UserManagerService.java revision 9a944532af0f07d8b916556d229c21d3eda91a59
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 long ident = Binder.clearCallingIdentity(); 398 try { 399 synchronized (mPackagesLock) { 400 UserInfo info = mUsers.get(userId); 401 if (info == null || info.partial) { 402 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 403 return; 404 } 405 writeBitmapLocked(info, bitmap); 406 writeUserLocked(info); 407 } 408 sendUserInfoChangedBroadcast(userId); 409 } finally { 410 Binder.restoreCallingIdentity(ident); 411 } 412 } 413 414 private void sendUserInfoChangedBroadcast(int userId) { 415 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 416 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 417 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 418 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 419 } 420 421 @Override 422 public Bitmap getUserIcon(int userId) { 423 synchronized (mPackagesLock) { 424 UserInfo info = mUsers.get(userId); 425 if (info == null || info.partial) { 426 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 427 return null; 428 } 429 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 430 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 431 || callingGroupId != info.profileGroupId) { 432 checkManageUsersPermission("get the icon of a user who is not related"); 433 } 434 if (info.iconPath == null) { 435 return null; 436 } 437 return BitmapFactory.decodeFile(info.iconPath); 438 } 439 } 440 441 public void makeInitialized(int userId) { 442 checkManageUsersPermission("makeInitialized"); 443 synchronized (mPackagesLock) { 444 UserInfo info = mUsers.get(userId); 445 if (info == null || info.partial) { 446 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 447 } 448 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 449 info.flags |= UserInfo.FLAG_INITIALIZED; 450 writeUserLocked(info); 451 } 452 } 453 } 454 455 @Override 456 public Bundle getDefaultGuestRestrictions() { 457 checkManageUsersPermission("getDefaultGuestRestrictions"); 458 synchronized (mPackagesLock) { 459 return new Bundle(mGuestRestrictions); 460 } 461 } 462 463 @Override 464 public void setDefaultGuestRestrictions(Bundle restrictions) { 465 checkManageUsersPermission("setDefaultGuestRestrictions"); 466 synchronized (mPackagesLock) { 467 mGuestRestrictions.clear(); 468 mGuestRestrictions.putAll(restrictions); 469 writeUserListLocked(); 470 } 471 } 472 473 @Override 474 public Bundle getUserRestrictions(int userId) { 475 // checkManageUsersPermission("getUserRestrictions"); 476 477 synchronized (mPackagesLock) { 478 Bundle restrictions = mUserRestrictions.get(userId); 479 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 480 } 481 } 482 483 @Override 484 public void setUserRestrictions(Bundle restrictions, int userId) { 485 checkManageUsersPermission("setUserRestrictions"); 486 if (restrictions == null) return; 487 488 synchronized (mPackagesLock) { 489 mUserRestrictions.get(userId).clear(); 490 mUserRestrictions.get(userId).putAll(restrictions); 491 long token = Binder.clearCallingIdentity(); 492 try { 493 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 494 } catch (RemoteException e) { 495 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 496 } finally { 497 Binder.restoreCallingIdentity(token); 498 } 499 writeUserLocked(mUsers.get(userId)); 500 } 501 } 502 503 /** 504 * Check if we've hit the limit of how many users can be created. 505 */ 506 private boolean isUserLimitReachedLocked() { 507 int aliveUserCount = 0; 508 final int totalUserCount = mUsers.size(); 509 // Skip over users being removed 510 for (int i = 0; i < totalUserCount; i++) { 511 UserInfo user = mUsers.valueAt(i); 512 if (!mRemovingUserIds.get(user.id)) { 513 aliveUserCount++; 514 } 515 } 516 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 517 } 518 519 /** 520 * Enforces that only the system UID or root's UID or apps that have the 521 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 522 * permission can make certain calls to the UserManager. 523 * 524 * @param message used as message if SecurityException is thrown 525 * @throws SecurityException if the caller is not system or root 526 */ 527 private static final void checkManageUsersPermission(String message) { 528 final int uid = Binder.getCallingUid(); 529 if (uid != Process.SYSTEM_UID && uid != 0 530 && ActivityManager.checkComponentPermission( 531 android.Manifest.permission.MANAGE_USERS, 532 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 533 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 534 } 535 } 536 537 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 538 try { 539 File dir = new File(mUsersDir, Integer.toString(info.id)); 540 File file = new File(dir, USER_PHOTO_FILENAME); 541 if (!dir.exists()) { 542 dir.mkdir(); 543 FileUtils.setPermissions( 544 dir.getPath(), 545 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 546 -1, -1); 547 } 548 FileOutputStream os; 549 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 550 info.iconPath = file.getAbsolutePath(); 551 } 552 try { 553 os.close(); 554 } catch (IOException ioe) { 555 // What the ... ! 556 } 557 } catch (FileNotFoundException e) { 558 Slog.w(LOG_TAG, "Error setting photo for user ", e); 559 } 560 } 561 562 /** 563 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 564 * cache it elsewhere. 