UserManagerService.java revision 5b5aa4072fb58aea47f523c724878c579adae294
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_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 private final Context mContext; 133 private final PackageManagerService mPm; 134 private final Object mInstallLock; 135 private final Object mPackagesLock; 136 137 private final Handler mHandler; 138 139 private final File mUsersDir; 140 private final File mUserListFile; 141 private final File mBaseUserPath; 142 143 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 144 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 145 146 class RestrictionsPinState { 147 long salt; 148 String pinHash; 149 int failedAttempts; 150 long lastAttemptTime; 151 } 152 153 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 154 new SparseArray<RestrictionsPinState>(); 155 156 /** 157 * Set of user IDs being actively removed. Removed IDs linger in this set 158 * for several seconds to work around a VFS caching issue. 159 */ 160 // @GuardedBy("mPackagesLock") 161 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 162 163 private int[] mUserIds; 164 private boolean mGuestEnabled; 165 private int mNextSerialNumber; 166 private int mUserVersion = 0; 167 168 private IAppOpsService mAppOpsService; 169 170 private static UserManagerService sInstance; 171 172 public static UserManagerService getInstance() { 173 synchronized (UserManagerService.class) { 174 return sInstance; 175 } 176 } 177 178 /** 179 * Available for testing purposes. 180 */ 181 UserManagerService(File dataDir, File baseUserPath) { 182 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 183 } 184 185 /** 186 * Called by package manager to create the service. This is closely 187 * associated with the package manager, and the given lock is the 188 * package manager's own lock. 189 */ 190 UserManagerService(Context context, PackageManagerService pm, 191 Object installLock, Object packagesLock) { 192 this(context, pm, installLock, packagesLock, 193 Environment.getDataDirectory(), 194 new File(Environment.getDataDirectory(), "user")); 195 } 196 197 /** 198 * Available for testing purposes. 199 */ 200 private UserManagerService(Context context, PackageManagerService pm, 201 Object installLock, Object packagesLock, 202 File dataDir, File baseUserPath) { 203 mContext = context; 204 mPm = pm; 205 mInstallLock = installLock; 206 mPackagesLock = packagesLock; 207 mHandler = new Handler(); 208 synchronized (mInstallLock) { 209 synchronized (mPackagesLock) { 210 mUsersDir = new File(dataDir, USER_INFO_DIR); 211 mUsersDir.mkdirs(); 212 // Make zeroth user directory, for services to migrate their files to that location 213 File userZeroDir = new File(mUsersDir, "0"); 214 userZeroDir.mkdirs(); 215 mBaseUserPath = baseUserPath; 216 FileUtils.setPermissions(mUsersDir.toString(), 217 FileUtils.S_IRWXU|FileUtils.S_IRWXG 218 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 219 -1, -1); 220 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 221 readUserListLocked(); 222 // Prune out any partially created/partially removed users. 223 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 224 for (int i = 0; i < mUsers.size(); i++) { 225 UserInfo ui = mUsers.valueAt(i); 226 if (ui.partial && i != 0) { 227 partials.add(ui); 228 } 229 } 230 for (int i = 0; i < partials.size(); i++) { 231 UserInfo ui = partials.get(i); 232 Slog.w(LOG_TAG, "Removing partially created user #" + i 233 + " (name=" + ui.name + ")"); 234 removeUserStateLocked(ui.id); 235 } 236 sInstance = this; 237 } 238 } 239 } 240 241 void systemReady() { 242 mUserPackageMonitor.register(mContext, null, UserHandle.ALL, false); 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 users.add(profile); 301 } 302 return users; 303 } 304 305 @Override 306 public UserInfo getProfileParent(int userHandle) { 307 checkManageUsersPermission("get the profile parent"); 308 synchronized (mPackagesLock) { 309 UserInfo profile = getUserInfoLocked(userHandle); 310 int parentUserId = profile.profileGroupId; 311 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 312 return null; 313 } else { 314 return getUserInfoLocked(parentUserId); 315 } 316 } 317 } 318 319 private boolean isProfileOf(UserInfo user, UserInfo profile) { 320 return user.id == profile.id || 321 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 322 && user.profileGroupId == profile.profileGroupId); 323 } 324 325 @Override 326 public void setUserEnabled(int userId) { 327 checkManageUsersPermission("enable user"); 328 synchronized (mPackagesLock) { 329 UserInfo info = getUserInfoLocked(userId); 330 if (info != null && !info.isEnabled()) { 331 info.flags ^= UserInfo.FLAG_DISABLED; 332 writeUserLocked(info); 333 } 334 } 335 } 336 337 @Override 338 public UserInfo getUserInfo(int userId) { 339 checkManageUsersPermission("query user"); 340 synchronized (mPackagesLock) { 341 return getUserInfoLocked(userId); 342 } 343 } 344 345 @Override 346 public boolean isRestricted() { 347 synchronized (mPackagesLock) { 348 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 349 } 350 } 351 352 /* 353 * Should be locked on mUsers before calling this. 354 */ 355 private UserInfo getUserInfoLocked(int userId) { 356 UserInfo ui = mUsers.get(userId); 357 // If it is partial and not in the process of being removed, return as unknown user. 358 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 359 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 360 return null; 361 } 362 return ui; 363 } 364 365 public boolean exists(int userId) { 366 synchronized (mPackagesLock) { 367 return ArrayUtils.contains(mUserIds, userId); 368 } 369 } 370 371 @Override 372 public void setUserName(int userId, String name) { 373 checkManageUsersPermission("rename users"); 374 boolean changed = false; 375 synchronized (mPackagesLock) { 376 UserInfo info = mUsers.get(userId); 377 if (info == null || info.partial) { 378 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 379 return; 380 } 381 if (name != null && !name.equals(info.name)) { 382 info.name = name; 383 writeUserLocked(info); 384 changed = true; 385 } 386 } 387 if (changed) { 388 sendUserInfoChangedBroadcast(userId); 389 } 390 } 391 392 @Override 393 public void setUserIcon(int userId, Bitmap bitmap) { 394 checkManageUsersPermission("update users"); 395 synchronized (mPackagesLock) { 396 UserInfo info = mUsers.get(userId); 397 if (info == null || info.partial) { 398 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 399 return; 400 } 401 writeBitmapLocked(info, bitmap); 402 writeUserLocked(info); 403 } 404 sendUserInfoChangedBroadcast(userId); 405 } 406 407 private void sendUserInfoChangedBroadcast(int userId) { 408 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 409 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 410 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 411 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 412 } 413 414 @Override 415 public Bitmap getUserIcon(int userId) { 416 checkManageUsersPermission("read users"); 417 synchronized (mPackagesLock) { 418 UserInfo info = mUsers.get(userId); 419 if (info == null || info.partial) { 420 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 421 return null; 422 } 423 if (info.iconPath == null) { 424 return null; 425 } 426 return BitmapFactory.decodeFile(info.iconPath); 427 } 428 } 429 430 @Override 431 public void setGuestEnabled(boolean enable) { 432 checkManageUsersPermission("enable guest users"); 433 synchronized (mPackagesLock) { 434 if (mGuestEnabled != enable) { 435 mGuestEnabled = enable; 436 // Erase any guest user that currently exists 437 for (int i = 0; i < mUsers.size(); i++) { 438 UserInfo user = mUsers.valueAt(i); 439 if (!user.partial && user.isGuest()) { 440 if (!enable) { 441 removeUser(user.id); 442 } 443 return; 444 } 445 } 446 // No guest was found 447 if (enable) { 448 createUser("Guest", UserInfo.FLAG_GUEST); 449 } 450 } 451 } 452 } 453 454 @Override 455 public boolean isGuestEnabled() { 456 synchronized (mPackagesLock) { 457 return mGuestEnabled; 458 } 459 } 460 461 @Override 462 public void wipeUser(int userHandle) { 463 checkManageUsersPermission("wipe user"); 464 // TODO: 465 } 466 467 public void makeInitialized(int userId) { 468 checkManageUsersPermission("makeInitialized"); 469 synchronized (mPackagesLock) { 470 UserInfo info = mUsers.get(userId); 471 if (info == null || info.partial) { 472 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 473 } 474 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 475 info.flags |= UserInfo.FLAG_INITIALIZED; 476 writeUserLocked(info); 477 } 478 } 479 } 480 481 @Override 482 public Bundle getUserRestrictions(int userId) { 483 // checkManageUsersPermission("getUserRestrictions"); 484 485 synchronized (mPackagesLock) { 486 Bundle restrictions = mUserRestrictions.get(userId); 487 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 488 } 489 } 490 491 @Override 492 public void setUserRestrictions(Bundle restrictions, int userId) { 493 checkManageUsersPermission("setUserRestrictions"); 494 if (restrictions == null) return; 495 496 synchronized (mPackagesLock) { 497 mUserRestrictions.get(userId).clear(); 498 mUserRestrictions.get(userId).putAll(restrictions); 499 long token = Binder.clearCallingIdentity(); 500 try { 501 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 502 } catch (RemoteException e) { 503 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 504 } finally { 505 Binder.restoreCallingIdentity(token); 506 } 507 writeUserLocked(mUsers.get(userId)); 508 } 509 } 510 511 /** 512 * Check if we've hit the limit of how many users can be created. 513 */ 514 private boolean isUserLimitReachedLocked() { 515 int aliveUserCount = 0; 516 final int totalUserCount = mUsers.size(); 517 // Skip over users being removed 518 for (int i = 0; i < totalUserCount; i++) { 519 UserInfo user = mUsers.valueAt(i); 520 if (!mRemovingUserIds.get(user.id)) { 521 aliveUserCount++; 522 } 523 } 524 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 525 } 526 527 /** 528 * Enforces that only the system UID or root's UID or apps that have the 529 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 530 * permission can make certain calls to the UserManager. 531 * 532 * @param message used as message if SecurityException is thrown 533 * @throws SecurityException if the caller is not system or root 534 */ 535 private static final void checkManageUsersPermission(String message) { 536 final int uid = Binder.getCallingUid(); 537 if (uid != Process.SYSTEM_UID && uid != 0 538 && ActivityManager.checkComponentPermission( 539 android.Manifest.permission.MANAGE_USERS, 540 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 541 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 542 } 543 } 544 545 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 546 try { 547 File dir = new File(mUsersDir, Integer.toString(info.id)); 548 File file = new File(dir, USER_PHOTO_FILENAME); 549 if (!dir.exists()) { 550 dir.mkdir(); 551 FileUtils.setPermissions( 552 dir.getPath(), 553 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 554 -1, -1); 555 } 556 FileOutputStream os; 557 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 558 info.iconPath = file.getAbsolutePath(); 559 } 560 try { 561 os.close(); 562 } catch (IOException ioe) { 563 // What the ... ! 564 } 565 } catch (FileNotFoundException e) { 566 Slog.w(LOG_TAG, "Error setting photo for user ", e); 567 } 568 } 569 570 /** 571 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 572 * cache it elsewhere. 573 * @return the array of user ids. 574 */ 575 public int[] getUserIds() { 576 synchronized (mPackagesLock) { 577 return mUserIds; 578 } 579 } 580 581 int[] getUserIdsLPr() { 582 return mUserIds; 583 } 584 585 private void readUserListLocked() { 586 mGuestEnabled = false; 587 if (!mUserListFile.exists()) { 588 fallbackToSingleUserLocked(); 589 return; 590 } 591 FileInputStream fis = null; 592 AtomicFile userListFile = new AtomicFile(mUserListFile); 593 try { 594 fis = userListFile.openRead(); 595 XmlPullParser parser = Xml.newPullParser(); 596 parser.setInput(fis, null); 597 int type; 598 while ((type = parser.next()) != XmlPullParser.START_TAG 599 && type != XmlPullParser.END_DOCUMENT) { 600 ; 601 } 602 603 if (type != XmlPullParser.START_TAG) { 604 Slog.e(LOG_TAG, "Unable to read user list"); 605 fallbackToSingleUserLocked(); 606 return; 607 } 608 609 mNextSerialNumber = -1; 610 if (parser.getName().equals(TAG_USERS)) { 611 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 612 if (lastSerialNumber != null) { 613 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 614 } 615 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 616 if (versionNumber != null) { 617 mUserVersion = Integer.parseInt(versionNumber); 618 } 619 } 620 621 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 622 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 623 String id = parser.getAttributeValue(null, ATTR_ID); 624 UserInfo user = readUserLocked(Integer.parseInt(id)); 625 626 if (user != null) { 627 mUsers.put(user.id, user); 628 if (user.isGuest()) { 629 mGuestEnabled = true; 630 } 631 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 632 mNextSerialNumber = user.id + 1; 633 } 634 } 635 } 636 } 637 updateUserIdsLocked(); 638 upgradeIfNecessaryLocked(); 639 } catch (IOException ioe) { 640 fallbackToSingleUserLocked(); 641 } catch (XmlPullParserException pe) { 642 fallbackToSingleUserLocked(); 643 } finally { 644 if (fis != null) { 645 try { 646 fis.close(); 647 } catch (IOException e) { 648 } 649 } 650 } 651 } 652 653 /** 654 * Upgrade steps between versions, either for fixing bugs or changing the data format. 