UserManagerService.java revision 1c7c319bb89b9988bfd12afc3e8d89449fd163fc
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 static android.text.format.DateUtils.MINUTE_IN_MILLIS; 20 21import android.app.Activity; 22import android.app.ActivityManager; 23import android.app.ActivityManagerNative; 24import android.app.ActivityThread; 25import android.app.IStopUserCallback; 26import android.content.BroadcastReceiver; 27import android.content.Context; 28import android.content.Intent; 29import android.content.pm.ApplicationInfo; 30import android.content.pm.PackageManager; 31import android.content.pm.PackageManager.NameNotFoundException; 32import android.content.pm.UserInfo; 33import android.graphics.Bitmap; 34import android.graphics.BitmapFactory; 35import android.os.Binder; 36import android.os.Bundle; 37import android.os.Environment; 38import android.os.FileUtils; 39import android.os.Handler; 40import android.os.IUserManager; 41import android.os.Process; 42import android.os.RemoteException; 43import android.os.ServiceManager; 44import android.os.UserHandle; 45import android.os.UserManager; 46import android.util.AtomicFile; 47import android.util.Log; 48import android.util.Slog; 49import android.util.SparseArray; 50import android.util.SparseBooleanArray; 51import android.util.TimeUtils; 52import android.util.Xml; 53 54import com.android.internal.app.IAppOpsService; 55import com.android.internal.content.PackageMonitor; 56import com.android.internal.util.ArrayUtils; 57import com.android.internal.util.FastXmlSerializer; 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 77public class UserManagerService extends IUserManager.Stub { 78 79 private static final String LOG_TAG = "UserManagerService"; 80 81 private static final boolean DBG = false; 82 83 private static final String TAG_NAME = "name"; 84 private static final String ATTR_FLAGS = "flags"; 85 private static final String ATTR_ICON_PATH = "icon"; 86 private static final String ATTR_ID = "id"; 87 private static final String ATTR_CREATION_TIME = "created"; 88 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 89 private static final String ATTR_SALT = "salt"; 90 private static final String ATTR_PIN_HASH = "pinHash"; 91 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 92 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 93 private static final String ATTR_SERIAL_NO = "serialNumber"; 94 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 95 private static final String ATTR_PARTIAL = "partial"; 96 private static final String ATTR_USER_VERSION = "version"; 97 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 98 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 99 private static final String TAG_USERS = "users"; 100 private static final String TAG_USER = "user"; 101 private static final String TAG_RESTRICTIONS = "restrictions"; 102 private static final String TAG_ENTRY = "entry"; 103 private static final String TAG_VALUE = "value"; 104 private static final String ATTR_KEY = "key"; 105 private static final String ATTR_VALUE_TYPE = "type"; 106 private static final String ATTR_MULTIPLE = "m"; 107 108 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 109 private static final String ATTR_TYPE_STRING = "s"; 110 private static final String ATTR_TYPE_BOOLEAN = "b"; 111 private static final String ATTR_TYPE_INTEGER = "i"; 112 113 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 114 private static final String USER_LIST_FILENAME = "userlist.xml"; 115 private static final String USER_PHOTO_FILENAME = "photo.png"; 116 117 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 118 private static final String XML_SUFFIX = ".xml"; 119 120 private static final int MIN_USER_ID = 10; 121 122 private static final int USER_VERSION = 4; 123 124 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 125 126 // Number of attempts before jumping to the next BACKOFF_TIMES slot 127 private static final int BACKOFF_INC_INTERVAL = 5; 128 129 // Amount of time to force the user to wait before entering the PIN again, after failing 130 // BACKOFF_INC_INTERVAL times. 131 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 132 133 134 private final Context mContext; 135 private final PackageManagerService mPm; 136 private final Object mInstallLock; 137 private final Object mPackagesLock; 138 139 private final Handler mHandler; 140 141 private final File mUsersDir; 142 private final File mUserListFile; 143 private final File mBaseUserPath; 144 145 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 146 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 147 private final Bundle mGuestRestrictions = new Bundle(); 148 149 class RestrictionsPinState { 150 long salt; 151 String pinHash; 152 int failedAttempts; 153 long lastAttemptTime; 154 } 155 156 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 157 new SparseArray<RestrictionsPinState>(); 158 159 /** 160 * Set of user IDs being actively removed. Removed IDs linger in this set 161 * for several seconds to work around a VFS caching issue. 162 */ 163 // @GuardedBy("mPackagesLock") 164 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 165 166 private int[] mUserIds; 167 private int mNextSerialNumber; 168 private int mUserVersion = 0; 169 170 private IAppOpsService mAppOpsService; 171 172 private static UserManagerService sInstance; 173 174 public static UserManagerService getInstance() { 175 synchronized (UserManagerService.class) { 176 return sInstance; 177 } 178 } 179 180 /** 181 * Available for testing purposes. 182 */ 183 UserManagerService(File dataDir, File baseUserPath) { 184 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 185 } 186 187 /** 188 * Called by package manager to create the service. This is closely 189 * associated with the package manager, and the given lock is the 190 * package manager's own lock. 191 */ 192 UserManagerService(Context context, PackageManagerService pm, 193 Object installLock, Object packagesLock) { 194 this(context, pm, installLock, packagesLock, 195 Environment.getDataDirectory(), 196 new File(Environment.getDataDirectory(), "user")); 197 } 198 199 /** 200 * Available for testing purposes. 201 */ 202 private UserManagerService(Context context, PackageManagerService pm, 203 Object installLock, Object packagesLock, 204 File dataDir, File baseUserPath) { 205 mContext = context; 206 mPm = pm; 207 mInstallLock = installLock; 208 mPackagesLock = packagesLock; 209 mHandler = new Handler(); 210 synchronized (mInstallLock) { 211 synchronized (mPackagesLock) { 212 mUsersDir = new File(dataDir, USER_INFO_DIR); 213 mUsersDir.mkdirs(); 214 // Make zeroth user directory, for services to migrate their files to that location 215 File userZeroDir = new File(mUsersDir, "0"); 216 userZeroDir.mkdirs(); 217 mBaseUserPath = baseUserPath; 218 FileUtils.setPermissions(mUsersDir.toString(), 219 FileUtils.S_IRWXU|FileUtils.S_IRWXG 220 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 221 -1, -1); 222 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 223 readUserListLocked(); 224 // Prune out any partially created/partially removed users. 