LockPatternUtils.java revision 3a5a0be61ec7ea08884c80817c226f7cfe531a67
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.UserHandle; 37import android.os.UserManager; 38import android.os.storage.IMountService; 39import android.os.storage.StorageManager; 40import android.provider.Settings; 41import android.telecom.TelecomManager; 42import android.text.TextUtils; 43import android.util.Log; 44import android.view.IWindowManager; 45import android.view.View; 46import android.widget.Button; 47 48import com.android.internal.R; 49import com.google.android.collect.Lists; 50 51import java.security.MessageDigest; 52import java.security.NoSuchAlgorithmException; 53import java.security.SecureRandom; 54import java.util.ArrayList; 55import java.util.Collection; 56import java.util.List; 57 58/** 59 * Utilities for the lock pattern and its settings. 60 */ 61public class LockPatternUtils { 62 63 private static final String TAG = "LockPatternUtils"; 64 private static final boolean DEBUG = false; 65 66 /** 67 * The maximum number of incorrect attempts before the user is prevented 68 * from trying again for {@link #FAILED_ATTEMPT_TIMEOUT_MS}. 69 */ 70 public static final int FAILED_ATTEMPTS_BEFORE_TIMEOUT = 5; 71 72 /** 73 * The number of incorrect attempts before which we fall back on an alternative 74 * method of verifying the user, and resetting their lock pattern. 75 */ 76 public static final int FAILED_ATTEMPTS_BEFORE_RESET = 20; 77 78 /** 79 * How long the user is prevented from trying again after entering the 80 * wrong pattern too many times. 81 */ 82 public static final long FAILED_ATTEMPT_TIMEOUT_MS = 30000L; 83 84 /** 85 * The interval of the countdown for showing progress of the lockout. 86 */ 87 public static final long FAILED_ATTEMPT_COUNTDOWN_INTERVAL_MS = 1000L; 88 89 90 /** 91 * This dictates when we start telling the user that continued failed attempts will wipe 92 * their device. 93 */ 94 public static final int FAILED_ATTEMPTS_BEFORE_WIPE_GRACE = 5; 95 96 /** 97 * The minimum number of dots in a valid pattern. 98 */ 99 public static final int MIN_LOCK_PATTERN_SIZE = 4; 100 101 /** 102 * The minimum number of dots the user must include in a wrong pattern 103 * attempt for it to be counted against the counts that affect 104 * {@link #FAILED_ATTEMPTS_BEFORE_TIMEOUT} and {@link #FAILED_ATTEMPTS_BEFORE_RESET} 105 */ 106 public static final int MIN_PATTERN_REGISTER_FAIL = MIN_LOCK_PATTERN_SIZE; 107 108 /** 109 * Tells the keyguard to show the user switcher when the keyguard is created. 110 */ 111 public static final String KEYGUARD_SHOW_USER_SWITCHER = "showuserswitcher"; 112 113 /** 114 * Tells the keyguard to show the security challenge when the keyguard is created. 115 */ 116 public static final String KEYGUARD_SHOW_SECURITY_CHALLENGE = "showsecuritychallenge"; 117 118 /** 119 * Tells the keyguard to show the widget with the specified id when the keyguard is created. 120 */ 121 public static final String KEYGUARD_SHOW_APPWIDGET = "showappwidget"; 122 123 /** 124 * The bit in LOCK_BIOMETRIC_WEAK_FLAGS to be used to indicate whether liveliness should 125 * be used 126 */ 127 public static final int FLAG_BIOMETRIC_WEAK_LIVELINESS = 0x1; 128 129 /** 130 * Pseudo-appwidget id we use to represent the default clock status widget 131 */ 132 public static final int ID_DEFAULT_STATUS_WIDGET = -2; 133 134 public final static String LOCKOUT_PERMANENT_KEY = "lockscreen.lockedoutpermanently"; 135 public final static String LOCKOUT_ATTEMPT_DEADLINE = "lockscreen.lockoutattemptdeadline"; 136 public final static String PATTERN_EVER_CHOSEN_KEY = "lockscreen.patterneverchosen"; 137 public final static String PASSWORD_TYPE_KEY = "lockscreen.password_type"; 138 public static final String PASSWORD_TYPE_ALTERNATE_KEY = "lockscreen.password_type_alternate"; 139 public final static String LOCK_PASSWORD_SALT_KEY = "lockscreen.password_salt"; 140 public final static String DISABLE_LOCKSCREEN_KEY = "lockscreen.disabled"; 141 public final static String LOCKSCREEN_OPTIONS = "lockscreen.options"; 142 public final static String LOCKSCREEN_BIOMETRIC_WEAK_FALLBACK 143 = "lockscreen.biometric_weak_fallback"; 144 public final static String BIOMETRIC_WEAK_EVER_CHOSEN_KEY 145 = "lockscreen.biometricweakeverchosen"; 146 public final static String LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS 147 = "lockscreen.power_button_instantly_locks"; 148 public final static String LOCKSCREEN_WIDGETS_ENABLED = "lockscreen.widgets_enabled"; 149 150 public final static String PASSWORD_HISTORY_KEY = "lockscreen.passwordhistory"; 151 152 private static final String LOCK_SCREEN_OWNER_INFO = Settings.Secure.LOCK_SCREEN_OWNER_INFO; 153 private static final String LOCK_SCREEN_OWNER_INFO_ENABLED = 154 Settings.Secure.LOCK_SCREEN_OWNER_INFO_ENABLED; 155 156 private static final String ENABLED_TRUST_AGENTS = "lockscreen.enabledtrustagents"; 157 158 // Maximum allowed number of repeated or ordered characters in a sequence before we'll 159 // consider it a complex PIN/password. 160 public static final int MAX_ALLOWED_SEQUENCE = 3; 161 162 private final Context mContext; 163 private final ContentResolver mContentResolver; 164 private DevicePolicyManager mDevicePolicyManager; 165 private ILockSettings mLockSettingsService; 166 167 private final boolean mMultiUserMode; 168 169 // The current user is set by KeyguardViewMediator and shared by all LockPatternUtils. 170 private static volatile int sCurrentUserId = UserHandle.USER_NULL; 171 172 public DevicePolicyManager getDevicePolicyManager() { 173 if (mDevicePolicyManager == null) { 174 mDevicePolicyManager = 175 (DevicePolicyManager)mContext.getSystemService(Context.DEVICE_POLICY_SERVICE); 176 if (mDevicePolicyManager == null) { 177 Log.e(TAG, "Can't get DevicePolicyManagerService: is it running?", 178 new IllegalStateException("Stack trace:")); 179 } 180 } 181 return mDevicePolicyManager; 182 } 183 184 private TrustManager getTrustManager() { 185 TrustManager trust = (TrustManager) mContext.getSystemService(Context.TRUST_SERVICE); 186 if (trust == null) { 187 Log.e(TAG, "Can't get TrustManagerService: is it running?", 188 new IllegalStateException("Stack trace:")); 189 } 190 return trust; 191 } 192 193 /** 194 * @param contentResolver Used to look up and save settings. 195 */ 196 public LockPatternUtils(Context context) { 197 mContext = context; 198 mContentResolver = context.getContentResolver(); 199 200 // If this is being called by the system or by an application like keyguard that 201 // has permision INTERACT_ACROSS_USERS, then LockPatternUtils will operate in multi-user 202 // mode where calls are for the current user rather than the user of the calling process. 