655 */ 656 private void upgradeIfNecessaryLocked() { 657 int userVersion = mUserVersion; 658 if (userVersion < 1) { 659 // Assign a proper name for the owner, if not initialized correctly before 660 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 661 if ("Primary".equals(user.name)) { 662 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 663 writeUserLocked(user); 664 } 665 userVersion = 1; 666 } 667 668 if (userVersion < 2) { 669 // Owner should be marked as initialized 670 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 671 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 672 user.flags |= UserInfo.FLAG_INITIALIZED; 673 writeUserLocked(user); 674 } 675 userVersion = 2; 676 } 677 678 679 if (userVersion < 4) { 680 userVersion = 4; 681 } 682 683 if (userVersion < USER_VERSION) { 684 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 685 + USER_VERSION); 686 } else { 687 mUserVersion = userVersion; 688 writeUserListLocked(); 689 } 690 } 691 692 private void fallbackToSingleUserLocked() { 693 // Create the primary user 694 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 695 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 696 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 697 mUsers.put(0, primary); 698 mNextSerialNumber = MIN_USER_ID; 699 mUserVersion = USER_VERSION; 700 701 Bundle restrictions = new Bundle(); 702 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 703 704 updateUserIdsLocked(); 705 706 writeUserListLocked(); 707 writeUserLocked(primary); 708 } 709 710 /* 711 * Writes the user file in this format: 712 * 713 * <user flags="20039023" id="0"> 714 * <name>Primary</name> 715 * </user> 716 */ 717 private void writeUserLocked(UserInfo userInfo) { 718 FileOutputStream fos = null; 719 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 720 try { 721 fos = userFile.startWrite(); 722 final BufferedOutputStream bos = new BufferedOutputStream(fos); 723 724 // XmlSerializer serializer = XmlUtils.serializerInstance(); 725 final XmlSerializer serializer = new FastXmlSerializer(); 726 serializer.setOutput(bos, "utf-8"); 727 serializer.startDocument(null, true); 728 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 729 730 serializer.startTag(null, TAG_USER); 731 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 732 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 733 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 734 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 735 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 736 Long.toString(userInfo.lastLoggedInTime)); 737 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 738 if (pinState != null) { 739 if (pinState.salt != 0) { 740 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 741 } 742 if (pinState.pinHash != null) { 743 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 744 } 745 if (pinState.failedAttempts != 0) { 746 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 747 Integer.toString(pinState.failedAttempts)); 748 serializer.attribute(null, ATTR_LAST_RETRY_MS, 749 Long.toString(pinState.lastAttemptTime)); 750 } 751 } 752 if (userInfo.iconPath != null) { 753 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 754 } 755 if (userInfo.partial) { 756 serializer.attribute(null, ATTR_PARTIAL, "true"); 757 } 758 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 759 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 760 Integer.toString(userInfo.profileGroupId)); 761 } 762 763 serializer.startTag(null, TAG_NAME); 764 serializer.text(userInfo.name); 765 serializer.endTag(null, TAG_NAME); 766 767 Bundle restrictions = mUserRestrictions.get(userInfo.id); 768 if (restrictions != null) { 769 serializer.startTag(null, TAG_RESTRICTIONS); 770 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 771 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 772 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 773 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 774 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 775 writeBoolean(serializer, restrictions, 776 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 777 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 778 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 779 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 780 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 781 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 782 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 783 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 784 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 785 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 786 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 787 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 788 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 789 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_APPS); 790 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 791 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 792 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 793 writeBoolean(serializer, restrictions, UserManager.DISALLOW_TELEPHONY); 794 serializer.endTag(null, TAG_RESTRICTIONS); 795 } 796 serializer.endTag(null, TAG_USER); 797 798 serializer.endDocument(); 799 userFile.finishWrite(fos); 800 } catch (Exception ioe) { 801 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 802 userFile.failWrite(fos); 803 } 804 } 805 806 /* 807 * Writes the user list file in this format: 808 * 809 * <users