UserManagerService.java revision f6ee2244a4f4ddb1ddf2ae21a7e3acd6dab1880b
1/* 2 * Copyright (C) 2011 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.server.pm; 18 19import android.app.Activity; 20import android.app.ActivityManager; 21import android.app.ActivityManagerNative; 22import android.app.IStopUserCallback; 23import android.content.BroadcastReceiver; 24import android.content.Context; 25import android.content.Intent; 26import android.content.pm.ApplicationInfo; 27import android.content.pm.PackageManager; 28import android.content.pm.PackageManager.NameNotFoundException; 29import android.content.pm.UserInfo; 30import android.graphics.Bitmap; 31import android.os.Binder; 32import android.os.Bundle; 33import android.os.Environment; 34import android.os.FileUtils; 35import android.os.Handler; 36import android.os.IUserManager; 37import android.os.Message; 38import android.os.ParcelFileDescriptor; 39import android.os.Parcelable; 40import android.os.Process; 41import android.os.RemoteException; 42import android.os.ServiceManager; 43import android.os.UserHandle; 44import android.os.UserManager; 45import android.util.AtomicFile; 46import android.util.Log; 47import android.util.Slog; 48import android.util.SparseArray; 49import android.util.SparseBooleanArray; 50import android.util.TimeUtils; 51import android.util.Xml; 52 53import com.android.internal.annotations.VisibleForTesting; 54import com.android.internal.app.IAppOpsService; 55import com.android.internal.util.ArrayUtils; 56import com.android.internal.util.FastXmlSerializer; 57import com.android.internal.util.XmlUtils; 58 59import org.xmlpull.v1.XmlPullParser; 60import org.xmlpull.v1.XmlPullParserException; 61import org.xmlpull.v1.XmlSerializer; 62 63import java.io.BufferedOutputStream; 64import java.io.File; 65import java.io.FileDescriptor; 66import java.io.FileInputStream; 67import java.io.FileNotFoundException; 68import java.io.FileOutputStream; 69import java.io.IOException; 70import java.io.PrintWriter; 71import java.security.MessageDigest; 72import java.security.NoSuchAlgorithmException; 73import java.security.SecureRandom; 74import java.util.ArrayList; 75import java.util.List; 76 77import libcore.io.IoUtils; 78 79public class UserManagerService extends IUserManager.Stub { 80 81 private static final String LOG_TAG = "UserManagerService"; 82 83 private static final boolean DBG = false; 84 85 private static final String TAG_NAME = "name"; 86 private static final String ATTR_FLAGS = "flags"; 87 private static final String ATTR_ICON_PATH = "icon"; 88 private static final String ATTR_ID = "id"; 89 private static final String ATTR_CREATION_TIME = "created"; 90 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 91 private static final String ATTR_SALT = "salt"; 92 private static final String ATTR_PIN_HASH = "pinHash"; 93 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 94 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 95 private static final String ATTR_SERIAL_NO = "serialNumber"; 96 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 97 private static final String ATTR_PARTIAL = "partial"; 98 private static final String ATTR_GUEST_TO_REMOVE = "guestToRemove"; 99 private static final String ATTR_USER_VERSION = "version"; 100 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 101 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 102 private static final String TAG_USERS = "users"; 103 private static final String TAG_USER = "user"; 104 private static final String TAG_RESTRICTIONS = "restrictions"; 105 private static final String TAG_ENTRY = "entry"; 106 private static final String TAG_VALUE = "value"; 107 private static final String ATTR_KEY = "key"; 108 private static final String ATTR_VALUE_TYPE = "type"; 109 private static final String ATTR_MULTIPLE = "m"; 110 111 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 112 private static final String ATTR_TYPE_STRING = "s"; 113 private static final String ATTR_TYPE_BOOLEAN = "b"; 114 private static final String ATTR_TYPE_INTEGER = "i"; 115 private static final String ATTR_TYPE_BUNDLE = "B"; 116 private static final String ATTR_TYPE_BUNDLE_ARRAY = "BA"; 117 118 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 119 private static final String USER_LIST_FILENAME = "userlist.xml"; 120 private static final String USER_PHOTO_FILENAME = "photo.png"; 121 private static final String USER_PHOTO_FILENAME_TMP = USER_PHOTO_FILENAME + ".tmp"; 122 123 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 124 private static final String XML_SUFFIX = ".xml"; 125 126 private static final int MIN_USER_ID = 10; 127 128 private static final int USER_VERSION = 5; 129 130 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 131 132 // Number of attempts before jumping to the next BACKOFF_TIMES slot 133 private static final int BACKOFF_INC_INTERVAL = 5; 134 135 // Maximum number of managed profiles permitted is 1. This cannot be increased 136 // without first making sure that the rest of the framework is prepared for it. 137 private static final int MAX_MANAGED_PROFILES = 1; 138 139 // Amount of time to force the user to wait before entering the PIN again, after failing 140 // BACKOFF_INC_INTERVAL times. 141 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 142 143 static final int WRITE_USER_MSG = 1; 144 static final int WRITE_USER_DELAY = 2*1000; // 2 seconds 145 146 private final Context mContext; 147 private final PackageManagerService mPm; 148 private final Object mInstallLock; 149 private final Object mPackagesLock; 150 151 private final Handler mHandler; 152 153 private final File mUsersDir; 154 private final File mUserListFile; 155 private final File mBaseUserPath; 156 157 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 158 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 159 private final Bundle mGuestRestrictions = new Bundle(); 160 161 class RestrictionsPinState { 162 long salt; 163 String pinHash; 164 int failedAttempts; 165 long lastAttemptTime; 166 } 167 168 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 169 new SparseArray<RestrictionsPinState>(); 170 171 /** 172 * Set of user IDs being actively removed. Removed IDs linger in this set 173 * for several seconds to work around a VFS caching issue. 174 */ 175 // @GuardedBy("mPackagesLock") 176 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 177 178 private int[] mUserIds; 179 private int mNextSerialNumber; 180 private int mUserVersion = 0; 181 182 private IAppOpsService mAppOpsService; 183 184 private static UserManagerService sInstance; 185 186 public static UserManagerService getInstance() { 187 synchronized (UserManagerService.class) { 188 return sInstance; 189 } 190 } 191 192 /** 193 * Available for testing purposes. 194 */ 195 UserManagerService(File dataDir, File baseUserPath) { 196 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 197 } 198 199 /** 200 * Called by package manager to create the service. This is closely 201 * associated with the package manager, and the given lock is the 202 * package manager's own lock. 203 */ 204 UserManagerService(Context context, PackageManagerService pm, 205 Object installLock, Object packagesLock) { 206 this(context, pm, installLock, packagesLock, 207 Environment.getDataDirectory(), 208 new File(Environment.getDataDirectory(), "user")); 209 } 210 211 /** 212 * Available for testing purposes. 213 */ 214 private UserManagerService(Context context, PackageManagerService pm, 215 Object installLock, Object packagesLock, 216 File dataDir, File baseUserPath) { 217 mContext = context; 218 mPm = pm; 219 mInstallLock = installLock; 220 mPackagesLock = packagesLock; 221 mHandler = new MainHandler(); 222 synchronized (mInstallLock) { 223 synchronized (mPackagesLock) { 224 mUsersDir = new File(dataDir, USER_INFO_DIR); 225 mUsersDir.mkdirs(); 226 // Make zeroth user directory, for services to migrate their files to that location 227 File userZeroDir = new File(mUsersDir, "0"); 228 userZeroDir.mkdirs(); 229 mBaseUserPath = baseUserPath; 230 FileUtils.setPermissions(mUsersDir.toString(), 231 FileUtils.S_IRWXU|FileUtils.S_IRWXG 232 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 233 -1, -1); 234 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 235 initDefaultGuestRestrictions(); 236 readUserListLocked(); 237 // Prune out any partially created/partially removed users. 