203 mMultiUserMode = context.checkCallingOrSelfPermission( 204 Manifest.permission.INTERACT_ACROSS_USERS_FULL) == PackageManager.PERMISSION_GRANTED; 205 } 206 207 private ILockSettings getLockSettings() { 208 if (mLockSettingsService == null) { 209 mLockSettingsService = LockPatternUtilsCache.getInstance( 210 ILockSettings.Stub.asInterface(ServiceManager.getService("lock_settings"))); 211 } 212 return mLockSettingsService; 213 } 214 215 public int getRequestedMinimumPasswordLength() { 216 return getDevicePolicyManager().getPasswordMinimumLength(null, getCurrentOrCallingUserId()); 217 } 218 219 /** 220 * Gets the device policy password mode. If the mode is non-specific, returns 221 * MODE_PATTERN which allows the user to choose anything. 222 */ 223 public int getRequestedPasswordQuality() { 224 return getDevicePolicyManager().getPasswordQuality(null, getCurrentOrCallingUserId()); 225 } 226 227 public int getRequestedPasswordHistoryLength() { 228 return getDevicePolicyManager().getPasswordHistoryLength(null, getCurrentOrCallingUserId()); 229 } 230 231 public int getRequestedPasswordMinimumLetters() { 232 return getDevicePolicyManager().getPasswordMinimumLetters(null, 233 getCurrentOrCallingUserId()); 234 } 235 236 public int getRequestedPasswordMinimumUpperCase() { 237 return getDevicePolicyManager().getPasswordMinimumUpperCase(null, 238 getCurrentOrCallingUserId()); 239 } 240 241 public int getRequestedPasswordMinimumLowerCase() { 242 return getDevicePolicyManager().getPasswordMinimumLowerCase(null, 243 getCurrentOrCallingUserId()); 244 } 245 246 public int getRequestedPasswordMinimumNumeric() { 247 return getDevicePolicyManager().getPasswordMinimumNumeric(null, 248 getCurrentOrCallingUserId()); 249 } 250 251 public int getRequestedPasswordMinimumSymbols() { 252 return getDevicePolicyManager().getPasswordMinimumSymbols(null, 253 getCurrentOrCallingUserId()); 254 } 255 256 public int getRequestedPasswordMinimumNonLetter() { 257 return getDevicePolicyManager().getPasswordMinimumNonLetter(null, 258 getCurrentOrCallingUserId()); 259 } 260 261 public void reportFailedPasswordAttempt() { 262 int userId = getCurrentOrCallingUserId(); 263 getDevicePolicyManager().reportFailedPasswordAttempt(userId); 264 getTrustManager().reportUnlockAttempt(false /* authenticated */, userId); 265 getTrustManager().reportRequireCredentialEntry(userId); 266 } 267 268 public void reportSuccessfulPasswordAttempt() { 269 getDevicePolicyManager().reportSuccessfulPasswordAttempt(getCurrentOrCallingUserId()); 270 getTrustManager().reportUnlockAttempt(true /* authenticated */, 271 getCurrentOrCallingUserId()); 272 } 273 274 public void setCurrentUser(int userId) { 275 sCurrentUserId = userId; 276 } 277 278 public int getCurrentUser() { 279 if (sCurrentUserId != UserHandle.USER_NULL) { 280 // Someone is regularly updating using setCurrentUser() use that value. 281 return sCurrentUserId; 282 } 283 try { 284 return ActivityManagerNative.getDefault().getCurrentUser().id; 285 } catch (RemoteException re) { 286 return UserHandle.USER_OWNER; 287 } 288 } 289 290 public void removeUser(int userId) { 291 try { 292 getLockSettings().removeUser(userId); 293 } catch (RemoteException re) { 294 Log.e(TAG, "Couldn't remove lock settings for user " + userId); 295 } 296 } 297 298 private int getCurrentOrCallingUserId() { 299 if (mMultiUserMode) { 300 // TODO: This is a little inefficient. See if all users of this are able to 301 // handle USER_CURRENT and pass that instead. 302 return getCurrentUser(); 303 } else { 304 return UserHandle.getCallingUserId(); 305 } 306 } 307 308 /** 309 * Check to see if a pattern matches the saved pattern. If no pattern exists, 310 * always returns true. 311 * @param pattern The pattern to check. 312 * @return Whether the pattern matches the stored one. 313 */ 314 public boolean checkPattern(List<LockPatternView.Cell> pattern) { 315 final int userId = getCurrentOrCallingUserId(); 316 try { 317 return getLockSettings().checkPattern(patternToString(pattern), userId); 318 } catch (RemoteException re) { 319 return true; 320 } 321 } 322 323 /** 324 * Check to see if a password matches the saved password. If no password exists, 325 * always returns true. 326 * @param password The password to check. 327 * @return Whether the password matches the stored one. 328 */ 329 public boolean checkPassword(String password) { 330 final int userId = getCurrentOrCallingUserId(); 331 try { 332 return getLockSettings().checkPassword(password, userId); 333 } catch (RemoteException re) { 334 return true; 335 } 336 } 337 338 /** 339 * Check to see if vold already has the password. 340 * Note that this also clears vold's copy of the password. 341 * @return Whether the vold password matches or not. 342 */ 343 public boolean checkVoldPassword() { 344 final int userId = getCurrentOrCallingUserId(); 345 try { 346 return getLockSettings().checkVoldPassword(userId); 347 } catch (RemoteException re) { 348 return false; 349 } 350 } 351 352 /** 353 * Check to see if a password matches any of the passwords stored in the 354 * password history. 355 * 356 * @param password The password to check. 357 * @return Whether the password matches any in the history. 358 */ 359 public boolean checkPasswordHistory(String password) { 360 String passwordHashString = new String( 361 passwordToHash(password, getCurrentOrCallingUserId())); 362 String passwordHistory = getString(PASSWORD_HISTORY_KEY); 363 if (passwordHistory == null) { 364 return false; 365 } 366 // Password History may be too long... 367 int passwordHashLength = passwordHashString.length(); 368 int passwordHistoryLength = getRequestedPasswordHistoryLength(); 369 if(passwordHistoryLength == 0) { 370 return false; 371 } 372 int neededPasswordHistoryLength = passwordHashLength * passwordHistoryLength 373 + passwordHistoryLength - 1; 374 if (passwordHistory.length() > neededPasswordHistoryLength) { 375 passwordHistory = passwordHistory.substring(0, neededPasswordHistoryLength); 376 } 377 return passwordHistory.contains(passwordHashString); 378 } 379 380 /** 381 * Check to see if the user has stored a lock pattern. 382 * @return Whether a saved pattern exists. 383 */ 384 public boolean savedPatternExists() { 385 try { 386 return getLockSettings().havePattern(getCurrentOrCallingUserId()); 387 } catch (RemoteException re) { 388 return false; 389 } 390 } 391 392 /** 393 * Check to see if the user has stored a lock pattern. 394 * @return Whether a saved pattern exists. 395 */ 396 public boolean savedPasswordExists() { 397 try { 398 return getLockSettings().havePassword(getCurrentOrCallingUserId()); 399 } catch (RemoteException re) { 400 return false; 401 } 402 } 403 404 /** 405 * Return true if the user has ever chosen a pattern. This is true even if the pattern is 406 * currently cleared. 407 * 408 * @return True if the user has ever chosen a pattern. 