565 * @return the array of user ids. 566 */ 567 public int[] getUserIds() { 568 synchronized (mPackagesLock) { 569 return mUserIds; 570 } 571 } 572 573 int[] getUserIdsLPr() { 574 return mUserIds; 575 } 576 577 private void readUserListLocked() { 578 if (!mUserListFile.exists()) { 579 fallbackToSingleUserLocked(); 580 return; 581 } 582 FileInputStream fis = null; 583 AtomicFile userListFile = new AtomicFile(mUserListFile); 584 try { 585 fis = userListFile.openRead(); 586 XmlPullParser parser = Xml.newPullParser(); 587 parser.setInput(fis, null); 588 int type; 589 while ((type = parser.next()) != XmlPullParser.START_TAG 590 && type != XmlPullParser.END_DOCUMENT) { 591 ; 592 } 593 594 if (type != XmlPullParser.START_TAG) { 595 Slog.e(LOG_TAG, "Unable to read user list"); 596 fallbackToSingleUserLocked(); 597 return; 598 } 599 600 mNextSerialNumber = -1; 601 if (parser.getName().equals(TAG_USERS)) { 602 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 603 if (lastSerialNumber != null) { 604 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 605 } 606 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 607 if (versionNumber != null) { 608 mUserVersion = Integer.parseInt(versionNumber); 609 } 610 } 611 612 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 613 if (type == XmlPullParser.START_TAG) { 614 final String name = parser.getName(); 615 if (name.equals(TAG_USER)) { 616 String id = parser.getAttributeValue(null, ATTR_ID); 617 UserInfo user = readUserLocked(Integer.parseInt(id)); 618 619 if (user != null) { 620 mUsers.put(user.id, user); 621 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 622 mNextSerialNumber = user.id + 1; 623 } 624 } 625 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 626 mGuestRestrictions.clear(); 627 readRestrictionsLocked(parser, mGuestRestrictions); 628 } 629 } 630 } 631 updateUserIdsLocked(); 632 upgradeIfNecessaryLocked(); 633 } catch (IOException ioe) { 634 fallbackToSingleUserLocked(); 635 } catch (XmlPullParserException pe) { 636 fallbackToSingleUserLocked(); 637 } finally { 638 if (fis != null) { 639 try { 640 fis.close(); 641 } catch (IOException e) { 642 } 643 } 644 } 645 } 646 647 /** 648 * Upgrade steps between versions, either for fixing bugs or changing the data format. 649 */ 650 private void upgradeIfNecessaryLocked() { 651 int userVersion = mUserVersion; 652 if (userVersion < 1) { 653 // Assign a proper name for the owner, if not initialized correctly before 654 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 655 if ("Primary".equals(user.name)) { 656 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 657 writeUserLocked(user); 658 } 659 userVersion = 1; 660 } 661 662 if (userVersion < 2) { 663 // Owner should be marked as initialized 664 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 665 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 666 user.flags |= UserInfo.FLAG_INITIALIZED; 667 writeUserLocked(user); 668 } 669 userVersion = 2; 670 } 671 672 673 if (userVersion < 4) { 674 userVersion = 4; 675 } 676 677 if (userVersion < USER_VERSION) { 678 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 679 + USER_VERSION); 680 } else { 681 mUserVersion = userVersion; 682 writeUserListLocked(); 683 } 684 } 685 686 private void fallbackToSingleUserLocked() { 687 // Create the primary user 688 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 689 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 690 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 691 mUsers.put(0, primary); 692 mNextSerialNumber = MIN_USER_ID; 693 mUserVersion = USER_VERSION; 694 695 Bundle restrictions = new Bundle(); 696 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 697 698 updateUserIdsLocked(); 699 700 writeUserListLocked(); 701 writeUserLocked(primary); 702 } 703 704 /* 705 * Writes the user file in this format: 706 * 707 * <user flags="20039023" id="0"> 708 * <name>Primary</name> 709 * </user> 710 */ 711 private void writeUserLocked(UserInfo userInfo) { 712 FileOutputStream fos = null; 713 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 714 try { 715 fos = userFile.startWrite(); 716 final BufferedOutputStream bos = new BufferedOutputStream(fos); 717 718 // XmlSerializer serializer = XmlUtils.serializerInstance(); 719 final XmlSerializer serializer = new FastXmlSerializer(); 720 serializer.setOutput(bos, "utf-8"); 721 serializer.startDocument(null, true); 722 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 723 724 serializer.startTag(null, TAG_USER); 725 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 726 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 727 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 728 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 729 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 730 Long.toString(userInfo.lastLoggedInTime)); 731 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 732 if (pinState != null) { 733 if (pinState.salt != 0) { 734 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 735 } 736 if (pinState.pinHash != null) { 737 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 738 } 739 if (pinState.failedAttempts != 0) { 740 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 741 Integer.toString(pinState.failedAttempts)); 742 serializer.attribute(null, ATTR_LAST_RETRY_MS, 743 Long.toString(pinState.lastAttemptTime)); 744 } 745 } 746 if (userInfo.iconPath != null) { 747 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 748 } 749 if (userInfo.partial) { 750 serializer.attribute(null, ATTR_PARTIAL, "true"); 751 } 752 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 753 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 754 Integer.toString(userInfo.profileGroupId)); 755 } 756 757 serializer.startTag(null, TAG_NAME); 758 serializer.text(userInfo.name); 759 serializer.endTag(null, TAG_NAME); 760 Bundle restrictions = mUserRestrictions.get(userInfo.id); 761 if (restrictions != null) { 762 writeRestrictionsLocked(serializer, restrictions); 763 } 764 serializer.endTag(null, TAG_USER); 765 766 serializer.endDocument(); 767 userFile.finishWrite(fos); 768 } catch (Exception ioe) { 769 