238 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 239 for (int i = 0; i < mUsers.size(); i++) { 240 UserInfo ui = mUsers.valueAt(i); 241 if ((ui.partial || ui.guestToRemove) && i != 0) { 242 partials.add(ui); 243 } 244 } 245 for (int i = 0; i < partials.size(); i++) { 246 UserInfo ui = partials.get(i); 247 Slog.w(LOG_TAG, "Removing partially created user #" + i 248 + " (name=" + ui.name + ")"); 249 removeUserStateLocked(ui.id); 250 } 251 sInstance = this; 252 } 253 } 254 } 255 256 void systemReady() { 257 userForeground(UserHandle.USER_OWNER); 258 mAppOpsService = IAppOpsService.Stub.asInterface( 259 ServiceManager.getService(Context.APP_OPS_SERVICE)); 260 for (int i = 0; i < mUserIds.length; ++i) { 261 try { 262 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 263 } catch (RemoteException e) { 264 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 265 } 266 } 267 } 268 269 @Override 270 public List<UserInfo> getUsers(boolean excludeDying) { 271 checkManageUsersPermission("query users"); 272 synchronized (mPackagesLock) { 273 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 274 for (int i = 0; i < mUsers.size(); i++) { 275 UserInfo ui = mUsers.valueAt(i); 276 if (ui.partial) { 277 continue; 278 } 279 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 280 users.add(ui); 281 } 282 } 283 return users; 284 } 285 } 286 287 @Override 288 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 289 if (userId != UserHandle.getCallingUserId()) { 290 checkManageUsersPermission("getting profiles related to user " + userId); 291 } 292 final long ident = Binder.clearCallingIdentity(); 293 try { 294 synchronized (mPackagesLock) { 295 return getProfilesLocked(userId, enabledOnly); 296 } 297 } finally { 298 Binder.restoreCallingIdentity(ident); 299 } 300 } 301 302 /** Assume permissions already checked and caller's identity cleared */ 303 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 304 UserInfo user = getUserInfoLocked(userId); 305 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 306 if (user == null) { 307 // Probably a dying user 308 return users; 309 } 310 for (int i = 0; i < mUsers.size(); i++) { 311 UserInfo profile = mUsers.valueAt(i); 312 if (!isProfileOf(user, profile)) { 313 continue; 314 } 315 if (enabledOnly && !profile.isEnabled()) { 316 continue; 317 } 318 if (mRemovingUserIds.get(profile.id)) { 319 continue; 320 } 321 users.add(profile); 322 } 323 return users; 324 } 325 326 @Override 327 public UserInfo getProfileParent(int userHandle) { 328 checkManageUsersPermission("get the profile parent"); 329 synchronized (mPackagesLock) { 330 UserInfo profile = getUserInfoLocked(userHandle); 331 if (profile == null) { 332 return null; 333 } 334 int parentUserId = profile.profileGroupId; 335 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 336 return null; 337 } else { 338 return getUserInfoLocked(parentUserId); 339 } 340 } 341 } 342 343 private boolean isProfileOf(UserInfo user, UserInfo profile) { 344 return user.id == profile.id || 345 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 346 && user.profileGroupId == profile.profileGroupId); 347 } 348 349 @Override 350 public void setUserEnabled(int userId) { 351 checkManageUsersPermission("enable user"); 352 synchronized (mPackagesLock) { 353 UserInfo info = getUserInfoLocked(userId); 354 if (info != null && !info.isEnabled()) { 355 info.flags ^= UserInfo.FLAG_DISABLED; 356 writeUserLocked(info); 357 } 358 } 359 } 360 361 @Override 362 public UserInfo getUserInfo(int userId) { 363 checkManageUsersPermission("query user"); 364 synchronized (mPackagesLock) { 365 return getUserInfoLocked(userId); 366 } 367 } 368 369 @Override 370 public boolean isRestricted() { 371 synchronized (mPackagesLock) { 372 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 373 } 374 } 375 376 /* 377 * Should be locked on mUsers before calling this. 378 */ 379 private UserInfo getUserInfoLocked(int userId) { 380 UserInfo ui = mUsers.get(userId); 381 // If it is partial and not in the process of being removed, return as unknown user. 382 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 383 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 384 return null; 385 } 386 return ui; 387 } 388 389 public boolean exists(int userId) { 390 synchronized (mPackagesLock) { 391 return ArrayUtils.contains(mUserIds, userId); 392 } 393 } 394 395 @Override 396 public void setUserName(int userId, String name) { 397 checkManageUsersPermission("rename users"); 398 boolean changed = false; 399 synchronized (mPackagesLock) { 400 UserInfo info = mUsers.get(userId); 401 if (info == null || info.partial) { 402 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 403 return; 404 } 405 if (name != null && !name.equals(info.name)) { 406 info.name = name; 407 writeUserLocked(info); 408 changed = true; 409 } 410 } 411 if (changed) { 412 sendUserInfoChangedBroadcast(userId); 413 } 414 } 415 416 @Override 417 public void setUserIcon(int userId, Bitmap bitmap) { 418 checkManageUsersPermission("update users"); 419 long ident = Binder.clearCallingIdentity(); 420 try { 421 synchronized (mPackagesLock) { 422 UserInfo info = mUsers.get(userId); 423 if (info == null || info.partial) { 424 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 425 return; 426 } 427 writeBitmapLocked(info, bitmap); 428 writeUserLocked(info); 429 } 430 sendUserInfoChangedBroadcast(userId); 431 } finally { 432 Binder.restoreCallingIdentity(ident); 433 } 434 } 435 436 private void sendUserInfoChangedBroadcast(int userId) { 437 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 438 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 439 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 440 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 441 } 442 443 @Override 444 public ParcelFileDescriptor getUserIcon(int userId) { 445 String iconPath; 446 synchronized (mPackagesLock) { 447 UserInfo info = mUsers.get(userId); 448 if (info == null || info.partial) { 449 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 450 return null; 451 } 452 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 453 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 454 || callingGroupId != info.profileGroupId) { 455 checkManageUsersPermission("get the icon of a user who is not related"); 456 } 457 if (info.iconPath == null) { 458 return null; 459 } 460 iconPath = info.iconPath; 461 } 462 463 try { 464 return ParcelFileDescriptor.open( 465 new File(iconPath), ParcelFileDescriptor.MODE_READ_ONLY); 466 } catch (FileNotFoundException e) { 467 Log.e(LOG_TAG, "Couldn't find icon file", e); 468 } 469 return null; 470 } 471 472 public void makeInitialized(int userId) { 473 checkManageUsersPermission("makeInitialized"); 474 synchronized (mPackagesLock) { 475 UserInfo info = mUsers.get(userId); 476 if (info == null || info.partial) { 477 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 478 } 479 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 480 info.flags |= UserInfo.FLAG_INITIALIZED; 481 scheduleWriteUserLocked(info); 482 } 483 } 484 } 485 486 /** 487 * If default guest restrictions haven't been initialized yet, add the basic 488 * restrictions. 489 */ 490 private void initDefaultGuestRestrictions() { 491 if (mGuestRestrictions.isEmpty()) { 492 mGuestRestrictions.putBoolean(UserManager.DISALLOW_OUTGOING_CALLS, true); 493 mGuestRestrictions.putBoolean(UserManager.DISALLOW_SMS, true); 494 } 495 } 496 497 @Override 498 public Bundle getDefaultGuestRestrictions() { 499 checkManageUsersPermission("getDefaultGuestRestrictions"); 500 synchronized (mPackagesLock) { 501 return new Bundle(mGuestRestrictions); 502 } 503 } 504 505 @Override 506 public void setDefaultGuestRestrictions(Bundle restrictions) { 507 checkManageUsersPermission("setDefaultGuestRestrictions"); 508 synchronized (mPackagesLock) { 509 mGuestRestrictions.clear(); 510 mGuestRestrictions.putAll(restrictions); 511 writeUserListLocked(); 512 } 513 } 514 515 @Override 516 public boolean hasUserRestriction(String restrictionKey, int userId) { 517 synchronized (mPackagesLock) { 518 Bundle restrictions = mUserRestrictions.get(userId); 519 return restrictions != null ? restrictions.getBoolean(restrictionKey) : false; 520 } 521 } 522 523 @Override 524 public Bundle getUserRestrictions(int userId) { 525 // checkManageUsersPermission("getUserRestrictions"); 526 527 synchronized (mPackagesLock) { 528 Bundle restrictions = mUserRestrictions.get(userId); 529 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 530 } 531 } 532 533 @Override 534 public void setUserRestrictions(Bundle restrictions, int userId) { 535 checkManageUsersPermission("setUserRestrictions"); 536 if (restrictions == null) return; 537 538 synchronized (mPackagesLock) { 539 mUserRestrictions.get(userId).clear(); 540 mUserRestrictions.get(userId).putAll(restrictions); 541 long token = Binder.clearCallingIdentity(); 542 try { 543 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 544 } catch (RemoteException e) { 545 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 546 } finally { 547 Binder.restoreCallingIdentity(token); 548 } 549 scheduleWriteUserLocked(mUsers.get(userId)); 550 } 551 } 552 553 /** 554 * Check if we've hit the limit of how many users can be created. 