225 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 226 for (int i = 0; i < mUsers.size(); i++) { 227 UserInfo ui = mUsers.valueAt(i); 228 if (ui.partial && i != 0) { 229 partials.add(ui); 230 } 231 } 232 for (int i = 0; i < partials.size(); i++) { 233 UserInfo ui = partials.get(i); 234 Slog.w(LOG_TAG, "Removing partially created user #" + i 235 + " (name=" + ui.name + ")"); 236 removeUserStateLocked(ui.id); 237 } 238 sInstance = this; 239 } 240 } 241 } 242 243 void systemReady() { 244 mUserPackageMonitor.register(mContext, null, UserHandle.ALL, false); 245 userForeground(UserHandle.USER_OWNER); 246 mAppOpsService = IAppOpsService.Stub.asInterface( 247 ServiceManager.getService(Context.APP_OPS_SERVICE)); 248 for (int i = 0; i < mUserIds.length; ++i) { 249 try { 250 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 251 } catch (RemoteException e) { 252 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 253 } 254 } 255 } 256 257 @Override 258 public List<UserInfo> getUsers(boolean excludeDying) { 259 checkManageUsersPermission("query users"); 260 synchronized (mPackagesLock) { 261 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 262 for (int i = 0; i < mUsers.size(); i++) { 263 UserInfo ui = mUsers.valueAt(i); 264 if (ui.partial) { 265 continue; 266 } 267 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 268 users.add(ui); 269 } 270 } 271 return users; 272 } 273 } 274 275 @Override 276 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 277 if (userId != UserHandle.getCallingUserId()) { 278 checkManageUsersPermission("getting profiles related to user " + userId); 279 } 280 final long ident = Binder.clearCallingIdentity(); 281 try { 282 synchronized (mPackagesLock) { 283 return getProfilesLocked(userId, enabledOnly); 284 } 285 } finally { 286 Binder.restoreCallingIdentity(ident); 287 } 288 } 289 290 /** Assume permissions already checked and caller's identity cleared */ 291 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 292 UserInfo user = getUserInfoLocked(userId); 293 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 294 for (int i = 0; i < mUsers.size(); i++) { 295 UserInfo profile = mUsers.valueAt(i); 296 if (!isProfileOf(user, profile)) { 297 continue; 298 } 299 if (enabledOnly && !profile.isEnabled()) { 300 continue; 301 } 302 users.add(profile); 303 } 304 return users; 305 } 306 307 @Override 308 public UserInfo getProfileParent(int userHandle) { 309 checkManageUsersPermission("get the profile parent"); 310 synchronized (mPackagesLock) { 311 UserInfo profile = getUserInfoLocked(userHandle); 312 int parentUserId = profile.profileGroupId; 313 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 314 return null; 315 } else { 316 return getUserInfoLocked(parentUserId); 317 } 318 } 319 } 320 321 private boolean isProfileOf(UserInfo user, UserInfo profile) { 322 return user.id == profile.id || 323 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 324 && user.profileGroupId == profile.profileGroupId); 325 } 326 327 @Override 328 public void setUserEnabled(int userId) { 329 checkManageUsersPermission("enable user"); 330 synchronized (mPackagesLock) { 331 UserInfo info = getUserInfoLocked(userId); 332 if (info != null && !info.isEnabled()) { 333 info.flags ^= UserInfo.FLAG_DISABLED; 334 writeUserLocked(info); 335 } 336 } 337 } 338 339 @Override 340 public UserInfo getUserInfo(int userId) { 341 checkManageUsersPermission("query user"); 342 synchronized (mPackagesLock) { 343 return getUserInfoLocked(userId); 344 } 345 } 346 347 @Override 348 public boolean isRestricted() { 349 synchronized (mPackagesLock) { 350 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 351 } 352 } 353 354 /* 355 * Should be locked on mUsers before calling this. 356 */ 357 private UserInfo getUserInfoLocked(int userId) { 358 UserInfo ui = mUsers.get(userId); 359 // If it is partial and not in the process of being removed, return as unknown user. 360 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 361 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 362 return null; 363 } 364 return ui; 365 } 366 367 public boolean exists(int userId) { 368 synchronized (mPackagesLock) { 369 return ArrayUtils.contains(mUserIds, userId); 370 } 371 } 372 373 @Override 374 public void setUserName(int userId, String name) { 375 checkManageUsersPermission("rename users"); 376 boolean changed = false; 377 synchronized (mPackagesLock) { 378 UserInfo info = mUsers.get(userId); 379 if (info == null || info.partial) { 380 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 381 return; 382 } 383 if (name != null && !name.equals(info.name)) { 384 info.name = name; 385 writeUserLocked(info); 386 changed = true; 387 } 388 } 389 if (changed) { 390 sendUserInfoChangedBroadcast(userId); 391 } 392 } 393 394 @Override 395 public void setUserIcon(int userId, Bitmap bitmap) { 396 checkManageUsersPermission("update users"); 397 synchronized (mPackagesLock) { 398 UserInfo info = mUsers.get(userId); 399 if (info == null || info.partial) { 400 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 401 return; 402 } 403 writeBitmapLocked(info, bitmap); 404 writeUserLocked(info); 405 } 406 sendUserInfoChangedBroadcast(userId); 407 } 408 409 private void sendUserInfoChangedBroadcast(int userId) { 410 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 411 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 412 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 413 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 414 } 415 416 @Override 417 public Bitmap getUserIcon(int userId) { 418 synchronized (mPackagesLock) { 419 UserInfo info = mUsers.get(userId); 420 if (info == null || info.partial) { 421 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 422 return null; 423 } 424 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 425 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 426 || callingGroupId != info.profileGroupId) { 427 checkManageUsersPermission("get the icon of a user who is not related"); 428 } 429 if (info.iconPath == null) { 430 return null; 431 } 432 return BitmapFactory.decodeFile(info.iconPath); 433 } 434 } 435 436 public void makeInitialized(int userId) { 437 checkManageUsersPermission("makeInitialized"); 438 synchronized (mPackagesLock) { 439 UserInfo info = mUsers.get(userId); 440 if (info == null || info.partial) { 441 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 442 } 443 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 444 info.flags |= UserInfo.FLAG_INITIALIZED; 445 writeUserLocked(info); 446 } 447 } 448 } 449 450 @Override 451 public Bundle getDefaultGuestRestrictions() { 452 checkManageUsersPermission("getDefaultGuestRestrictions"); 453 synchronized (mPackagesLock) { 454 return new Bundle(mGuestRestrictions); 455 } 456 } 457 458 @Override 459 public void setDefaultGuestRestrictions(Bundle restrictions) { 460 checkManageUsersPermission("setDefaultGuestRestrictions"); 461 synchronized (mPackagesLock) { 462 mGuestRestrictions.clear(); 463 mGuestRestrictions.putAll(restrictions); 464 writeUserListLocked(); 465 } 466 } 467 468 @Override 469 public Bundle getUserRestrictions(int userId) { 470 // checkManageUsersPermission("getUserRestrictions"); 471 472 synchronized (mPackagesLock) { 473 Bundle restrictions = mUserRestrictions.get(userId); 474 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 475 } 476 } 477 478 @Override 479 public void setUserRestrictions(Bundle restrictions, int userId) { 480 checkManageUsersPermission("setUserRestrictions"); 481 if (restrictions == null) return; 482 483 synchronized (mPackagesLock) { 484 mUserRestrictions.get(userId).clear(); 485 mUserRestrictions.get(userId).putAll(restrictions); 486 long token = Binder.clearCallingIdentity(); 487 try { 488 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 489 } catch (RemoteException e) { 490 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 491 } finally { 492 Binder.restoreCallingIdentity(token); 493 } 494 writeUserLocked(mUsers.get(userId)); 495 } 496 } 497 498 /** 499 * Check if we've hit the limit of how many users can be created. 