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 770 userFile.failWrite(fos); 771 } 772 } 773 774 /* 775 * Writes the user list file in this format: 776 * 777 * <users nextSerialNumber="3"> 778 * <user id="0"></user> 779 * <user id="2"></user> 780 * </users> 781 */ 782 private void writeUserListLocked() { 783 FileOutputStream fos = null; 784 AtomicFile userListFile = new AtomicFile(mUserListFile); 785 try { 786 fos = userListFile.startWrite(); 787 final BufferedOutputStream bos = new BufferedOutputStream(fos); 788 789 // XmlSerializer serializer = XmlUtils.serializerInstance(); 790 final XmlSerializer serializer = new FastXmlSerializer(); 791 serializer.setOutput(bos, "utf-8"); 792 serializer.startDocument(null, true); 793 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 794 795 serializer.startTag(null, TAG_USERS); 796 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 797 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 798 799 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 800 writeRestrictionsLocked(serializer, mGuestRestrictions); 801 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 802 for (int i = 0; i < mUsers.size(); i++) { 803 UserInfo user = mUsers.valueAt(i); 804 serializer.startTag(null, TAG_USER); 805 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 806 serializer.endTag(null, TAG_USER); 807 } 808 809 serializer.endTag(null, TAG_USERS); 810 811 serializer.endDocument(); 812 userListFile.finishWrite(fos); 813 } catch (Exception e) { 814 userListFile.failWrite(fos); 815 Slog.e(LOG_TAG, "Error writing user list"); 816 } 817 } 818 819 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 820 throws IOException { 821 serializer.startTag(null, TAG_RESTRICTIONS); 822 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 823 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 824 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 825 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 826 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 827 writeBoolean(serializer, restrictions, 828 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 829 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 830 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 831 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 832 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 833 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 834 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 835 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 836 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 837 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 838 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 839 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 840 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 841 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 842 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 843 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 844 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 845 writeBoolean(serializer, restrictions, UserManager.DISALLOW_TELEPHONY); 846 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 847 serializer.endTag(null, TAG_RESTRICTIONS); 848 } 849 850 private UserInfo readUserLocked(int id) { 851 int flags = 0; 852 int serialNumber = id; 853 String name = null; 854 String iconPath = null; 855 long creationTime = 0L; 856 long lastLoggedInTime = 0L; 857 long salt = 0L; 858 String pinHash = null; 859 int failedAttempts = 0; 860 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 861 long lastAttemptTime = 0L; 862 boolean partial = false; 863 Bundle restrictions = new Bundle(); 864 865 FileInputStream fis = null; 866 try { 867 AtomicFile userFile = 868 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 869 fis = userFile.openRead(); 870 XmlPullParser parser = Xml.newPullParser(); 871 parser.setInput(fis, null); 872 int type; 873 while ((type = parser.next()) != XmlPullParser.START_TAG 874 && type != XmlPullParser.END_DOCUMENT) { 875 ; 876 } 877 878 if (type != XmlPullParser.START_TAG) { 879 Slog.e(LOG_TAG, "Unable to read user " + id); 880 return null; 881 } 882 883 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 884 int storedId = readIntAttribute(parser, ATTR_ID, -1); 885 if (storedId != id) { 886 Slog.e(LOG_TAG, "User id does not match the file name"); 887 return null; 888 } 889 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 890 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 891 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 892 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 893 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 894 salt = readLongAttribute(parser, ATTR_SALT, 0L); 895 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 896 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 897 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 898 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 899 UserInfo.NO_PROFILE_GROUP_ID); 900 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 901 // This attribute was added and renamed during development of L. 902 // TODO Remove upgrade path by 1st May 2014 903 profileGroupId = readIntAttribute(parser, "relatedGroupId", 904 UserInfo.NO_PROFILE_GROUP_ID); 905 } 906 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 907 if ("true".equals(valueString)) { 908 partial = true; 909 } 910 911 int outerDepth = parser.getDepth(); 912 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 913 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 914 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 915 continue; 916 } 917 String tag = parser.getName(); 918 if (TAG_NAME.equals(tag)) { 919 type = parser.next(); 920 if (type == XmlPullParser.TEXT) { 921 