409 */ 410 public boolean isPatternEverChosen() { 411 return getBoolean(PATTERN_EVER_CHOSEN_KEY, false); 412 } 413 414 /** 415 * Return true if the user has ever chosen biometric weak. This is true even if biometric 416 * weak is not current set. 417 * 418 * @return True if the user has ever chosen biometric weak. 419 */ 420 public boolean isBiometricWeakEverChosen() { 421 return getBoolean(BIOMETRIC_WEAK_EVER_CHOSEN_KEY, false); 422 } 423 424 /** 425 * Used by device policy manager to validate the current password 426 * information it has. 427 */ 428 public int getActivePasswordQuality() { 429 int activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED; 430 // Note we don't want to use getKeyguardStoredPasswordQuality() because we want this to 431 // return biometric_weak if that is being used instead of the backup 432 int quality = 433 (int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 434 switch (quality) { 435 case DevicePolicyManager.PASSWORD_QUALITY_SOMETHING: 436 if (isLockPatternEnabled()) { 437 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 438 } 439 break; 440 case DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK: 441 if (isBiometricWeakInstalled()) { 442 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK; 443 } 444 break; 445 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC: 446 if (isLockPasswordEnabled()) { 447 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_NUMERIC; 448 } 449 break; 450 case DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX: 451 if (isLockPasswordEnabled()) { 452 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX; 453 } 454 break; 455 case DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC: 456 if (isLockPasswordEnabled()) { 457 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC; 458 } 459 break; 460 case DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC: 461 if (isLockPasswordEnabled()) { 462 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC; 463 } 464 break; 465 case DevicePolicyManager.PASSWORD_QUALITY_COMPLEX: 466 if (isLockPasswordEnabled()) { 467 activePasswordQuality = DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 468 } 469 break; 470 } 471 472 return activePasswordQuality; 473 } 474 475 /** 476 * Clear any lock pattern or password. 477 */ 478 public void clearLock(boolean isFallback) { 479 if(!isFallback) deleteGallery(); 480 saveLockPassword(null, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 481 setLockPatternEnabled(false); 482 saveLockPattern(null); 483 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 484 setLong(PASSWORD_TYPE_ALTERNATE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 485 onAfterChangingPassword(); 486 } 487 488 /** 489 * Disable showing lock screen at all when the DevicePolicyManager allows it. 490 * This is only meaningful if pattern, pin or password are not set. 491 * 492 * @param disable Disables lock screen when true 493 */ 494 public void setLockScreenDisabled(boolean disable) { 495 setLong(DISABLE_LOCKSCREEN_KEY, disable ? 1 : 0); 496 } 497 498 /** 499 * Determine if LockScreen can be disabled. This is used, for example, to tell if we should 500 * show LockScreen or go straight to the home screen. 501 * 502 * @return true if lock screen is can be disabled 503 */ 504 public boolean isLockScreenDisabled() { 505 if (!isSecure() && getLong(DISABLE_LOCKSCREEN_KEY, 0) != 0) { 506 // Check if the number of switchable users forces the lockscreen. 507 final List<UserInfo> users = UserManager.get(mContext).getUsers(true); 508 final int userCount = users.size(); 509 int switchableUsers = 0; 510 for (int i = 0; i < userCount; i++) { 511 if (users.get(i).supportsSwitchTo()) { 512 switchableUsers++; 513 } 514 } 515 return switchableUsers < 2; 516 } 517 return false; 518 } 519 520 /** 521 * Calls back SetupFaceLock to delete the temporary gallery file 522 */ 523 public void deleteTempGallery() { 524 Intent intent = new Intent().setAction("com.android.facelock.DELETE_GALLERY"); 525 intent.putExtra("deleteTempGallery", true); 526 mContext.sendBroadcast(intent); 527 } 528 529 /** 530 * Calls back SetupFaceLock to delete the gallery file when the lock type is changed 531 */ 532 void deleteGallery() { 533 if(usingBiometricWeak()) { 534 Intent intent = new Intent().setAction("com.android.facelock.DELETE_GALLERY"); 535 intent.putExtra("deleteGallery", true); 536 mContext.sendBroadcast(intent); 537 } 538 } 539 540 /** 541 * Save a lock pattern. 542 * @param pattern The new pattern to save. 543 */ 544 public void saveLockPattern(List<LockPatternView.Cell> pattern) { 545 this.saveLockPattern(pattern, false); 546 } 547 548 /** 549 * Save a lock pattern. 550 * @param pattern The new pattern to save. 551 * @param isFallback Specifies if this is a fallback to biometric weak 552 */ 553 public void saveLockPattern(List<LockPatternView.Cell> pattern, boolean isFallback) { 554 try { 555 int userId = getCurrentOrCallingUserId(); 556 getLockSettings().setLockPattern(patternToString(pattern), userId); 557 DevicePolicyManager dpm = getDevicePolicyManager(); 558 if (pattern != null) { 559 560 int userHandle = userId; 561 if (userHandle == UserHandle.USER_OWNER) { 562 String stringPattern = patternToString(pattern); 563 updateEncryptionPassword(StorageManager.CRYPT_TYPE_PATTERN, stringPattern); 564 } 565 566 setBoolean(PATTERN_EVER_CHOSEN_KEY, true); 567 if (!isFallback) { 568 deleteGallery(); 569 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 570 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_SOMETHING, 571 pattern.size(), 0, 0, 0, 0, 0, 0, userId); 572 } else { 573 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK); 574 setLong(PASSWORD_TYPE_ALTERNATE_KEY, 575 DevicePolicyManager.PASSWORD_QUALITY_SOMETHING); 576 finishBiometricWeak(); 577 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 578 0, 0, 0, 0, 0, 0, 0, userId); 579 } 580 } else { 581 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 0, 0, 582 0, 0, 0, 0, 0, userId); 583 } 584 onAfterChangingPassword(); 585 } catch (RemoteException re) { 586 Log.e(TAG, "Couldn't save lock pattern " + re); 587 } 588 } 589 590 private void updateCryptoUserInfo() { 591 int userId = getCurrentOrCallingUserId(); 592 if (userId != UserHandle.USER_OWNER) { 593 return; 594 } 595 596 final String ownerInfo = isOwnerInfoEnabled() ? getOwnerInfo(userId) : ""; 597 598 IBinder service = ServiceManager.getService("mount"); 599 if (service == null) { 600 Log.e(TAG, "Could not find the mount service to update the user info"); 601 return; 602 } 603 604 IMountService mountService = IMountService.Stub.asInterface(service); 605 try { 606 Log.d(TAG, "Setting owner info"); 607 mountService.setField("OwnerInfo", ownerInfo); 608 } catch (RemoteException e) { 609 Log.e(TAG, "Error changing user info", e); 610 } 611 } 612 613 public void setOwnerInfo(String info, int userId) { 614 setString(LOCK_SCREEN_OWNER_INFO, info, userId); 615 updateCryptoUserInfo(); 616 } 617 618 public void setOwnerInfoEnabled(boolean enabled) { 619 setBoolean(LOCK_SCREEN_OWNER_INFO_ENABLED, enabled); 620 updateCryptoUserInfo(); 621 } 622 623 public String getOwnerInfo(int userId) { 624 return getString(LOCK_SCREEN_OWNER_INFO); 625 } 626 627 public boolean isOwnerInfoEnabled() { 628 return getBoolean(LOCK_SCREEN_OWNER_INFO_ENABLED, false); 629 } 630 631 /** 632 * Compute the password quality from the given password string. 