLED, false) 1112 && (getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) 1113 == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING || 1114 (usingBiometricWeak() && backupEnabled)); 1115 } 1116 1117 /** 1118 * @return Whether biometric weak lock is installed and that the front facing camera exists 1119 */ 1120 public boolean isBiometricWeakInstalled() { 1121 // Check that it's installed 1122 PackageManager pm = mContext.getPackageManager(); 1123 try { 1124 pm.getPackageInfo("com.android.facelock", PackageManager.GET_ACTIVITIES); 1125 } catch (PackageManager.NameNotFoundException e) { 1126 return false; 1127 } 1128 1129 // Check that the camera is enabled 1130 if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)) { 1131 return false; 1132 } 1133 if (getDevicePolicyManager().getCameraDisabled(null, getCurrentOrCallingUserId())) { 1134 return false; 1135 } 1136 1137 // TODO: If we decide not to proceed with Face Unlock as a trustlet, this must be changed 1138 // back to returning true. If we become certain that Face Unlock will be a trustlet, this 1139 // entire function and a lot of other code can be removed. 1140 if (DEBUG) Log.d(TAG, "Forcing isBiometricWeakInstalled() to return false to disable it"); 1141 return false; 1142 } 1143 1144 /** 1145 * Set whether biometric weak liveliness is enabled. 1146 */ 1147 public void setBiometricWeakLivelinessEnabled(boolean enabled) { 1148 long currentFlag = getLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, 0L); 1149 long newFlag; 1150 if (enabled) { 1151 newFlag = currentFlag | FLAG_BIOMETRIC_WEAK_LIVELINESS; 1152 } else { 1153 newFlag = currentFlag & ~FLAG_BIOMETRIC_WEAK_LIVELINESS; 1154 } 1155 setLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, newFlag); 1156 } 1157 1158 /** 1159 * @return Whether the biometric weak liveliness is enabled. 1160 */ 1161 public boolean isBiometricWeakLivelinessEnabled() { 1162 long currentFlag = getLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, 0L); 1163 return ((currentFlag & FLAG_BIOMETRIC_WEAK_LIVELINESS) != 0); 1164 } 1165 1166 /** 1167 * Set whether the lock pattern is enabled. 1168 */ 1169 public void setLockPatternEnabled(boolean enabled) { 1170 setBoolean(Settings.Secure.LOCK_PATTERN_ENABLED, enabled); 1171 } 1172 1173 /** 1174 * @return Whether the visible pattern is enabled. 1175 */ 1176 public boolean isVisiblePatternEnabled() { 1177 return getBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, false); 1178 } 1179 1180 /** 1181 * Set whether the visible pattern is enabled. 1182 */ 1183 public void setVisiblePatternEnabled(boolean enabled) { 1184 setBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, enabled); 1185 1186 // Update for crypto if owner 1187 int userId = getCurrentOrCallingUserId(); 1188 if (userId != UserHandle.USER_OWNER) { 1189 return; 1190 } 1191 1192 IBinder service = ServiceManager.getService("mount"); 1193 if (service == null) { 1194 Log.e(TAG, "Could not find the mount service to update the user info"); 1195 return; 1196 } 1197 1198 IMountService mountService = IMountService.Stub.asInterface(service); 1199 try { 1200 mountService.setField(StorageManager.PATTERN_VISIBLE_KEY, enabled ? "1" : "0"); 1201 } catch (RemoteException e) { 1202 Log.e(TAG, "Error changing pattern visible state", e); 1203 } 1204 } 1205 1206 /** 1207 * @return Whether tactile feedback for the pattern is enabled. 1208 */ 1209 public boolean isTactileFeedbackEnabled() { 1210 return Settings.System.getIntForUser(mContentResolver, 1211 Settings.System.HAPTIC_FEEDBACK_ENABLED, 1, UserHandle.USER_CURRENT) != 0; 1212 } 1213 1214 /** 1215 * Set and store the lockout deadline, meaning the user can't attempt his/her unlock 1216 * pattern until the deadline has passed. 