name = parser.getText(); 922 } 923 } else if (TAG_RESTRICTIONS.equals(tag)) { 924 readRestrictionsLocked(parser, restrictions); 925 } 926 } 927 } 928 929 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 930 userInfo.serialNumber = serialNumber; 931 userInfo.creationTime = creationTime; 932 userInfo.lastLoggedInTime = lastLoggedInTime; 933 userInfo.partial = partial; 934 userInfo.profileGroupId = profileGroupId; 935 mUserRestrictions.append(id, restrictions); 936 if (salt != 0L) { 937 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 938 if (pinState == null) { 939 pinState = new RestrictionsPinState(); 940 mRestrictionsPinStates.put(id, pinState); 941 } 942 pinState.salt = salt; 943 pinState.pinHash = pinHash; 944 pinState.failedAttempts = failedAttempts; 945 pinState.lastAttemptTime = lastAttemptTime; 946 } 947 return userInfo; 948 949 } catch (IOException ioe) { 950 } catch (XmlPullParserException pe) { 951 } finally { 952 if (fis != null) { 953 try { 954 fis.close(); 955 } catch (IOException e) { 956 } 957 } 958 } 959 return null; 960 } 961 962 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 963 throws IOException { 964 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 965 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 966 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 967 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 968 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 969 readBoolean(parser, restrictions, 970 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 971 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 972 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 973 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 974 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 975 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 976 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 977 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 978 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 979 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 980 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 981 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 982 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 983 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 984 readBoolean(parser, restrictions, 985 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 986 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 987 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 988 readBoolean(parser, restrictions, UserManager.DISALLOW_TELEPHONY); 989 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 990 } 991 992 private void readBoolean(XmlPullParser parser, Bundle restrictions, 993 String restrictionKey) { 994 String value = parser.getAttributeValue(null, restrictionKey); 995 if (value != null) { 996 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 997 } 998 } 999 1000 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1001 throws IOException { 1002 if (restrictions.containsKey(restrictionKey)) { 1003 xml.attribute(null, restrictionKey, 1004 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1005 } 1006 } 1007 1008 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1009 String valueString = parser.getAttributeValue(null, attr); 1010 if (valueString == null) return defaultValue; 1011 try { 1012 return Integer.parseInt(valueString); 1013 } catch (NumberFormatException nfe) { 1014 return defaultValue; 1015 } 1016 } 1017 1018 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1019 String valueString = parser.getAttributeValue(null, attr); 1020 if (valueString == null) return defaultValue; 1021 try { 1022 return Long.parseLong(valueString); 1023 } catch (NumberFormatException nfe) { 1024 return defaultValue; 1025 } 1026 } 1027 1028 private boolean isPackageInstalled(String pkg, int userId) { 1029 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1030 PackageManager.GET_UNINSTALLED_PACKAGES, 1031 userId); 1032 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1033 return false; 1034 } 1035 return true; 1036 } 1037 1038 /** 1039 * Removes all the restrictions files (res_<packagename>) for a given user, if all is true, 1040 * else removes only those packages that have been uninstalled. 1041 * Does not do any permissions checking. 1042 */ 1043 private void cleanAppRestrictions(int userId, boolean all) { 1044 synchronized (mPackagesLock) { 1045 File dir = Environment.getUserSystemDirectory(userId); 1046 String[] files = dir.list(); 1047 if (files == null) return; 1048 for (String fileName : files) { 1049 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1050 File resFile = new File(dir, fileName); 1051 if (resFile.exists()) { 1052 if (all) { 1053 resFile.delete(); 1054 } else { 1055 String pkg = restrictionsFileNameToPackage(fileName); 1056 if (!isPackageInstalled(pkg, userId)) { 1057 resFile.delete(); 1058 } 1059 } 1060 } 1061 } 1062 } 1063 } 1064 } 1065 1066 /** 1067 * Removes the app restrictions file for a specific package and user id, if it exists. 