UserManagerService.java revision 62062996dd256df8b575b2ba1f0bf97109c4e0ba
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"; 110 111 private static final String USER_INFO_DIR = "system" + File.separator + "users"; 112 private static final String USER_LIST_FILENAME = "userlist.xml"; 113 private static final String USER_PHOTO_FILENAME = "photo.png"; 114 115 private static final String RESTRICTIONS_FILE_PREFIX = "res_"; 116 private static final String XML_SUFFIX = ".xml"; 117 118 private static final int MIN_USER_ID = 10; 119 120 private static final int USER_VERSION = 4; 121 122 private static final long EPOCH_PLUS_30_YEARS = 30L * 365 * 24 * 60 * 60 * 1000L; // ms 123 124 // Number of attempts before jumping to the next BACKOFF_TIMES slot 125 private static final int BACKOFF_INC_INTERVAL = 5; 126 127 // Amount of time to force the user to wait before entering the PIN again, after failing 128 // BACKOFF_INC_INTERVAL times. 129 private static final int[] BACKOFF_TIMES = { 0, 30*1000, 60*1000, 5*60*1000, 30*60*1000 }; 130 131 private final Context mContext; 132 private final PackageManagerService mPm; 133 private final Object mInstallLock; 134 private final Object mPackagesLock; 135 136 private final Handler mHandler; 137 138 private final File mUsersDir; 139 private final File mUserListFile; 140 private final File mBaseUserPath; 141 142 private final SparseArray<UserInfo> mUsers = new SparseArray<UserInfo>(); 143 private final SparseArray<Bundle> mUserRestrictions = new SparseArray<Bundle>(); 144 145 class RestrictionsPinState { 146 long salt; 147 String pinHash; 148 int failedAttempts; 149 long lastAttemptTime; 150 } 151 152 private final SparseArray<RestrictionsPinState> mRestrictionsPinStates = 153 new SparseArray<RestrictionsPinState>(); 154 155 /** 156 * Set of user IDs being actively removed. Removed IDs linger in this set 157 * for several seconds to work around a VFS caching issue. 158 */ 159 // @GuardedBy("mPackagesLock") 160 private final SparseBooleanArray mRemovingUserIds = new SparseBooleanArray(); 161 162 private int[] mUserIds; 163 private boolean mGuestEnabled; 164 private int mNextSerialNumber; 165 private int mUserVersion = 0; 166 167 private IAppOpsService mAppOpsService; 168 169 private static UserManagerService sInstance; 170 171 public static UserManagerService getInstance() { 172 synchronized (UserManagerService.class) { 173 return sInstance; 174 } 175 } 176 177 /** 178 * Available for testing purposes. 179 */ 180 UserManagerService(File dataDir, File baseUserPath) { 181 this(null, null, new Object(), new Object(), dataDir, baseUserPath); 182 } 183 184 /** 185 * Called by package manager to create the service. This is closely 186 * associated with the package manager, and the given lock is the 187 * package manager's own lock. 188 */ 189 UserManagerService(Context context, PackageManagerService pm, 190 Object installLock, Object packagesLock) { 191 this(context, pm, installLock, packagesLock, 192 Environment.getDataDirectory(), 193 new File(Environment.getDataDirectory(), "user")); 194 } 195 196 /** 197 * Available for testing purposes. 198 */ 199 private UserManagerService(Context context, PackageManagerService pm, 200 Object installLock, Object packagesLock, 201 File dataDir, File baseUserPath) { 202 mContext = context; 203 mPm = pm; 204 mInstallLock = installLock; 205 mPackagesLock = packagesLock; 206 mHandler = new Handler(); 207 synchronized (mInstallLock) { 208 synchronized (mPackagesLock) { 209 mUsersDir = new File(dataDir, USER_INFO_DIR); 210 mUsersDir.mkdirs(); 211 // Make zeroth user directory, for services to migrate their files to that location 212 File userZeroDir = new File(mUsersDir, "0"); 213 userZeroDir.mkdirs(); 214 mBaseUserPath = baseUserPath; 215 FileUtils.setPermissions(mUsersDir.toString(), 216 FileUtils.S_IRWXU|FileUtils.S_IRWXG 217 |FileUtils.S_IROTH|FileUtils.S_IXOTH, 218 -1, -1); 219 mUserListFile = new File(mUsersDir, USER_LIST_FILENAME); 220 readUserListLocked(); 221 // Prune out any partially created/partially removed users. 