633 */ 634 static public int computePasswordQuality(String password) { 635 boolean hasDigit = false; 636 boolean hasNonDigit = false; 637 final int len = password.length(); 638 for (int i = 0; i < len; i++) { 639 if (Character.isDigit(password.charAt(i))) { 640 hasDigit = true; 641 } else { 642 hasNonDigit = true; 643 } 644 } 645 646 if (hasNonDigit && hasDigit) { 647 return DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC; 648 } 649 if (hasNonDigit) { 650 return DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC; 651 } 652 if (hasDigit) { 653 return maxLengthSequence(password) > MAX_ALLOWED_SEQUENCE 654 ? DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 655 : DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX; 656 } 657 return DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED; 658 } 659 660 private static int categoryChar(char c) { 661 if ('a' <= c && c <= 'z') return 0; 662 if ('A' <= c && c <= 'Z') return 1; 663 if ('0' <= c && c <= '9') return 2; 664 return 3; 665 } 666 667 private static int maxDiffCategory(int category) { 668 if (category == 0 || category == 1) return 1; 669 else if (category == 2) return 10; 670 return 0; 671 } 672 673 /* 674 * Returns the maximum length of a sequential characters. A sequence is defined as 675 * monotonically increasing characters with a constant interval or the same character repeated. 676 * 677 * For example: 678 * maxLengthSequence("1234") == 4 679 * maxLengthSequence("1234abc") == 4 680 * maxLengthSequence("aabc") == 3 681 * maxLengthSequence("qwertyuio") == 1 682 * maxLengthSequence("@ABC") == 3 683 * maxLengthSequence(";;;;") == 4 (anything that repeats) 684 * maxLengthSequence(":;<=>") == 1 (ordered, but not composed of alphas or digits) 685 * 686 * @param string the pass 687 * @return the number of sequential letters or digits 688 */ 689 public static int maxLengthSequence(String string) { 690 if (string.length() == 0) return 0; 691 char previousChar = string.charAt(0); 692 int category = categoryChar(previousChar); //current category of the sequence 693 int diff = 0; //difference between two consecutive characters 694 boolean hasDiff = false; //if we are currently targeting a sequence 695 int maxLength = 0; //maximum length of a sequence already found 696 int startSequence = 0; //where the current sequence started 697 for (int current = 1; current < string.length(); current++) { 698 char currentChar = string.charAt(current); 699 int categoryCurrent = categoryChar(currentChar); 700 int currentDiff = (int) currentChar - (int) previousChar; 701 if (categoryCurrent != category || Math.abs(currentDiff) > maxDiffCategory(category)) { 702 maxLength = Math.max(maxLength, current - startSequence); 703 startSequence = current; 704 hasDiff = false; 705 category = categoryCurrent; 706 } 707 else { 708 if(hasDiff && currentDiff != diff) { 709 maxLength = Math.max(maxLength, current - startSequence); 710 startSequence = current - 1; 711 } 712 diff = currentDiff; 713 hasDiff = true; 714 } 715 previousChar = currentChar; 716 } 717 maxLength = Math.max(maxLength, string.length() - startSequence); 718 return maxLength; 719 } 720 721 /** Update the encryption password if it is enabled **/ 722 private void updateEncryptionPassword(final int type, final String password) { 723 DevicePolicyManager dpm = getDevicePolicyManager(); 724 if (dpm.getStorageEncryptionStatus(getCurrentOrCallingUserId()) 725 != DevicePolicyManager.ENCRYPTION_STATUS_ACTIVE) { 726 return; 727 } 728 729 final IBinder service = ServiceManager.getService("mount"); 730 if (service == null) { 731 Log.e(TAG, "Could not find the mount service to update the encryption password"); 732 return; 733 } 734 735 new AsyncTask<Void, Void, Void>() { 736 @Override 737 protected Void doInBackground(Void... dummy) { 738 IMountService mountService = IMountService.Stub.asInterface(service); 739 try { 740 mountService.changeEncryptionPassword(type, password); 741 } catch (RemoteException e) { 742 Log.e(TAG, "Error changing encryption password", e); 743 } 744 return null; 745 } 746 }.execute(); 747 } 748 749 /** 750 * Save a lock password. Does not ensure that the password is as good 751 * as the requested mode, but will adjust the mode to be as good as the 752 * pattern. 753 * @param password The password to save 754 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 755 */ 756 public void saveLockPassword(String password, int quality) { 757 this.saveLockPassword(password, quality, false, getCurrentOrCallingUserId()); 758 } 759 760 /** 761 * Save a lock password. Does not ensure that the password is as good 762 * as the requested mode, but will adjust the mode to be as good as the 763 * pattern. 764 * @param password The password to save 765 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 766 * @param isFallback Specifies if this is a fallback to biometric weak 767 */ 768 public void saveLockPassword(String password, int quality, boolean isFallback) { 769 saveLockPassword(password, quality, isFallback, getCurrentOrCallingUserId()); 770 } 771 772 /** 773 * Save a lock password. Does not ensure that the password is as good 774 * as the requested mode, but will adjust the mode to be as good as the 775 * pattern. 776 * @param password The password to save 777 * @param quality {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 778 * @param isFallback Specifies if this is a fallback to biometric weak 779 * @param userHandle The userId of the user to change the password for 780 */ 781 public void saveLockPassword(String password, int quality, boolean isFallback, int userHandle) { 782 try { 783 getLockSettings().setLockPassword(password, userHandle); 784 DevicePolicyManager dpm = getDevicePolicyManager(); 785 if (!TextUtils.isEmpty(password)) { 786 int computedQuality = computePasswordQuality(password); 787 788 if (userHandle == UserHandle.USER_OWNER) { 789 // Update the encryption password. 790 int type = computedQuality == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 791 || computedQuality == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 792 ? StorageManager.CRYPT_TYPE_PIN 793 : StorageManager.CRYPT_TYPE_PASSWORD; 794 updateEncryptionPassword(type, password); 795 } 796 797 if (!isFallback) { 798 deleteGallery(); 799 setLong(PASSWORD_TYPE_KEY, Math.max(quality, computedQuality), userHandle); 800 if (computedQuality != DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) { 801 int letters = 0; 802 int uppercase = 0; 803 int lowercase = 0; 804 int numbers = 0; 805 int symbols = 0; 806 int nonletter = 0; 807 for (int i = 0; i < password.length(); i++) { 808 char c = password.charAt(i); 809 if (c >= 'A' && c <= 'Z') { 810 letters++; 811 uppercase++; 812 } else if (c >= 'a' && c <= 'z') { 813 letters++; 814 lowercase++; 815 } else if (c >= '0' && c <= '9') { 816 numbers++; 817 nonletter++; 818 } else { 819 symbols++; 820 nonletter++; 821 } 822 } 823 dpm.setActivePasswordState(Math.max(quality, computedQuality), 824 password.length(), letters, uppercase, lowercase, 825 numbers, symbols, nonletter, userHandle); 826 } else { 827 // The password is not anything. 