1217 * @return the chosen deadline. 1218 */ 1219 public long setLockoutAttemptDeadline() { 1220 final long deadline = SystemClock.elapsedRealtime() + FAILED_ATTEMPT_TIMEOUT_MS; 1221 setLong(LOCKOUT_ATTEMPT_DEADLINE, deadline); 1222 return deadline; 1223 } 1224 1225 /** 1226 * @return The elapsed time in millis in the future when the user is allowed to 1227 * attempt to enter his/her lock pattern, or 0 if the user is welcome to 1228 * enter a pattern. 1229 */ 1230 public long getLockoutAttemptDeadline() { 1231 final long deadline = getLong(LOCKOUT_ATTEMPT_DEADLINE, 0L); 1232 final long now = SystemClock.elapsedRealtime(); 1233 if (deadline < now || deadline > (now + FAILED_ATTEMPT_TIMEOUT_MS)) { 1234 return 0L; 1235 } 1236 return deadline; 1237 } 1238 1239 /** 1240 * @return Whether the user is permanently locked out until they verify their 1241 * credentials. Occurs after {@link #FAILED_ATTEMPTS_BEFORE_RESET} failed 1242 * attempts. 1243 */ 1244 public boolean isPermanentlyLocked() { 1245 return getBoolean(LOCKOUT_PERMANENT_KEY, false); 1246 } 1247 1248 /** 1249 * Set the state of whether the device is permanently locked, meaning the user 1250 * must authenticate via other means. 1251 * 1252 * @param locked Whether the user is permanently locked out until they verify their 1253 * credentials. Occurs after {@link #FAILED_ATTEMPTS_BEFORE_RESET} failed 1254 * attempts. 1255 */ 1256 public void setPermanentlyLocked(boolean locked) { 1257 setBoolean(LOCKOUT_PERMANENT_KEY, locked); 1258 } 1259 1260 public boolean isEmergencyCallCapable() { 1261 return mContext.getResources().getBoolean( 1262 com.android.internal.R.bool.config_voice_capable); 1263 } 1264 1265 public boolean isPukUnlockScreenEnable() { 1266 return mContext.getResources().getBoolean( 1267 com.android.internal.R.bool.config_enable_puk_unlock_screen); 1268 } 1269 1270 public boolean isEmergencyCallEnabledWhileSimLocked() { 1271 return mContext.getResources().getBoolean( 1272 com.android.internal.R.bool.config_enable_emergency_call_while_sim_locked); 1273 } 1274 1275 /** 1276 * @return A formatted string of the next alarm (for showing on the lock screen), 1277 * or null if there is no next alarm. 1278 */ 1279 public AlarmManager.AlarmClockInfo getNextAlarm() { 1280 AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); 1281 return alarmManager.getNextAlarmClock(UserHandle.USER_CURRENT); 1282 } 1283 1284 private boolean getBoolean(String secureSettingKey, boolean defaultValue, int userId) { 1285 try { 1286 return getLockSettings().getBoolean(secureSettingKey, defaultValue, userId); 1287 } catch (RemoteException re) { 1288 return defaultValue; 1289 } 1290 } 1291 1292 private boolean getBoolean(String secureSettingKey, boolean defaultValue) { 1293 return getBoolean(secureSettingKey, defaultValue, getCurrentOrCallingUserId()); 1294 } 1295 1296 private void setBoolean(String secureSettingKey, boolean enabled, int userId) { 1297 try { 1298 getLockSettings().setBoolean(secureSettingKey, enabled, userId); 1299 } catch (RemoteException re) { 1300 // What can we do? 1301 Log.e(TAG, "Couldn't write boolean " + secureSettingKey + re); 1302 } 1303 } 1304 1305 private void setBoolean(String secureSettingKey, boolean enabled) { 1306 setBoolean(secureSettingKey, enabled, getCurrentOrCallingUserId()); 1307 } 1308 1309 public int[] getAppWidgets() { 1310 return getAppWidgets(UserHandle.USER_CURRENT); 1311 } 1312 1313 private int[] getAppWidgets(int userId) { 1314 String appWidgetIdString = Settings.Secure.getStringForUser( 1315 mContentResolver, Settings.Secure.LOCK_SCREEN_APPWIDGET_IDS, userId); 1316 String delims = ","; 1317 if (appWidgetIdString != null && appWidgetIdString.length() > 0) { 1318 String[] appWidgetStringIds = appWidgetIdString.split(delims); 1319 int[] appWidgetIds = new int[appWidgetStringIds.length]; 1320 for (int i = 0; i < appWidgetStringIds.length; i++) { 1321 String appWidget = appWidgetStringIds[i]; 1322 try { 1323 appWidgetIds[i] = Integer.decode(appWidget); 1324 } catch (NumberFormatException e) { 1325 Log.d(TAG, "Error when parsing widget id " + appWidget); 1326 return null; 1327 } 1328 } 1329 return appWidgetIds; 1330 } 1331 return new int[0]; 1332 } 1333 1334 private static String combineStrings(int[] list, String separator) { 1335 int listLength = list.length; 1336 1337 switch (listLength) { 1338 case 0: { 1339 return ""; 1340 } 1341 case 1: { 1342 return Integer.toString(list[0]); 1343 } 1344 } 1345 1346 int strLength = 0; 1347 int separatorLength = separator.length(); 1348 1349 String[] stringList = new String[list.length]; 1350 for (int i = 0; i < listLength; i++) { 1351 stringList[i] = Integer.toString(list[i]); 1352 strLength += stringList[i].length(); 1353 if (i < listLength - 1) { 1354 strLength += separatorLength; 1355 } 1356 } 1357 1358 StringBuilder sb = new StringBuilder(strLength); 1359 1360 for (int i = 0; i < listLength; i++) { 1361 sb.append(list[i]); 1362 if (i < listLength - 1) { 1363 sb.append(separator); 1364 } 1365 } 1366 1367 return sb.toString(); 1368 } 1369 1370 // appwidget used when appwidgets are disabled (we make an exception for 1371 // default clock widget) 1372 public void writeFallbackAppWidgetId(int appWidgetId) { 1373 Settings.Secure.putIntForUser(mContentResolver, 1374 Settings.Secure.LOCK_SCREEN_FALLBACK_APPWIDGET_ID, 1375 appWidgetId, 1376 UserHandle.USER_CURRENT); 1377 } 1378 1379 // appwidget used when appwidgets are disabled (we make an exception for 1380 // default clock widget) 1381 public int getFallbackAppWidgetId() { 1382 return Settings.Secure.getIntForUser( 1383 mContentResolver, 1384 Settings.Secure.LOCK_SCREEN_FALLBACK_APPWIDGET_ID, 1385 AppWidgetManager.INVALID_APPWIDGET_ID, 1386 UserHandle.USER_CURRENT); 1387 } 1388 1389 private void writeAppWidgets(int[] appWidgetIds) { 1390 Settings.Secure.putStringForUser(mContentResolver, 1391 Settings.Secure.LOCK_SCREEN_APPWIDGET_IDS, 1392 combineStrings(appWidgetIds, ","), 1393 UserHandle.USER_CURRENT); 1394 } 1395 1396 // TODO: log an error if this returns false 1397 public boolean addAppWidget(int widgetId, int index) { 1398 int[] widgets = getAppWidgets(); 1399 if (widgets == null) { 1400 return false; 1401 } 1402 if (index < 0 || index > widgets.length) { 1403 return false; 1404 } 1405 int[] newWidgets = new int[widgets.length + 1]; 1406 for (int i = 0, j = 0; i < newWidgets.length; i++) { 1407 if (index == i) { 1408 newWidgets[i] = widgetId; 1409 i++; 1410 } 1411 if (i < newWidgets.length) { 1412 newWidgets[i] = widgets[j]; 1413 j++; 1414 } 1415 } 1416 writeAppWidgets(newWidgets); 1417 return true; 1418 } 1419 1420 public boolean removeAppWidget(int widgetId) { 1421 int[] widgets = getAppWidgets(); 1422 1423 if (widgets.length == 0) { 1424 return false; 1425 } 1426 1427 int[] newWidgets = new int[widgets.length - 1]; 1428 for (int i = 0, j = 0; i < widgets.length; i++) { 1429 if (widgets[i] == widgetId) { 1430 // continue... 