222 ArrayList<UserInfo> partials = new ArrayList<UserInfo>(); 223 for (int i = 0; i < mUsers.size(); i++) { 224 UserInfo ui = mUsers.valueAt(i); 225 if (ui.partial && i != 0) { 226 partials.add(ui); 227 } 228 } 229 for (int i = 0; i < partials.size(); i++) { 230 UserInfo ui = partials.get(i); 231 Slog.w(LOG_TAG, "Removing partially created user #" + i 232 + " (name=" + ui.name + ")"); 233 removeUserStateLocked(ui.id); 234 } 235 sInstance = this; 236 } 237 } 238 } 239 240 void systemReady() { 241 mUserPackageMonitor.register(mContext, null, UserHandle.ALL, false); 242 userForeground(UserHandle.USER_OWNER); 243 mAppOpsService = IAppOpsService.Stub.asInterface( 244 ServiceManager.getService(Context.APP_OPS_SERVICE)); 245 for (int i = 0; i < mUserIds.length; ++i) { 246 try { 247 mAppOpsService.setUserRestrictions(mUserRestrictions.get(mUserIds[i]), mUserIds[i]); 248 } catch (RemoteException e) { 249 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 250 } 251 } 252 } 253 254 @Override 255 public List<UserInfo> getUsers(boolean excludeDying) { 256 checkManageUsersPermission("query users"); 257 synchronized (mPackagesLock) { 258 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 259 for (int i = 0; i < mUsers.size(); i++) { 260 UserInfo ui = mUsers.valueAt(i); 261 if (ui.partial) { 262 continue; 263 } 264 if (!excludeDying || !mRemovingUserIds.get(ui.id)) { 265 users.add(ui); 266 } 267 } 268 return users; 269 } 270 } 271 272 @Override 273 public List<UserInfo> getProfiles(int userId, boolean enabledOnly) { 274 if (userId != UserHandle.getCallingUserId()) { 275 checkManageUsersPermission("getting profiles related to user " + userId); 276 } 277 final long ident = Binder.clearCallingIdentity(); 278 try { 279 synchronized (mPackagesLock) { 280 return getProfilesLocked(userId, enabledOnly); 281 } 282 } finally { 283 Binder.restoreCallingIdentity(ident); 284 } 285 } 286 287 /** Assume permissions already checked and caller's identity cleared */ 288 private List<UserInfo> getProfilesLocked(int userId, boolean enabledOnly) { 289 UserInfo user = getUserInfoLocked(userId); 290 ArrayList<UserInfo> users = new ArrayList<UserInfo>(mUsers.size()); 291 for (int i = 0; i < mUsers.size(); i++) { 292 UserInfo profile = mUsers.valueAt(i); 293 if (!isProfileOf(user, profile)) { 294 continue; 295 } 296 if (enabledOnly && !profile.isEnabled()) { 297 continue; 298 } 299 users.add(profile); 300 } 301 return users; 302 } 303 304 @Override 305 public UserInfo getProfileParent(int userHandle) { 306 checkManageUsersPermission("get the profile parent"); 307 synchronized (mPackagesLock) { 308 UserInfo profile = getUserInfoLocked(userHandle); 309 int parentUserId = profile.profileGroupId; 310 if (parentUserId == UserInfo.NO_PROFILE_GROUP_ID) { 311 return null; 312 } else { 313 return getUserInfoLocked(parentUserId); 314 } 315 } 316 } 317 318 private boolean isProfileOf(UserInfo user, UserInfo profile) { 319 return user.id == profile.id || 320 (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 321 && user.profileGroupId == profile.profileGroupId); 322 } 323 324 @Override 325 public void setUserEnabled(int userId) { 326 checkManageUsersPermission("enable user"); 327 synchronized (mPackagesLock) { 328 UserInfo info = getUserInfoLocked(userId); 329 if (info != null && !info.isEnabled()) { 330 info.flags ^= UserInfo.FLAG_DISABLED; 331 writeUserLocked(info); 332 } 333 } 334 } 335 336 @Override 337 public UserInfo getUserInfo(int userId) { 338 checkManageUsersPermission("query user"); 339 synchronized (mPackagesLock) { 340 return getUserInfoLocked(userId); 341 } 342 } 343 344 @Override 345 public boolean isRestricted() { 346 synchronized (mPackagesLock) { 347 return getUserInfoLocked(UserHandle.getCallingUserId()).isRestricted(); 348 } 349 } 350 351 /* 352 * Should be locked on mUsers before calling this. 353 */ 354 private UserInfo getUserInfoLocked(int userId) { 355 UserInfo ui = mUsers.get(userId); 356 // If it is partial and not in the process of being removed, return as unknown user. 357 if (ui != null && ui.partial && !mRemovingUserIds.get(userId)) { 358 Slog.w(LOG_TAG, "getUserInfo: unknown user #" + userId); 359 return null; 360 } 361 return ui; 362 } 363 364 public boolean exists(int userId) { 365 synchronized (mPackagesLock) { 366 return ArrayUtils.contains(mUserIds, userId); 367 } 368 } 369 370 @Override 371 public void setUserName(int userId, String name) { 372 checkManageUsersPermission("rename users"); 373 boolean changed = false; 374 synchronized (mPackagesLock) { 375 UserInfo info = mUsers.get(userId); 376 if (info == null || info.partial) { 377 Slog.w(LOG_TAG, "setUserName: unknown user #" + userId); 378 return; 379 } 380 if (name != null && !name.equals(info.name)) { 381 info.name = name; 382 writeUserLocked(info); 383 changed = true; 384 } 385 } 386 if (changed) { 387 sendUserInfoChangedBroadcast(userId); 388 } 389 } 390 391 @Override 392 public