555 */ 556 private boolean isUserLimitReachedLocked() { 557 int aliveUserCount = 0; 558 final int totalUserCount = mUsers.size(); 559 // Skip over users being removed 560 for (int i = 0; i < totalUserCount; i++) { 561 UserInfo user = mUsers.valueAt(i); 562 if (!mRemovingUserIds.get(user.id) 563 && !user.isGuest() && !user.partial) { 564 aliveUserCount++; 565 } 566 } 567 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 568 } 569 570 /** 571 * Enforces that only the system UID or root's UID or apps that have the 572 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 573 * permission can make certain calls to the UserManager. 574 * 575 * @param message used as message if SecurityException is thrown 576 * @throws SecurityException if the caller is not system or root 577 */ 578 private static final void checkManageUsersPermission(String message) { 579 final int uid = Binder.getCallingUid(); 580 if (uid != Process.SYSTEM_UID && uid != 0 581 && ActivityManager.checkComponentPermission( 582 android.Manifest.permission.MANAGE_USERS, 583 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 584 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 585 } 586 } 587 588 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 589 try { 590 File dir = new File(mUsersDir, Integer.toString(info.id)); 591 File file = new File(dir, USER_PHOTO_FILENAME); 592 File tmp = new File(dir, USER_PHOTO_FILENAME_TMP); 593 if (!dir.exists()) { 594 dir.mkdir(); 595 FileUtils.setPermissions( 596 dir.getPath(), 597 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 598 -1, -1); 599 } 600 FileOutputStream os; 601 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(tmp)) 602 && tmp.renameTo(file)) { 603 info.iconPath = file.getAbsolutePath(); 604 } 605 try { 606 os.close(); 607 } catch (IOException ioe) { 608 // What the ... ! 609 } 610 tmp.delete(); 611 } catch (FileNotFoundException e) { 612 Slog.w(LOG_TAG, "Error setting photo for user ", e); 613 } 614 } 615 616 /** 617 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 618 * cache it elsewhere. 619 * @return the array of user ids. 620 */ 621 public int[] getUserIds() { 622 synchronized (mPackagesLock) { 623 return mUserIds; 624 } 625 } 626 627 int[] getUserIdsLPr() { 628 return mUserIds; 629 } 630 631 private void readUserListLocked() { 632 if (!mUserListFile.exists()) { 633 fallbackToSingleUserLocked(); 634 return; 635 } 636 FileInputStream fis = null; 637 AtomicFile userListFile = new AtomicFile(mUserListFile); 638 try { 639 fis = userListFile.openRead(); 640 XmlPullParser parser = Xml.newPullParser(); 641 parser.setInput(fis, null); 642 int type; 643 while ((type = parser.next()) != XmlPullParser.START_TAG 644 && type != XmlPullParser.END_DOCUMENT) { 645 ; 646 } 647 648 if (type != XmlPullParser.START_TAG) { 649 Slog.e(LOG_TAG, "Unable to read user list"); 650 fallbackToSingleUserLocked(); 651 return; 652 } 653 654 mNextSerialNumber = -1; 655 if (parser.getName().equals(TAG_USERS)) { 656 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 657 if (lastSerialNumber != null) { 658 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 659 } 660 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 661 if (versionNumber != null) { 662 mUserVersion = Integer.parseInt(versionNumber); 663 } 664 } 665 666 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 667 if (type == XmlPullParser.START_TAG) { 668 final String name = parser.getName(); 669 if (name.equals(TAG_USER)) { 670 String id = parser.getAttributeValue(null, ATTR_ID); 671 UserInfo user = readUserLocked(Integer.parseInt(id)); 672 673 if (user != null) { 674 mUsers.put(user.id, user); 675 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 676 mNextSerialNumber = user.id + 1; 677 } 678 } 679 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 680 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 681 && type != XmlPullParser.END_TAG) { 682 if (type == XmlPullParser.START_TAG) { 683 if (parser.getName().equals(TAG_RESTRICTIONS)) { 684 readRestrictionsLocked(parser, mGuestRestrictions); 685 } 686 break; 687 } 688 } 689 } 690 } 691 } 692 updateUserIdsLocked(); 693 upgradeIfNecessaryLocked(); 694 } catch (IOException ioe) { 695 fallbackToSingleUserLocked(); 696 } catch (XmlPullParserException pe) { 697 fallbackToSingleUserLocked(); 698 } finally { 699 if (fis != null) { 700 try { 701 fis.close(); 702 } catch (IOException e) { 703 } 704 } 705 } 706 } 707 708 /** 709 * Upgrade steps between versions, either for fixing bugs or changing the data format. 710 */ 711 private void upgradeIfNecessaryLocked() { 712 int userVersion = mUserVersion; 713 if (userVersion < 1) { 714 // Assign a proper name for the owner, if not initialized correctly before 715 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 716 if ("Primary".equals(user.name)) { 717 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 718 scheduleWriteUserLocked(user); 719 } 720 userVersion = 1; 721 } 722 723 if (userVersion < 2) { 724 // Owner should be marked as initialized 725 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 726 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 727 user.flags |= UserInfo.FLAG_INITIALIZED; 728 scheduleWriteUserLocked(user); 729 } 730 userVersion = 2; 731 } 732 733 734 if (userVersion < 4) { 735 userVersion = 4; 736 } 737 738 if (userVersion < 5) { 739 initDefaultGuestRestrictions(); 740 userVersion = 5; 741 } 742 743 if (userVersion < USER_VERSION) { 744 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 745 + USER_VERSION); 746 } else { 747 mUserVersion = userVersion; 748 writeUserListLocked(); 749 } 750 } 751 752 private void fallbackToSingleUserLocked() { 753 // Create the primary user 754 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 755 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 756 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 757 mUsers.put(0, primary); 758 mNextSerialNumber = MIN_USER_ID; 759 mUserVersion = USER_VERSION; 760 761 Bundle restrictions = new Bundle(); 762 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 763 764 updateUserIdsLocked(); 765 initDefaultGuestRestrictions(); 766 767 writeUserListLocked(); 768 writeUserLocked(primary); 769 } 770 771 private void scheduleWriteUserLocked(UserInfo userInfo) { 772 if (!mHandler.hasMessages(WRITE_USER_MSG, userInfo)) { 773 Message msg = mHandler.obtainMessage(WRITE_USER_MSG, userInfo); 774 mHandler.sendMessageDelayed(msg, WRITE_USER_DELAY); 775 } 776 } 777 778 /* 779 * Writes the user file in this format: 780 * 781 * <user flags="20039023" id="0"> 782 * <name>Primary</name> 783 * </user> 784 */ 785 private void writeUserLocked(UserInfo userInfo) { 786 FileOutputStream fos = null; 787 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 788 try { 789 fos = userFile.startWrite(); 790 final BufferedOutputStream bos = new BufferedOutputStream(fos); 791 792 // XmlSerializer serializer = XmlUtils.serializerInstance(); 793 final XmlSerializer serializer = new FastXmlSerializer(); 794 serializer.setOutput(bos, "utf-8"); 795 serializer.startDocument(null, true); 796 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 797 798 serializer.startTag(null, TAG_USER); 799 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 800 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 801 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 802 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 