UserManagerService.java revision d21b2181390fb96e3a0742be9b985a52d4de2d2c
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.util.ArrayUtils; 56import com.android.internal.util.FastXmlSerializer; 57 58import org.xmlpull.v1.XmlPullParser; 59import org.xmlpull.v1.XmlPullParserException; 60import org.xmlpull.v1.XmlSerializer; 61 62import java.io.BufferedOutputStream; 63import java.io.File; 64import java.io.FileDescriptor; 65import java.io.FileInputStream; 66import java.io.FileNotFoundException; 67import java.io.FileOutputStream; 68import java.io.IOException; 69import java.io.PrintWriter; 70import java.security.MessageDigest; 71import java.security.NoSuchAlgorithmException; 72import java.security.SecureRandom; 73import java.util.ArrayList; 74import java.util.List; 75 76public class UserManagerService extends IUserManager.Stub { 77 78 private static final String LOG_TAG = "UserManagerService"; 79 80 private static final boolean DBG = false; 81 82 private static final String TAG_NAME = "name"; 83 private static final String ATTR_FLAGS = "flags"; 84 private static final String ATTR_ICON_PATH = "icon"; 85 private static final String ATTR_ID = "id"; 86 private static final String ATTR_CREATION_TIME = "created"; 87 private static final String ATTR_LAST_LOGGED_IN_TIME = "lastLoggedIn"; 88 private static final String ATTR_SALT = "salt"; 89 private static final String ATTR_PIN_HASH = "pinHash"; 90 private static final String ATTR_FAILED_ATTEMPTS = "failedAttempts"; 91 private static final String ATTR_LAST_RETRY_MS = "lastAttemptMs"; 92 private static final String ATTR_SERIAL_NO = "serialNumber"; 93 private static final String ATTR_NEXT_SERIAL_NO = "nextSerialNumber"; 94 private static final String ATTR_PARTIAL = "partial"; 95 private static final String ATTR_USER_VERSION = "version"; 96 private static final String ATTR_PROFILE_GROUP_ID = "profileGroupId"; 97 private static final String TAG_GUEST_RESTRICTIONS = "guestRestrictions"; 98 private static final String TAG_USERS = "users"; 99 private static final String TAG_USER = "user"; 100 private static final String TAG_RESTRICTIONS = "restrictions"; 101 private static final String TAG_ENTRY = "entry"; 102 private static final String TAG_VALUE = "value"; 103 private static final String ATTR_KEY = "key"; 104 private static final String ATTR_VALUE_TYPE = "type"; 105 private static final String ATTR_MULTIPLE = "m"; 106 107 private static final String ATTR_TYPE_STRING_ARRAY = "sa"; 108 private static final String ATTR_TYPE_STRING = "s"; 109 private static final String ATTR_TYPE_BOOLEAN = "b"; 110 private static final String ATTR_TYPE_INTEGER = "i"; 111 112 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 113 private static final String USER_LIST_FILENAME = "userlist.xml"; 114 private static final String USER_PHOTO_FILENAME = "photo.png"; 115 116 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 117 private static final String XML_SUFFIX = ".xml"; 118 119 private static final int MIN_USER_ID = 10; 120 121 private static final int USER_VERSION = 4; 122 123 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 124 125 // Number of attempts before jumping to the next BACKOFF_TIMES slot 126 private static final int BACKOFF_INC_INTERVAL = 5; 127 128 // Amount of time to force the user to wait before entering the PIN again, after failing 129 // BACKOFF_INC_INTERVAL times. 130 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 131 132 133 private final Context mContext; 134 private final PackageManagerService mPm; 135 private final Object mInstallLock; 136 private final Object mPackagesLock; 137 138 private final Handler mHandler; 139 140 private final File mUsersDir; 141 private final File mUserListFile; 142 private final File mBaseUserPath; 143 144 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 145 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 146 private final Bundle mGuestRestrictions = new Bundle(); 147 148 class RestrictionsPinState { 149 long salt; 150 String pinHash; 151 int failedAttempts; 152 long lastAttemptTime; 153 } 154 155 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 156 new SparseArray<RestrictionsPinState>(); 157 158 /** 159 * Set of user IDs being actively removed. Removed IDs linger in this set 160 * for several seconds to work around a VFS caching issue. 161 */ 162 // @GuardedBy("mPackagesLock") 163 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 164 165 private int[] mUserIds; 166 private int mNextSerialNumber; 167 private int mUserVersion = 0; 168 169 private IAppOpsService mAppOpsService; 170 171 private static UserManagerService sInstance; 172 173 public static UserManagerService getInstance() { 174 synchronized (UserManagerService.class) { 175 return sInstance; 176 } 177 } 178 179 /** 180 * Available for testing purposes. 181 */ 182 UserManagerService(File dataDir, File baseUserPath) { 183 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 184 } 185 186 /** 187 * Called by package manager to create the service. This is closely 188 * associated with the package manager, and the given lock is the 189 * package manager's own lock. 190 */ 191 UserManagerService(Context context, PackageManagerService pm, 192 Object installLock, Object packagesLock) { 193 this(context, pm, installLock, packagesLock, 194 Environment.getDataDirectory(), 195 new File(Environment.getDataDirectory(), "user")); 196 } 197 198 /** 199 * Available for testing purposes. 200 */ 201 private UserManagerService(Context context, PackageManagerService pm, 202 Object installLock, Object packagesLock, 203 File dataDir, File baseUserPath) { 204 mContext = context; 205 mPm = pm; 206 mInstallLock = installLock; 207 mPackagesLock = packagesLock; 208 mHandler = new Handler(); 209 synchronized (mInstallLock) { 210 synchronized (mPackagesLock) { 211 mUsersDir = new File(dataDir, USER_INFO_DIR); 212 mUsersDir.mkdirs(); 213 // Make zeroth user directory, for services to migrate their files to that location 214 File userZeroDir = new File(mUsersDir, "0"); 215 userZeroDir.mkdirs(); 216 mBaseUserPath = baseUserPath; 217 FileUtils.setPermissions(mUsersDir.toString(), 218 FileUtils.S_IRWXU|FileUtils.S_IRWXG 219 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 220 -1, -1); 221 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 222 readUserListLocked(); 223 // Prune out any partially created/partially removed users. 