nextSerialNumber="3"> 810 * <user id="0"></user> 811 * <user id="2"></user> 812 * </users> 813 */ 814 private void writeUserListLocked() { 815 FileOutputStream fos = null; 816 AtomicFile userListFile = new AtomicFile(mUserListFile); 817 try { 818 fos = userListFile.startWrite(); 819 final BufferedOutputStream bos = new BufferedOutputStream(fos); 820 821 // XmlSerializer serializer = XmlUtils.serializerInstance(); 822 final XmlSerializer serializer = new FastXmlSerializer(); 823 serializer.setOutput(bos, "utf-8"); 824 serializer.startDocument(null, true); 825 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 826 827 serializer.startTag(null, TAG_USERS); 828 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 829 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 830 831 for (int i = 0; i < mUsers.size(); i++) { 832 UserInfo user = mUsers.valueAt(i); 833 serializer.startTag(null, TAG_USER); 834 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 835 serializer.endTag(null, TAG_USER); 836 } 837 838 serializer.endTag(null, TAG_USERS); 839 840 serializer.endDocument(); 841 userListFile.finishWrite(fos); 842 } catch (Exception e) { 843 userListFile.failWrite(fos); 844 Slog.e(LOG_TAG, "Error writing user list"); 845 } 846 } 847 848 private UserInfo readUserLocked(int id) { 849 int flags = 0; 850 int serialNumber = id; 851 String name = null; 852 String iconPath = null; 853 long creationTime = 0L; 854 long lastLoggedInTime = 0L; 855 long salt = 0L; 856 String pinHash = null; 857 int failedAttempts = 0; 858 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 859 long lastAttemptTime = 0L; 860 boolean partial = false; 861 Bundle restrictions = new Bundle(); 862 863 FileInputStream fis = null; 864 try { 865 AtomicFile userFile = 866 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 867 fis = userFile.openRead(); 868 XmlPullParser parser = Xml.newPullParser(); 869 parser.setInput(fis, null); 870 int type; 871 while ((type = parser.next()) != XmlPullParser.START_TAG 872 && type != XmlPullParser.END_DOCUMENT) { 873 ; 874 } 875 876 if (type != XmlPullParser.START_TAG) { 877 Slog.e(LOG_TAG, "Unable to read user " + id); 878 return null; 879 } 880 881 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 882 int storedId = readIntAttribute(parser, ATTR_ID, -1); 883 if (storedId != id) { 884 Slog.e(LOG_TAG, "User id does not match the file name"); 885 return null; 886 } 887 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 888 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 889 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 890 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 891 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 892 salt = readLongAttribute(parser, ATTR_SALT, 0L); 893 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 894 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 895 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 896 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 897 UserInfo.NO_PROFILE_GROUP_ID); 898 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 899 // This attribute was added and renamed during development of L. 900 // TODO Remove upgrade path by 1st May 2014 901 profileGroupId = readIntAttribute(parser, "relatedGroupId", 902 UserInfo.NO_PROFILE_GROUP_ID); 903 } 904 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 905 if ("true".equals(valueString)) { 906 partial = true; 907 } 908 909 int outerDepth = parser.getDepth(); 910 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 911 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 912 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 913 continue; 914 } 915 String tag = parser.getName(); 916 if (TAG_NAME.equals(tag)) { 917 type = parser.next(); 918 if (type == XmlPullParser.TEXT) { 919 name = parser.getText(); 920 } 921 } else if (TAG_RESTRICTIONS.equals(tag)) { 922 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 923 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 924 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 925 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 926 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 927 readBoolean(parser, restrictions, 928 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 929 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 930 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 931 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 932 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 933 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 934 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 935 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 936 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 937 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 938 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 939 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 940 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 941 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_APPS); 942 readBoolean(parser, restrictions, 943 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 944 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 945 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 946 readBoolean(parser, restrictions, UserManager.DISALLOW_TELEPHONY); 947 } 948 } 949 } 950 951 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 952 userInfo.serialNumber = serialNumber; 953 userInfo.creationTime = creationTime; 954 userInfo.lastLoggedInTime = lastLoggedInTime; 955 userInfo.partial = partial; 956 userInfo.profileGroupId = profileGroupId; 957 mUserRestrictions.append(id, restrictions); 958 if (salt != 0L) { 959 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 960 if (pinState == null) { 961 pinState = new RestrictionsPinState(); 962 mRestrictionsPinStates.put(id, pinState); 963 } 964 pinState.salt = salt; 965 pinState.pinHash = pinHash; 966 pinState.failedAttempts = failedAttempts; 967 pinState.lastAttemptTime = lastAttemptTime; 968 } 969 return userInfo; 970 971 } catch (IOException ioe) { 972 } catch (XmlPullParserException pe) { 973 } finally { 974 if (fis != null) { 975 try { 976 fis.close(); 977 } catch (IOException e) { 978 } 979 } 980 } 981 return null; 982 } 983 984 private void readBoolean(XmlPullParser parser, Bundle restrictions, 985 String restrictionKey) { 986 String value = parser.getAttributeValue(null, restrictionKey); 