500 */ 501 private boolean isUserLimitReachedLocked() { 502 int aliveUserCount = 0; 503 final int totalUserCount = mUsers.size(); 504 // Skip over users being removed 505 for (int i = 0; i < totalUserCount; i++) { 506 UserInfo user = mUsers.valueAt(i); 507 if (!mRemovingUserIds.get(user.id)) { 508 aliveUserCount++; 509 } 510 } 511 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 512 } 513 514 /** 515 * Enforces that only the system UID or root's UID or apps that have the 516 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 517 * permission can make certain calls to the UserManager. 518 * 519 * @param message used as message if SecurityException is thrown 520 * @throws SecurityException if the caller is not system or root 521 */ 522 private static final void checkManageUsersPermission(String message) { 523 final int uid = Binder.getCallingUid(); 524 if (uid != Process.SYSTEM_UID && uid != 0 525 && ActivityManager.checkComponentPermission( 526 android.Manifest.permission.MANAGE_USERS, 527 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 528 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 529 } 530 } 531 532 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 533 try { 534 File dir = new File(mUsersDir, Integer.toString(info.id)); 535 File file = new File(dir, USER_PHOTO_FILENAME); 536 if (!dir.exists()) { 537 dir.mkdir(); 538 FileUtils.setPermissions( 539 dir.getPath(), 540 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 541 -1, -1); 542 } 543 FileOutputStream os; 544 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 545 info.iconPath = file.getAbsolutePath(); 546 } 547 try { 548 os.close(); 549 } catch (IOException ioe) { 550 // What the ... ! 551 } 552 } catch (FileNotFoundException e) { 553 Slog.w(LOG_TAG, "Error setting photo for user ", e); 554 } 555 } 556 557 /** 558 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 559 * cache it elsewhere. 560 * @return the array of user ids. 561 */ 562 public int[] getUserIds() { 563 synchronized (mPackagesLock) { 564 return mUserIds; 565 } 566 } 567 568 int[] getUserIdsLPr() { 569 return mUserIds; 570 } 571 572 private void readUserListLocked() { 573 if (!mUserListFile.exists()) { 574 fallbackToSingleUserLocked(); 575 return; 576 } 577 FileInputStream fis = null; 578 AtomicFile userListFile = new AtomicFile(mUserListFile); 579 try { 580 fis = userListFile.openRead(); 581 XmlPullParser parser = Xml.newPullParser(); 582 parser.setInput(fis, null); 583 int type; 584 while ((type = parser.next()) != XmlPullParser.START_TAG 585 && type != XmlPullParser.END_DOCUMENT) { 586 ; 587 } 588 589 if (type != XmlPullParser.START_TAG) { 590 Slog.e(LOG_TAG, "Unable to read user list"); 591 fallbackToSingleUserLocked(); 592 return; 593 } 594 595 mNextSerialNumber = -1; 596 if (parser.getName().equals(TAG_USERS)) { 597 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 598 if (lastSerialNumber != null) { 599 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 600 } 601 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 602 if (versionNumber != null) { 603 mUserVersion = Integer.parseInt(versionNumber); 604 } 605 } 606 607 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 608 if (type == XmlPullParser.START_TAG) { 609 final String name = parser.getName(); 610 if (name.equals(TAG_USER)) { 611 String id = parser.getAttributeValue(null, ATTR_ID); 612 UserInfo user = readUserLocked(Integer.parseInt(id)); 613 614 if (user != null) { 615 mUsers.put(user.id, user); 616 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 617 mNextSerialNumber = user.id + 1; 618 } 619 } 620 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 621 mGuestRestrictions.clear(); 622 readRestrictionsLocked(parser, mGuestRestrictions); 623 } 624 } 625 } 626 updateUserIdsLocked(); 627 upgradeIfNecessaryLocked(); 628 } catch (IOException ioe) { 629 fallbackToSingleUserLocked(); 630 } catch (XmlPullParserException pe) { 631 fallbackToSingleUserLocked(); 632 } finally { 633 if (fis != null) { 634 try { 635 fis.close(); 636 } catch (IOException e) { 637 } 638 } 639 } 640 } 641 642 /** 643 * Upgrade steps between versions, either for fixing bugs or changing the data format. 644 */ 645 private void upgradeIfNecessaryLocked() { 646 int userVersion = mUserVersion; 647 if (userVersion < 1) { 648 // Assign a proper name for the owner, if not initialized correctly before 649 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 650 if ("Primary".equals(user.name)) { 651 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 652 writeUserLocked(user); 653 } 654 userVersion = 1; 655 } 656 657 if (userVersion < 2) { 658 // Owner should be marked as initialized 659 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 660 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 661 user.flags |= UserInfo.FLAG_INITIALIZED; 662 writeUserLocked(user); 663 } 664 userVersion = 2; 665 } 666 667 668 if (userVersion < 4) { 669 userVersion = 4; 670 } 671 672 if (userVersion < USER_VERSION) { 673 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 674 + USER_VERSION); 675 } else { 676 mUserVersion = userVersion; 677 writeUserListLocked(); 678 } 679 } 680 681 private void fallbackToSingleUserLocked() { 682 // Create the primary user 683 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 684 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 685 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 686 mUsers.put(0, primary); 687 mNextSerialNumber = MIN_USER_ID; 688 mUserVersion = USER_VERSION; 689 690 Bundle restrictions = new Bundle(); 691 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 692 693 updateUserIdsLocked(); 694 695 writeUserListLocked(); 696 writeUserLocked(primary); 697 } 698 699 /* 700 * Writes the user file in this format: 701 * 702 * <user flags="20039023" id="0"> 703 * <name>Primary</name> 704 * </user> 705 */ 706 private void writeUserLocked(UserInfo userInfo) { 707 FileOutputStream fos = null; 708 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 709 try { 710 fos = userFile.startWrite(); 711 final BufferedOutputStream bos = new BufferedOutputStream(fos); 712 713 // XmlSerializer serializer = XmlUtils.serializerInstance(); 714 final XmlSerializer serializer = new FastXmlSerializer(); 715 serializer.setOutput(bos, "utf-8"); 716 serializer.startDocument(null, true); 717 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 718 719 serializer.startTag(null, TAG_USER); 720 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 721 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 