1068 */ 1069 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1070 synchronized (mPackagesLock) { 1071 File dir = Environment.getUserSystemDirectory(userId); 1072 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1073 if (resFile.exists()) { 1074 resFile.delete(); 1075 } 1076 } 1077 } 1078 1079 @Override 1080 public UserInfo createProfileForUser(String name, int flags, int userId) { 1081 checkManageUsersPermission("Only the system can create users"); 1082 if (userId != UserHandle.USER_OWNER) { 1083 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1084 return null; 1085 } 1086 return createUserInternal(name, flags, userId); 1087 } 1088 1089 @Override 1090 public UserInfo createUser(String name, int flags) { 1091 checkManageUsersPermission("Only the system can create users"); 1092 return createUserInternal(name, flags, UserHandle.USER_NULL); 1093 } 1094 1095 private UserInfo createUserInternal(String name, int flags, int parentId) { 1096 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1097 UserManager.DISALLOW_ADD_USER, false)) { 1098 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1099 return null; 1100 } 1101 final long ident = Binder.clearCallingIdentity(); 1102 UserInfo userInfo = null; 1103 try { 1104 synchronized (mInstallLock) { 1105 synchronized (mPackagesLock) { 1106 UserInfo parent = null; 1107 if (parentId != UserHandle.USER_NULL) { 1108 parent = getUserInfoLocked(parentId); 1109 if (parent == null) return null; 1110 } 1111 if (isUserLimitReachedLocked()) return null; 1112 int userId = getNextAvailableIdLocked(); 1113 userInfo = new UserInfo(userId, name, null, flags); 1114 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1115 userInfo.serialNumber = mNextSerialNumber++; 1116 long now = System.currentTimeMillis(); 1117 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1118 userInfo.partial = true; 1119 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1120 mUsers.put(userId, userInfo); 1121 writeUserListLocked(); 1122 if (parent != null) { 1123 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1124 parent.profileGroupId = parent.id; 1125 writeUserLocked(parent); 1126 } 1127 userInfo.profileGroupId = parent.profileGroupId; 1128 } 1129 writeUserLocked(userInfo); 1130 mPm.createNewUserLILPw(userId, userPath); 1131 userInfo.partial = false; 1132 writeUserLocked(userInfo); 1133 updateUserIdsLocked(); 1134 Bundle restrictions = new Bundle(); 1135 mUserRestrictions.append(userId, restrictions); 1136 } 1137 } 1138 if (userInfo != null) { 1139 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1140 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1141 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1142 android.Manifest.permission.MANAGE_USERS); 1143 } 1144 } finally { 1145 Binder.restoreCallingIdentity(ident); 1146 } 1147 return userInfo; 1148 } 1149 1150 /** 1151 * Removes a user and all data directories created for that user. This method should be called 1152 * after the user's processes have been terminated. 1153 * @param userHandle the user's id 1154 */ 1155 public boolean removeUser(int userHandle) { 1156 checkManageUsersPermission("Only the system can remove users"); 1157 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1158 UserManager.DISALLOW_REMOVE_USER, false)) { 1159 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1160 return false; 1161 } 1162 1163 long ident = Binder.clearCallingIdentity(); 1164 try { 1165 final UserInfo user; 1166 synchronized (mPackagesLock) { 1167 user = mUsers.get(userHandle); 1168 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1169 return false; 1170 } 1171 mRemovingUserIds.put(userHandle, true); 1172 try { 1173 mAppOpsService.removeUser(userHandle); 1174 } catch (RemoteException e) { 1175 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1176 } 1177 // Set this to a partially created user, so that the user will be purged 1178 // on next startup, in case the runtime stops now before stopping and 1179 // removing the user completely. 1180 user.partial = true; 1181 // Mark it as disabled, so that it isn't returned any more when 1182 // profiles are queried. 1183 user.flags |= UserInfo.FLAG_DISABLED; 1184 writeUserLocked(user); 1185 } 1186 1187 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1188 && user.isManagedProfile()) { 1189 // Send broadcast to notify system that the user removed was a 1190 // managed user. 1191 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1192 } 1193 1194 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1195 int res; 1196 try { 1197 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1198 new IStopUserCallback.Stub() { 1199 @Override 1200 public void userStopped(int userId) { 1201 finishRemoveUser(userId); 1202 } 1203 @Override 1204 public void userStopAborted(int userId) { 1205 } 1206 }); 1207 } catch (RemoteException e) { 1208 return false; 1209 } 1210 return res == ActivityManager.USER_OP_SUCCESS; 1211 } finally { 1212 Binder.restoreCallingIdentity(ident); 1213 } 1214 } 1215 1216 void finishRemoveUser(final int userHandle) { 1217 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1218 // Let other services shutdown any activity and clean up their state before completely 1219 // wiping the user's system directory and removing from the user list 1220 long ident = Binder.clearCallingIdentity(); 1221 try { 1222 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1223 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1224 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1225 android.Manifest.permission.MANAGE_USERS, 1226 1227 new BroadcastReceiver() { 1228 @Override 1229 public void onReceive(Context context, Intent intent) { 1230 if (DBG) { 1231 Slog.i(LOG_TAG, 1232 "USER_REMOVED broadcast sent, cleaning up user data " 1233 + userHandle); 1234 } 1235 new Thread() { 1236 public void run() { 1237 synchronized (mInstallLock) { 1238 synchronized (mPackagesLock) { 1239 removeUserStateLocked(userHandle); 1240 } 1241 } 1242 } 1243 }.start(); 1244 } 1245 }, 1246 1247 null, Activity.RESULT_OK, null, null); 1248 } finally { 1249 Binder.restoreCallingIdentity(ident); 1250 } 1251 } 1252 1253 private void removeUserStateLocked(final int userHandle) { 1254 // Cleanup package manager settings 1255 mPm.cleanUpUserLILPw(userHandle); 1256 1257 // Remove this user from the list 1258 mUsers.remove(userHandle); 1259 1260 // Have user ID linger for several seconds to let external storage VFS 1261 // cache entries expire. This must be greater than the 'entry_valid' 1262 // timeout used by the FUSE daemon. 