828 dpm.setActivePasswordState( 829 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 830 0, 0, 0, 0, 0, 0, 0, userHandle); 831 } 832 } else { 833 // Case where it's a fallback for biometric weak 834 setLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 835 userHandle); 836 setLong(PASSWORD_TYPE_ALTERNATE_KEY, Math.max(quality, computedQuality), 837 userHandle); 838 finishBiometricWeak(); 839 dpm.setActivePasswordState(DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK, 840 0, 0, 0, 0, 0, 0, 0, userHandle); 841 } 842 // Add the password to the password history. We assume all 843 // password hashes have the same length for simplicity of implementation. 844 String passwordHistory = getString(PASSWORD_HISTORY_KEY, userHandle); 845 if (passwordHistory == null) { 846 passwordHistory = new String(); 847 } 848 int passwordHistoryLength = getRequestedPasswordHistoryLength(); 849 if (passwordHistoryLength == 0) { 850 passwordHistory = ""; 851 } else { 852 byte[] hash = passwordToHash(password, userHandle); 853 passwordHistory = new String(hash) + "," + passwordHistory; 854 // Cut it to contain passwordHistoryLength hashes 855 // and passwordHistoryLength -1 commas. 856 passwordHistory = passwordHistory.substring(0, Math.min(hash.length 857 * passwordHistoryLength + passwordHistoryLength - 1, passwordHistory 858 .length())); 859 } 860 setString(PASSWORD_HISTORY_KEY, passwordHistory, userHandle); 861 } else { 862 // Empty password 863 if (userHandle == UserHandle.USER_OWNER) { 864 // Set the encryption password to default. 865 updateEncryptionPassword(StorageManager.CRYPT_TYPE_DEFAULT, null); 866 } 867 868 dpm.setActivePasswordState( 869 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, 0, 0, 0, 0, 0, 0, 0, 870 userHandle); 871 } 872 onAfterChangingPassword(); 873 } catch (RemoteException re) { 874 // Cant do much 875 Log.e(TAG, "Unable to save lock password " + re); 876 } 877 } 878 879 /** 880 * Retrieves the quality mode we're in. 881 * {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 882 * 883 * @return stored password quality 884 */ 885 public int getKeyguardStoredPasswordQuality() { 886 return getKeyguardStoredPasswordQuality(getCurrentOrCallingUserId()); 887 } 888 889 /** 890 * Retrieves the quality mode for {@param userHandle}. 891 * {@see DevicePolicyManager#getPasswordQuality(android.content.ComponentName)} 892 * 893 * @return stored password quality 894 */ 895 public int getKeyguardStoredPasswordQuality(int userHandle) { 896 int quality = (int) getLong(PASSWORD_TYPE_KEY, 897 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userHandle); 898 // If the user has chosen to use weak biometric sensor, then return the backup locking 899 // method and treat biometric as a special case. 900 if (quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) { 901 quality = (int) getLong(PASSWORD_TYPE_ALTERNATE_KEY, 902 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED, userHandle); 903 } 904 return quality; 905 } 906 907 /** 908 * @return true if the lockscreen method is set to biometric weak 909 */ 910 public boolean usingBiometricWeak() { 911 int quality = 912 (int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED); 913 return quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK; 914 } 915 916 /** 917 * Deserialize a pattern. 918 * @param string The pattern serialized with {@link #patternToString} 919 * @return The pattern. 920 */ 921 public static List<LockPatternView.Cell> stringToPattern(String string) { 922 List<LockPatternView.Cell> result = Lists.newArrayList(); 923 924 final byte[] bytes = string.getBytes(); 925 for (int i = 0; i < bytes.length; i++) { 926 byte b = bytes[i]; 927 result.add(LockPatternView.Cell.of(b / 3, b % 3)); 928 } 929 return result; 930 } 931 932 /** 933 * Serialize a pattern. 934 * @param pattern The pattern. 935 * @return The pattern in string form. 936 */ 937 public static String patternToString(List<LockPatternView.Cell> pattern) { 938 if (pattern == null) { 939 return ""; 940 } 941 final int patternSize = pattern.size(); 942 943 byte[] res = new byte[patternSize]; 944 for (int i = 0; i < patternSize; i++) { 945 LockPatternView.Cell cell = pattern.get(i); 946 res[i] = (byte) (cell.getRow() * 3 + cell.getColumn()); 947 } 948 return new String(res); 949 } 950 951 /* 952 * Generate an SHA-1 hash for the pattern. Not the most secure, but it is 953 * at least a second level of protection. First level is that the file 954 * is in a location only readable by the system process. 955 * @param pattern the gesture pattern. 956 * @return the hash of the pattern in a byte array. 957 */ 958 public static byte[] patternToHash(List<LockPatternView.Cell> pattern) { 959 if (pattern == null) { 960 return null; 961 } 962 963 final int patternSize = pattern.size(); 964 byte[] res = new byte[patternSize]; 965 for (int i = 0; i < patternSize; i++) { 966 LockPatternView.Cell cell = pattern.get(i); 967 res[i] = (byte) (cell.getRow() * 3 + cell.getColumn()); 968 } 969 try { 970 MessageDigest md = MessageDigest.getInstance("SHA-1"); 971 byte[] hash = md.digest(res); 972 return hash; 973 } catch (NoSuchAlgorithmException nsa) { 974 return res; 975 } 976 } 977 978 private String getSalt(int userId) { 979 long salt = getLong(LOCK_PASSWORD_SALT_KEY, 0, userId); 980 if (salt == 0) { 981 try { 982 salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 983 setLong(LOCK_PASSWORD_SALT_KEY, salt, userId); 984 Log.v(TAG, "Initialized lock password salt for user: " + userId); 985 } catch (NoSuchAlgorithmException e) { 986 // Throw an exception rather than storing a password we'll never be able to recover 987 throw new IllegalStateException("Couldn't get SecureRandom number", e); 988 } 989 } 990 return Long.toHexString(salt); 991 } 992 993 /* 994 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 995 * Not the most secure, but it is at least a second level of protection. First level is that 996 * the file is in a location only readable by the system process. 997 * @param password the gesture pattern. 998 * @return the hash of the pattern in a byte array. 