void setUserIcon(int userId, Bitmap bitmap) { 393 checkManageUsersPermission("update users"); 394 synchronized (mPackagesLock) { 395 UserInfo info = mUsers.get(userId); 396 if (info == null || info.partial) { 397 Slog.w(LOG_TAG, "setUserIcon: unknown user #" + userId); 398 return; 399 } 400 writeBitmapLocked(info, bitmap); 401 writeUserLocked(info); 402 } 403 sendUserInfoChangedBroadcast(userId); 404 } 405 406 private void sendUserInfoChangedBroadcast(int userId) { 407 Intent changedIntent = new Intent(Intent.ACTION_USER_INFO_CHANGED); 408 changedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userId); 409 changedIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 410 mContext.sendBroadcastAsUser(changedIntent, UserHandle.ALL); 411 } 412 413 @Override 414 public Bitmap getUserIcon(int userId) { 415 checkManageUsersPermission("read users"); 416 synchronized (mPackagesLock) { 417 UserInfo info = mUsers.get(userId); 418 if (info == null || info.partial) { 419 Slog.w(LOG_TAG, "getUserIcon: unknown user #" + userId); 420 return null; 421 } 422 if (info.iconPath == null) { 423 return null; 424 } 425 return BitmapFactory.decodeFile(info.iconPath); 426 } 427 } 428 429 @Override 430 public void setGuestEnabled(boolean enable) { 431 checkManageUsersPermission("enable guest users"); 432 synchronized (mPackagesLock) { 433 if (mGuestEnabled != enable) { 434 mGuestEnabled = enable; 435 // Erase any guest user that currently exists 436 for (int i = 0; i < mUsers.size(); i++) { 437 UserInfo user = mUsers.valueAt(i); 438 if (!user.partial && user.isGuest()) { 439 if (!enable) { 440 removeUser(user.id); 441 } 442 return; 443 } 444 } 445 // No guest was found 446 if (enable) { 447 createUser("Guest", UserInfo.FLAG_GUEST); 448 } 449 } 450 } 451 } 452 453 @Override 454 public boolean isGuestEnabled() { 455 synchronized (mPackagesLock) { 456 return mGuestEnabled; 457 } 458 } 459 460 @Override 461 public void wipeUser(int userHandle) { 462 checkManageUsersPermission("wipe user"); 463 // TODO: 464 } 465 466 public void makeInitialized(int userId) { 467 checkManageUsersPermission("makeInitialized"); 468 synchronized (mPackagesLock) { 469 UserInfo info = mUsers.get(userId); 470 if (info == null || info.partial) { 471 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 472 } 473 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 474 info.flags |= UserInfo.FLAG_INITIALIZED; 475 writeUserLocked(info); 476 } 477 } 478 } 479 480 @Override 481 public Bundle getUserRestrictions(int userId) { 482 // checkManageUsersPermission("getUserRestrictions"); 483 484 synchronized (mPackagesLock) { 485 Bundle restrictions = mUserRestrictions.get(userId); 486 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 487 } 488 } 489 490 @Override 491 public void setUserRestrictions(Bundle restrictions, int userId) { 492 checkManageUsersPermission("setUserRestrictions"); 493 if (restrictions == null) return; 494 495 synchronized (mPackagesLock) { 496 mUserRestrictions.get(userId).clear(); 497 mUserRestrictions.get(userId).putAll(restrictions); 498 long token = Binder.clearCallingIdentity(); 499 try { 500 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 501 } catch (RemoteException e) { 502 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 503 } finally { 504 Binder.restoreCallingIdentity(token); 505 } 506 writeUserLocked(mUsers.get(userId)); 507 } 508 } 509 510 /** 511 * Check if we've hit the limit of how many users can be created. 512 */ 513 private boolean isUserLimitReachedLocked() { 514 int nUsers = mUsers.size(); 515 return nUsers >= UserManager.getMaxSupportedUsers(); 516 } 517 518 /** 519 * Enforces that only the system UID or root's UID or apps that have the 520 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 521 * permission can make certain calls to the UserManager. 522 * 523 * @param message used as message if SecurityException is thrown 524 * @throws SecurityException if the caller is not system or root 525 */ 526 private static final void checkManageUsersPermission(String message) { 527 final int uid = Binder.getCallingUid(); 528 if (uid != Process.SYSTEM_UID && uid != 0 529 && ActivityManager.checkComponentPermission( 530 android.Manifest.permission.MANAGE_USERS, 531 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 532 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 533 } 534 } 535 536 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 537 try { 538 File dir = new File(mUsersDir, Integer.toString(info.id)); 539 File file = new File(dir, USER_PHOTO_FILENAME); 540 if (!dir.exists()) { 541 dir.mkdir(); 542 FileUtils.setPermissions( 543 dir.getPath(), 544 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 545 -1, -1); 546 } 547 FileOutputStream os; 548 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 549 info.iconPath = file.getAbsolutePath(); 550 } 551 try { 552 os.close(); 553 } catch (IOException ioe) { 554 // What the ... ! 