1263 mHandler.postDelayed(new Runnable() { 1264 @Override 1265 public void run() { 1266 synchronized (mPackagesLock) { 1267 mRemovingUserIds.delete(userHandle); 1268 } 1269 } 1270 }, MINUTE_IN_MILLIS); 1271 1272 mRestrictionsPinStates.remove(userHandle); 1273 // Remove user file 1274 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1275 userFile.delete(); 1276 // Update the user list 1277 writeUserListLocked(); 1278 updateUserIdsLocked(); 1279 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1280 } 1281 1282 private void removeDirectoryRecursive(File parent) { 1283 if (parent.isDirectory()) { 1284 String[] files = parent.list(); 1285 for (String filename : files) { 1286 File child = new File(parent, filename); 1287 removeDirectoryRecursive(child); 1288 } 1289 } 1290 parent.delete(); 1291 } 1292 1293 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1294 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1295 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1296 Intent.FLAG_RECEIVER_FOREGROUND); 1297 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1298 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1299 } 1300 1301 @Override 1302 public Bundle getApplicationRestrictions(String packageName) { 1303 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1304 } 1305 1306 @Override 1307 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1308 if (UserHandle.getCallingUserId() != userId 1309 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1310 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1311 } 1312 synchronized (mPackagesLock) { 1313 // Read the restrictions from XML 1314 return readApplicationRestrictionsLocked(packageName, userId); 1315 } 1316 } 1317 1318 @Override 1319 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1320 int userId) { 1321 if (UserHandle.getCallingUserId() != userId 1322 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1323 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1324 } 1325 synchronized (mPackagesLock) { 1326 // Write the restrictions to XML 1327 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1328 } 1329 1330 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1331 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1332 changeIntent.setPackage(packageName); 1333 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1334 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1335 } 1336 1337 @Override 1338 public boolean setRestrictionsChallenge(String newPin) { 1339 checkManageUsersPermission("Only system can modify the restrictions pin"); 1340 int userId = UserHandle.getCallingUserId(); 1341 synchronized (mPackagesLock) { 1342 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1343 if (pinState == null) { 1344 pinState = new RestrictionsPinState(); 1345 } 1346 if (newPin == null) { 1347 pinState.salt = 0; 1348 pinState.pinHash = null; 1349 } else { 1350 try { 1351 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1352 } catch (NoSuchAlgorithmException e) { 1353 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1354 } 1355 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1356 pinState.failedAttempts = 0; 1357 } 1358 mRestrictionsPinStates.put(userId, pinState); 1359 writeUserLocked(mUsers.get(userId)); 1360 } 1361 return true; 1362 } 1363 1364 @Override 1365 public int checkRestrictionsChallenge(String pin) { 1366 checkManageUsersPermission("Only system can verify the restrictions pin"); 1367 int userId = UserHandle.getCallingUserId(); 1368 synchronized (mPackagesLock) { 1369 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1370 // If there's no pin set, return error code 1371 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1372 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1373 } else if (pin == null) { 1374 // If just checking if user can be prompted, return remaining time 1375 int waitTime = getRemainingTimeForPinAttempt(pinState); 1376 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1377 return waitTime; 1378 } else { 1379 int waitTime = getRemainingTimeForPinAttempt(pinState); 1380 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1381 if (waitTime > 0) { 1382 return waitTime; 1383 } 1384 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1385 pinState.failedAttempts = 0; 1386 writeUserLocked(mUsers.get(userId)); 1387 return UserManager.PIN_VERIFICATION_SUCCESS; 1388 } else { 1389 pinState.failedAttempts++; 1390 pinState.lastAttemptTime = System.currentTimeMillis(); 1391 writeUserLocked(mUsers.get(userId)); 1392 return waitTime; 1393 } 1394 } 1395 } 1396 } 1397 1398 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1399 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1400 BACKOFF_TIMES.length - 1); 1401 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1402 BACKOFF_TIMES[backoffIndex] : 0; 1403 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1404 0); 1405 } 1406 1407 @Override 1408 public boolean hasRestrictionsChallenge() { 1409 int userId = UserHandle.getCallingUserId(); 1410 synchronized (mPackagesLock) { 1411 return hasRestrictionsPinLocked(userId); 1412 } 1413 } 1414 1415 private boolean hasRestrictionsPinLocked(int userId) { 1416 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1417 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1418 return false; 1419 } 1420 return true; 1421 } 1422 1423 @Override 1424 public void removeRestrictions() { 1425 checkManageUsersPermission("Only system can remove restrictions"); 1426 final int userHandle = UserHandle.getCallingUserId(); 1427 removeRestrictionsForUser(userHandle, true); 1428 } 1429 1430 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1431 synchronized (mPackagesLock) { 1432 // Remove all user restrictions 