999 */ 1000 public byte[] passwordToHash(String password, int userId) { 1001 if (password == null) { 1002 return null; 1003 } 1004 String algo = null; 1005 byte[] hashed = null; 1006 try { 1007 byte[] saltedPassword = (password + getSalt(userId)).getBytes(); 1008 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1009 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1010 hashed = (toHex(sha1) + toHex(md5)).getBytes(); 1011 } catch (NoSuchAlgorithmException e) { 1012 Log.w(TAG, "Failed to encode string because of missing algorithm: " + algo); 1013 } 1014 return hashed; 1015 } 1016 1017 private static String toHex(byte[] ary) { 1018 final String hex = "0123456789ABCDEF"; 1019 String ret = ""; 1020 for (int i = 0; i < ary.length; i++) { 1021 ret += hex.charAt((ary[i] >> 4) & 0xf); 1022 ret += hex.charAt(ary[i] & 0xf); 1023 } 1024 return ret; 1025 } 1026 1027 /** 1028 * @return Whether the lock password is enabled, or if it is set as a backup for biometric weak 1029 */ 1030 public boolean isLockPasswordEnabled() { 1031 long mode = getLong(PASSWORD_TYPE_KEY, 0); 1032 long backupMode = getLong(PASSWORD_TYPE_ALTERNATE_KEY, 0); 1033 final boolean passwordEnabled = mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1034 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1035 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1036 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1037 || mode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1038 final boolean backupEnabled = backupMode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1039 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1040 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1041 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1042 || backupMode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1043 1044 return savedPasswordExists() && (passwordEnabled || 1045 (usingBiometricWeak() && backupEnabled)); 1046 } 1047 1048 /** 1049 * @return Whether the lock pattern is enabled, or if it is set as a backup for biometric weak 1050 */ 1051 public boolean isLockPatternEnabled() { 1052 final boolean backupEnabled = 1053 getLong(PASSWORD_TYPE_ALTERNATE_KEY, 1054 DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) 1055 == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 1056 1057 return getBoolean(Settings.Secure.LOCK_PATTERN_ENABLED, false) 1058 && (getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED) 1059 == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING || 1060 (usingBiometricWeak() && backupEnabled)); 1061 } 1062 1063 /** 1064 * @return Whether biometric weak lock is installed and that the front facing camera exists 1065 */ 1066 public boolean isBiometricWeakInstalled() { 1067 // Check that it's installed 1068 PackageManager pm = mContext.getPackageManager(); 1069 try { 1070 pm.getPackageInfo("com.android.facelock", PackageManager.GET_ACTIVITIES); 1071 } catch (PackageManager.NameNotFoundException e) { 1072 return false; 1073 } 1074 1075 // Check that the camera is enabled 1076 if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA_FRONT)) { 1077 return false; 1078 } 1079 if (getDevicePolicyManager().getCameraDisabled(null, getCurrentOrCallingUserId())) { 1080 return false; 1081 } 1082 1083 // TODO: If we decide not to proceed with Face Unlock as a trustlet, this must be changed 1084 // back to returning true. If we become certain that Face Unlock will be a trustlet, this 1085 // entire function and a lot of other code can be removed. 1086 if (DEBUG) Log.d(TAG, "Forcing isBiometricWeakInstalled() to return false to disable it"); 1087 return false; 1088 } 1089 1090 /** 1091 * Set whether biometric weak liveliness is enabled. 1092 */ 1093 public void setBiometricWeakLivelinessEnabled(boolean enabled) { 1094 long currentFlag = getLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, 0L); 1095 long newFlag; 1096 if (enabled) { 1097 newFlag = currentFlag | FLAG_BIOMETRIC_WEAK_LIVELINESS; 1098 } else { 1099 newFlag = currentFlag & ~FLAG_BIOMETRIC_WEAK_LIVELINESS; 1100 } 1101 setLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, newFlag); 1102 } 1103 1104 /** 1105 * @return Whether the biometric weak liveliness is enabled. 1106 */ 1107 public boolean isBiometricWeakLivelinessEnabled() { 1108 long currentFlag = getLong(Settings.Secure.LOCK_BIOMETRIC_WEAK_FLAGS, 0L); 1109 return ((currentFlag & FLAG_BIOMETRIC_WEAK_LIVELINESS) != 0); 1110 } 1111 1112 /** 1113 * Set whether the lock pattern is enabled. 1114 */ 1115 public void setLockPatternEnabled(boolean enabled) { 1116 setBoolean(Settings.Secure.LOCK_PATTERN_ENABLED, enabled); 1117 } 1118 1119 /** 1120 * @return Whether the visible pattern is enabled. 1121 */ 1122 public boolean isVisiblePatternEnabled() { 1123 return getBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, false); 1124 } 1125 1126 /** 1127 * Set whether the visible pattern is enabled. 1128 */ 1129 public void setVisiblePatternEnabled(boolean enabled) { 1130 setBoolean(Settings.Secure.LOCK_PATTERN_VISIBLE, enabled); 1131 1132 // Update for crypto if owner 1133 int userId = getCurrentOrCallingUserId(); 1134 if (userId != UserHandle.USER_OWNER) { 1135 return; 1136 } 1137 1138 IBinder service = ServiceManager.getService("mount"); 1139 if (service == null) { 1140 Log.e(TAG, "Could not find the mount service to update the user info"); 1141 return; 1142 } 1143 1144 IMountService mountService = IMountService.Stub.asInterface(service); 1145 try { 1146 mountService.setField("PatternVisible", enabled ? "1" : "0"); 1147 } catch (RemoteException e) { 1148 Log.e(TAG, "Error changing pattern visible state", e); 1149 } 1150 } 1151 1152 /** 1153 * @return Whether tactile feedback for the pattern is enabled. 1154 */ 1155 public boolean isTactileFeedbackEnabled() { 1156 return Settings.System.getIntForUser(mContentResolver, 1157 Settings.System.HAPTIC_FEEDBACK_ENABLED, 1, UserHandle.USER_CURRENT) != 0; 1158 } 1159 1160 /** 1161 * Set and store the lockout deadline, meaning the user can't attempt his/her unlock 1162 * pattern until the deadline has passed. 1163 * @return the chosen deadline. 1164 */ 1165 public long setLockoutAttemptDeadline() { 1166 final long deadline = SystemClock.elapsedRealtime() + FAILED_ATTEMPT_TIMEOUT_MS; 1167 setLong(LOCKOUT_ATTEMPT_DEADLINE, deadline); 1168 return deadline; 1169 } 1170 1171 /** 1172 * @return The elapsed time in millis in the future when the user is allowed to 1173 * attempt to enter his/her lock pattern, or 0 if the user is welcome to 1174 * enter a pattern. 1175 */ 1176 public long getLockoutAttemptDeadline() { 1177 final long deadline = getLong(LOCKOUT_ATTEMPT_DEADLINE, 0L); 1178 final long now = SystemClock.elapsedRealtime(); 1179 if (deadline < now || deadline > (now + FAILED_ATTEMPT_TIMEOUT_MS)) { 1180 return 0L; 1181 } 1182 return deadline; 1183 } 1184 1185 /** 1186 * @return Whether the user is permanently locked out until they verify their 1187 * credentials. Occurs after {@link #FAILED_ATTEMPTS_BEFORE_RESET} failed 1188 * attempts. 1189 */ 1190 public boolean isPermanentlyLocked() { 1191 return getBoolean(LOCKOUT_PERMANENT_KEY, false); 1192 } 1193 1194 /** 1195 * Set the state of whether the device is permanently locked, meaning the user 1196 * must authenticate via other means. 