224 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 225 for (int i = 0; i < mUsers.size(); i++) { 226 UserInfo ui = mUsers.valueAt(i); 227 if (ui.partial && i != 0) { 228 partials.add(ui); 229 } 230 } 231 for (int i = 0; i < partials.size(); i++) { 232 UserInfo ui = partials.get(i); 233 Slog.w(LOG_TAG, "Removing partially created user #" + i 234 + " (name=" + ui.name + ")"); 235 removeUserStateLocked(ui.id); 236 } 237 sInstance = this; 238 } 239 } 240 } 241 242 void systemReady() { 243 userForeground(UserHandle.USER_OWNER); 244 mAppOpsService = IAppOpsService.Stub.asInterface( 245 ServiceManager.getService(Context.APP_OPS_SERVICE)); 246 for (int i = 0; i < mUserIds.length; ++i) { 247 try { 248 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 249 } catch (RemoteException e) { 250 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 251 } 252 } 253 } 254 255 @Override 256 public List<UserInfo> getUsers(boolean excludeDying) { 257 checkManageUsersPermission("query users"); 258 synchronized (mPackagesLock) { 259 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 260 for (int i = 0; i < mUsers.size(); i++) { 261 UserInfo ui = mUsers.valueAt(i); 262 if (ui.partial) { 263 continue; 264 } 265 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 266 users.add(ui); 267 } 268 } 269 return users; 270 } 271 } 272 273 @Override 274 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 275 if (userId != UserHandle.getCallingUserId()) { 276 checkManageUsersPermission("getting profiles related to user " + userId); 277 } 278 final long ident = Binder.clearCallingIdentity(); 279 try { 280 synchronized (mPackagesLock) { 281 return getProfilesLocked(userId, enabledOnly); 282 } 283 } finally { 284 Binder.restoreCallingIdentity(ident); 285 } 286 } 287 288 /** Assume permissions already checked and caller's identity cleared */ 289 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 290 UserInfo user = getUserInfoLocked(userId); 291 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 292 for (int i = 0; i < mUsers.size(); i++) { 293 UserInfo profile = mUsers.valueAt(i); 294 if (!isProfileOf(user, profile)) { 295 continue; 296 } 297 if (enabledOnly && !profile.isEnabled()) { 298 continue; 299 } 300 if (mRemovingUserIds.get(profile.id)) { 301 continue; 302 } 303 users.add(profile); 304 } 305 return users; 306 } 307 308 @Override 309 public UserInfo getProfileParent(int userHandle) { 310 checkManageUsersPermission("get the profile parent"); 311 synchronized (mPackagesLock) { 312 UserInfo profile = getUserInfoLocked(userHandle); 313 int parentUserId = profile.profileGroupId; 314 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 315 return null; 316 } else { 317 return getUserInfoLocked(parentUserId); 318 } 319 } 320 } 321 322 private boolean isProfileOf(UserInfo user, UserInfo profile) { 323 return user.id == profile.id || 324 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 325 && user.profileGroupId == profile.profileGroupId); 326 } 327 328 @Override 329 public void setUserEnabled(int userId) { 330 checkManageUsersPermission("enable user"); 331 synchronized (mPackagesLock) { 332 UserInfo info = getUserInfoLocked(userId); 333 if (info != null && !info.isEnabled()) { 334 info.flags ^= UserInfo.FLAG_DISABLED; 335 writeUserLocked(info); 336 } 337 } 338 } 339 340 @Override 341 public UserInfo getUserInfo(int userId) { 342 checkManageUsersPermission("query user"); 343 synchronized (mPackagesLock) { 344 return getUserInfoLocked(userId); 345 } 346 } 347 348 @Override 349 public boolean isRestricted() { 350 synchronized (mPackagesLock) { 351 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 352 } 353 } 354 355 /* 356 * Should be locked on mUsers before calling this. 357 */ 358 private UserInfo getUserInfoLocked(int userId) { 359 UserInfo ui = mUsers.get(userId); 360 // If it is partial and not in the process of being removed, return as unknown user. 361 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 362 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 363 return null; 364 } 365 return ui; 366 } 367 368 public boolean exists(int userId) { 369 synchronized (mPackagesLock) { 370 return ArrayUtils.contains(mUserIds, userId); 371 } 372 } 373 374 @Override 375 public void setUserName(int userId, String name) { 376 checkManageUsersPermission("rename users"); 377 boolean changed = false; 378 synchronized (mPackagesLock) { 379 UserInfo info = mUsers.get(userId); 380 if (info == null || info.partial) { 381 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 382 return; 383 } 384 if (name != null && !name.equals(info.name)) { 385 info.name = name; 386 writeUserLocked(info); 387 changed = true; 388 } 389 } 390 if (changed) { 391 sendUserInfoChangedBroadcast(userId); 392 } 393 } 394 395 @Override 396 public void setUserIcon(int userId, Bitmap bitmap) { 397 checkManageUsersPermission("update users"); 398 long ident = Binder.clearCallingIdentity(); 399 try { 400 synchronized (mPackagesLock) { 401 UserInfo info = mUsers.get(userId); 402 if (info == null || info.partial) { 403 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 404 return; 405 } 406 writeBitmapLocked(info, bitmap); 407 writeUserLocked(info); 408 } 409 sendUserInfoChangedBroadcast(userId); 410 } finally { 411 Binder.restoreCallingIdentity(ident); 412 } 413 } 414 415 private void sendUserInfoChangedBroadcast(int userId) { 416 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 417 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 418 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 419 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 420 } 421 422 @Override 423 public Bitmap getUserIcon(int userId) { 424 synchronized (mPackagesLock) { 425 UserInfo info = mUsers.get(userId); 426 if (info == null || info.partial) { 427 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 428 return null; 429 } 430 int callingGroupId = mUsers.get(UserHandle.getCallingUserId()).profileGroupId; 431 if (callingGroupId == UserInfo.NO_PROFILE_GROUP_ID 432 || callingGroupId != info.profileGroupId) { 433 checkManageUsersPermission("get the icon of a user who is not related"); 434 } 435 if (info.iconPath == null) { 436 return null; 437 } 438 return BitmapFactory.decodeFile(info.iconPath); 439 } 440 } 441 442 public void makeInitialized(int userId) { 443 checkManageUsersPermission("makeInitialized"); 444 synchronized (mPackagesLock) { 445 UserInfo info = mUsers.get(userId); 446 if (info == null || info.partial) { 447 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 448 } 449 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 450 info.flags |= UserInfo.FLAG_INITIALIZED; 451 writeUserLocked(info); 452 } 453 } 454 } 455 456 @Override 457 public Bundle getDefaultGuestRestrictions() { 458 checkManageUsersPermission("getDefaultGuestRestrictions"); 459 synchronized (mPackagesLock) { 460 return new Bundle(mGuestRestrictions); 461 } 462 } 463 464 @Override 465 public void setDefaultGuestRestrictions(Bundle restrictions) { 466 checkManageUsersPermission("setDefaultGuestRestrictions"); 467 synchronized (mPackagesLock) { 468 mGuestRestrictions.clear(); 469 mGuestRestrictions.putAll(restrictions); 470 writeUserListLocked(); 471 } 472 } 473 474 @Override 475 public Bundle getUserRestrictions(int userId) { 476 // checkManageUsersPermission("getUserRestrictions"); 477 478 synchronized (mPackagesLock) { 479 Bundle restrictions = mUserRestrictions.get(userId); 480 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 481 } 482 } 483 484 @Override 485 public void setUserRestrictions(Bundle restrictions, int userId) { 486 checkManageUsersPermission("setUserRestrictions"); 487 if (restrictions == null) return; 488 489 synchronized (mPackagesLock) { 490 mUserRestrictions.get(userId).clear(); 491 mUserRestrictions.get(userId).putAll(restrictions); 492 long token = Binder.clearCallingIdentity(); 493 try { 494 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 495 } catch (RemoteException e) { 496 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 497 } finally { 498 Binder.restoreCallingIdentity(token); 499 } 500 writeUserLocked(mUsers.get(userId)); 501 } 502 } 503 504 /** 505 * Check if we've hit the limit of how many users can be created. 