1433 setUserRestrictions(new Bundle(), userHandle); 1434 // Remove restrictions pin 1435 setRestrictionsChallenge(null); 1436 // Remove any app restrictions 1437 cleanAppRestrictions(userHandle, true); 1438 } 1439 if (unblockApps) { 1440 unblockAllAppsForUser(userHandle); 1441 } 1442 } 1443 1444 private void unblockAllAppsForUser(final int userHandle) { 1445 mHandler.post(new Runnable() { 1446 @Override 1447 public void run() { 1448 List<ApplicationInfo> apps = 1449 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1450 userHandle).getList(); 1451 final long ident = Binder.clearCallingIdentity(); 1452 try { 1453 for (ApplicationInfo appInfo : apps) { 1454 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1455 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1456 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1457 userHandle); 1458 } 1459 } 1460 } finally { 1461 Binder.restoreCallingIdentity(ident); 1462 } 1463 } 1464 }); 1465 } 1466 1467 /* 1468 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1469 * Not the most secure, but it is at least a second level of protection. First level is that 1470 * the file is in a location only readable by the system process. 1471 * @param password the password. 1472 * @param salt the randomly generated salt 1473 * @return the hash of the pattern in a String. 1474 */ 1475 private String passwordToHash(String password, long salt) { 1476 if (password == null) { 1477 return null; 1478 } 1479 String algo = null; 1480 String hashed = salt + password; 1481 try { 1482 byte[] saltedPassword = (password + salt).getBytes(); 1483 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1484 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1485 hashed = toHex(sha1) + toHex(md5); 1486 } catch (NoSuchAlgorithmException e) { 1487 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1488 } 1489 return hashed; 1490 } 1491 1492 private static String toHex(byte[] ary) { 1493 final String hex = "0123456789ABCDEF"; 1494 String ret = ""; 1495 for (int i = 0; i < ary.length; i++) { 1496 ret += hex.charAt((ary[i] >> 4) & 0xf); 1497 ret += hex.charAt(ary[i] & 0xf); 1498 } 1499 return ret; 1500 } 1501 1502 private int getUidForPackage(String packageName) { 1503 long ident = Binder.clearCallingIdentity(); 1504 try { 1505 return mContext.getPackageManager().getApplicationInfo(packageName, 1506 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1507 } catch (NameNotFoundException nnfe) { 1508 return -1; 1509 } finally { 1510 Binder.restoreCallingIdentity(ident); 1511 } 1512 } 1513 1514 private Bundle readApplicationRestrictionsLocked(String packageName, 1515 int userId) { 1516 final Bundle restrictions = new Bundle(); 1517 final ArrayList<String> values = new ArrayList<String>(); 1518 1519 FileInputStream fis = null; 1520 try { 1521 AtomicFile restrictionsFile = 1522 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1523 packageToRestrictionsFileName(packageName))); 1524 fis = restrictionsFile.openRead(); 1525 XmlPullParser parser = Xml.newPullParser(); 1526 parser.setInput(fis, null); 1527 int type; 1528 while ((type = parser.next()) != XmlPullParser.START_TAG 1529 && type != XmlPullParser.END_DOCUMENT) { 1530 ; 1531 } 1532 1533 if (type != XmlPullParser.START_TAG) { 1534 Slog.e(LOG_TAG, "Unable to read restrictions file " 1535 + restrictionsFile.getBaseFile()); 1536 return restrictions; 1537 } 1538 1539 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1540 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1541 String key = parser.getAttributeValue(null, ATTR_KEY); 1542 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1543 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1544 if (multiple != null) { 1545 int count = Integer.parseInt(multiple); 1546 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1547 if (type == XmlPullParser.START_TAG 1548 && parser.getName().equals(TAG_VALUE)) { 1549 values.add(parser.nextText().trim()); 1550 count--; 1551 } 1552 } 1553 String [] valueStrings = new String[values.size()]; 1554 values.toArray(valueStrings); 1555 restrictions.putStringArray(key, valueStrings); 1556 } else { 1557 String value = parser.nextText().trim(); 1558 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1559 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1560 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1561 restrictions.putInt(key, Integer.parseInt(value)); 1562 } else { 1563 restrictions.putString(key, value); 1564 } 1565 } 1566 } 1567 } 1568 } catch (IOException ioe) { 1569 } catch (XmlPullParserException pe) { 1570 } finally { 1571 if (fis != null) { 1572 try { 1573 fis.close(); 1574 } catch (IOException e) { 1575 } 1576 } 1577 } 1578 return restrictions; 1579 } 1580 1581 private void writeApplicationRestrictionsLocked(String packageName, 1582 Bundle restrictions, int userId) { 1583 FileOutputStream fos = null; 1584 AtomicFile restrictionsFile = new AtomicFile( 1585 new File(Environment.getUserSystemDirectory(userId), 1586 packageToRestrictionsFileName(packageName))); 1587 try { 1588 fos = restrictionsFile.startWrite(); 1589 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1590 1591 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1592 final XmlSerializer serializer = new FastXmlSerializer(); 1593 serializer.setOutput(bos, "utf-8"); 1594 serializer.startDocument(null, true); 1595 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1596 1597 serializer.startTag(null, TAG_RESTRICTIONS); 1598 1599 for (String key : restrictions.keySet()) { 1600 Object value = restrictions.get(key); 1601 serializer.startTag(null, TAG_ENTRY); 1602 serializer.attribute(null, ATTR_KEY, key); 1603 1604 if (value instanceof Boolean) { 1605 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1606 