555 } 556 } catch (FileNotFoundException e) { 557 Slog.w(LOG_TAG, "Error setting photo for user ", e); 558 } 559 } 560 561 /** 562 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 563 * cache it elsewhere. 564 * @return the array of user ids. 565 */ 566 public int[] getUserIds() { 567 synchronized (mPackagesLock) { 568 return mUserIds; 569 } 570 } 571 572 int[] getUserIdsLPr() { 573 return mUserIds; 574 } 575 576 private void readUserListLocked() { 577 mGuestEnabled = false; 578 if (!mUserListFile.exists()) { 579 fallbackToSingleUserLocked(); 580 return; 581 } 582 FileInputStream fis = null; 583 AtomicFile userListFile = new AtomicFile(mUserListFile); 584 try { 585 fis = userListFile.openRead(); 586 XmlPullParser parser = Xml.newPullParser(); 587 parser.setInput(fis, null); 588 int type; 589 while ((type = parser.next()) != XmlPullParser.START_TAG 590 && type != XmlPullParser.END_DOCUMENT) { 591 ; 592 } 593 594 if (type != XmlPullParser.START_TAG) { 595 Slog.e(LOG_TAG, "Unable to read user list"); 596 fallbackToSingleUserLocked(); 597 return; 598 } 599 600 mNextSerialNumber = -1; 601 if (parser.getName().equals(TAG_USERS)) { 602 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 603 if (lastSerialNumber != null) { 604 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 605 } 606 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 607 if (versionNumber != null) { 608 mUserVersion = Integer.parseInt(versionNumber); 609 } 610 } 611 612 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 613 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 614 String id = parser.getAttributeValue(null, ATTR_ID); 615 UserInfo user = readUserLocked(Integer.parseInt(id)); 616 617 if (user != null) { 618 mUsers.put(user.id, user); 619 if (user.isGuest()) { 620 mGuestEnabled = true; 621 } 622 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 623 mNextSerialNumber = user.id + 1; 624 } 625 } 626 } 627 } 628 updateUserIdsLocked(); 629 upgradeIfNecessaryLocked(); 630 } catch (IOException ioe) { 631 fallbackToSingleUserLocked(); 632 } catch (XmlPullParserException pe) { 633 fallbackToSingleUserLocked(); 634 } finally { 635 if (fis != null) { 636 try { 637 fis.close(); 638 } catch (IOException e) { 639 } 640 } 641 } 642 } 643 644 /** 645 * Upgrade steps between versions, either for fixing bugs or changing the data format. 646 */ 647 private void upgradeIfNecessaryLocked() { 648 int userVersion = mUserVersion; 649 if (userVersion < 1) { 650 // Assign a proper name for the owner, if not initialized correctly before 651 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 652 if ("Primary".equals(user.name)) { 653 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 654 writeUserLocked(user); 655 } 656 userVersion = 1; 657 } 658 659 if (userVersion < 2) { 660 // Owner should be marked as initialized 661 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 662 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 663 user.flags |= UserInfo.FLAG_INITIALIZED; 664 writeUserLocked(user); 665 } 666 userVersion = 2; 667 } 668 669 670 if (userVersion < 4) { 671 userVersion = 4; 672 } 673 674 if (userVersion < USER_VERSION) { 675 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 676 + USER_VERSION); 677 } else { 678 mUserVersion = userVersion; 679 writeUserListLocked(); 680 } 681 } 682 683 private void fallbackToSingleUserLocked() { 684 // Create the primary user 685 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 686 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 687 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 688 mUsers.put(0, primary); 689 mNextSerialNumber = MIN_USER_ID; 690 mUserVersion = USER_VERSION; 691 692 Bundle restrictions = new Bundle(); 693 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 694 695 updateUserIdsLocked(); 696 697 writeUserListLocked(); 698 writeUserLocked(primary); 699 } 700 701 /* 702 * Writes the user file in this format: 703 * 704 * <user flags="20039023" id="0"> 705 * <name>Primary</name> 706 * </user> 707 */ 708 private void