506 */ 507 private boolean isUserLimitReachedLocked() { 508 int aliveUserCount = 0; 509 final int totalUserCount = mUsers.size(); 510 // Skip over users being removed 511 for (int i = 0; i < totalUserCount; i++) { 512 UserInfo user = mUsers.valueAt(i); 513 if (!mRemovingUserIds.get(user.id)) { 514 aliveUserCount++; 515 } 516 } 517 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 518 } 519 520 /** 521 * Enforces that only the system UID or root's UID or apps that have the 522 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 523 * permission can make certain calls to the UserManager. 524 * 525 * @param message used as message if SecurityException is thrown 526 * @throws SecurityException if the caller is not system or root 527 */ 528 private static final void checkManageUsersPermission(String message) { 529 final int uid = Binder.getCallingUid(); 530 if (uid != Process.SYSTEM_UID && uid != 0 531 && ActivityManager.checkComponentPermission( 532 android.Manifest.permission.MANAGE_USERS, 533 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 534 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 535 } 536 } 537 538 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 539 try { 540 File dir = new File(mUsersDir, Integer.toString(info.id)); 541 File file = new File(dir, USER_PHOTO_FILENAME); 542 if (!dir.exists()) { 543 dir.mkdir(); 544 FileUtils.setPermissions( 545 dir.getPath(), 546 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 547 -1, -1); 548 } 549 FileOutputStream os; 550 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 551 info.iconPath = file.getAbsolutePath(); 552 } 553 try { 554 os.close(); 555 } catch (IOException ioe) { 556 // What the ... ! 557 } 558 } catch (FileNotFoundException e) { 559 Slog.w(LOG_TAG, "Error setting photo for user ", e); 560 } 561 } 562 563 /** 564 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 565 * cache it elsewhere. 566 * @return the array of user ids. 567 */ 568 public int[] getUserIds() { 569 synchronized (mPackagesLock) { 570 return mUserIds; 571 } 572 } 573 574 int[] getUserIdsLPr() { 575 return mUserIds; 576 } 577 578 private void readUserListLocked() { 579 if (!mUserListFile.exists()) { 580 fallbackToSingleUserLocked(); 581 return; 582 } 583 FileInputStream fis = null; 584 AtomicFile userListFile = new AtomicFile(mUserListFile); 585 try { 586 fis = userListFile.openRead(); 587 XmlPullParser parser = Xml.newPullParser(); 588 parser.setInput(fis, null); 589 int type; 590 while ((type = parser.next()) != XmlPullParser.START_TAG 591 && type != XmlPullParser.END_DOCUMENT) { 592 ; 593 } 594 595 if (type != XmlPullParser.START_TAG) { 596 Slog.e(LOG_TAG, "Unable to read user list"); 597 fallbackToSingleUserLocked(); 598 return; 599 } 600 601 mNextSerialNumber = -1; 602 if (parser.getName().equals(TAG_USERS)) { 603 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 604 if (lastSerialNumber != null) { 605 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 606 } 607 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 608 if (versionNumber != null) { 609 mUserVersion = Integer.parseInt(versionNumber); 610 } 611 } 612 613 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 614 if (type == XmlPullParser.START_TAG) { 615 final String name = parser.getName(); 616 if (name.equals(TAG_USER)) { 617 String id = parser.getAttributeValue(null, ATTR_ID); 618 UserInfo user = readUserLocked(Integer.parseInt(id)); 619 620 if (user != null) { 621 mUsers.put(user.id, user); 622 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 623 mNextSerialNumber = user.id + 1; 624 } 625 } 626 } else if (name.equals(TAG_GUEST_RESTRICTIONS)) { 627 mGuestRestrictions.clear(); 628 readRestrictionsLocked(parser, mGuestRestrictions); 629 } 630 } 631 } 632 updateUserIdsLocked(); 633 upgradeIfNecessaryLocked(); 634 } catch (IOException ioe) { 635 fallbackToSingleUserLocked(); 636 } catch (XmlPullParserException pe) { 637 fallbackToSingleUserLocked(); 638 } finally { 639 if (fis != null) { 640 try { 641 fis.close(); 642 } catch (IOException e) { 643 } 644 } 645 } 646 } 647 648 /** 649 * Upgrade steps between versions, either for fixing bugs or changing the data format. 650 */ 651 private void upgradeIfNecessaryLocked() { 652 int userVersion = mUserVersion; 653 if (userVersion < 1) { 654 // Assign a proper name for the owner, if not initialized correctly before 655 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 656 if ("Primary".equals(user.name)) { 657 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 658 writeUserLocked(user); 659 } 660 userVersion = 1; 661 } 662 663 if (userVersion < 2) { 664 // Owner should be marked as initialized 665 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 666 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 667 user.flags |= UserInfo.FLAG_INITIALIZED; 668 writeUserLocked(user); 669 } 670 userVersion = 2; 671 } 672 673 674 if (userVersion < 4) { 675 userVersion = 4; 676 } 677 678 if (userVersion < USER_VERSION) { 679 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 680 + USER_VERSION); 681 } else { 682 mUserVersion = userVersion; 683 writeUserListLocked(); 684 } 685 } 686 687 private void fallbackToSingleUserLocked() { 688 // Create the primary user 689 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 690 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 691 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 692 mUsers.put(0, primary); 693 mNextSerialNumber = MIN_USER_ID; 694 mUserVersion = USER_VERSION; 695 696 Bundle restrictions = new Bundle(); 697 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 698 699 updateUserIdsLocked(); 700 701 writeUserListLocked(); 702 writeUserLocked(primary); 703 } 704 705 /* 706 * Writes the user file in this format: 707 * 708 * <user flags="20039023" id="0"> 709 * <name>Primary</name> 710 * </user> 711 */ 712 private void writeUserLocked(UserInfo userInfo) { 713 FileOutputStream fos = null; 714 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 715 try { 716 fos = userFile.startWrite(); 717 final BufferedOutputStream bos = new BufferedOutputStream(fos); 718 719 // XmlSerializer serializer = XmlUtils.serializerInstance(); 720 final XmlSerializer serializer = new FastXmlSerializer(); 721 serializer.setOutput(bos, "utf-8"); 722 serializer.startDocument(null, true); 723 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 724 725 serializer.startTag(null, TAG_USER); 726 