serializer.text(value.toString()); 1607 } else if (value instanceof Integer) { 1608 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1609 serializer.text(value.toString()); 1610 } else if (value == null || value instanceof String) { 1611 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1612 serializer.text(value != null ? (String) value : ""); 1613 } else { 1614 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1615 String[] values = (String[]) value; 1616 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1617 for (String choice : values) { 1618 serializer.startTag(null, TAG_VALUE); 1619 serializer.text(choice != null ? choice : ""); 1620 serializer.endTag(null, TAG_VALUE); 1621 } 1622 } 1623 serializer.endTag(null, TAG_ENTRY); 1624 } 1625 1626 serializer.endTag(null, TAG_RESTRICTIONS); 1627 1628 serializer.endDocument(); 1629 restrictionsFile.finishWrite(fos); 1630 } catch (Exception e) { 1631 restrictionsFile.failWrite(fos); 1632 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1633 } 1634 } 1635 1636 @Override 1637 public int getUserSerialNumber(int userHandle) { 1638 synchronized (mPackagesLock) { 1639 if (!exists(userHandle)) return -1; 1640 return getUserInfoLocked(userHandle).serialNumber; 1641 } 1642 } 1643 1644 @Override 1645 public int getUserHandle(int userSerialNumber) { 1646 synchronized (mPackagesLock) { 1647 for (int userId : mUserIds) { 1648 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1649 } 1650 // Not found 1651 return -1; 1652 } 1653 } 1654 1655 /** 1656 * Caches the list of user ids in an array, adjusting the array size when necessary. 1657 */ 1658 private void updateUserIdsLocked() { 1659 int num = 0; 1660 for (int i = 0; i < mUsers.size(); i++) { 1661 if (!mUsers.valueAt(i).partial) { 1662 num++; 1663 } 1664 } 1665 final int[] newUsers = new int[num]; 1666 int n = 0; 1667 for (int i = 0; i < mUsers.size(); i++) { 1668 if (!mUsers.valueAt(i).partial) { 1669 newUsers[n++] = mUsers.keyAt(i); 1670 } 1671 } 1672 mUserIds = newUsers; 1673 } 1674 1675 /** 1676 * Make a note of the last started time of a user and do some cleanup. 1677 * @param userId the user that was just foregrounded 1678 */ 1679 public void userForeground(int userId) { 1680 synchronized (mPackagesLock) { 1681 UserInfo user = mUsers.get(userId); 1682 long now = System.currentTimeMillis(); 1683 if (user == null || user.partial) { 1684 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1685 return; 1686 } 1687 if (now > EPOCH_PLUS_30_YEARS) { 1688 user.lastLoggedInTime = now; 1689 writeUserLocked(user); 1690 } 1691 // If this is not a restricted profile and there is no restrictions pin, clean up 1692 // all restrictions files that might have been left behind, else clean up just the 1693 // ones with uninstalled packages 1694 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1695 final long salt = pinState == null ? 0 : pinState.salt; 1696 cleanAppRestrictions(userId, (!user.isRestricted() && salt == 0)); 1697 } 1698 } 1699 1700 /** 1701 * Returns the next available user id, filling in any holes in the ids. 1702 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1703 * for data and battery stats collection, or unexpected cross-talk. 1704 * @return 1705 */ 1706 private int getNextAvailableIdLocked() { 1707 synchronized (mPackagesLock) { 1708 int i = MIN_USER_ID; 1709 while (i < Integer.MAX_VALUE) { 1710 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1711 break; 1712 } 1713 i++; 1714 } 1715 return i; 1716 } 1717 } 1718 1719 private String packageToRestrictionsFileName(String packageName) { 1720 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1721 } 1722 1723 private String restrictionsFileNameToPackage(String fileName) { 1724 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1725 (int) (fileName.length() - XML_SUFFIX.length())); 1726 } 1727 1728 @Override 1729 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1730 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1731 != PackageManager.PERMISSION_GRANTED) { 1732 pw.println("Permission Denial: can't dump UserManager from from pid=" 1733 + Binder.getCallingPid() 1734 + ", uid=" + Binder.getCallingUid() 1735 + " without permission " 1736 + android.Manifest.permission.DUMP); 1737 return; 1738 } 1739 1740 long now = System.currentTimeMillis(); 1741 StringBuilder sb = new StringBuilder(); 1742 synchronized (mPackagesLock) { 1743 pw.println("Users:"); 1744 for (int i = 0; i < mUsers.size(); i++) { 1745 UserInfo user = mUsers.valueAt(i); 1746 if (user == null) continue; 1747 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1748 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1749 if (user.partial) pw.print(" <partial>"); 1750 pw.println(); 1751 pw.print(" Created: "); 1752 if (user.creationTime == 0) { 1753 pw.println("<unknown>"); 1754 } else { 1755 sb.setLength(0); 1756 TimeUtils.formatDuration(now - user.creationTime, sb); 1757 sb.append(" ago"); 1758 pw.println(sb); 1759 } 1760 pw.print(" Last logged in: "); 1761 if (user.lastLoggedInTime == 0) { 1762 pw.println("<unknown>"); 1763 } else { 1764 sb.setLength(0); 1765 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1766 sb.append(" ago"); 1767 pw.println(sb); 1768 } 1769 } 1770 } 1771 } 1772 1773 private PackageMonitor mUserPackageMonitor = new PackageMonitor() { 1774 @Override 1775 public void onPackageRemoved(String pkg, int uid) { 1776 final int userId = this.getChangingUserId(); 1777 // Package could be disappearing because it is being blocked, so also check if 1778 // it has been uninstalled. 1779 final boolean uninstalled = isPackageDisappearing(pkg) == PACKAGE_PERMANENT_CHANGE; 1780 if (uninstalled && userId >= 0 && !isPackageInstalled(pkg, userId)) { 1781 cleanAppRestrictionsForPackage(pkg, userId); 1782 } 1783 } 1784 }; 1785} 1786