1431 } else if (j >= newWidgets.length) { 1432 // we couldn't find the widget 1433 return false; 1434 } else { 1435 newWidgets[j] = widgets[i]; 1436 j++; 1437 } 1438 } 1439 writeAppWidgets(newWidgets); 1440 return true; 1441 } 1442 1443 private long getLong(String secureSettingKey, long defaultValue, int userHandle) { 1444 try { 1445 return getLockSettings().getLong(secureSettingKey, defaultValue, userHandle); 1446 } catch (RemoteException re) { 1447 return defaultValue; 1448 } 1449 } 1450 1451 private long getLong(String secureSettingKey, long defaultValue) { 1452 try { 1453 return getLockSettings().getLong(secureSettingKey, defaultValue, 1454 getCurrentOrCallingUserId()); 1455 } catch (RemoteException re) { 1456 return defaultValue; 1457 } 1458 } 1459 1460 private void setLong(String secureSettingKey, long value) { 1461 setLong(secureSettingKey, value, getCurrentOrCallingUserId()); 1462 } 1463 1464 private void setLong(String secureSettingKey, long value, int userHandle) { 1465 try { 1466 getLockSettings().setLong(secureSettingKey, value, userHandle); 1467 } catch (RemoteException re) { 1468 // What can we do? 1469 Log.e(TAG, "Couldn't write long " + secureSettingKey + re); 1470 } 1471 } 1472 1473 private String getString(String secureSettingKey) { 1474 return getString(secureSettingKey, getCurrentOrCallingUserId()); 1475 } 1476 1477 private String getString(String secureSettingKey, int userHandle) { 1478 try { 1479 return getLockSettings().getString(secureSettingKey, null, userHandle); 1480 } catch (RemoteException re) { 1481 return null; 1482 } 1483 } 1484 1485 private void setString(String secureSettingKey, String value, int userHandle) { 1486 try { 1487 getLockSettings().setString(secureSettingKey, value, userHandle); 1488 } catch (RemoteException re) { 1489 // What can we do? 1490 Log.e(TAG, "Couldn't write string " + secureSettingKey + re); 1491 } 1492 } 1493 1494 public boolean isSecure() { 1495 long mode = getKeyguardStoredPasswordQuality(); 1496 final boolean isPattern = mode == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 1497 final boolean isPassword = mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1498 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1499 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1500 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1501 || mode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1502 final boolean secure = isPattern && isLockPatternEnabled() && savedPatternExists() 1503 || isPassword && savedPasswordExists(); 1504 return secure; 1505 } 1506 1507 /** 1508 * Sets the emergency button visibility based on isEmergencyCallCapable(). 1509 * 1510 * If the emergency button is visible, sets the text on the emergency button 1511 * to indicate what action will be taken. 1512 * 1513 * If there's currently a call in progress, the button will take them to the call 1514 * @param button The button to update 1515 * @param shown Indicates whether the given screen wants the emergency button to show at all 1516 * @param showIcon Indicates whether to show a phone icon for the button. 1517 */ 1518 public void updateEmergencyCallButtonState(Button button, boolean shown, boolean showIcon) { 1519 if (isEmergencyCallCapable() && shown) { 1520 button.setVisibility(View.VISIBLE); 1521 } else { 1522 button.setVisibility(View.GONE); 1523 return; 1524 } 1525 1526 int textId; 1527 if (isInCall()) { 1528 // show "return to call" text and show phone icon 1529 textId = R.string.lockscreen_return_to_call; 1530 int phoneCallIcon = showIcon ? R.drawable.stat_sys_phone_call : 0; 1531 button.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0); 1532 } else { 1533 textId = R.string.lockscreen_emergency_call; 1534 int emergencyIcon = showIcon ? R.drawable.ic_emergency : 0; 1535 button.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0); 1536 } 1537 button.setText(textId); 1538 } 1539 1540 /** 1541 * Resumes a call in progress. Typically launched from the EmergencyCall button 1542 * on various lockscreens. 1543 */ 1544 public void resumeCall() { 1545 getTelecommManager().showInCallScreen(false); 1546 } 1547 1548 /** 1549 * @return {@code true} if there is a call currently in progress, {@code false} otherwise. 