987 if (value != null) { 988 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 989 } 990 } 991 992 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 993 throws IOException { 994 if (restrictions.containsKey(restrictionKey)) { 995 xml.attribute(null, restrictionKey, 996 Boolean.toString(restrictions.getBoolean(restrictionKey))); 997 } 998 } 999 1000 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 1001 String valueString = parser.getAttributeValue(null, attr); 1002 if (valueString == null) return defaultValue; 1003 try { 1004 return Integer.parseInt(valueString); 1005 } catch (NumberFormatException nfe) { 1006 return defaultValue; 1007 } 1008 } 1009 1010 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1011 String valueString = parser.getAttributeValue(null, attr); 1012 if (valueString == null) return defaultValue; 1013 try { 1014 return Long.parseLong(valueString); 1015 } catch (NumberFormatException nfe) { 1016 return defaultValue; 1017 } 1018 } 1019 1020 private boolean isPackageInstalled(String pkg, int userId) { 1021 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1022 PackageManager.GET_UNINSTALLED_PACKAGES, 1023 userId); 1024 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1025 return false; 1026 } 1027 return true; 1028 } 1029 1030 /** 1031 * Removes all the restrictions files (res_<packagename>) for a given user, if all is true, 1032 * else removes only those packages that have been uninstalled. 1033 * Does not do any permissions checking. 1034 */ 1035 private void cleanAppRestrictions(int userId, boolean all) { 1036 synchronized (mPackagesLock) { 1037 File dir = Environment.getUserSystemDirectory(userId); 1038 String[] files = dir.list(); 1039 if (files == null) return; 1040 for (String fileName : files) { 1041 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1042 File resFile = new File(dir, fileName); 1043 if (resFile.exists()) { 1044 if (all) { 1045 resFile.delete(); 1046 } else { 1047 String pkg = restrictionsFileNameToPackage(fileName); 1048 if (!isPackageInstalled(pkg, userId)) { 1049 resFile.delete(); 1050 } 1051 } 1052 } 1053 } 1054 } 1055 } 1056 } 1057 1058 /** 1059 * Removes the app restrictions file for a specific package and user id, if it exists. 1060 */ 1061 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1062 synchronized (mPackagesLock) { 1063 File dir = Environment.getUserSystemDirectory(userId); 1064 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1065 if (resFile.exists()) { 1066 resFile.delete(); 1067 } 1068 } 1069 } 1070 1071 @Override 1072 public UserInfo createProfileForUser(String name, int flags, int userId) { 1073 checkManageUsersPermission("Only the system can create users"); 1074 if (userId != UserHandle.USER_OWNER) { 1075 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1076 return null; 1077 } 1078 return createUserInternal(name, flags, userId); 1079 } 1080 1081 @Override 1082 public UserInfo createUser(String name, int flags) { 1083 checkManageUsersPermission("Only the system can create users"); 1084 return createUserInternal(name, flags, UserHandle.USER_NULL); 1085 } 1086 1087 private UserInfo createUserInternal(String name, int flags, int parentId) { 1088 final long ident = Binder.clearCallingIdentity(); 1089 UserInfo userInfo = null; 1090 try { 1091 synchronized (mInstallLock) { 1092 synchronized (mPackagesLock) { 1093 UserInfo parent = null; 1094 if (parentId != UserHandle.USER_NULL) { 1095 parent = getUserInfoLocked(parentId); 1096 if (parent == null) return null; 1097 } 1098 if (isUserLimitReachedLocked()) return null; 1099 int userId = getNextAvailableIdLocked(); 1100 userInfo = new UserInfo(userId, name, null, flags); 1101 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1102 userInfo.serialNumber = mNextSerialNumber++; 1103 long now = System.currentTimeMillis(); 1104 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1105 userInfo.partial = true; 1106 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1107 mUsers.put(userId, userInfo); 1108 writeUserListLocked(); 1109 if (parent != null) { 1110 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1111 parent.profileGroupId = parent.id; 1112 writeUserLocked(parent); 1113 } 1114 userInfo.profileGroupId = parent.profileGroupId; 1115 } 1116 writeUserLocked(userInfo); 1117 mPm.createNewUserLILPw(userId, userPath); 1118 userInfo.partial = false; 1119 writeUserLocked(userInfo); 1120 updateUserIdsLocked(); 1121 Bundle restrictions = new Bundle(); 1122 mUserRestrictions.append(userId, restrictions); 1123 } 1124 } 1125 if (userInfo != null) { 1126 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1127 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1128 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1129 android.Manifest.permission.MANAGE_USERS); 1130 } 1131 } finally { 1132 Binder.restoreCallingIdentity(ident); 1133 } 1134 return userInfo; 1135 } 1136 1137 /** 1138 * Removes a user and all data directories created for that user. This method should be called 1139 * after the user's processes have been terminated. 1140 * @param userHandle the user's id 1141 */ 1142 public boolean removeUser(int userHandle) { 1143 checkManageUsersPermission("Only the system can remove users"); 1144 long ident = Binder.clearCallingIdentity(); 1145 try { 1146 final UserInfo user; 1147 synchronized (mPackagesLock) { 1148 user = mUsers.get(userHandle); 1149 if (userHandle == 0 || user == null) { 1150 return false; 1151 } 1152 mRemovingUserIds.put(userHandle, true); 1153 try { 1154 mAppOpsService.removeUser(userHandle); 1155 } catch (RemoteException e) { 1156 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1157 } 1158 // Set this to a partially created user, so that the user will be purged 1159 // on next startup, in case the runtime stops now before stopping and 1160 // removing the user completely. 1161 user.partial = true; 1162 // Mark it as disabled, so that it isn't returned any more when 1163 // profiles are queried. 