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 727 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 728 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 729 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 730 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 731 Long.toString(userInfo.lastLoggedInTime)); 732 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 733 if (pinState != null) { 734 if (pinState.salt != 0) { 735 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 736 } 737 if (pinState.pinHash != null) { 738 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 739 } 740 if (pinState.failedAttempts != 0) { 741 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 742 Integer.toString(pinState.failedAttempts)); 743 serializer.attribute(null, ATTR_LAST_RETRY_MS, 744 Long.toString(pinState.lastAttemptTime)); 745 } 746 } 747 if (userInfo.iconPath != null) { 748 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 749 } 750 if (userInfo.partial) { 751 serializer.attribute(null, ATTR_PARTIAL, "true"); 752 } 753 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 754 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 755 Integer.toString(userInfo.profileGroupId)); 756 } 757 758 serializer.startTag(null, TAG_NAME); 759 serializer.text(userInfo.name); 760 serializer.endTag(null, TAG_NAME); 761 Bundle restrictions = mUserRestrictions.get(userInfo.id); 762 if (restrictions != null) { 763 writeRestrictionsLocked(serializer, restrictions); 764 } 765 serializer.endTag(null, TAG_USER); 766 767 serializer.endDocument(); 768 userFile.finishWrite(fos); 769 } catch (Exception ioe) { 770 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 771 userFile.failWrite(fos); 772 } 773 } 774 775 /* 776 * Writes the user list file in this format: 777 * 778 * <users nextSerialNumber="3"> 779 * <user id="0"></user> 780 * <user id="2"></user> 781 * </users> 782 */ 783 private void writeUserListLocked() { 784 FileOutputStream fos = null; 785 AtomicFile userListFile = new AtomicFile(mUserListFile); 786 try { 787 fos = userListFile.startWrite(); 788 final BufferedOutputStream bos = new BufferedOutputStream(fos); 789 790 // XmlSerializer serializer = XmlUtils.serializerInstance(); 791 final XmlSerializer serializer = new FastXmlSerializer(); 792 serializer.setOutput(bos, "utf-8"); 793 serializer.startDocument(null, true); 794 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 795 796 serializer.startTag(null, TAG_USERS); 797 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 798 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 799 800 serializer.startTag(null, TAG_GUEST_RESTRICTIONS); 801 writeRestrictionsLocked(serializer, mGuestRestrictions); 802 serializer.endTag(null, TAG_GUEST_RESTRICTIONS); 803 for (int i = 0; i < mUsers.size(); i++) { 804 UserInfo user = mUsers.valueAt(i); 805 serializer.startTag(null, TAG_USER); 806 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 807 serializer.endTag(null, TAG_USER); 808 } 809 810 serializer.endTag(null, TAG_USERS); 811 812 serializer.endDocument(); 813 userListFile.finishWrite(fos); 814 } catch (Exception e) { 815 userListFile.failWrite(fos); 816 Slog.e(LOG_TAG, "Error writing user list"); 817 } 818 } 819 820 private void writeRestrictionsLocked(XmlSerializer serializer, Bundle restrictions) 821 throws IOException { 822 serializer.startTag(null, TAG_RESTRICTIONS); 823 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 824 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 825 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 826 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 827 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 828 writeBoolean(serializer, restrictions, 829 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 830 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 831 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 832 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 833 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 834 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 835 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 836 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 837 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 838 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 839 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 840 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 841 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 842 writeBoolean(serializer, restrictions, UserManager.DISALLOW_APPS_CONTROL); 843 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 844 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 845 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 846 writeBoolean(serializer, restrictions, UserManager.DISALLOW_TELEPHONY); 847 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 848 serializer.endTag(null, TAG_RESTRICTIONS); 849 } 850 851 private UserInfo readUserLocked(int id) { 852 int flags = 0; 853 int serialNumber = id; 854 String name = null; 855 String iconPath = null; 856 long creationTime = 0L; 857 long lastLoggedInTime = 0L; 858 long salt = 0L; 859 String pinHash = null; 860 int failedAttempts = 0; 861 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 862 long lastAttemptTime = 0L; 863 boolean partial = false; 864 Bundle restrictions = new Bundle(); 865 866 FileInputStream fis = null; 867 try { 868 AtomicFile userFile = 869 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 870 fis = userFile.openRead(); 871 XmlPullParser parser = Xml.newPullParser(); 872 parser.setInput(fis, null); 873 int type; 874 while ((type = parser.next()) != XmlPullParser.START_TAG 875 && type != XmlPullParser.END_DOCUMENT) { 876 ; 877 } 878 879 if (type != XmlPullParser.START_TAG) { 880 Slog.e(LOG_TAG, "Unable to read user " + id); 881 return null; 882 } 883 884 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 885 int storedId = readIntAttribute(parser, ATTR_ID, -1); 886 if (storedId != id) { 887 Slog.e(LOG_TAG, "User id does not match the file name"); 888 return null; 889 } 890 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 891 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 892 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 893 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 894 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 895 salt = readLongAttribute(parser, ATTR_SALT, 0L); 896 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 897 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 898 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 899 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 900 UserInfo.NO_PROFILE_GROUP_ID); 901 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 902 // This attribute was added and renamed during development of L. 903 // TODO Remove upgrade path by 1st May 2014 904 profileGroupId = readIntAttribute(parser, "relatedGroupId", 905 UserInfo.NO_PROFILE_GROUP_ID); 906 } 907 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 908 if ("true".equals(valueString)) { 909 partial = true; 910 } 911 912 int outerDepth = parser.getDepth(); 913 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 914 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 915 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 916 continue; 917 } 918 String tag = parser.getName(); 919 if (TAG_NAME.equals(tag)) { 920 type = parser.next(); 921 if (type == XmlPullParser.TEXT) { 922 name = parser.getText(); 923 } 924 } else if (TAG_RESTRICTIONS.equals(tag)) { 925 readRestrictionsLocked(parser, restrictions); 926 } 927 } 928 } 929 930 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 931 userInfo.serialNumber = serialNumber; 932 userInfo.creationTime = creationTime; 933 userInfo.lastLoggedInTime = lastLoggedInTime; 934 userInfo.partial = partial; 935 userInfo.profileGroupId = profileGroupId; 936 mUserRestrictions.append(id, restrictions); 937 if (salt != 0L) { 938 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 939 if (pinState == null) { 940 pinState = new RestrictionsPinState(); 941 mRestrictionsPinStates.put(id, pinState); 942 } 943 pinState.salt = salt; 944 pinState.pinHash = pinHash; 945 pinState.failedAttempts = failedAttempts; 946 pinState.lastAttemptTime = lastAttemptTime; 947 } 948 return userInfo; 949 950 } catch (IOException ioe) { 951 } catch (XmlPullParserException pe) { 952 } finally { 953 if (fis != null) { 954 try { 955 fis.close(); 956 } catch (IOException e) { 957 } 958 } 959 } 960 return null; 961 } 962 963 private void readRestrictionsLocked(XmlPullParser parser, Bundle restrictions) 964 throws IOException { 965 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 966 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 967 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 968 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 969 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 970 readBoolean(parser, restrictions, 971 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 972 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 973 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 974 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 975 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 976 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 977 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 978 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 979 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 980 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 981 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 982 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 983 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 984 readBoolean(parser, restrictions, UserManager.DISALLOW_APPS_CONTROL); 985 readBoolean(parser, restrictions, 986 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 987 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 988 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 989 readBoolean(parser, restrictions, UserManager.DISALLOW_TELEPHONY); 990 readBoolean(parser, restrictions, UserManager.DISALLOW_CREATE_WINDOWS); 991 } 992 993 private void readBoolean(XmlPullParser parser, Bundle restrictions, 994 String restrictionKey) { 995 String value = parser.getAttributeValue(null, restrictionKey); 996 if (value != null) { 997 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 998 } 999 } 1000 1001 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 1002 throws IOException { 1003 if (restrictions.containsKey(restrictionKey)) { 1004 xml.attribute(null, restrictionKey, 1005 Boolean.toString(restrictions.getBoolean(restrictionKey))); 1006 } 1007 } 1008 1009 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1010 String valueString = parser.getAttributeValue(null, attr); 1011 if (valueString == null) return defaultValue; 1012 try { 1013 return Integer.parseInt(valueString); 1014 } catch (NumberFormatException nfe) { 1015 return defaultValue; 1016 } 1017 } 1018 1019 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1020 String valueString = parser.getAttributeValue(null, attr); 1021 if (valueString == null) return defaultValue; 1022 try { 1023 return Long.parseLong(valueString); 1024 } catch (NumberFormatException nfe) { 1025 return defaultValue; 1026 } 1027 } 1028 1029 private boolean isPackageInstalled(String pkg, int userId) { 1030 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1031 PackageManager.GET_UNINSTALLED_PACKAGES, 1032 userId); 1033 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1034 return false; 1035 } 1036 return true; 1037 } 1038 1039 /** 1040 * Removes all the restrictions files (res_<packagename>) for a given user. 1041 * Does not do any permissions checking. 1042 */ 1043 private void cleanAppRestrictions(int userId) { 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 resFile.delete(); 1053 } 1054 } 1055 } 1056 } 1057 } 1058 1059 /** 1060 * Removes the app restrictions file for a specific package and user id, if it exists. 1061 */ 1062 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1063 synchronized (mPackagesLock) { 1064 File dir = Environment.getUserSystemDirectory(userId); 1065 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1066 if (resFile.exists()) { 1067 resFile.delete(); 1068 } 1069 } 1070 } 1071 1072 @Override 1073 public UserInfo createProfileForUser(String name, int flags, int userId) { 1074 checkManageUsersPermission("Only the system can create users"); 1075 if (userId != UserHandle.USER_OWNER) { 1076 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1077 return null; 1078 } 1079 return createUserInternal(name, flags, userId); 1080 } 1081 1082 @Override 1083 public UserInfo createUser(String name, int flags) { 1084 checkManageUsersPermission("Only the system can create users"); 1085 return createUserInternal(name, flags, UserHandle.USER_NULL); 1086 } 1087 1088 private UserInfo createUserInternal(String name, int flags, int parentId) { 1089 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1090 UserManager.DISALLOW_ADD_USER, false)) { 1091 Log.w(LOG_TAG, "Cannot add user. DISALLOW_ADD_USER is enabled."); 1092 return null; 1093 } 1094 final long ident = Binder.clearCallingIdentity(); 1095 UserInfo userInfo = null; 1096 try { 1097 synchronized (mInstallLock) { 1098 synchronized (mPackagesLock) { 1099 UserInfo parent = null; 1100 if (parentId != UserHandle.USER_NULL) { 1101 parent = getUserInfoLocked(parentId); 1102 if (parent == null) return null; 1103 } 1104 if (isUserLimitReachedLocked()) return null; 1105 int userId = getNextAvailableIdLocked(); 1106 userInfo = new UserInfo(userId, name, null, flags); 1107 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1108 userInfo.serialNumber = mNextSerialNumber++; 1109 long now = System.currentTimeMillis(); 1110 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1111 userInfo.partial = true; 1112 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1113 mUsers.put(userId, userInfo); 1114 writeUserListLocked(); 1115 if (parent != null) { 1116 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1117 parent.profileGroupId = parent.id; 1118 writeUserLocked(parent); 1119 } 1120 userInfo.profileGroupId = parent.profileGroupId; 1121 } 1122 writeUserLocked(userInfo); 1123 mPm.createNewUserLILPw(userId, userPath); 1124 userInfo.partial = false; 1125 writeUserLocked(userInfo); 1126 updateUserIdsLocked(); 1127 Bundle restrictions = new Bundle(); 1128 mUserRestrictions.append(userId, restrictions); 1129 } 1130 } 1131 if (userInfo != null) { 1132 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1133 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1134 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1135 android.Manifest.permission.MANAGE_USERS); 1136 } 1137 } finally { 1138 Binder.restoreCallingIdentity(ident); 1139 } 1140 return userInfo; 1141 } 1142 1143 /** 1144 * Removes a user and all data directories created for that user. This method should be called 1145 * after the user's processes have been terminated. 