1550 */ 1551 public boolean isInCall() { 1552 return getTelecommManager().isInCall(); 1553 } 1554 1555 private TelecomManager getTelecommManager() { 1556 return (TelecomManager) mContext.getSystemService(Context.TELECOM_SERVICE); 1557 } 1558 1559 private void finishBiometricWeak() { 1560 setBoolean(BIOMETRIC_WEAK_EVER_CHOSEN_KEY, true); 1561 1562 // Launch intent to show final screen, this also 1563 // moves the temporary gallery to the actual gallery 1564 Intent intent = new Intent(); 1565 intent.setClassName("com.android.facelock", 1566 "com.android.facelock.SetupEndScreen"); 1567 mContext.startActivity(intent); 1568 } 1569 1570 public void setPowerButtonInstantlyLocks(boolean enabled) { 1571 setBoolean(LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, enabled); 1572 } 1573 1574 public boolean getPowerButtonInstantlyLocks() { 1575 return getBoolean(LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, true); 1576 } 1577 1578 public static boolean isSafeModeEnabled() { 1579 try { 1580 return IWindowManager.Stub.asInterface( 1581 ServiceManager.getService("window")).isSafeModeEnabled(); 1582 } catch (RemoteException e) { 1583 // Shouldn't happen! 1584 } 1585 return false; 1586 } 1587 1588 /** 1589 * Determine whether the user has selected any non-system widgets in keyguard 1590 * 1591 * @return true if widgets have been selected 1592 */ 1593 public boolean hasWidgetsEnabledInKeyguard(int userid) { 1594 int widgets[] = getAppWidgets(userid); 1595 for (int i = 0; i < widgets.length; i++) { 1596 if (widgets[i] > 0) { 1597 return true; 1598 } 1599 } 1600 return false; 1601 } 1602 1603 public boolean getWidgetsEnabled() { 1604 return getWidgetsEnabled(getCurrentOrCallingUserId()); 1605 } 1606 1607 public boolean getWidgetsEnabled(int userId) { 1608 return getBoolean(LOCKSCREEN_WIDGETS_ENABLED, false, userId); 1609 } 1610 1611 public void setWidgetsEnabled(boolean enabled) { 1612 setWidgetsEnabled(enabled, getCurrentOrCallingUserId()); 1613 } 1614 1615 public void setWidgetsEnabled(boolean enabled, int userId) { 1616 setBoolean(LOCKSCREEN_WIDGETS_ENABLED, enabled, userId); 1617 } 1618 1619 public void setEnabledTrustAgents(Collection<ComponentName> activeTrustAgents) { 1620 setEnabledTrustAgents(activeTrustAgents, getCurrentOrCallingUserId()); 1621 } 1622 1623 public List<ComponentName> getEnabledTrustAgents() { 1624 return getEnabledTrustAgents(getCurrentOrCallingUserId()); 1625 } 1626 1627 public void setEnabledTrustAgents(Collection<ComponentName> activeTrustAgents, int userId) { 1628 StringBuilder sb = new StringBuilder(); 1629 for (ComponentName cn : activeTrustAgents) { 1630 if (sb.length() > 0) { 1631 sb.append(','); 1632 } 1633 sb.append(cn.flattenToShortString()); 1634 } 1635 setString(ENABLED_TRUST_AGENTS, sb.toString(), userId); 1636 getTrustManager().reportEnabledTrustAgentsChanged(getCurrentOrCallingUserId()); 1637 } 1638 1639 public List<ComponentName> getEnabledTrustAgents(int userId) { 1640 String serialized = getString(ENABLED_TRUST_AGENTS, userId); 1641 if (TextUtils.isEmpty(serialized)) { 1642 return null; 1643 } 1644 String[] split = serialized.split(","); 1645 ArrayList<ComponentName> activeTrustAgents = new ArrayList<ComponentName>(split.length); 1646 for (String s : split) { 1647 if (!TextUtils.isEmpty(s)) { 1648 activeTrustAgents.add(ComponentName.unflattenFromString(s)); 1649 } 1650 } 1651 return activeTrustAgents; 1652 } 1653 1654 /** 1655 * @see android.app.trust.TrustManager#reportRequireCredentialEntry(int) 1656 */ 1657 public void requireCredentialEntry(int userId) { 1658 getTrustManager().reportRequireCredentialEntry(userId); 1659 } 1660 1661 private void onAfterChangingPassword() { 1662 getTrustManager().reportEnabledTrustAgentsChanged(getCurrentOrCallingUserId()); 1663 } 1664} 1665