722 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 723 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 724 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 725 Long.toString(userInfo.lastLoggedInTime)); 726 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 727 if (pinState != null) { 728 if (pinState.salt != 0) { 729 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 730 } 731 if (pinState.pinHash != null) { 732 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 733 } 734 if (pinState.failedAttempts != 0) { 735 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 736 Integer.toString(pinState.failedAttempts)); 737 serializer.attribute(null, ATTR_LAST_RETRY_MS, 738 Long.toString(pinState.lastAttemptTime)); 739 } 740 } 741 if (userInfo.iconPath != null) { 742 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 743 } 744 if (userInfo.partial) { 745 serializer.attribute(null, ATTR_PARTIAL, "true"); 746 } 747 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 748 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 749 Integer.toString(userInfo.profileGroupId)); 750 } 751 752 serializer.startTag(null, TAG_NAME); 753 serializer.text(userInfo.name); 754 serializer.endTag(null, TAG_NAME); 755 Bundle restrictions = mUserRestrictions.get(userInfo.id); 756 if (restrictions != null) { 757 writeRestrictionsLocked(serializer, restrictions); 758 } 759 serializer.endTag(null, TAG_USER); 760 761 serializer.endDocument(); 762 userFile.finishWrite(fos); 763 } catch (Exception ioe) { 764 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 765 userFile.failWrite(fos); 766 } 767 } 768 769 /* 770 * Writes the user list file in this format: 771 * 772 * <users nextSerialNumber="3"> 773 * <user id="0"></user> 774 * <user id="2"></user> 775 * </users> 776 */ 777 private void writeUserListLocked() { 778 FileOutputStream fos = null; 779 AtomicFile userListFile = new AtomicFile(mUserListFile); 780 try { 781 fos = userListFile.startWrite(); 782 final BufferedOutputStream bos = new BufferedOutputStream(fos); 783 784 // XmlSerializer serializer = XmlUtils.serializerInstance(); 785 final XmlSerializer serializer = new FastXmlSerializer(); 786 serializer.setOutput(bos, "utf-8"); 787 serializer.startDocument(null, true); 788 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 789 790 serializer.startTag(null, TAG_USERS); 791 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 792 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 793 794 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 795 writeRestrictionsLocked(serializer, mGuestRestrictions); 796 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 797 for (int i = 0; i < mUsers.size(); i++) { 798 UserInfo user = mUsers.valueAt(i); 799 serializer.startTag(null, TAG_USER); 800 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 801 serializer.endTag(null, TAG_USER); 802 } 803 804 serializer.endTag(null, TAG_USERS); 805 806 serializer.endDocument(); 807 userListFile.finishWrite(fos); 808 } catch (Exception e) { 809 userListFile.failWrite(fos); 810 Slog.e(LOG_TAG, "Error writing user list"); 811 } 812 } 813 814 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 815 throws IOException { 816 serializer.startTag(null, TAG_RESTRICTIONS); 817 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 818 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 819 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 820 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 821 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 822 writeBoolean(serializer, restrictions, 823 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 824 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 825 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 826 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 827 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 828 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 829 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 830 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 831 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 832 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 833 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 834 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 835 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 836 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 837 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 838 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 839 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 840 writeBoolean(serializer, restrictions, UserManager.DISALLOW_TELEPHONY); 841 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 842 serializer.endTag(null, TAG_RESTRICTIONS); 843 } 844 845 private UserInfo readUserLocked(int id) { 846 int flags = 0; 847 int serialNumber = id; 848 String name = null; 849 String iconPath = null; 850 long creationTime = 0L; 851 long lastLoggedInTime = 0L; 852 long salt = 0L; 853 String pinHash = null; 854 int failedAttempts = 0; 855 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 856 long lastAttemptTime = 0L; 857 boolean partial = false; 858 Bundle restrictions = new Bundle(); 859 860 FileInputStream fis = null; 861 try { 862 AtomicFile userFile = 863 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 864 fis = userFile.openRead(); 865 XmlPullParser parser = Xml.newPullParser(); 866 parser.setInput(fis, null); 867 int type; 868 while ((type = parser.next()) != XmlPullParser.START_TAG 869 && type != XmlPullParser.END_DOCUMENT) { 870 ; 871 } 872 873 if (type != XmlPullParser.START_TAG) { 874 Slog.e(LOG_TAG, "Unable to read user " + id); 875 return null; 876 } 877 878 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 879 int storedId = readIntAttribute(parser, ATTR_ID, -1); 880 if (storedId != id) { 881 Slog.e(LOG_TAG, "User id does not match the file name"); 882 return null; 883 } 884 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 885 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 886 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 887 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 888 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 889 salt = readLongAttribute(parser, ATTR_SALT, 0L); 890 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 891 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 892 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 893 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 894 UserInfo.NO_PROFILE_GROUP_ID); 895 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 896 // This attribute was added and renamed during development of L. 897 // TODO Remove upgrade path by 1st May 2014 898 profileGroupId = readIntAttribute(parser, "relatedGroupId", 899 UserInfo.NO_PROFILE_GROUP_ID); 900 } 901 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 902 if ("true".equals(valueString)) { 903 partial = true; 904 } 905 906 int outerDepth = parser.getDepth(); 907 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 908 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 909 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 910 continue; 911 } 912 String tag = parser.getName(); 