1164 user.flags |= UserInfo.FLAG_DISABLED; 1165 writeUserLocked(user); 1166 } 1167 1168 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1169 && user.isManagedProfile()) { 1170 // Send broadcast to notify system that the user removed was a 1171 // managed user. 1172 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1173 } 1174 1175 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1176 int res; 1177 try { 1178 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1179 new IStopUserCallback.Stub() { 1180 @Override 1181 public void userStopped(int userId) { 1182 finishRemoveUser(userId); 1183 } 1184 @Override 1185 public void userStopAborted(int userId) { 1186 } 1187 }); 1188 } catch (RemoteException e) { 1189 return false; 1190 } 1191 return res == ActivityManager.USER_OP_SUCCESS; 1192 } finally { 1193 Binder.restoreCallingIdentity(ident); 1194 } 1195 } 1196 1197 void finishRemoveUser(final int userHandle) { 1198 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1199 // Let other services shutdown any activity and clean up their state before completely 1200 // wiping the user's system directory and removing from the user list 1201 long ident = Binder.clearCallingIdentity(); 1202 try { 1203 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1204 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1205 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1206 android.Manifest.permission.MANAGE_USERS, 1207 1208 new BroadcastReceiver() { 1209 @Override 1210 public void onReceive(Context context, Intent intent) { 1211 if (DBG) { 1212 Slog.i(LOG_TAG, 1213 "USER_REMOVED broadcast sent, cleaning up user data " 1214 + userHandle); 1215 } 1216 new Thread() { 1217 public void run() { 1218 synchronized (mInstallLock) { 1219 synchronized (mPackagesLock) { 1220 removeUserStateLocked(userHandle); 1221 } 1222 } 1223 } 1224 }.start(); 1225 } 1226 }, 1227 1228 null, Activity.RESULT_OK, null, null); 1229 } finally { 1230 Binder.restoreCallingIdentity(ident); 1231 } 1232 } 1233 1234 private void removeUserStateLocked(final int userHandle) { 1235 // Cleanup package manager settings 1236 mPm.cleanUpUserLILPw(userHandle); 1237 1238 // Remove this user from the list 1239 mUsers.remove(userHandle); 1240 1241 // Have user ID linger for several seconds to let external storage VFS 1242 // cache entries expire. This must be greater than the 'entry_valid' 1243 // timeout used by the FUSE daemon. 1244 mHandler.postDelayed(new Runnable() { 1245 @Override 1246 public void run() { 1247 synchronized (mPackagesLock) { 1248 mRemovingUserIds.delete(userHandle); 1249 } 1250 } 1251 }, MINUTE_IN_MILLIS); 1252 1253 mRestrictionsPinStates.remove(userHandle); 1254 // Remove user file 1255 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1256 userFile.delete(); 1257 // Update the user list 1258 writeUserListLocked(); 1259 updateUserIdsLocked(); 1260 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1261 } 1262 1263 private void removeDirectoryRecursive(File parent) { 1264 if (parent.isDirectory()) { 1265 String[] files = parent.list(); 1266 for (String filename : files) { 1267 File child = new File(parent, filename); 1268 removeDirectoryRecursive(child); 1269 } 1270 } 1271 parent.delete(); 1272 } 1273 1274 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1275 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1276 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); 1277 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1278 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1279 } 1280 1281 @Override 1282 public Bundle getApplicationRestrictions(String packageName) { 1283 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1284 } 1285 1286 @Override 1287 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1288 if (UserHandle.getCallingUserId() != userId 1289 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1290 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1291 } 1292 synchronized (mPackagesLock) { 1293 // Read the restrictions from XML 1294 return readApplicationRestrictionsLocked(packageName, userId); 1295 } 1296 } 1297 1298 @Override 1299 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1300 int userId) { 1301 if (UserHandle.getCallingUserId() != userId 1302 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1303 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1304 } 1305 synchronized (mPackagesLock) { 1306 // Write the restrictions to XML 1307 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1308 } 1309 1310 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1311 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1312 changeIntent.setPackage(packageName); 1313 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1314 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1315 } 1316 1317 @Override 1318 public boolean setRestrictionsChallenge(String newPin) { 1319 checkManageUsersPermission("Only system can modify the restrictions pin"); 1320 int userId = UserHandle.getCallingUserId(); 1321 synchronized (mPackagesLock) { 1322 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1323 if (pinState == null) { 1324 pinState = new RestrictionsPinState(); 1325 } 1326 if (newPin == null) { 1327 pinState.salt = 0; 1328 pinState.pinHash = null; 1329 } else { 1330 try { 1331 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1332 } catch (NoSuchAlgorithmException e) { 1333 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1334 } 1335 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1336 pinState.failedAttempts = 0; 1337 } 1338 mRestrictionsPinStates.put(userId, pinState); 1339 writeUserLocked(mUsers.get(userId)); 1340 } 1341 return true; 1342 } 1343 1344 @Override 1345 public int checkRestrictionsChallenge(String pin) { 1346 checkManageUsersPermission("Only system can verify the restrictions pin"); 1347 int userId = UserHandle.getCallingUserId(); 1348 synchronized (mPackagesLock) { 1349 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1350 // If there's no pin set, return error code 1351 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1352 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1353 } else if (pin == null) { 1354 // If just checking if user can be prompted, return remaining time 1355 int waitTime = getRemainingTimeForPinAttempt(pinState); 1356 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1357 return waitTime; 1358 } else { 1359 int waitTime = getRemainingTimeForPinAttempt(pinState); 1360 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1361 if (waitTime > 0) { 1362 return waitTime; 1363 } 1364 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1365 pinState.failedAttempts = 0; 1366 writeUserLocked(mUsers.get(userId)); 1367 return UserManager.PIN_VERIFICATION_SUCCESS; 1368 } else { 1369 pinState.failedAttempts++; 1370 pinState.lastAttemptTime = System.currentTimeMillis(); 1371 writeUserLocked(mUsers.get(userId)); 1372 return waitTime; 1373 } 1374 } 1375 } 1376 } 1377 1378 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1379 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1380 BACKOFF_TIMES.length - 1); 1381 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1382 BACKOFF_TIMES[backoffIndex] : 0; 1383 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1384 0); 1385 } 1386 1387 @Override 1388 public boolean hasRestrictionsChallenge() { 1389 int userId = UserHandle.getCallingUserId(); 1390 synchronized (mPackagesLock) { 1391 return hasRestrictionsPinLocked(userId); 1392 } 1393 } 1394 1395 private boolean hasRestrictionsPinLocked(int userId) { 1396 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1397 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1398 return false; 1399 } 1400 return true; 1401 } 1402 1403 @Override 1404 public void removeRestrictions() { 1405 checkManageUsersPermission("Only system can remove restrictions"); 1406 final int userHandle = UserHandle.getCallingUserId(); 1407 removeRestrictionsForUser(userHandle, true); 1408 } 1409 1410 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1411 synchronized (mPackagesLock) { 1412 // Remove all user restrictions 1413 setUserRestrictions(new Bundle(), userHandle); 1414 // Remove restrictions pin 1415 setRestrictionsChallenge(null); 1416 // Remove any app restrictions 1417 cleanAppRestrictions(userHandle, true); 1418 } 1419 if (unblockApps) { 1420 unblockAllAppsForUser(userHandle); 1421 } 1422 } 1423 1424 private void unblockAllAppsForUser(final int userHandle) { 1425 mHandler.post(new Runnable() { 1426 @Override 1427 public void run() { 1428 List<ApplicationInfo> apps = 1429 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1430 userHandle).getList(); 1431 final long ident = Binder.clearCallingIdentity(); 1432 try { 1433 for (ApplicationInfo appInfo : apps) { 1434 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1435 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1436 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1437 userHandle); 1438 } 1439 } 1440 } finally { 1441 Binder.restoreCallingIdentity(ident); 1442 } 1443 } 1444 }); 1445 } 1446 1447 /* 1448 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1449 * Not the most secure, but it is at least a second level of protection. First level is that 1450 * the file is in a location only readable by the system process. 1451 * @param password the password. 1452 * @param salt the randomly generated salt 1453 * @return the hash of the pattern in a String. 1454 */ 1455 private String passwordToHash(String password, long salt) { 1456 if (password == null) { 1457 return null; 1458 } 1459 String algo = null; 1460 String hashed = salt + password; 1461 try { 1462 byte[] saltedPassword = (password + salt).getBytes(); 1463 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1464 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1465 hashed = toHex(sha1) + toHex(md5); 1466 } catch (NoSuchAlgorithmException e) { 1467 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1468 } 1469 return hashed; 1470 } 1471 1472 private static String toHex(byte[] ary) { 1473 final String hex = "0123456789ABCDEF"; 1474 String ret = ""; 1475 for (int i = 0; i < ary.length; i++) { 1476 ret += hex.charAt((ary[i] >> 4) & 0xf); 1477 ret += hex.charAt(ary[i] & 0xf); 1478 } 1479 return ret; 1480 } 1481 1482 private int getUidForPackage(String packageName) { 1483 long ident = Binder.clearCallingIdentity(); 1484 try { 1485 return mContext.getPackageManager().getApplicationInfo(packageName, 1486 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1487 } catch (NameNotFoundException nnfe) { 1488 return -1; 1489 } finally { 1490 Binder.restoreCallingIdentity(ident); 1491 } 1492 } 1493 1494 private Bundle readApplicationRestrictionsLocked(String packageName, 1495 int userId) { 1496 final Bundle restrictions = new Bundle(); 1497 final ArrayList<String> values = new ArrayList<String>(); 1498 1499 FileInputStream fis = null; 1500 try { 1501 AtomicFile restrictionsFile = 1502 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1503 packageToRestrictionsFileName(packageName))); 1504 fis = restrictionsFile.openRead(); 1505 XmlPullParser parser = Xml.newPullParser(); 1506 parser.setInput(fis, null); 1507 int type; 1508 while ((type = parser.next()) != XmlPullParser.START_TAG 1509 && type != XmlPullParser.END_DOCUMENT) { 1510 ; 1511 } 1512 1513 if (type != XmlPullParser.START_TAG) { 1514 Slog.e(LOG_TAG, "Unable to read restrictions file " 1515 + restrictionsFile.getBaseFile()); 1516 return restrictions; 1517 } 1518 1519 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1520 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1521 String key = parser.getAttributeValue(null, ATTR_KEY); 1522 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1523 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1524 if (multiple != null) { 1525 int count = Integer.parseInt(multiple); 1526 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1527 if (type == XmlPullParser.START_TAG 1528 && parser.getName().equals(TAG_VALUE)) { 1529 values.add(parser.nextText().trim()); 1530 count--; 1531 } 1532 } 1533 String [] valueStrings = new String[values.size()]; 1534 values.toArray(valueStrings); 1535 restrictions.putStringArray(key, valueStrings); 1536 } else { 1537 String value = parser.nextText().trim(); 1538 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1539 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1540 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1541 restrictions.putInt(key, Integer.parseInt(value)); 1542 } else { 1543 restrictions.putString(key, value); 1544 } 1545 } 1546 } 1547 } 1548 } catch (IOException ioe) { 1549 } catch (XmlPullParserException pe) { 1550 } finally { 1551 if (fis != null) { 1552 try { 1553 fis.close(); 1554 } catch (IOException e) { 1555 } 1556 } 1557 } 1558 return restrictions; 1559 } 1560 1561 private void writeApplicationRestrictionsLocked(String packageName, 1562 Bundle restrictions, int userId) { 1563 FileOutputStream fos = null; 1564 AtomicFile restrictionsFile = new AtomicFile( 1565 new File(Environment.getUserSystemDirectory(userId), 1566 packageToRestrictionsFileName(packageName))); 1567 try { 1568 fos = restrictionsFile.startWrite(); 1569 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1570 