1197 * 1198 * @param locked Whether the user is permanently locked out until they verify their 1199 * credentials. Occurs after {@link #FAILED_ATTEMPTS_BEFORE_RESET} failed 1200 * attempts. 1201 */ 1202 public void setPermanentlyLocked(boolean locked) { 1203 setBoolean(LOCKOUT_PERMANENT_KEY, locked); 1204 } 1205 1206 public boolean isEmergencyCallCapable() { 1207 return mContext.getResources().getBoolean( 1208 com.android.internal.R.bool.config_voice_capable); 1209 } 1210 1211 public boolean isPukUnlockScreenEnable() { 1212 return mContext.getResources().getBoolean( 1213 com.android.internal.R.bool.config_enable_puk_unlock_screen); 1214 } 1215 1216 public boolean isEmergencyCallEnabledWhileSimLocked() { 1217 return mContext.getResources().getBoolean( 1218 com.android.internal.R.bool.config_enable_emergency_call_while_sim_locked); 1219 } 1220 1221 /** 1222 * @return A formatted string of the next alarm (for showing on the lock screen), 1223 * or null if there is no next alarm. 1224 */ 1225 public AlarmManager.AlarmClockInfo getNextAlarm() { 1226 AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(Context.ALARM_SERVICE); 1227 return alarmManager.getNextAlarmClock(UserHandle.USER_CURRENT); 1228 } 1229 1230 private boolean getBoolean(String secureSettingKey, boolean defaultValue, int userId) { 1231 try { 1232 return getLockSettings().getBoolean(secureSettingKey, defaultValue, userId); 1233 } catch (RemoteException re) { 1234 return defaultValue; 1235 } 1236 } 1237 1238 private boolean getBoolean(String secureSettingKey, boolean defaultValue) { 1239 return getBoolean(secureSettingKey, defaultValue, getCurrentOrCallingUserId()); 1240 } 1241 1242 private void setBoolean(String secureSettingKey, boolean enabled, int userId) { 1243 try { 1244 getLockSettings().setBoolean(secureSettingKey, enabled, userId); 1245 } catch (RemoteException re) { 1246 // What can we do? 1247 Log.e(TAG, "Couldn't write boolean " + secureSettingKey + re); 1248 } 1249 } 1250 1251 private void setBoolean(String secureSettingKey, boolean enabled) { 1252 setBoolean(secureSettingKey, enabled, getCurrentOrCallingUserId()); 1253 } 1254 1255 public int[] getAppWidgets() { 1256 return getAppWidgets(UserHandle.USER_CURRENT); 1257 } 1258 1259 private int[] getAppWidgets(int userId) { 1260 String appWidgetIdString = Settings.Secure.getStringForUser( 1261 mContentResolver, Settings.Secure.LOCK_SCREEN_APPWIDGET_IDS, userId); 1262 String delims = ","; 1263 if (appWidgetIdString != null && appWidgetIdString.length() > 0) { 1264 String[] appWidgetStringIds = appWidgetIdString.split(delims); 1265 int[] appWidgetIds = new int[appWidgetStringIds.length]; 1266 for (int i = 0; i < appWidgetStringIds.length; i++) { 1267 String appWidget = appWidgetStringIds[i]; 1268 try { 1269 appWidgetIds[i] = Integer.decode(appWidget); 1270 } catch (NumberFormatException e) { 1271 Log.d(TAG, "Error when parsing widget id " + appWidget); 1272 return null; 1273 } 1274 } 1275 return appWidgetIds; 1276 } 1277 return new int[0]; 1278 } 1279 1280 private static String combineStrings(int[] list, String separator) { 1281 int listLength = list.length; 1282 1283 switch (listLength) { 1284 case 0: { 1285 return ""; 1286 } 1287 case 1: { 1288 return Integer.toString(list[0]); 1289 } 1290 } 1291 1292 int strLength = 0; 1293 int separatorLength = separator.length(); 1294 1295 String[] stringList = new String[list.length]; 1296 for (int i = 0; i < listLength; i++) { 1297 stringList[i] = Integer.toString(list[i]); 1298 strLength += stringList[i].length(); 1299 if (i < listLength - 1) { 1300 strLength += separatorLength; 1301 } 1302 } 1303 1304 StringBuilder sb = new StringBuilder(strLength); 1305 1306 for (int i = 0; i < listLength; i++) { 1307 sb.append(list[i]); 1308 if (i < listLength - 1) { 1309 sb.append(separator); 1310 } 1311 } 1312 1313 return sb.toString(); 1314 } 1315 1316 // appwidget used when appwidgets are disabled (we make an exception for 1317 // default clock widget) 1318 public void writeFallbackAppWidgetId(int appWidgetId) { 1319 Settings.Secure.putIntForUser(mContentResolver, 1320 Settings.Secure.LOCK_SCREEN_FALLBACK_APPWIDGET_ID, 1321 appWidgetId, 1322 UserHandle.USER_CURRENT); 1323 } 1324 1325 // appwidget used when appwidgets are disabled (we make an exception for 1326 // default clock widget) 1327 public int getFallbackAppWidgetId() { 1328 return Settings.Secure.getIntForUser( 1329 mContentResolver, 1330 Settings.Secure.LOCK_SCREEN_FALLBACK_APPWIDGET_ID, 1331 AppWidgetManager.INVALID_APPWIDGET_ID, 1332 UserHandle.USER_CURRENT); 1333 } 1334 1335 private void writeAppWidgets(int[] appWidgetIds) { 1336 Settings.Secure.putStringForUser(mContentResolver, 1337 Settings.Secure.LOCK_SCREEN_APPWIDGET_IDS, 1338 combineStrings(appWidgetIds, ","), 1339 UserHandle.USER_CURRENT); 1340 } 1341 1342 // TODO: log an error if this returns false 1343 public boolean addAppWidget(int widgetId, int index) { 1344 int[] widgets = getAppWidgets(); 1345 if (widgets == null) { 1346 return false; 1347 } 1348 if (index < 0 || index > widgets.length) { 1349 return false; 1350 } 1351 int[] newWidgets = new int[widgets.length + 1]; 1352 for (int i = 0, j = 0; i < newWidgets.length; i++) { 1353 if (index == i) { 1354 newWidgets[i] = widgetId; 1355 i++; 1356 } 1357 if (i < newWidgets.length) { 1358 newWidgets[i] = widgets[j]; 1359 j++; 1360 } 1361 } 1362 writeAppWidgets(newWidgets); 1363 return true; 1364 } 1365 1366 public boolean removeAppWidget(int widgetId) { 1367 int[] widgets = getAppWidgets(); 1368 1369 if (widgets.length == 0) { 1370 return false; 1371 } 1372 1373 int[] newWidgets = new int[widgets.length - 1]; 1374 for (int i = 0, j = 0; i < widgets.length; i++) { 1375 if (widgets[i] == widgetId) { 1376 // continue... 1377 } else if (j >= newWidgets.length) { 1378 // we couldn't find the widget 1379 return false; 1380 } else { 1381 newWidgets[j] = widgets[i]; 1382 j++; 1383 } 1384 } 1385 writeAppWidgets(newWidgets); 1386 return true; 1387 } 1388 1389 private long getLong(String secureSettingKey, long defaultValue, int userHandle) { 1390 try { 1391 return getLockSettings().getLong(secureSettingKey, defaultValue, userHandle); 1392 } catch (RemoteException re) { 1393 return defaultValue; 1394 } 1395 } 1396 1397 private long getLong(String secureSettingKey, long defaultValue) { 1398 try { 1399 return getLockSettings().getLong(secureSettingKey, defaultValue, 1400 getCurrentOrCallingUserId()); 1401 } catch (RemoteException re) { 1402 return defaultValue; 1403 } 1404 } 1405 1406 private void setLong(String secureSettingKey, long value) { 1407 setLong(secureSettingKey, value, getCurrentOrCallingUserId()); 1408 } 1409 1410 private void setLong(String secureSettingKey, long value, int userHandle) { 1411 try { 1412 getLockSettings().setLong(secureSettingKey, value, userHandle); 1413 } catch (RemoteException re) { 1414 // What can