1146 * @param userHandle the user's id 1147 */ 1148 public boolean removeUser(int userHandle) { 1149 checkManageUsersPermission("Only the system can remove users"); 1150 if (getUserRestrictions(UserHandle.getCallingUserId()).getBoolean( 1151 UserManager.DISALLOW_REMOVE_USER, false)) { 1152 Log.w(LOG_TAG, "Cannot remove user. DISALLOW_REMOVE_USER is enabled."); 1153 return false; 1154 } 1155 1156 long ident = Binder.clearCallingIdentity(); 1157 try { 1158 final UserInfo user; 1159 synchronized (mPackagesLock) { 1160 user = mUsers.get(userHandle); 1161 if (userHandle == 0 || user == null || mRemovingUserIds.get(userHandle)) { 1162 return false; 1163 } 1164 mRemovingUserIds.put(userHandle, true); 1165 try { 1166 mAppOpsService.removeUser(userHandle); 1167 } catch (RemoteException e) { 1168 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1169 } 1170 // Set this to a partially created user, so that the user will be purged 1171 // on next startup, in case the runtime stops now before stopping and 1172 // removing the user completely. 1173 user.partial = true; 1174 // Mark it as disabled, so that it isn't returned any more when 1175 // profiles are queried. 1176 user.flags |= UserInfo.FLAG_DISABLED; 1177 writeUserLocked(user); 1178 } 1179 1180 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1181 && user.isManagedProfile()) { 1182 // Send broadcast to notify system that the user removed was a 1183 // managed user. 1184 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1185 } 1186 1187 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1188 int res; 1189 try { 1190 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1191 new IStopUserCallback.Stub() { 1192 @Override 1193 public void userStopped(int userId) { 1194 finishRemoveUser(userId); 1195 } 1196 @Override 1197 public void userStopAborted(int userId) { 1198 } 1199 }); 1200 } catch (RemoteException e) { 1201 return false; 1202 } 1203 return res == ActivityManager.USER_OP_SUCCESS; 1204 } finally { 1205 Binder.restoreCallingIdentity(ident); 1206 } 1207 } 1208 1209 void finishRemoveUser(final int userHandle) { 1210 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1211 // Let other services shutdown any activity and clean up their state before completely 1212 // wiping the user's system directory and removing from the user list 1213 long ident = Binder.clearCallingIdentity(); 1214 try { 1215 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1216 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1217 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1218 android.Manifest.permission.MANAGE_USERS, 1219 1220 new BroadcastReceiver() { 1221 @Override 1222 public void onReceive(Context context, Intent intent) { 1223 if (DBG) { 1224 Slog.i(LOG_TAG, 1225 "USER_REMOVED broadcast sent, cleaning up user data " 1226 + userHandle); 1227 } 1228 new Thread() { 1229 public void run() { 1230 synchronized (mInstallLock) { 1231 synchronized (mPackagesLock) { 1232 removeUserStateLocked(userHandle); 1233 } 1234 } 1235 } 1236 }.start(); 1237 } 1238 }, 1239 1240 null, Activity.RESULT_OK, null, null); 1241 } finally { 1242 Binder.restoreCallingIdentity(ident); 1243 } 1244 } 1245 1246 private void removeUserStateLocked(final int userHandle) { 1247 // Cleanup package manager settings 1248 mPm.cleanUpUserLILPw(userHandle); 1249 1250 // Remove this user from the list 1251 mUsers.remove(userHandle); 1252 1253 // Have user ID linger for several seconds to let external storage VFS 1254 // cache entries expire. This must be greater than the 'entry_valid' 1255 // timeout used by the FUSE daemon. 1256 mHandler.postDelayed(new Runnable() { 1257 @Override 1258 public void run() { 1259 synchronized (mPackagesLock) { 1260 mRemovingUserIds.delete(userHandle); 1261 } 1262 } 1263 }, MINUTE_IN_MILLIS); 1264 1265 mRestrictionsPinStates.remove(userHandle); 1266 // Remove user file 1267 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1268 userFile.delete(); 1269 // Update the user list 1270 writeUserListLocked(); 1271 updateUserIdsLocked(); 1272 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1273 } 1274 1275 private void removeDirectoryRecursive(File parent) { 1276 if (parent.isDirectory()) { 1277 String[] files = parent.list(); 1278 for (String filename : files) { 1279 File child = new File(parent, filename); 1280 removeDirectoryRecursive(child); 1281 } 1282 } 1283 parent.delete(); 1284 } 1285 1286 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1287 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1288 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1289 Intent.FLAG_RECEIVER_FOREGROUND); 1290 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1291 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1292 } 1293 1294 @Override 1295 public Bundle getApplicationRestrictions(String packageName) { 1296 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1297 } 1298 1299 @Override 1300 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1301 if (UserHandle.getCallingUserId() != userId 1302 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1303 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1304 } 1305 synchronized (mPackagesLock) { 1306 // Read the restrictions from XML 1307 return readApplicationRestrictionsLocked(packageName, userId); 1308 } 1309 } 1310 1311 @Override 1312 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1313 int userId) { 1314 if (UserHandle.getCallingUserId() != userId 1315 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1316 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1317 } 1318 synchronized (mPackagesLock) { 1319 if (restrictions == null || restrictions.isEmpty()) { 1320 cleanAppRestrictionsForPackage(packageName, userId); 1321 } else { 1322 // Write the restrictions to XML 1323 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1324 } 1325 } 1326 1327 if (isPackageInstalled(packageName, userId)) { 1328 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1329 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1330 