803 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 804 Long.toString(userInfo.lastLoggedInTime)); 805 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 806 if (pinState != null) { 807 if (pinState.salt != 0) { 808 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 809 } 810 if (pinState.pinHash != null) { 811 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 812 } 813 if (pinState.failedAttempts != 0) { 814 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 815 Integer.toString(pinState.failedAttempts)); 816 serializer.attribute(null, ATTR_LAST_RETRY_MS, 817 Long.toString(pinState.lastAttemptTime)); 818 } 819 } 820 if (userInfo.iconPath != null) { 821 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 822 } 823 if (userInfo.partial) { 824 serializer.attribute(null, ATTR_PARTIAL, "true"); 825 } 826 if (userInfo.guestToRemove) { 827 serializer.attribute(null, ATTR_GUEST_TO_REMOVE, "true"); 828 } 829 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 830 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 831 Integer.toString(userInfo.profileGroupId)); 832 } 833 834 serializer.startTag(null, TAG_NAME); 835 serializer.text(userInfo.name); 836 serializer.endTag(null, TAG_NAME); 837 Bundle restrictions = mUserRestrictions.get(userInfo.id); 838 if (restrictions != null) { 839 writeRestrictionsLocked(serializer, restrictions); 840 } 841 serializer.endTag(null, TAG_USER); 842 843 serializer.endDocument(); 844 userFile.finishWrite(fos); 845 } catch (Exception ioe) { 846 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 847 userFile.failWrite(fos); 848 } 849 } 850 851 /* 852 * Writes the user list file in this format: 853 * 854 * <users nextSerialNumber="3"> 855 * <user id="0"></user> 856 * <user id="2"></user> 857 * </users> 858 */ 859 private void writeUserListLocked() { 860 FileOutputStream fos = null; 861 AtomicFile userListFile = new AtomicFile(mUserListFile); 862 try { 863 fos = userListFile.startWrite(); 864 final BufferedOutputStream bos = new BufferedOutputStream(fos); 865 866 // XmlSerializer serializer = XmlUtils.serializerInstance(); 867 final XmlSerializer serializer = new FastXmlSerializer(); 868 serializer.setOutput(bos, "utf-8"); 869 serializer.startDocument(null, true); 870 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 871 872 serializer.startTag(null, TAG_USERS); 873 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 874 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 875 876 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 877 writeRestrictionsLocked(serializer, mGuestRestrictions); 878 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 879 for (int i = 0; i < mUsers.size(); i++) { 880 UserInfo user = mUsers.valueAt(i); 881 serializer.startTag(null, TAG_USER); 882 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 883 serializer.endTag(null, TAG_USER); 884 } 885 886 serializer.endTag(null, TAG_USERS); 887 888 serializer.endDocument(); 889 userListFile.finishWrite(fos); 890 } catch (Exception e) { 891 userListFile.failWrite(fos); 892 Slog.e(LOG_TAG, "Error writing user list"); 893 } 894 } 895 896 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 897 throws IOException { 898 serializer.startTag(null, TAG_RESTRICTIONS); 899 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 900 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 901 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 902 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 903 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 904 writeBoolean(serializer, restrictions, 905 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 906 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 907 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 908 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 909 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 910 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 911 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 912 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 913 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 914 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 915 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 916 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 917 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 918 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 919 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 920 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 921 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 922 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 923 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SMS); 924 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 925 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 926 writeBoolean(serializer, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 927 writeBoolean(serializer, restrictions, UserManager.DISALLOW_WALLPAPER); 928 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SAFE_BOOT); 929 serializer.endTag(null, TAG_RESTRICTIONS); 930 } 931 932 private UserInfo readUserLocked(int id) { 933 int flags = 0; 934 int serialNumber = id; 935 String name = null; 936 String iconPath = null; 937 long creationTime = 0L; 938 long lastLoggedInTime = 0L; 939 long salt = 0L; 940 String pinHash = null; 941 int failedAttempts = 0; 942 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 943 long lastAttemptTime = 0L; 944 boolean partial = false; 945 boolean guestToRemove = false; 946 Bundle restrictions = new Bundle(); 947 948 FileInputStream fis = null; 949 try { 950 AtomicFile userFile = 951 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 952 fis = userFile.openRead(); 953 XmlPullParser parser = Xml.newPullParser(); 954 parser.setInput(fis, null); 955 int type; 956 while ((type = parser.next()) != XmlPullParser.START_TAG 957 && type != XmlPullParser.END_DOCUMENT) { 958 ; 959 } 960 961 if (type != XmlPullParser.START_TAG) { 962 Slog.e(LOG_TAG, "Unable to read user " + id); 963 return null; 964 } 965 966 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 967 int storedId = readIntAttribute(parser, ATTR_ID, -1); 968 if (storedId != id) { 969 Slog.e(LOG_TAG, "User id does not match the file name"); 970 return null; 971 } 972 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 973 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 974 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 975 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 976 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 977 salt = readLongAttribute(parser, ATTR_SALT, 0L); 978 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 979 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 980 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 981 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 982 UserInfo.NO_PROFILE_GROUP_ID); 983 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 984 if ("true".equals(valueString)) { 985 partial = true; 986 } 987 valueString = parser.getAttributeValue(null, ATTR_GUEST_TO_REMOVE); 988 if ("true".equals(valueString)) { 989 guestToRemove = true; 990 } 991 992 int outerDepth = parser.getDepth(); 993 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 994 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 995 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 996 continue; 997 } 998 String tag = parser.getName(); 999 if (TAG_NAME.equals(tag)) { 1000 type = parser.next(); 1001 if (type == XmlPullParser.TEXT) { 1002 name = parser.getText(); 1003 } 1004 } else if (TAG_RESTRICTIONS.equals(tag)) { 1005 readRestrictionsLocked(parser, restrictions); 1006 } 1007 } 1008 } 1009 1010 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 1011 userInfo.serialNumber = serialNumber; 1012 userInfo.creationTime = creationTime; 1013 userInfo.lastLoggedInTime = lastLoggedInTime; 1014 userInfo.partial = partial; 1015 userInfo.guestToRemove = guestToRemove; 1016 userInfo.profileGroupId = profileGroupId; 1017 mUserRestrictions.append(id, restrictions); 1018 if (salt != 0L) { 1019 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 1020 if (pinState == null) { 1021 pinState = new RestrictionsPinState(); 1022 mRestrictionsPinStates.put(id, pinState); 1023 } 1024 pinState.salt = salt; 1025 pinState.pinHash = pinHash; 1026 pinState.failedAttempts = failedAttempts; 1027 pinState.lastAttemptTime = lastAttemptTime; 1028 } 1029 return userInfo; 1030 1031 } catch (IOException ioe) { 1032 } catch (XmlPullParserException pe) { 1033 } finally { 1034 if (fis != null) { 1035 try { 1036 fis.close(); 1037 } catch (IOException e) { 1038 } 1039 } 1040 } 1041 return null; 1042 } 1043 1044 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 1045 throws IOException { 1046 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 1047 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 1048 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 1049 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 1050 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 1051 readBoolean(parser, restrictions, 1052 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 1053 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 1054 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 1055 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 1056 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 1057 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 1058 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 1059 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 1060 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 1061 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 1062 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 1063 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 1064 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 1065 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 1066 readBoolean(parser, restrictions, 1067 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 1068 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 1069 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 1070 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_CALLS); 1071 readBoolean(parser, restrictions, UserManager.DISALLOW_SMS); 1072 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 1073 readBoolean(parser, restrictions, UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE); 1074 readBoolean(parser, restrictions, UserManager.DISALLOW_OUTGOING_BEAM); 1075 readBoolean(parser, restrictions, UserManager.DISALLOW_WALLPAPER); 1076 readBoolean(parser, restrictions, UserManager.DISALLOW_SAFE_BOOT); 1077 } 1078 1079 private void readBoolean(XmlPullParser parser, Bundle restrictions, 1080 String restrictionKey) { 1081 String value = parser.getAttributeValue(null, restrictionKey); 1082 if (value != null) { 1083 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 1084 } 1085 } 1086 1087 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1088 throws IOException { 1089 if (restrictions.containsKey(restrictionKey)) { 1090 xml.attribute(null, restrictionKey, 1091 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1092 } 1093 } 1094 1095 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1096 String valueString = parser.getAttributeValue(null, attr); 1097 if (valueString == null) return defaultValue; 1098 try { 1099 return Integer.parseInt(valueString); 1100 } catch (NumberFormatException nfe) { 1101 return defaultValue; 1102 } 1103 } 1104 1105 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1106 String valueString = parser.getAttributeValue(null, attr); 1107 if (valueString == null) return defaultValue; 1108 try { 1109 return Long.parseLong(valueString); 1110 } catch (NumberFormatException nfe) { 1111 return defaultValue; 1112 } 1113 } 1114 1115 private boolean isPackageInstalled(String pkg, int userId) { 1116 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1117 PackageManager.GET_UNINSTALLED_PACKAGES, 1118 userId); 1119 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1120 return false; 1121 } 1122 return true; 1123 } 1124 1125 /** 1126 * Removes all the restrictions files (res_<packagename>) for a given user. 1127 * Does not do any permissions checking. 1128 */ 1129 private void cleanAppRestrictions(int userId) { 1130 synchronized (mPackagesLock) { 1131 File dir = Environment.getUserSystemDirectory(userId); 1132 String[] files = dir.list(); 1133 if (files == null) return; 1134 for (String fileName : files) { 1135 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1136 File resFile = new File(dir, fileName); 1137 if (resFile.exists()) { 1138 resFile.delete(); 1139 } 1140 } 1141 } 1142 } 1143 } 1144 1145 /** 1146 * Removes the app restrictions file for a specific package and user id, if it exists. 1147 */ 1148 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1149 synchronized (mPackagesLock) { 1150 File dir = Environment.getUserSystemDirectory(userId); 1151 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1152 if (resFile.exists()) { 1153 resFile.delete(); 1154 } 1155 } 1156 } 1157 1158 @Override 1159 public UserInfo createProfileForUser(String name, int flags, int userId) { 1160 checkManageUsersPermission("Only the system can create users"); 1161 if (userId != UserHandle.USER_OWNER) { 1162 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1163 return null; 1164 } 1165 return createUserInternal(name, flags, userId); 1166 } 1167 1168 @Override 1169 public UserInfo createUser(String name, int flags) { 1170 checkManageUsersPermission("Only the system can create users"); 1171 return createUserInternal(name, flags, UserHandle.USER_NULL); 1172 } 1173 1174 private UserInfo createUserInternal(String name, int flags, int parentId) { 1175 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1176 UserManager.DISALLOW_ADD_USER, false)) { 1177 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1178 return null; 1179 } 1180 final boolean isGuest = (flags & UserInfo.FLAG_GUEST) != 0; 1181 final long ident = Binder.clearCallingIdentity(); 1182 UserInfo userInfo = null; 1183 try { 1184 synchronized (mInstallLock) { 1185 synchronized (mPackagesLock) { 1186 UserInfo parent = null; 1187 if (parentId != UserHandle.USER_NULL) { 1188 parent = getUserInfoLocked(parentId); 1189 if (parent == null) return null; 1190 } 1191 // If we're not adding a guest user and the limit has been reached, 1192 // cannot add a user. 1193 if (!isGuest && isUserLimitReachedLocked()) { 1194 return null; 1195 } 1196 // If we're adding a guest and there already exists one, bail. 1197 if (isGuest && findCurrentGuestUserLocked() != null) { 1198 return null; 1199 } 1200 // Limit number of managed profiles that can be created 1201 if ((flags & UserInfo.FLAG_MANAGED_PROFILE) != 0 1202 && numberOfUsersOfTypeLocked(UserInfo.FLAG_MANAGED_PROFILE, true) 1203 >= MAX_MANAGED_PROFILES) { 1204 return null; 1205 } 1206 int userId = getNextAvailableIdLocked(); 1207 userInfo = new UserInfo(userId, name, null, flags); 1208 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1209 userInfo.serialNumber = mNextSerialNumber++; 1210 long now = System.currentTimeMillis(); 1211 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1212 userInfo.partial = true; 1213 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1214 mUsers.put(userId, userInfo); 1215 writeUserListLocked(); 1216 if (parent != null) { 1217 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1218 parent.profileGroupId = parent.id; 1219 scheduleWriteUserLocked(parent); 1220 } 1221 userInfo.profileGroupId = parent.profileGroupId; 1222 } 1223 mPm.createNewUserLILPw(userId, userPath); 1224 userInfo.partial = false; 1225 scheduleWriteUserLocked(userInfo); 1226 updateUserIdsLocked(); 1227 Bundle restrictions = new Bundle(); 1228 mUserRestrictions.append(userId, restrictions); 1229 mPm.newUserCreatedLILPw(userId); 1230 } 1231 } 1232 if (userInfo != null) { 1233 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1234 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1235 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1236 android.Manifest.permission.MANAGE_USERS); 1237 } 1238 } finally { 1239 Binder.restoreCallingIdentity(ident); 1240 } 1241 return userInfo; 1242 } 1243 1244 private int numberOfUsersOfTypeLocked(int flags, boolean excludeDying) { 1245 int count = 0; 1246 for (int i = mUsers.size() - 1; i >= 0; i--) { 1247 UserInfo user = mUsers.valueAt(i); 1248 if (!excludeDying || !mRemovingUserIds.get(user.id)) { 1249 if ((user.flags & flags) != 0) { 1250 count++; 1251 } 1252 } 1253 } 1254 return count; 1255 } 1256 1257 /** 1258 * Find the current guest user. If the Guest user is partial, 1259 * then do not include it in the results as it is about to die. 1260 * This is different than {@link #numberOfUsersOfTypeLocked(int, boolean)} due to 1261 * the special handling of Guests being removed. 