913 if (TAG_NAME.equals(tag)) { 914 type = parser.next(); 915 if (type == XmlPullParser.TEXT) { 916 name = parser.getText(); 917 } 918 } else if (TAG_RESTRICTIONS.equals(tag)) { 919 readRestrictionsLocked(parser, restrictions); 920 } 921 } 922 } 923 924 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 925 userInfo.serialNumber = serialNumber; 926 userInfo.creationTime = creationTime; 927 userInfo.lastLoggedInTime = lastLoggedInTime; 928 userInfo.partial = partial; 929 userInfo.profileGroupId = profileGroupId; 930 mUserRestrictions.append(id, restrictions); 931 if (salt != 0L) { 932 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 933 if (pinState == null) { 934 pinState = new RestrictionsPinState(); 935 mRestrictionsPinStates.put(id, pinState); 936 } 937 pinState.salt = salt; 938 pinState.pinHash = pinHash; 939 pinState.failedAttempts = failedAttempts; 940 pinState.lastAttemptTime = lastAttemptTime; 941 } 942 return userInfo; 943 944 } catch (IOException ioe) { 945 } catch (XmlPullParserException pe) { 946 } finally { 947 if (fis != null) { 948 try { 949 fis.close(); 950 } catch (IOException e) { 951 } 952 } 953 } 954 return null; 955 } 956 957 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 958 throws IOException { 959 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 960 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 961 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 962 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 963 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 964 readBoolean(parser, restrictions, 965 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 966 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 967 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 968 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 969 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 970 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 971 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 972 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 973 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 974 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 975 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 976 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 977 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 978 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 979 readBoolean(parser, restrictions, 980 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 981 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 982 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 983 readBoolean(parser, restrictions, UserManager.DISALLOW_TELEPHONY); 984 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 985 } 986 987 private void readBoolean(XmlPullParser parser, Bundle restrictions, 988 String restrictionKey) { 989 String value = parser.getAttributeValue(null, restrictionKey); 990 if (value != null) { 991 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 992 } 993 } 994 995 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 996 throws IOException { 997 if (restrictions.containsKey(restrictionKey)) { 998 xml.attribute(null, restrictionKey, 999 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1000 } 1001 } 1002 1003 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1004 String valueString = parser.getAttributeValue(null, attr); 1005 if (valueString == null) return defaultValue; 1006 try { 1007 return Integer.parseInt(valueString); 1008 } catch (NumberFormatException nfe) { 1009 return defaultValue; 1010 } 1011 } 1012 1013 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1014 String valueString = parser.getAttributeValue(null, attr); 1015 if (valueString == null) return defaultValue; 1016 try { 1017 return Long.parseLong(valueString); 1018 } catch (NumberFormatException nfe) { 1019 return defaultValue; 1020 } 1021 } 1022 1023 private boolean isPackageInstalled(String pkg, int userId) { 1024 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1025 PackageManager.GET_UNINSTALLED_PACKAGES, 1026 userId); 1027 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1028 return false; 1029 } 1030 return true; 1031 } 1032 1033 /** 1034 * Removes all the restrictions files (res_<packagename>) for a given user, if all is true, 1035 * else removes only those packages that have been uninstalled. 1036 * Does not do any permissions checking. 1037 */ 1038 private void cleanAppRestrictions(int userId, boolean all) { 1039 synchronized (mPackagesLock) { 1040 File dir = Environment.getUserSystemDirectory(userId); 1041 String[] files = dir.list(); 1042 if (files == null) return; 1043 for (String fileName : files) { 1044 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1045 File resFile = new File(dir, fileName); 1046 if (resFile.exists()) { 1047 if (all) { 1048 resFile.delete(); 1049 } else { 1050 String pkg = restrictionsFileNameToPackage(fileName); 1051 if (!isPackageInstalled(pkg, userId)) { 1052 resFile.delete(); 1053 } 1054 } 1055 } 1056 } 1057 } 1058 } 1059 } 1060 1061 /** 1062 * Removes the app restrictions file for a specific package and user id, if it exists. 1063 */ 1064 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1065 synchronized (mPackagesLock) { 1066 File dir = Environment.getUserSystemDirectory(userId); 1067 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1068 if (resFile.exists()) { 1069 resFile.delete(); 1070 } 1071 } 1072 } 1073 1074 @Override 1075 public UserInfo createProfileForUser(String name, int flags, int userId) { 1076 checkManageUsersPermission("Only the system can create users"); 1077 if (userId != UserHandle.USER_OWNER) { 1078 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1079 return null; 1080 } 1081 return createUserInternal(name, flags, userId); 1082 } 1083 1084 @Override 1085 public UserInfo createUser(String name, int flags) { 1086 checkManageUsersPermission("Only the system can create users"); 1087 return createUserInternal(name, flags, UserHandle.USER_NULL); 1088 } 1089 1090 private UserInfo createUserInternal(String name, int flags, int parentId) { 1091 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1092 UserManager.DISALLOW_ADD_USER, false)) { 1093 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1094 return null; 1095 } 1096 final long ident = Binder.clearCallingIdentity(); 1097 UserInfo userInfo = null; 1098 try { 1099 synchronized (mInstallLock) { 1100 synchronized (mPackagesLock) { 1101 UserInfo parent = null; 1102 if (parentId != UserHandle.USER_NULL) { 1103 parent = getUserInfoLocked(parentId); 1104 if (parent == null) return null; 1105 } 1106 if (isUserLimitReachedLocked()) return null; 1107 int userId = getNextAvailableIdLocked(); 1108 userInfo = new UserInfo(userId, name, null, flags); 1109 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1110 userInfo.serialNumber = mNextSerialNumber++; 1111 long now = System.currentTimeMillis(); 1112 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1113 userInfo.partial = true; 1114 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1115 mUsers.put(userId, userInfo); 1116 writeUserListLocked(); 1117 if (parent != null) { 1118 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1119 parent.profileGroupId = parent.id; 1120 writeUserLocked(parent); 1121 } 1122 userInfo.profileGroupId = parent.profileGroupId; 1123 } 1124 writeUserLocked(userInfo); 1125 mPm.createNewUserLILPw(userId, userPath); 1126 userInfo.partial = false; 1127 writeUserLocked(userInfo); 1128 updateUserIdsLocked(); 1129 Bundle restrictions = new Bundle(); 1130 mUserRestrictions.append(userId, restrictions); 1131 } 1132 } 1133 if (userInfo != null) { 1134 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1135 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1136 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1137 android.Manifest.permission.MANAGE_USERS); 1138 } 1139 } finally { 1140 Binder.restoreCallingIdentity(ident); 1141 } 1142 return userInfo; 1143 } 1144 1145 /** 1146 * Removes a user and all data directories created for that user. This method should be called 1147 * after the user's processes have been terminated. 