changeIntent.setPackage(packageName); 1331 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1332 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1333 } 1334 } 1335 1336 @Override 1337 public boolean setRestrictionsChallenge(String newPin) { 1338 checkManageUsersPermission("Only system can modify the restrictions pin"); 1339 int userId = UserHandle.getCallingUserId(); 1340 synchronized (mPackagesLock) { 1341 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1342 if (pinState == null) { 1343 pinState = new RestrictionsPinState(); 1344 } 1345 if (newPin == null) { 1346 pinState.salt = 0; 1347 pinState.pinHash = null; 1348 } else { 1349 try { 1350 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1351 } catch (NoSuchAlgorithmException e) { 1352 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1353 } 1354 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1355 pinState.failedAttempts = 0; 1356 } 1357 mRestrictionsPinStates.put(userId, pinState); 1358 writeUserLocked(mUsers.get(userId)); 1359 } 1360 return true; 1361 } 1362 1363 @Override 1364 public int checkRestrictionsChallenge(String pin) { 1365 checkManageUsersPermission("Only system can verify the restrictions pin"); 1366 int userId = UserHandle.getCallingUserId(); 1367 synchronized (mPackagesLock) { 1368 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1369 // If there's no pin set, return error code 1370 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1371 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1372 } else if (pin == null) { 1373 // If just checking if user can be prompted, return remaining time 1374 int waitTime = getRemainingTimeForPinAttempt(pinState); 1375 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1376 return waitTime; 1377 } else { 1378 int waitTime = getRemainingTimeForPinAttempt(pinState); 1379 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1380 if (waitTime > 0) { 1381 return waitTime; 1382 } 1383 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1384 pinState.failedAttempts = 0; 1385 writeUserLocked(mUsers.get(userId)); 1386 return UserManager.PIN_VERIFICATION_SUCCESS; 1387 } else { 1388 pinState.failedAttempts++; 1389 pinState.lastAttemptTime = System.currentTimeMillis(); 1390 writeUserLocked(mUsers.get(userId)); 1391 return waitTime; 1392 } 1393 } 1394 } 1395 } 1396 1397 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1398 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1399 BACKOFF_TIMES.length - 1); 1400 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1401 BACKOFF_TIMES[backoffIndex] : 0; 1402 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1403 0); 1404 } 1405 1406 @Override 1407 public boolean hasRestrictionsChallenge() { 1408 int userId = UserHandle.getCallingUserId(); 1409 synchronized (mPackagesLock) { 1410 return hasRestrictionsPinLocked(userId); 1411 } 1412 } 1413 1414 private boolean hasRestrictionsPinLocked(int userId) { 1415 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1416 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1417 return false; 1418 } 1419 return true; 1420 } 1421 1422 @Override 1423 public void removeRestrictions() { 1424 checkManageUsersPermission("Only system can remove restrictions"); 1425 final int userHandle = UserHandle.getCallingUserId(); 1426 removeRestrictionsForUser(userHandle, true); 1427 } 1428 1429 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1430 synchronized (mPackagesLock) { 1431 // Remove all user restrictions 1432 setUserRestrictions(new Bundle(), userHandle); 1433 // Remove restrictions pin 1434 setRestrictionsChallenge(null); 1435 // Remove any app restrictions 1436 cleanAppRestrictions(userHandle); 1437 } 1438 if (unblockApps) { 1439 unblockAllAppsForUser(userHandle); 1440 } 1441 } 1442 1443 private void unblockAllAppsForUser(final int userHandle) { 1444 mHandler.post(new Runnable() { 1445 @Override 1446 public void run() { 1447 List<ApplicationInfo> apps = 1448 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1449 userHandle).getList(); 1450 final long ident = Binder.clearCallingIdentity(); 1451 try { 1452 for (ApplicationInfo appInfo : apps) { 1453 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1454 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1455 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1456 userHandle); 1457 } 1458 } 1459 } finally { 1460 Binder.restoreCallingIdentity(ident); 1461 } 1462 } 1463 }); 1464 } 1465 1466 /* 1467 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1468 * Not the most secure, but it is at least a second level of protection. First level is that 1469 * the file is in a location only readable by the system process. 1470 * @param password the password. 1471 * @param salt the randomly generated salt 1472 * @return the hash of the pattern in a String. 1473 */ 1474 private String passwordToHash(String password, long salt) { 1475 if (password == null) { 1476 return null; 1477 } 1478 String algo = null; 1479 String hashed = salt + password; 1480 try { 1481 byte[] saltedPassword = (password + salt).getBytes(); 1482 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1483 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1484 hashed = toHex(sha1) + toHex(md5); 1485 } catch (NoSuchAlgorithmException e) { 1486 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1487 } 1488 return hashed; 1489 } 1490 1491 private static String toHex(byte[] ary) { 1492 final String hex = "0123456789ABCDEF"; 1493 String ret = ""; 1494 for (int i = 0; i < ary.length; i++) { 1495 ret += hex.charAt((ary[i] >> 4) & 0xf); 1496 ret += hex.charAt(ary[i] & 0xf); 1497 } 1498 return ret; 1499 } 1500 1501 private int getUidForPackage(String packageName) { 1502 long ident = Binder.clearCallingIdentity(); 1503 try { 1504 return mContext.getPackageManager().getApplicationInfo(packageName, 1505 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1506 } catch (NameNotFoundException nnfe) { 1507 return -1; 1508 } finally { 1509 Binder.restoreCallingIdentity(ident); 1510 } 1511 } 1512 1513 private Bundle readApplicationRestrictionsLocked(String packageName, 1514 int userId) { 1515 final Bundle restrictions = new Bundle(); 1516 final ArrayList<String> values = new ArrayList<String>(); 1517 1518 FileInputStream fis = null; 1519 try { 1520 AtomicFile restrictionsFile = 1521 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1522 packageToRestrictionsFileName(packageName))); 1523 fis = restrictionsFile.openRead(); 1524 XmlPullParser parser = Xml.newPullParser(); 1525 parser.setInput(fis, null); 1526 int type; 1527 while ((type = parser.next()) != XmlPullParser.START_TAG 1528 && type != XmlPullParser.END_DOCUMENT) { 1529 ; 1530 } 1531 1532 if (type != XmlPullParser.START_TAG) { 1533 Slog.e(LOG_TAG, "Unable to read restrictions file " 1534 + restrictionsFile.getBaseFile()); 1535 return restrictions; 1536 } 1537 1538 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1539 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1540 String key = parser.getAttributeValue(null, ATTR_KEY); 