1262 */ 1263 private UserInfo findCurrentGuestUserLocked() { 1264 final int size = mUsers.size(); 1265 for (int i = 0; i < size; i++) { 1266 final UserInfo user = mUsers.valueAt(i); 1267 if (user.isGuest() && !user.guestToRemove && !mRemovingUserIds.get(user.id)) { 1268 return user; 1269 } 1270 } 1271 return null; 1272 } 1273 1274 /** 1275 * Mark this guest user for deletion to allow us to create another guest 1276 * and switch to that user before actually removing this guest. 1277 * @param userHandle the userid of the current guest 1278 * @return whether the user could be marked for deletion 1279 */ 1280 public boolean markGuestForDeletion(int userHandle) { 1281 checkManageUsersPermission("Only the system can remove users"); 1282 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1283 UserManager.DISALLOW_REMOVE_USER, false)) { 1284 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1285 return false; 1286 } 1287 1288 long ident = Binder.clearCallingIdentity(); 1289 try { 1290 final UserInfo user; 1291 synchronized (mPackagesLock) { 1292 user = mUsers.get(userHandle); 1293 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1294 return false; 1295 } 1296 if (!user.isGuest()) { 1297 return false; 1298 } 1299 // We set this to a guest user that is to be removed. This is a temporary state 1300 // where we are allowed to add new Guest users, even if this one is still not 1301 // removed. This user will still show up in getUserInfo() calls. 1302 // If we don't get around to removing this Guest user, it will be purged on next 1303 // startup. 1304 user.guestToRemove = true; 1305 // Mark it as disabled, so that it isn't returned any more when 1306 // profiles are queried. 1307 user.flags |= UserInfo.FLAG_DISABLED; 1308 writeUserLocked(user); 1309 } 1310 } finally { 1311 Binder.restoreCallingIdentity(ident); 1312 } 1313 return true; 1314 } 1315 1316 /** 1317 * Removes a user and all data directories created for that user. This method should be called 1318 * after the user's processes have been terminated. 1319 * @param userHandle the user's id 1320 */ 1321 public boolean removeUser(int userHandle) { 1322 checkManageUsersPermission("Only the system can remove users"); 1323 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1324 UserManager.DISALLOW_REMOVE_USER, false)) { 1325 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1326 return false; 1327 } 1328 1329 long ident = Binder.clearCallingIdentity(); 1330 try { 1331 final UserInfo user; 1332 synchronized (mPackagesLock) { 1333 user = mUsers.get(userHandle); 1334 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1335 return false; 1336 } 1337 1338 // We remember deleted user IDs to prevent them from being 1339 // reused during the current boot; they can still be reused 1340 // after a reboot. 1341 mRemovingUserIds.put(userHandle, true); 1342 1343 try { 1344 mAppOpsService.removeUser(userHandle); 1345 } catch (RemoteException e) { 1346 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1347 } 1348 // Set this to a partially created user, so that the user will be purged 1349 // on next startup, in case the runtime stops now before stopping and 1350 // removing the user completely. 1351 user.partial = true; 1352 // Mark it as disabled, so that it isn't returned any more when 1353 // profiles are queried. 1354 user.flags |= UserInfo.FLAG_DISABLED; 1355 writeUserLocked(user); 1356 } 1357 1358 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1359 && user.isManagedProfile()) { 1360 // Send broadcast to notify system that the user removed was a 1361 // managed user. 1362 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1363 } 1364 1365 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1366 int res; 1367 try { 1368 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1369 new IStopUserCallback.Stub() { 1370 @Override 1371 public void userStopped(int userId) { 1372 finishRemoveUser(userId); 1373 } 1374 @Override 1375 public void userStopAborted(int userId) { 1376 } 1377 }); 1378 } catch (RemoteException e) { 1379 return false; 1380 } 1381 return res == ActivityManager.USER_OP_SUCCESS; 1382 } finally { 1383 Binder.restoreCallingIdentity(ident); 1384 } 1385 } 1386 1387 void finishRemoveUser(final int userHandle) { 1388 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1389 // Let other services shutdown any activity and clean up their state before completely 1390 // wiping the user's system directory and removing from the user list 1391 long ident = Binder.clearCallingIdentity(); 1392 try { 1393 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1394 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1395 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1396 android.Manifest.permission.MANAGE_USERS, 1397 1398 new BroadcastReceiver() { 1399 @Override 1400 public void onReceive(Context context, Intent intent) { 1401 if (DBG) { 1402 Slog.i(LOG_TAG, 1403 "USER_REMOVED broadcast sent, cleaning up user data " 1404 + userHandle); 1405 } 1406 new Thread() { 1407 public void run() { 1408 synchronized (mInstallLock) { 1409 synchronized (mPackagesLock) { 1410 removeUserStateLocked(userHandle); 1411 } 1412 } 1413 } 1414 }.start(); 1415 } 1416 }, 1417 1418 null, Activity.RESULT_OK, null, null); 1419 } finally { 1420 Binder.restoreCallingIdentity(ident); 1421 } 1422 } 1423 1424 private void removeUserStateLocked(final int userHandle) { 1425 // Cleanup package manager settings 1426 mPm.cleanUpUserLILPw(this, userHandle); 1427 1428 // Remove this user from the list 1429 mUsers.remove(userHandle); 1430 1431 mRestrictionsPinStates.remove(userHandle); 1432 // Remove user file 1433 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1434 userFile.delete(); 1435 // Update the user list 1436 writeUserListLocked(); 1437 updateUserIdsLocked(); 1438 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1439 } 1440 1441 private void removeDirectoryRecursive(File parent) { 1442 if (parent.isDirectory()) { 1443 String[] files = parent.list(); 1444 for (String filename : files) { 1445 File child = new File(parent, filename); 1446 removeDirectoryRecursive(child); 1447 } 1448 } 1449 parent.delete(); 1450 } 1451 1452 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1453 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1454 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1455 Intent.FLAG_RECEIVER_FOREGROUND); 1456 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1457 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1458 } 1459 1460 @Override 1461 public Bundle getApplicationRestrictions(String packageName) { 1462 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1463 } 1464 1465 @Override 1466 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1467 if (UserHandle.getCallingUserId() != userId 1468 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1469 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1470 } 1471 synchronized (mPackagesLock) { 1472 // Read the restrictions from XML 1473 return readApplicationRestrictionsLocked(packageName, userId); 1474 } 1475 } 1476 1477 @Override 1478 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1479 int userId) { 1480 if (UserHandle.getCallingUserId() != userId 1481 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1482 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1483 } 1484 synchronized (mPackagesLock) { 1485 if (restrictions == null || restrictions.isEmpty()) { 1486 cleanAppRestrictionsForPackage(packageName, userId); 1487 } else { 1488 // Write the restrictions to XML 1489 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1490 } 1491 } 1492 1493 if (isPackageInstalled(packageName, userId)) { 1494 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1495 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1496 changeIntent.setPackage(packageName); 1497 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1498 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1499 } 1500 } 1501 1502 @Override 1503 public boolean setRestrictionsChallenge(String newPin) { 1504 checkManageUsersPermission("Only system can modify the restrictions pin"); 1505 int userId = UserHandle.getCallingUserId(); 1506 synchronized (mPackagesLock) { 1507 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1508 if (pinState == null) { 1509 pinState = new RestrictionsPinState(); 1510 } 1511 if (newPin == null) { 1512 pinState.salt = 0; 1513 pinState.pinHash = null; 1514 } else { 1515 try { 1516 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1517 } catch (NoSuchAlgorithmException e) { 1518 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1519 } 1520 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1521 pinState.failedAttempts = 0; 1522 } 1523 mRestrictionsPinStates.put(userId, pinState); 1524 writeUserLocked(mUsers.get(userId)); 1525 } 1526 return true; 1527 } 1528 1529 @Override 1530 public int checkRestrictionsChallenge(String pin) { 1531 checkManageUsersPermission("Only system can verify the restrictions pin"); 1532 int userId = UserHandle.getCallingUserId(); 1533 synchronized (mPackagesLock) { 1534 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1535 // If there's no pin set, return error code 1536 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1537 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1538 } else if (pin == null) { 1539 // If just checking if user can be prompted, return remaining time 1540 int waitTime = getRemainingTimeForPinAttempt(pinState); 1541 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1542 return waitTime; 1543 } else { 1544 int waitTime = getRemainingTimeForPinAttempt(pinState); 1545 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1546 if (waitTime > 0) { 1547 return waitTime; 1548 } 1549 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1550 pinState.failedAttempts = 0; 1551 scheduleWriteUserLocked(mUsers.get(userId)); 1552 return UserManager.PIN_VERIFICATION_SUCCESS; 1553 } else { 1554 pinState.failedAttempts++; 1555 pinState.lastAttemptTime = System.currentTimeMillis(); 1556 scheduleWriteUserLocked(mUsers.get(userId)); 1557 return waitTime; 1558 } 1559 } 1560 } 1561 } 1562 1563 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1564 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1565 BACKOFF_TIMES.length - 1); 1566 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1567 BACKOFF_TIMES[backoffIndex] : 0; 1568 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1569 0); 1570 } 1571 1572 @Override 1573 public boolean hasRestrictionsChallenge() { 1574 int userId = UserHandle.getCallingUserId(); 1575 synchronized (mPackagesLock) { 1576 return hasRestrictionsPinLocked(userId); 1577 } 1578 } 1579 1580 private boolean hasRestrictionsPinLocked(int userId) { 1581 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1582 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1583 return false; 1584 } 1585 return true; 1586 } 1587 1588 @Override 1589 public void removeRestrictions() { 1590 checkManageUsersPermission("Only system can remove restrictions"); 1591 final int userHandle = UserHandle.getCallingUserId(); 1592 removeRestrictionsForUser(userHandle, true); 1593 } 1594 1595 private void removeRestrictionsForUser(final int userHandle, boolean unhideApps) { 1596 synchronized (mPackagesLock) { 1597 // Remove all user restrictions 1598 setUserRestrictions(new Bundle(), userHandle); 1599 // Remove restrictions pin 1600 setRestrictionsChallenge(null); 1601 // Remove any app restrictions 1602 cleanAppRestrictions(userHandle); 1603 } 1604 if (unhideApps) { 1605 unhideAllInstalledAppsForUser(userHandle); 1606 } 1607 } 1608 1609 private void unhideAllInstalledAppsForUser(final int userHandle) { 1610 mHandler.post(new Runnable() { 1611 @Override 1612 public void run() { 1613 List<ApplicationInfo> apps = 1614 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1615 userHandle).getList(); 1616 final long ident = Binder.clearCallingIdentity(); 1617 try { 1618 for (ApplicationInfo appInfo : apps) { 1619 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1620 && (appInfo.privateFlags & ApplicationInfo.PRIVATE_FLAG_HIDDEN) 1621 != 0) { 1622 mPm.setApplicationHiddenSettingAsUser(appInfo.packageName, false, 1623 userHandle); 1624 } 1625 } 1626 } finally { 1627 Binder.restoreCallingIdentity(ident); 1628 } 1629 } 1630 }); 1631 } 1632 1633 /* 1634 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1635 * Not the most secure, but it is at least a second level of protection. First level is that 1636 * the file is in a location only readable by the system process. 1637 * @param password the password. 1638 * @param salt the randomly generated salt 1639 * @return the hash of the pattern in a String. 1640 */ 1641 private String passwordToHash(String password, long salt) { 1642 if (password == null) { 1643 return null; 1644 } 1645 String algo = null; 1646 String hashed = salt + password; 1647 try { 1648 byte[] saltedPassword = (password + salt).getBytes(); 1649 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1650 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1651 hashed = toHex(sha1) + toHex(md5); 1652 } catch (NoSuchAlgorithmException e) { 1653 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1654 } 1655 return hashed; 1656 } 1657 1658 private static String toHex(byte[] ary) { 1659 final String hex = "0123456789ABCDEF"; 1660 String ret = ""; 1661 for (int i = 0; i < ary.length; i++) { 1662 ret += hex.charAt((ary[i] >> 4) & 0xf); 1663 ret += hex.charAt(ary[i] & 0xf); 1664 } 1665 return ret; 1666 } 1667 1668 private int getUidForPackage(String packageName) { 1669 long ident = Binder.clearCallingIdentity(); 1670 try { 1671 return mContext.getPackageManager().getApplicationInfo(packageName, 1672 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1673 } catch (NameNotFoundException nnfe) { 1674 return -1; 1675 } finally { 1676 Binder.restoreCallingIdentity(ident); 1677 } 1678 } 1679 1680 private Bundle readApplicationRestrictionsLocked(String packageName, 1681 int userId) { 1682 AtomicFile restrictionsFile = 1683 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1684 packageToRestrictionsFileName(packageName))); 1685 return readApplicationRestrictionsLocked(restrictionsFile); 1686 } 1687 1688 @VisibleForTesting 1689 static Bundle readApplicationRestrictionsLocked(AtomicFile restrictionsFile) { 1690 final Bundle restrictions = new Bundle(); 1691 final ArrayList<String> values = new ArrayList<>(); 1692 if (!restrictionsFile.getBaseFile().exists()) { 1693 return restrictions; 1694 } 1695 1696 FileInputStream fis = null; 1697 try { 1698 fis = restrictionsFile.openRead(); 1699 XmlPullParser parser = Xml.newPullParser(); 1700 parser.setInput(fis, null); 1701 XmlUtils.nextElement(parser); 1702 if (parser.getEventType() != XmlPullParser.START_TAG) { 1703 Slog.e(LOG_TAG, "Unable to read restrictions file " 1704 + restrictionsFile.getBaseFile()); 1705 return restrictions; 1706 } 1707 while (parser.next() != XmlPullParser.END_DOCUMENT) { 1708 readEntry(restrictions, values, parser); 1709 } 1710 } catch (IOException|XmlPullParserException e) { 1711 Log.w(LOG_TAG, "Error parsing " + restrictionsFile.getBaseFile(), e); 1712 } finally { 1713 IoUtils.closeQuietly(fis); 1714 } 1715 return restrictions; 1716 } 1717 1718 private static void readEntry(Bundle restrictions, ArrayList<String> values, 1719 XmlPullParser parser) throws XmlPullParserException, IOException { 1720 int type = parser.getEventType(); 1721 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1722 String key = parser.getAttributeValue(null, ATTR_KEY); 1723 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1724 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1725 if (multiple != null) { 1726 values.clear(); 1727 int count = Integer.parseInt(multiple); 1728 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1729 if (type == XmlPullParser.START_TAG 1730 && parser.getName().equals(TAG_VALUE)) { 1731 values.add(parser.nextText().trim()); 1732 count--; 1733 } 1734 } 1735 String [] valueStrings = new String[values.size()]; 1736 values.toArray(valueStrings); 1737 restrictions.putStringArray(key, valueStrings); 1738 } else if (ATTR_TYPE_BUNDLE.equals(valType)) { 1739 restrictions.putBundle(key, readBundleEntry(parser, values)); 1740 } else if (ATTR_TYPE_BUNDLE_ARRAY.equals(valType)) { 1741 final int outerDepth = parser.getDepth(); 1742 ArrayList<Bundle> bundleList = new ArrayList<>(); 1743 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1744 