1148 * @param userHandle the user's id 1149 */ 1150 public boolean removeUser(int userHandle) { 1151 checkManageUsersPermission("Only the system can remove users"); 1152 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1153 UserManager.DISALLOW_REMOVE_USER, false)) { 1154 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1155 return false; 1156 } 1157 1158 long ident = Binder.clearCallingIdentity(); 1159 try { 1160 final UserInfo user; 1161 synchronized (mPackagesLock) { 1162 user = mUsers.get(userHandle); 1163 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1164 return false; 1165 } 1166 mRemovingUserIds.put(userHandle, true); 1167 try { 1168 mAppOpsService.removeUser(userHandle); 1169 } catch (RemoteException e) { 1170 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1171 } 1172 // Set this to a partially created user, so that the user will be purged 1173 // on next startup, in case the runtime stops now before stopping and 1174 // removing the user completely. 1175 user.partial = true; 1176 // Mark it as disabled, so that it isn't returned any more when 1177 // profiles are queried. 1178 user.flags |= UserInfo.FLAG_DISABLED; 1179 writeUserLocked(user); 1180 } 1181 1182 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1183 && user.isManagedProfile()) { 1184 // Send broadcast to notify system that the user removed was a 1185 // managed user. 1186 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1187 } 1188 1189 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1190 int res; 1191 try { 1192 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1193 new IStopUserCallback.Stub() { 1194 @Override 1195 public void userStopped(int userId) { 1196 finishRemoveUser(userId); 1197 } 1198 @Override 1199 public void userStopAborted(int userId) { 1200 } 1201 }); 1202 } catch (RemoteException e) { 1203 return false; 1204 } 1205 return res == ActivityManager.USER_OP_SUCCESS; 1206 } finally { 1207 Binder.restoreCallingIdentity(ident); 1208 } 1209 } 1210 1211 void finishRemoveUser(final int userHandle) { 1212 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1213 // Let other services shutdown any activity and clean up their state before completely 1214 // wiping the user's system directory and removing from the user list 1215 long ident = Binder.clearCallingIdentity(); 1216 try { 1217 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1218 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1219 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1220 android.Manifest.permission.MANAGE_USERS, 1221 1222 new BroadcastReceiver() { 1223 @Override 1224 public void onReceive(Context context, Intent intent) { 1225 if (DBG) { 1226 Slog.i(LOG_TAG, 1227 "USER_REMOVED broadcast sent, cleaning up user data " 1228 + userHandle); 1229 } 1230 new Thread() { 1231 public void run() { 1232 synchronized (mInstallLock) { 1233 synchronized (mPackagesLock) { 1234 removeUserStateLocked(userHandle); 1235 } 1236 } 1237 } 1238 }.start(); 1239 } 1240 }, 1241 1242 null, Activity.RESULT_OK, null, null); 1243 } finally { 1244 Binder.restoreCallingIdentity(ident); 1245 } 1246 } 1247 1248 private void removeUserStateLocked(final int userHandle) { 1249 // Cleanup package manager settings 1250 mPm.cleanUpUserLILPw(userHandle); 1251 1252 // Remove this user from the list 1253 mUsers.remove(userHandle); 1254 1255 // Have user ID linger for several seconds to let external storage VFS 1256 // cache entries expire. This must be greater than the 'entry_valid' 1257 // timeout used by the FUSE daemon. 1258 mHandler.postDelayed(new Runnable() { 1259 @Override 1260 public void run() { 1261 synchronized (mPackagesLock) { 1262 mRemovingUserIds.delete(userHandle); 1263 } 1264 } 1265 }, MINUTE_IN_MILLIS); 1266 1267 mRestrictionsPinStates.remove(userHandle); 1268 // Remove user file 1269 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1270 userFile.delete(); 1271 // Update the user list 1272 writeUserListLocked(); 1273 updateUserIdsLocked(); 1274 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1275 } 1276 1277 private void removeDirectoryRecursive(File parent) { 1278 if (parent.isDirectory()) { 1279 String[] files = parent.list(); 1280 for (String filename : files) { 1281 File child = new File(parent, filename); 1282 removeDirectoryRecursive(child); 1283 } 1284 } 1285 parent.delete(); 1286 } 1287 1288 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1289 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1290 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1291 Intent.FLAG_RECEIVER_FOREGROUND); 1292 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1293 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1294 } 1295 1296 @Override 1297 public Bundle getApplicationRestrictions(String packageName) { 1298 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1299 } 1300 1301 @Override 1302 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1303 if (UserHandle.getCallingUserId() != userId 1304 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1305 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1306 } 1307 synchronized (mPackagesLock) { 1308 // Read the restrictions from XML 1309 return readApplicationRestrictionsLocked(packageName, userId); 1310 } 1311 } 1312 1313 @Override 1314 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1315 int userId) { 1316 if (UserHandle.getCallingUserId() != userId 1317 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1318 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1319 } 1320 synchronized (mPackagesLock) { 1321 // Write the restrictions to XML 1322 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1323 } 1324 1325 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1326 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1327 changeIntent.setPackage(packageName); 1328 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1329 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1330 } 1331 1332 @Override 1333 public boolean setRestrictionsChallenge(String newPin) { 1334 checkManageUsersPermission("Only system can modify the restrictions pin"); 1335 int userId = UserHandle.getCallingUserId(); 1336 synchronized (mPackagesLock) { 1337 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1338 if (pinState == null) { 1339 pinState = new RestrictionsPinState(); 