writeUserLocked(UserInfo userInfo) { 709 FileOutputStream fos = null; 710 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 711 try { 712 fos = userFile.startWrite(); 713 final BufferedOutputStream bos = new BufferedOutputStream(fos); 714 715 // XmlSerializer serializer = XmlUtils.serializerInstance(); 716 final XmlSerializer serializer = new FastXmlSerializer(); 717 serializer.setOutput(bos, "utf-8"); 718 serializer.startDocument(null, true); 719 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 720 721 serializer.startTag(null, TAG_USER); 722 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 723 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 724 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 725 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 726 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 727 Long.toString(userInfo.lastLoggedInTime)); 728 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 729 if (pinState != null) { 730 if (pinState.salt != 0) { 731 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 732 } 733 if (pinState.pinHash != null) { 734 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 735 } 736 if (pinState.failedAttempts != 0) { 737 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 738 Integer.toString(pinState.failedAttempts)); 739 serializer.attribute(null, ATTR_LAST_RETRY_MS, 740 Long.toString(pinState.lastAttemptTime)); 741 } 742 } 743 if (userInfo.iconPath != null) { 744 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 745 } 746 if (userInfo.partial) { 747 serializer.attribute(null, ATTR_PARTIAL, "true"); 748 } 749 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 750 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 751 Integer.toString(userInfo.profileGroupId)); 752 } 753 754 serializer.startTag(null, TAG_NAME); 755 serializer.text(userInfo.name); 756 serializer.endTag(null, TAG_NAME); 757 758 Bundle restrictions = mUserRestrictions.get(userInfo.id); 759 if (restrictions != null) { 760 serializer.startTag(null, TAG_RESTRICTIONS); 761 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 762 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 763 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 764 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 765 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 766 writeBoolean(serializer, restrictions, 767 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 768 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 769 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 770 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 771 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 772 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 773 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 774 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 775 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 776 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 777 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 778 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 779 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 780 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_APPS); 781 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 782 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 783 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 784 serializer.endTag(null, TAG_RESTRICTIONS); 785 } 786 serializer.endTag(null, TAG_USER); 787 788 serializer.endDocument(); 789 userFile.finishWrite(fos); 790 } catch (Exception ioe) { 791 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 792 userFile.failWrite(fos); 793 } 794 } 795 796 /* 797 * Writes the user list file in this format: 798 * 799 * <users nextSerialNumber="3"> 800 * <user id="0"></user> 801 * <user id="2"></user> 802 * </users> 803 */ 804 private void writeUserListLocked() { 805 FileOutputStream fos = null; 806 AtomicFile userListFile = new AtomicFile(mUserListFile); 807 try { 808 fos = userListFile.startWrite(); 809 final BufferedOutputStream bos = new BufferedOutputStream(fos); 810 811 // XmlSerializer serializer = XmlUtils.serializerInstance(); 812 final XmlSerializer serializer = new FastXmlSerializer(); 813 serializer.setOutput(bos, "utf-8"); 814 serializer.startDocument(null, true); 815 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 816 817 serializer.startTag(null, TAG_USERS); 818 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 819 