Bundle childBundle = readBundleEntry(parser, values); 1745 bundleList.add(childBundle); 1746 } 1747 restrictions.putParcelableArray(key, 1748 bundleList.toArray(new Bundle[bundleList.size()])); 1749 } else { 1750 String value = parser.nextText().trim(); 1751 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1752 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1753 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1754 restrictions.putInt(key, Integer.parseInt(value)); 1755 } else { 1756 restrictions.putString(key, value); 1757 } 1758 } 1759 } 1760 } 1761 1762 private static Bundle readBundleEntry(XmlPullParser parser, ArrayList<String> values) 1763 throws IOException, XmlPullParserException { 1764 Bundle childBundle = new Bundle(); 1765 final int outerDepth = parser.getDepth(); 1766 while (XmlUtils.nextElementWithin(parser, outerDepth)) { 1767 readEntry(childBundle, values, parser); 1768 } 1769 return childBundle; 1770 } 1771 1772 private void writeApplicationRestrictionsLocked(String packageName, 1773 Bundle restrictions, int userId) { 1774 AtomicFile restrictionsFile = new AtomicFile( 1775 new File(Environment.getUserSystemDirectory(userId), 1776 packageToRestrictionsFileName(packageName))); 1777 writeApplicationRestrictionsLocked(restrictions, restrictionsFile); 1778 } 1779 1780 @VisibleForTesting 1781 static void writeApplicationRestrictionsLocked(Bundle restrictions, 1782 AtomicFile restrictionsFile) { 1783 FileOutputStream fos = null; 1784 try { 1785 fos = restrictionsFile.startWrite(); 1786 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1787 1788 final XmlSerializer serializer = new FastXmlSerializer(); 1789 serializer.setOutput(bos, "utf-8"); 1790 serializer.startDocument(null, true); 1791 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1792 1793 serializer.startTag(null, TAG_RESTRICTIONS); 1794 writeBundle(restrictions, serializer); 1795 serializer.endTag(null, TAG_RESTRICTIONS); 1796 1797 serializer.endDocument(); 1798 restrictionsFile.finishWrite(fos); 1799 } catch (Exception e) { 1800 restrictionsFile.failWrite(fos); 1801 Slog.e(LOG_TAG, "Error writing application restrictions list", e); 1802 } 1803 } 1804 1805 private static void writeBundle(Bundle restrictions, XmlSerializer serializer) 1806 throws IOException { 1807 for (String key : restrictions.keySet()) { 1808 Object value = restrictions.get(key); 1809 serializer.startTag(null, TAG_ENTRY); 1810 serializer.attribute(null, ATTR_KEY, key); 1811 1812 if (value instanceof Boolean) { 1813 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1814 serializer.text(value.toString()); 1815 } else if (value instanceof Integer) { 1816 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1817 serializer.text(value.toString()); 1818 } else if (value == null || value instanceof String) { 1819 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1820 serializer.text(value != null ? (String) value : ""); 1821 } else if (value instanceof Bundle) { 1822 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1823 writeBundle((Bundle) value, serializer); 1824 } else if (value instanceof Parcelable[]) { 1825 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE_ARRAY); 1826 Parcelable[] array = (Parcelable[]) value; 1827 for (Parcelable parcelable : array) { 1828 if (!(parcelable instanceof Bundle)) { 1829 throw new IllegalArgumentException("bundle-array can only hold Bundles"); 1830 } 1831 serializer.startTag(null, TAG_ENTRY); 1832 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BUNDLE); 1833 writeBundle((Bundle) parcelable, serializer); 1834 serializer.endTag(null, TAG_ENTRY); 1835 } 1836 } else { 1837 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1838 String[] values = (String[]) value; 1839 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1840 for (String choice : values) { 1841 serializer.startTag(null, TAG_VALUE); 1842 serializer.text(choice != null ? choice : ""); 1843 serializer.endTag(null, TAG_VALUE); 1844 } 1845 } 1846 serializer.endTag(null, TAG_ENTRY); 1847 } 1848 } 1849 1850 @Override 1851 public int getUserSerialNumber(int userHandle) { 1852 synchronized (mPackagesLock) { 1853 if (!exists(userHandle)) return -1; 1854 return getUserInfoLocked(userHandle).serialNumber; 1855 } 1856 } 1857 1858 @Override 1859 public int getUserHandle(int userSerialNumber) { 1860 synchronized (mPackagesLock) { 1861 for (int userId : mUserIds) { 1862 UserInfo info = getUserInfoLocked(userId); 1863 if (info != null && info.serialNumber == userSerialNumber) return userId; 1864 } 1865 // Not found 1866 return -1; 1867 } 1868 } 1869 1870 /** 1871 * Caches the list of user ids in an array, adjusting the array size when necessary. 1872 */ 1873 private void updateUserIdsLocked() { 1874 int num = 0; 1875 for (int i = 0; i < mUsers.size(); i++) { 1876 if (!mUsers.valueAt(i).partial) { 1877 num++; 1878 } 1879 } 1880 final int[] newUsers = new int[num]; 1881 int n = 0; 1882 for (int i = 0; i < mUsers.size(); i++) { 1883 if (!mUsers.valueAt(i).partial) { 1884 newUsers[n++] = mUsers.keyAt(i); 1885 } 1886 } 1887 mUserIds = newUsers; 1888 } 1889 1890 /** 1891 * Make a note of the last started time of a user and do some cleanup. 1892 * @param userId the user that was just foregrounded 1893 */ 1894 public void userForeground(int userId) { 1895 synchronized (mPackagesLock) { 1896 UserInfo user = mUsers.get(userId); 1897 long now = System.currentTimeMillis(); 1898 if (user == null || user.partial) { 1899 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1900 return; 1901 } 1902 if (now > EPOCH_PLUS_30_YEARS) { 1903 user.lastLoggedInTime = now; 1904 scheduleWriteUserLocked(user); 1905 } 1906 } 1907 } 1908 1909 /** 1910 * Returns the next available user id, filling in any holes in the ids. 1911 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1912 * for data and battery stats collection, or unexpected cross-talk. 1913 * @return 1914 */ 1915 private int getNextAvailableIdLocked() { 1916 synchronized (mPackagesLock) { 1917 int i = MIN_USER_ID; 1918 while (i < Integer.MAX_VALUE) { 1919 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1920 break; 1921 } 1922 i++; 1923 } 1924 return i; 1925 } 1926 } 1927 1928 private String packageToRestrictionsFileName(String packageName) { 1929 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1930 } 1931 1932 private String restrictionsFileNameToPackage(String fileName) { 1933 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1934 (int) (fileName.length() - XML_SUFFIX.length())); 1935 } 1936 1937 @Override 1938 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1939 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1940 != PackageManager.PERMISSION_GRANTED) { 1941 pw.println("Permission Denial: can't dump UserManager from from pid=" 1942 + Binder.getCallingPid() 1943 + ", uid=" + Binder.getCallingUid() 1944 + " without permission " 1945 + android.Manifest.permission.DUMP); 1946 return; 1947 } 1948 1949 long now = System.currentTimeMillis(); 1950 StringBuilder sb = new StringBuilder(); 1951 synchronized (mPackagesLock) { 1952 pw.println("Users:"); 1953 for (int i = 0; i < mUsers.size(); i++) { 1954 UserInfo user = mUsers.valueAt(i); 1955 if (user == null) continue; 1956 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1957 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1958 if (user.partial) pw.print(" <partial>"); 1959 pw.println(); 1960 pw.print(" Created: "); 1961 if (user.creationTime == 0) { 1962 pw.println("<unknown>"); 1963 } else { 1964 sb.setLength(0); 1965 TimeUtils.formatDuration(now - user.creationTime, sb); 1966 sb.append(" ago"); 1967 pw.println(sb); 1968 } 1969 pw.print(" Last logged in: "); 1970 if (user.lastLoggedInTime == 0) { 1971 pw.println("<unknown>"); 1972 } else { 1973 sb.setLength(0); 1974 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1975 sb.append(" ago"); 1976 pw.println(sb); 1977 } 1978 } 1979 } 1980 } 1981 1982 final class MainHandler extends Handler { 1983 1984 @Override 1985 public void handleMessage(Message msg) { 1986 switch (msg.what) { 1987 case WRITE_USER_MSG: 1988 removeMessages(WRITE_USER_MSG, msg.obj); 1989 synchronized (mPackagesLock) { 1990 int userId = ((UserInfo) msg.obj).id; 1991 UserInfo userInfo = mUsers.get(userId); 1992 if (userInfo != null) { 1993 writeUserLocked(userInfo); 1994 } 1995 } 1996 } 1997 } 1998 } 1999} 2000