1571 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1572 final XmlSerializer serializer = new FastXmlSerializer(); 1573 serializer.setOutput(bos, "utf-8"); 1574 serializer.startDocument(null, true); 1575 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1576 1577 serializer.startTag(null, TAG_RESTRICTIONS); 1578 1579 for (String key : restrictions.keySet()) { 1580 Object value = restrictions.get(key); 1581 serializer.startTag(null, TAG_ENTRY); 1582 serializer.attribute(null, ATTR_KEY, key); 1583 1584 if (value instanceof Boolean) { 1585 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1586 serializer.text(value.toString()); 1587 } else if (value instanceof Integer) { 1588 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1589 serializer.text(value.toString()); 1590 } else if (value == null || value instanceof String) { 1591 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1592 serializer.text(value != null ? (String) value : ""); 1593 } else { 1594 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1595 String[] values = (String[]) value; 1596 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1597 for (String choice : values) { 1598 serializer.startTag(null, TAG_VALUE); 1599 serializer.text(choice != null ? choice : ""); 1600 serializer.endTag(null, TAG_VALUE); 1601 } 1602 } 1603 serializer.endTag(null, TAG_ENTRY); 1604 } 1605 1606 serializer.endTag(null, TAG_RESTRICTIONS); 1607 1608 serializer.endDocument(); 1609 restrictionsFile.finishWrite(fos); 1610 } catch (Exception e) { 1611 restrictionsFile.failWrite(fos); 1612 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1613 } 1614 } 1615 1616 @Override 1617 public int getUserSerialNumber(int userHandle) { 1618 synchronized (mPackagesLock) { 1619 if (!exists(userHandle)) return -1; 1620 return getUserInfoLocked(userHandle).serialNumber; 1621 } 1622 } 1623 1624 @Override 1625 public int getUserHandle(int userSerialNumber) { 1626 synchronized (mPackagesLock) { 1627 for (int userId : mUserIds) { 1628 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1629 } 1630 // Not found 1631 return -1; 1632 } 1633 } 1634 1635 /** 1636 * Caches the list of user ids in an array, adjusting the array size when necessary. 1637 */ 1638 private void updateUserIdsLocked() { 1639 int num = 0; 1640 for (int i = 0; i < mUsers.size(); i++) { 1641 if (!mUsers.valueAt(i).partial) { 1642 num++; 1643 } 1644 } 1645 final int[] newUsers = new int[num]; 1646 int n = 0; 1647 for (int i = 0; i < mUsers.size(); i++) { 1648 if (!mUsers.valueAt(i).partial) { 1649 newUsers[n++] = mUsers.keyAt(i); 1650 } 1651 } 1652 mUserIds = newUsers; 1653 } 1654 1655 /** 1656 * Make a note of the last started time of a user and do some cleanup. 1657 * @param userId the user that was just foregrounded 1658 */ 1659 public void userForeground(int userId) { 1660 synchronized (mPackagesLock) { 1661 UserInfo user = mUsers.get(userId); 1662 long now = System.currentTimeMillis(); 1663 if (user == null || user.partial) { 1664 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1665 return; 1666 } 1667 if (now > EPOCH_PLUS_30_YEARS) { 1668 user.lastLoggedInTime = now; 1669 writeUserLocked(user); 1670 } 1671 // If this is not a restricted profile and there is no restrictions pin, clean up 1672 // all restrictions files that might have been left behind, else clean up just the 1673 // ones with uninstalled packages 1674 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1675 final long salt = pinState == null ? 0 : pinState.salt; 1676 cleanAppRestrictions(userId, (!user.isRestricted() && salt == 0)); 1677 } 1678 } 1679 1680 /** 1681 * Returns the next available user id, filling in any holes in the ids. 1682 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1683 * for data and battery stats collection, or unexpected cross-talk. 1684 * @return 1685 */ 1686 private int getNextAvailableIdLocked() { 1687 synchronized (mPackagesLock) { 1688 int i = MIN_USER_ID; 1689 while (i < Integer.MAX_VALUE) { 1690 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1691 break; 1692 } 1693 i++; 1694 } 1695 return i; 1696 } 1697 } 1698 1699 private String packageToRestrictionsFileName(String packageName) { 1700 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1701 } 1702 1703 private String restrictionsFileNameToPackage(String fileName) { 1704 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1705 (int) (fileName.length() - XML_SUFFIX.length())); 1706 } 1707 1708 @Override 1709 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1710 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1711 != PackageManager.PERMISSION_GRANTED) { 1712 pw.println("Permission Denial: can't dump UserManager from from pid=" 1713 + Binder.getCallingPid() 1714 + ", uid=" + Binder.getCallingUid() 1715 + " without permission " 1716 + android.Manifest.permission.DUMP); 1717 return; 1718 } 1719 1720 long now = System.currentTimeMillis(); 1721 StringBuilder sb = new StringBuilder(); 1722 synchronized (mPackagesLock) { 1723 pw.println("Users:"); 1724 for (int i = 0; i < mUsers.size(); i++) { 1725 UserInfo user = mUsers.valueAt(i); 1726 if (user == null) continue; 1727 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1728 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1729 if (user.partial) pw.print(" <partial>"); 1730 pw.println(); 1731 pw.print(" Created: "); 1732 if (user.creationTime == 0) { 1733 pw.println("<unknown>"); 1734 } else { 1735 sb.setLength(0); 1736 TimeUtils.formatDuration(now - user.creationTime, sb); 1737 sb.append(" ago"); 1738 pw.println(sb); 1739 } 1740 pw.print(" Last logged in: "); 1741 if (user.lastLoggedInTime == 0) { 1742 pw.println("<unknown>"); 1743 } else { 1744 sb.setLength(0); 1745 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1746 sb.append(" ago"); 1747 pw.println(sb); 1748 } 1749 } 1750 } 1751 } 1752 1753 private PackageMonitor mUserPackageMonitor = new PackageMonitor() { 1754 @Override 1755 public void onPackageRemoved(String pkg, int uid) { 1756 final int userId = this.getChangingUserId(); 1757 // Package could be disappearing because it is being blocked, so also check if 1758 // it has been uninstalled. 1759 final boolean uninstalled = isPackageDisappearing(pkg) == PACKAGE_PERMANENT_CHANGE; 1760 if (uninstalled && userId >= 0 && !isPackageInstalled(pkg, userId)) { 1761 cleanAppRestrictionsForPackage(pkg, userId); 1762 } 1763 } 1764 }; 1765} 1766