1340 } 1341 if (newPin == null) { 1342 pinState.salt = 0; 1343 pinState.pinHash = null; 1344 } else { 1345 try { 1346 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1347 } catch (NoSuchAlgorithmException e) { 1348 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1349 } 1350 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1351 pinState.failedAttempts = 0; 1352 } 1353 mRestrictionsPinStates.put(userId, pinState); 1354 writeUserLocked(mUsers.get(userId)); 1355 } 1356 return true; 1357 } 1358 1359 @Override 1360 public int checkRestrictionsChallenge(String pin) { 1361 checkManageUsersPermission("Only system can verify the restrictions pin"); 1362 int userId = UserHandle.getCallingUserId(); 1363 synchronized (mPackagesLock) { 1364 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1365 // If there's no pin set, return error code 1366 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1367 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1368 } else if (pin == null) { 1369 // If just checking if user can be prompted, return remaining time 1370 int waitTime = getRemainingTimeForPinAttempt(pinState); 1371 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1372 return waitTime; 1373 } else { 1374 int waitTime = getRemainingTimeForPinAttempt(pinState); 1375 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1376 if (waitTime > 0) { 1377 return waitTime; 1378 } 1379 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1380 pinState.failedAttempts = 0; 1381 writeUserLocked(mUsers.get(userId)); 1382 return UserManager.PIN_VERIFICATION_SUCCESS; 1383 } else { 1384 pinState.failedAttempts++; 1385 pinState.lastAttemptTime = System.currentTimeMillis(); 1386 writeUserLocked(mUsers.get(userId)); 1387 return waitTime; 1388 } 1389 } 1390 } 1391 } 1392 1393 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1394 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1395 BACKOFF_TIMES.length - 1); 1396 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1397 BACKOFF_TIMES[backoffIndex] : 0; 1398 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1399 0); 1400 } 1401 1402 @Override 1403 public boolean hasRestrictionsChallenge() { 1404 int userId = UserHandle.getCallingUserId(); 1405 synchronized (mPackagesLock) { 1406 return hasRestrictionsPinLocked(userId); 1407 } 1408 } 1409 1410 private boolean hasRestrictionsPinLocked(int userId) { 1411 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1412 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1413 return false; 1414 } 1415 return true; 1416 } 1417 1418 @Override 1419 public void removeRestrictions() { 1420 checkManageUsersPermission("Only system can remove restrictions"); 1421 final int userHandle = UserHandle.getCallingUserId(); 1422 removeRestrictionsForUser(userHandle, true); 1423 } 1424 1425 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1426 synchronized (mPackagesLock) { 1427 // Remove all user restrictions 1428 setUserRestrictions(new Bundle(), userHandle); 1429 // Remove restrictions pin 1430 setRestrictionsChallenge(null); 1431 // Remove any app restrictions 1432 cleanAppRestrictions(userHandle, true); 1433 } 1434 if (unblockApps) { 1435 unblockAllAppsForUser(userHandle); 1436 } 1437 } 1438 1439 private void unblockAllAppsForUser(final int userHandle) { 1440 mHandler.post(new Runnable() { 1441 @Override 1442 public void run() { 1443 List<ApplicationInfo> apps = 1444 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1445 userHandle).getList(); 1446 final long ident = Binder.clearCallingIdentity(); 1447 try { 1448 for (ApplicationInfo appInfo : apps) { 1449 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1450 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1451 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1452 userHandle); 1453 } 1454 } 1455 } finally { 1456 Binder.restoreCallingIdentity(ident); 1457 } 1458 } 1459 }); 1460 } 1461 1462 /* 1463 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1464 * Not the most secure, but it is at least a second level of protection. First level is that 1465 * the file is in a location only readable by the system process. 1466 * @param password the password. 1467 * @param salt the randomly generated salt 1468 * @return the hash of the pattern in a String. 1469 */ 1470 private String passwordToHash(String password, long salt) { 1471 if (password == null) { 1472 return null; 1473 } 1474 String algo = null; 1475 String hashed = salt + password; 1476 try { 1477 byte[] saltedPassword = (password + salt).getBytes(); 1478 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1479 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1480 hashed = toHex(sha1) + toHex(md5); 1481 } catch (NoSuchAlgorithmException e) { 1482 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1483 } 1484 return hashed; 1485 } 1486 1487 private static String toHex(byte[] ary) { 1488 final String hex = "0123456789ABCDEF"; 1489 String ret = ""; 1490 for (int i = 0; i < ary.length; i++) { 1491 ret += hex.charAt((ary[i] >> 4) & 0xf); 1492 ret += hex.charAt(ary[i] & 0xf); 1493 } 1494 return ret; 1495 } 1496 1497 private int getUidForPackage(String packageName) { 1498 long ident = Binder.clearCallingIdentity(); 1499 try { 1500 return mContext.getPackageManager().getApplicationInfo(packageName, 1501 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1502 } catch (NameNotFoundException nnfe) { 1503 return -1; 1504 } finally { 1505 Binder.restoreCallingIdentity(ident); 1506 } 1507 } 1508 1509 private Bundle readApplicationRestrictionsLocked(String packageName, 1510 int userId) { 1511 final Bundle restrictions = new Bundle(); 1512 final ArrayList<String> values = new ArrayList<String>(); 1513 1514 FileInputStream fis = null; 1515 try { 1516 AtomicFile restrictionsFile = 1517 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1518 packageToRestrictionsFileName(packageName))); 1519 fis = restrictionsFile.openRead(); 1520 XmlPullParser parser = Xml.newPullParser(); 1521 parser.setInput(fis, null); 1522 int type; 1523 while ((type = parser.next()) != XmlPullParser.START_TAG 1524 && type != XmlPullParser.END_DOCUMENT) { 1525 ; 1526 } 1527 1528 if (type != XmlPullParser.START_TAG) { 1529 Slog.e(LOG_TAG, "Unable to read restrictions file " 1530 + restrictionsFile.getBaseFile()); 1531 return restrictions; 1532 } 1533 1534 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1535 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1536 String key = parser.getAttributeValue(null, ATTR_KEY); 1537 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1538 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1539 if (multiple != null) { 1540 int count = Integer.parseInt(multiple); 1541 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1542 if (type == XmlPullParser.START_TAG 1543 && parser.getName().equals(TAG_VALUE)) { 1544 values.add(parser.nextText().trim()); 1545 count--; 1546 } 1547 } 1548 String [] valueStrings = new String[values.size()]; 1549 values.toArray(valueStrings); 1550 restrictions.putStringArray(key, valueStrings); 1551 } else { 1552 String value = parser.nextText().trim(); 1553 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1554 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1555 