1541 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1542 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1543 if (multiple != null) { 1544 int count = Integer.parseInt(multiple); 1545 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1546 if (type == XmlPullParser.START_TAG 1547 && parser.getName().equals(TAG_VALUE)) { 1548 values.add(parser.nextText().trim()); 1549 count--; 1550 } 1551 } 1552 String [] valueStrings = new String[values.size()]; 1553 values.toArray(valueStrings); 1554 restrictions.putStringArray(key, valueStrings); 1555 } else { 1556 String value = parser.nextText().trim(); 1557 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1558 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1559 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1560 restrictions.putInt(key, Integer.parseInt(value)); 1561 } else { 1562 restrictions.putString(key, value); 1563 } 1564 } 1565 } 1566 } 1567 } catch (IOException ioe) { 1568 } catch (XmlPullParserException pe) { 1569 } finally { 1570 if (fis != null) { 1571 try { 1572 fis.close(); 1573 } catch (IOException e) { 1574 } 1575 } 1576 } 1577 return restrictions; 1578 } 1579 1580 private void writeApplicationRestrictionsLocked(String packageName, 1581 Bundle restrictions, int userId) { 1582 FileOutputStream fos = null; 1583 AtomicFile restrictionsFile = new AtomicFile( 1584 new File(Environment.getUserSystemDirectory(userId), 1585 packageToRestrictionsFileName(packageName))); 1586 try { 1587 fos = restrictionsFile.startWrite(); 1588 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1589 1590 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1591 final XmlSerializer serializer = new FastXmlSerializer(); 1592 serializer.setOutput(bos, "utf-8"); 1593 serializer.startDocument(null, true); 1594 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1595 1596 serializer.startTag(null, TAG_RESTRICTIONS); 1597 1598 for (String key : restrictions.keySet()) { 1599 Object value = restrictions.get(key); 1600 serializer.startTag(null, TAG_ENTRY); 1601 serializer.attribute(null, ATTR_KEY, key); 1602 1603 if (value instanceof Boolean) { 1604 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1605 serializer.text(value.toString()); 1606 } else if (value instanceof Integer) { 1607 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1608 serializer.text(value.toString()); 1609 } else if (value == null || value instanceof String) { 1610 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1611 serializer.text(value != null ? (String) value : ""); 1612 } else { 1613 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1614 String[] values = (String[]) value; 1615 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1616 for (String choice : values) { 1617 serializer.startTag(null, TAG_VALUE); 1618 serializer.text(choice != null ? choice : ""); 1619 serializer.endTag(null, TAG_VALUE); 1620 } 1621 } 1622 serializer.endTag(null, TAG_ENTRY); 1623 } 1624 1625 serializer.endTag(null, TAG_RESTRICTIONS); 1626 1627 serializer.endDocument(); 1628 restrictionsFile.finishWrite(fos); 1629 } catch (Exception e) { 1630 restrictionsFile.failWrite(fos); 1631 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1632 } 1633 } 1634 1635 @Override 1636 public int getUserSerialNumber(int userHandle) { 1637 synchronized (mPackagesLock) { 1638 if (!exists(userHandle)) return -1; 1639 return getUserInfoLocked(userHandle).serialNumber; 1640 } 1641 } 1642 1643 @Override 1644 public int getUserHandle(int userSerialNumber) { 1645 synchronized (mPackagesLock) { 1646 for (int userId : mUserIds) { 1647 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1648 } 1649 // Not found 1650 return -1; 1651 } 1652 } 1653 1654 /** 1655 * Caches the list of user ids in an array, adjusting the array size when necessary. 1656 */ 1657 private void updateUserIdsLocked() { 1658 int num = 0; 1659 for (int i = 0; i < mUsers.size(); i++) { 1660 if (!mUsers.valueAt(i).partial) { 1661 num++; 1662 } 1663 } 1664 final int[] newUsers = new int[num]; 1665 int n = 0; 1666 for (int i = 0; i < mUsers.size(); i++) { 1667 if (!mUsers.valueAt(i).partial) { 1668 newUsers[n++] = mUsers.keyAt(i); 1669 } 1670 } 1671 mUserIds = newUsers; 1672 } 1673 1674 /** 1675 * Make a note of the last started time of a user and do some cleanup. 1676 * @param userId the user that was just foregrounded 1677 */ 1678 public void userForeground(int userId) { 1679 synchronized (mPackagesLock) { 1680 UserInfo user = mUsers.get(userId); 1681 long now = System.currentTimeMillis(); 1682 if (user == null || user.partial) { 1683 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1684 return; 1685 } 1686 if (now > EPOCH_PLUS_30_YEARS) { 1687 user.lastLoggedInTime = now; 1688 writeUserLocked(user); 1689 } 1690 } 1691 } 1692 1693 /** 1694 * Returns the next available user id, filling in any holes in the ids. 1695 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1696 * for data and battery stats collection, or unexpected cross-talk. 1697 * @return 1698 */ 1699 private int getNextAvailableIdLocked() { 1700 synchronized (mPackagesLock) { 1701 int i = MIN_USER_ID; 1702 while (i < Integer.MAX_VALUE) { 1703 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1704 break; 1705 } 1706 i++; 1707 } 1708 return i; 1709 } 1710 } 1711 1712 private String packageToRestrictionsFileName(String packageName) { 1713 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1714 } 1715 1716 private String restrictionsFileNameToPackage(String fileName) { 1717 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1718 (int) (fileName.length() - XML_SUFFIX.length())); 1719 } 1720 1721 @Override 1722 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1723 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1724 != PackageManager.PERMISSION_GRANTED) { 1725 pw.println("Permission Denial: can't dump UserManager from from pid=" 1726 + Binder.getCallingPid() 1727 + ", uid=" + Binder.getCallingUid() 1728 + " without permission " 1729 + android.Manifest.permission.DUMP); 1730 return; 1731 } 1732 1733 long now = System.currentTimeMillis(); 1734 StringBuilder sb = new StringBuilder(); 1735 synchronized (mPackagesLock) { 1736 pw.println("Users:"); 1737 for (int i = 0; i < mUsers.size(); i++) { 1738 UserInfo user = mUsers.valueAt(i); 1739 if (user == null) continue; 1740 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1741 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1742 if (user.partial) pw.print(" <partial>"); 1743 pw.println(); 1744 pw.print(" Created: "); 1745 if (user.creationTime == 0) { 1746 pw.println("<unknown>"); 1747 } else { 1748 sb.setLength(0); 1749 TimeUtils.formatDuration(now - user.creationTime, sb); 1750 sb.append(" ago"); 1751 pw.println(sb); 1752 } 1753 pw.print(" Last logged in: "); 1754 if (user.lastLoggedInTime == 0) { 1755 pw.println("<unknown>"); 1756 } else { 1757 sb.setLength(0); 1758 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1759 sb.append(" ago"); 1760 pw.println(sb); 1761 } 1762 } 1763 } 1764 } 1765} 1766