we do? 1415 Log.e(TAG, "Couldn't write long " + secureSettingKey + re); 1416 } 1417 } 1418 1419 private String getString(String secureSettingKey) { 1420 return getString(secureSettingKey, getCurrentOrCallingUserId()); 1421 } 1422 1423 private String getString(String secureSettingKey, int userHandle) { 1424 try { 1425 return getLockSettings().getString(secureSettingKey, null, userHandle); 1426 } catch (RemoteException re) { 1427 return null; 1428 } 1429 } 1430 1431 private void setString(String secureSettingKey, String value, int userHandle) { 1432 try { 1433 getLockSettings().setString(secureSettingKey, value, userHandle); 1434 } catch (RemoteException re) { 1435 // What can we do? 1436 Log.e(TAG, "Couldn't write string " + secureSettingKey + re); 1437 } 1438 } 1439 1440 public boolean isSecure() { 1441 long mode = getKeyguardStoredPasswordQuality(); 1442 final boolean isPattern = mode == DevicePolicyManager.PASSWORD_QUALITY_SOMETHING; 1443 final boolean isPassword = mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC 1444 || mode == DevicePolicyManager.PASSWORD_QUALITY_NUMERIC_COMPLEX 1445 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHABETIC 1446 || mode == DevicePolicyManager.PASSWORD_QUALITY_ALPHANUMERIC 1447 || mode == DevicePolicyManager.PASSWORD_QUALITY_COMPLEX; 1448 final boolean secure = isPattern && isLockPatternEnabled() && savedPatternExists() 1449 || isPassword && savedPasswordExists(); 1450 return secure; 1451 } 1452 1453 /** 1454 * Sets the emergency button visibility based on isEmergencyCallCapable(). 1455 * 1456 * If the emergency button is visible, sets the text on the emergency button 1457 * to indicate what action will be taken. 1458 * 1459 * If there's currently a call in progress, the button will take them to the call 1460 * @param button The button to update 1461 * @param shown Indicates whether the given screen wants the emergency button to show at all 1462 * @param showIcon Indicates whether to show a phone icon for the button. 1463 */ 1464 public void updateEmergencyCallButtonState(Button button, boolean shown, boolean showIcon) { 1465 if (isEmergencyCallCapable() && shown) { 1466 button.setVisibility(View.VISIBLE); 1467 } else { 1468 button.setVisibility(View.GONE); 1469 return; 1470 } 1471 1472 int textId; 1473 if (isInCall()) { 1474 // show "return to call" text and show phone icon 1475 textId = R.string.lockscreen_return_to_call; 1476 int phoneCallIcon = showIcon ? R.drawable.stat_sys_phone_call : 0; 1477 button.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0); 1478 } else { 1479 textId = R.string.lockscreen_emergency_call; 1480 int emergencyIcon = showIcon ? R.drawable.ic_emergency : 0; 1481 button.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0); 1482 } 1483 button.setText(textId); 1484 } 1485 1486 /** 1487 * Resumes a call in progress. Typically launched from the EmergencyCall button 1488 * on various lockscreens. 1489 */ 1490 public void resumeCall() { 1491 getTelecommManager().showInCallScreen(false); 1492 } 1493 1494 /** 1495 * @return {@code true} if there is a call currently in progress, {@code false} otherwise. 1496 */ 1497 public boolean isInCall() { 1498 return getTelecommManager().isInCall(); 1499 } 1500 1501 private TelecomManager getTelecommManager() { 1502 return (TelecomManager) mContext.getSystemService(Context.TELECOM_SERVICE); 1503 } 1504 1505 private void finishBiometricWeak() { 1506 setBoolean(BIOMETRIC_WEAK_EVER_CHOSEN_KEY, true); 1507 1508 // Launch intent to show final screen, this also 1509 // moves the temporary gallery to the actual gallery 1510 Intent intent = new Intent(); 1511 intent.setClassName("com.android.facelock", 1512 "com.android.facelock.SetupEndScreen"); 1513 mContext.startActivity(intent); 1514 } 1515 1516 public void setPowerButtonInstantlyLocks(boolean enabled) { 1517 setBoolean(LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, enabled); 1518 } 1519 1520 public boolean getPowerButtonInstantlyLocks() { 1521 return getBoolean(LOCKSCREEN_POWER_BUTTON_INSTANTLY_LOCKS, true); 1522 } 1523 1524 public static boolean isSafeModeEnabled() { 1525 try { 1526 return IWindowManager.Stub.asInterface( 1527 ServiceManager.getService("window")).isSafeModeEnabled(); 1528 } catch (RemoteException e) { 1529 // Shouldn't happen! 1530 } 1531 return false; 1532 } 1533 1534 /** 1535 * Determine whether the user has selected any non-system widgets in keyguard 1536 * 1537 * @return true if widgets have been selected 1538 */ 1539 public boolean hasWidgetsEnabledInKeyguard(int userid) { 1540 int widgets[] = getAppWidgets(userid); 1541 for (int i = 0; i < widgets.length; i++) { 1542 if (widgets[i] > 0) { 1543 return true; 1544 } 1545 } 1546 return false; 1547 } 1548 1549 public boolean getWidgetsEnabled() { 1550 return getWidgetsEnabled(getCurrentOrCallingUserId()); 1551 } 1552 1553 public boolean getWidgetsEnabled(int userId) { 1554 return getBoolean(LOCKSCREEN_WIDGETS_ENABLED, false, userId); 1555 } 1556 1557 public void setWidgetsEnabled(boolean enabled) { 1558 setWidgetsEnabled(enabled, getCurrentOrCallingUserId()); 1559 } 1560 1561 public void setWidgetsEnabled(boolean enabled, int userId) { 1562 setBoolean(LOCKSCREEN_WIDGETS_ENABLED, enabled, userId); 1563 } 1564 1565 public void setEnabledTrustAgents(Collection<ComponentName> activeTrustAgents) { 1566 setEnabledTrustAgents(activeTrustAgents, getCurrentOrCallingUserId()); 1567 } 1568 1569 public List<ComponentName> getEnabledTrustAgents() { 1570 return getEnabledTrustAgents(getCurrentOrCallingUserId()); 1571 } 1572 1573 public void setEnabledTrustAgents(Collection<ComponentName> activeTrustAgents, int userId) { 1574 StringBuilder sb = new StringBuilder(); 1575 for (ComponentName cn : activeTrustAgents) { 1576 if (sb.length() > 0) { 1577 sb.append(','); 1578 } 1579 sb.append(cn.flattenToShortString()); 1580 } 1581 setString(ENABLED_TRUST_AGENTS, sb.toString(), userId); 1582 getTrustManager().reportEnabledTrustAgentsChanged(getCurrentOrCallingUserId()); 1583 } 1584 1585 public List<ComponentName> getEnabledTrustAgents(int userId) { 1586 String serialized = getString(ENABLED_TRUST_AGENTS, userId); 1587 if (TextUtils.isEmpty(serialized)) { 1588 return null; 1589 } 1590 String[] split = serialized.split(","); 1591 ArrayList<ComponentName> activeTrustAgents = new ArrayList<ComponentName>(split.length); 1592 for (String s : split) { 1593 if (!TextUtils.isEmpty(s)) { 1594 activeTrustAgents.add(ComponentName.unflattenFromString(s)); 1595 } 1596 } 1597 return activeTrustAgents; 1598 } 1599 1600 /** 1601 * @see android.app.trust.TrustManager#reportRequireCredentialEntry(int) 1602 */ 1603 public void requireCredentialEntry(int userId) { 1604 getTrustManager().reportRequireCredentialEntry(userId); 1605 } 1606 1607 private void onAfterChangingPassword() { 1608 getTrustManager().reportEnabledTrustAgentsChanged(getCurrentOrCallingUserId()); 1609 } 1610} 1611