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1556 restrictions.putInt(key, Integer.parseInt(value)); 1557 } else { 1558 restrictions.putString(key, value); 1559 } 1560 } 1561 } 1562 } 1563 } catch (IOException ioe) { 1564 } catch (XmlPullParserException pe) { 1565 } finally { 1566 if (fis != null) { 1567 try { 1568 fis.close(); 1569 } catch (IOException e) { 1570 } 1571 } 1572 } 1573 return restrictions; 1574 } 1575 1576 private void writeApplicationRestrictionsLocked(String packageName, 1577 Bundle restrictions, int userId) { 1578 FileOutputStream fos = null; 1579 AtomicFile restrictionsFile = new AtomicFile( 1580 new File(Environment.getUserSystemDirectory(userId), 1581 packageToRestrictionsFileName(packageName))); 1582 try { 1583 fos = restrictionsFile.startWrite(); 1584 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1585 1586 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1587 final XmlSerializer serializer = new FastXmlSerializer(); 1588 serializer.setOutput(bos, "utf-8"); 1589 serializer.startDocument(null, true); 1590 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1591 1592 serializer.startTag(null, TAG_RESTRICTIONS); 1593 1594 for (String key : restrictions.keySet()) { 1595 Object value = restrictions.get(key); 1596 serializer.startTag(null, TAG_ENTRY); 1597 serializer.attribute(null, ATTR_KEY, key); 1598 1599 if (value instanceof Boolean) { 1600 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1601 serializer.text(value.toString()); 1602 } else if (value instanceof Integer) { 1603 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1604 serializer.text(value.toString()); 1605 } else if (value == null || value instanceof String) { 1606 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1607 serializer.text(value != null ? (String) value : ""); 1608 } else { 1609 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1610 String[] values = (String[]) value; 1611 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1612 for (String choice : values) { 1613 serializer.startTag(null, TAG_VALUE); 1614 serializer.text(choice != null ? choice : ""); 1615 serializer.endTag(null, TAG_VALUE); 1616 } 1617 } 1618 serializer.endTag(null, TAG_ENTRY); 1619 } 1620 1621 serializer.endTag(null, TAG_RESTRICTIONS); 1622 1623 serializer.endDocument(); 1624 restrictionsFile.finishWrite(fos); 1625 } catch (Exception e) { 1626 restrictionsFile.failWrite(fos); 1627 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1628 } 1629 } 1630 1631 @Override 1632 public int getUserSerialNumber(int userHandle) { 1633 synchronized (mPackagesLock) { 1634 if (!exists(userHandle)) return -1; 1635 return getUserInfoLocked(userHandle).serialNumber; 1636 } 1637 } 1638 1639 @Override 1640 public int getUserHandle(int userSerialNumber) { 1641 synchronized (mPackagesLock) { 1642 for (int userId : mUserIds) { 1643 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1644 } 1645 // Not found 1646 return -1; 1647 } 1648 } 1649 1650 /** 1651 * Caches the list of user ids in an array, adjusting the array size when necessary. 1652 */ 1653 private void updateUserIdsLocked() { 1654 int num = 0; 1655 for (int i = 0; i < mUsers.size(); i++) { 1656 if (!mUsers.valueAt(i).partial) { 1657 num++; 1658 } 1659 } 1660 final int[] newUsers = new int[num]; 1661 int n = 0; 1662 for (int i = 0; i < mUsers.size(); i++) { 1663 if (!mUsers.valueAt(i).partial) { 1664 newUsers[n++] = mUsers.keyAt(i); 1665 } 1666 } 1667 mUserIds = newUsers; 1668 } 1669 1670 /** 1671 * Make a note of the last started time of a user and do some cleanup. 1672 * @param userId the user that was just foregrounded 1673 */ 1674 public void userForeground(int userId) { 1675 synchronized (mPackagesLock) { 1676 UserInfo user = mUsers.get(userId); 1677 long now = System.currentTimeMillis(); 1678 if (user == null || user.partial) { 1679 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1680 return; 1681 } 1682 if (now > EPOCH_PLUS_30_YEARS) { 1683 user.lastLoggedInTime = now; 1684 writeUserLocked(user); 1685 } 1686 // If this is not a restricted profile and there is no restrictions pin, clean up 1687 // all restrictions files that might have been left behind, else clean up just the 1688 // ones with uninstalled packages 1689 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1690 final long salt = pinState == null ? 0 : pinState.salt; 1691 cleanAppRestrictions(userId, (!user.isRestricted() && salt == 0)); 1692 } 1693 } 1694 1695 /** 1696 * Returns the next available user id, filling in any holes in the ids. 1697 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1698 * for data and battery stats collection, or unexpected cross-talk. 1699 * @return 1700 */ 1701 private int getNextAvailableIdLocked() { 1702 synchronized (mPackagesLock) { 1703 int i = MIN_USER_ID; 1704 while (i < Integer.MAX_VALUE) { 1705 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1706 break; 1707 } 1708 i++; 1709 } 1710 return i; 1711 } 1712 } 1713 1714 private String packageToRestrictionsFileName(String packageName) { 1715 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1716 } 1717 1718 private String restrictionsFileNameToPackage(String fileName) { 1719 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1720 (int) (fileName.length() - XML_SUFFIX.length())); 1721 } 1722 1723 @Override 1724 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1725 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1726 != PackageManager.PERMISSION_GRANTED) { 1727 pw.println("Permission Denial: can't dump UserManager from from pid=" 1728 + Binder.getCallingPid() 1729 + ", uid=" + Binder.getCallingUid() 1730 + " without permission " 1731 + android.Manifest.permission.DUMP); 1732 return; 1733 } 1734 1735 long now = System.currentTimeMillis(); 1736 StringBuilder sb = new StringBuilder(); 1737 synchronized (mPackagesLock) { 1738 pw.println("Users:"); 1739 for (int i = 0; i < mUsers.size(); i++) { 1740 UserInfo user = mUsers.valueAt(i); 1741 if (user == null) continue; 1742 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1743 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1744 if (user.partial) pw.print(" <partial>"); 1745 pw.println(); 1746 pw.print(" Created: "); 1747 if (user.creationTime == 0) { 1748 pw.println("<unknown>"); 1749 } else { 1750 sb.setLength(0); 1751 TimeUtils.formatDuration(now - user.creationTime, sb); 1752 sb.append(" ago"); 1753 pw.println(sb); 1754 } 1755 pw.print(" Last logged in: "); 1756 if (user.lastLoggedInTime == 0) { 1757 pw.println("<unknown>"); 1758 } else { 1759 sb.setLength(0); 1760 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1761 sb.append(" ago"); 1762 pw.println(sb); 1763 } 1764 } 1765 } 1766 } 1767 1768 private PackageMonitor mUserPackageMonitor = new PackageMonitor() { 1769 @Override 1770 public void onPackageRemoved(String pkg, int uid) { 1771 final int userId = this.getChangingUserId(); 1772 // Package could be disappearing because it is being blocked, so also check if 1773 // it has been uninstalled. 1774 final boolean uninstalled = isPackageDisappearing(pkg) == PACKAGE_PERMANENT_CHANGE; 1775 if (uninstalled && userId >= 0 && !isPackageInstalled(pkg, userId)) { 1776 cleanAppRestrictionsForPackage(pkg, userId); 1777 } 1778 } 1779 }; 1780} 1781