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 820 821 for (int i = 0; i < mUsers.size(); i++) { 822 UserInfo user = mUsers.valueAt(i); 823 serializer.startTag(null, TAG_USER); 824 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 825 serializer.endTag(null, TAG_USER); 826 } 827 828 serializer.endTag(null, TAG_USERS); 829 830 serializer.endDocument(); 831 userListFile.finishWrite(fos); 832 } catch (Exception e) { 833 userListFile.failWrite(fos); 834 Slog.e(LOG_TAG, "Error writing user list"); 835 } 836 } 837 838 private UserInfo readUserLocked(int id) { 839 int flags = 0; 840 int serialNumber = id; 841 String name = null; 842 String iconPath = null; 843 long creationTime = 0L; 844 long lastLoggedInTime = 0L; 845 long salt = 0L; 846 String pinHash = null; 847 int failedAttempts = 0; 848 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 849 long lastAttemptTime = 0L; 850 boolean partial = false; 851 Bundle restrictions = new Bundle(); 852 853 FileInputStream fis = null; 854 try { 855 AtomicFile userFile = 856 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 857 fis = userFile.openRead(); 858 XmlPullParser parser = Xml.newPullParser(); 859 parser.setInput(fis, null); 860 int type; 861 while ((type = parser.next()) != XmlPullParser.START_TAG 862 && type != XmlPullParser.END_DOCUMENT) { 863 ; 864 } 865 866 if (type != XmlPullParser.START_TAG) { 867 Slog.e(LOG_TAG, "Unable to read user " + id); 868 return null; 869 } 870 871 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 872 int storedId = readIntAttribute(parser, ATTR_ID, -1); 873 if (storedId != id) { 874 Slog.e(LOG_TAG, "User id does not match the file name"); 875 return null; 876 } 877 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 878 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 879 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 880 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 881 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 882 salt = readLongAttribute(parser, ATTR_SALT, 0L); 883 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 884 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 885 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 886 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 887 UserInfo.NO_PROFILE_GROUP_ID); 888 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 889 // This attribute was added and renamed during development of L. 890 // TODO Remove upgrade path by 1st May 2014 891 profileGroupId = readIntAttribute(parser, "relatedGroupId", 892 UserInfo.NO_PROFILE_GROUP_ID); 893 } 894 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 895 if ("true".equals(valueString)) { 896 partial = true; 897 } 898 899 int outerDepth = parser.getDepth(); 900 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 901 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 902 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 903 continue; 904 } 905 String tag = parser.getName(); 906 if (TAG_NAME.equals(tag)) { 907 type = parser.next(); 908 if (type == XmlPullParser.TEXT) { 909 name = parser.getText(); 910 } 911 } else if (TAG_RESTRICTIONS.equals(tag)) { 912 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 913 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 914 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 915 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 916 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 917 readBoolean(parser, restrictions, 918 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 919 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 920 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 921 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 922 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 923 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 924 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 925 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 926 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 927 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 928 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 929 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 930 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 931 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_APPS); 932 readBoolean(parser, restrictions, 933 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 934 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 935 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 936 } 937 } 938 } 939 940 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 941 userInfo.serialNumber = serialNumber; 942 userInfo.creationTime = creationTime; 943 userInfo.lastLoggedInTime = lastLoggedInTime; 944 userInfo.partial = partial; 945 userInfo.profileGroupId = profileGroupId; 946 mUserRestrictions.append(id, restrictions); 947 if (salt != 0L) { 948 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 949 if (pinState == null) { 950 pinState = new RestrictionsPinState(); 951 mRestrictionsPinStates.put(id, pinState); 952 } 953 pinState.salt = salt; 954 pinState.pinHash = pinHash; 955 pinState.failedAttempts = failedAttempts; 956 pinState.lastAttemptTime = lastAttemptTime; 957 } 958 return userInfo; 959 960 } catch (IOException ioe) { 961 } catch (XmlPullParserException pe) { 962 } finally { 963 if (fis != null) { 964 try { 965 fis.close(); 966 } catch (IOException e) { 967 } 968 } 969 } 970 return null; 971 } 972 973 private void readBoolean(XmlPullParser parser, Bundle restrictions, 974 String restrictionKey) { 975 String value = parser.getAttributeValue(null, restrictionKey); 976 if (value != null) { 977 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 978 } 979 } 980 981 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 982 throws IOException { 983 if (restrictions.containsKey(restrictionKey)) { 984 xml.attribute(null, restrictionKey, 985 Boolean.toString(restrictions.getBoolean(restrictionKey))); 986 } 987 } 988 989 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 990 String valueString = parser.getAttributeValue(null, attr); 991 if (valueString == null) return defaultValue; 992 try { 993 return Integer.parseInt(valueString); 994 } catch (NumberFormatException nfe) { 995 return defaultValue; 996 } 997 } 998 999 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 1000 String valueString = parser.getAttributeValue(null, attr); 1001 if (valueString == null) return defaultValue; 1002 try { 1003 return Long.parseLong(valueString); 1004 } catch (NumberFormatException nfe) { 1005 return defaultValue; 1006 } 1007 } 1008 1009 private boolean isPackageInstalled(String pkg, int userId) { 1010 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 1011 PackageManager.GET_UNINSTALLED_PACKAGES, 1012 userId); 1013 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 1014 return false; 1015 } 1016 return true; 1017 } 1018 1019 /** 1020 * Removes all the restrictions files (res_<packagename>) for a given user, if all is true, 1021 * else removes only those packages that have been uninstalled. 1022 * Does not do any permissions checking. 1023 */ 1024 private void cleanAppRestrictions(int userId, boolean all) { 1025 synchronized (mPackagesLock) { 1026 File dir = Environment.getUserSystemDirectory(userId); 1027 String[] files = dir.list(); 1028 if (files == null) return; 1029 for (String fileName : files) { 1030 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1031 File resFile = new File(dir, fileName); 1032 if (resFile.exists()) { 1033 if (all) { 1034 resFile.delete(); 1035 } else { 1036 String pkg = restrictionsFileNameToPackage(fileName); 1037 if (!isPackageInstalled(pkg, userId)) { 1038 resFile.delete(); 1039 } 1040 } 1041 } 1042 } 1043 } 1044 } 1045 } 1046 1047 /** 1048 * Removes the app restrictions file for a specific package and user id, if it exists. 1049 */ 1050 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1051 synchronized (mPackagesLock) { 1052 File dir = Environment.getUserSystemDirectory(userId); 1053 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1054 if (resFile.exists()) { 1055 resFile.delete(); 1056 } 1057 } 1058 } 1059 1060 @Override 1061 public UserInfo createProfileForUser(String name, int flags, int userId) { 1062 checkManageUsersPermission("Only the system can create users"); 1063 if (userId != UserHandle.USER_OWNER) { 1064 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1065 return null; 1066 } 1067 return createUserInternal(name, flags, userId); 1068 } 1069 1070 @Override 1071 public UserInfo createUser(String name, int flags) { 1072 checkManageUsersPermission("Only the system can create users"); 1073 return createUserInternal(name, flags, UserHandle.USER_NULL); 1074 } 1075 1076 private UserInfo createUserInternal(String name, int flags, int parentId) { 1077 final long ident = Binder.clearCallingIdentity(); 1078 UserInfo userInfo = null; 1079 try { 1080 synchronized (mInstallLock) { 1081 synchronized (mPackagesLock) { 1082 UserInfo parent = null; 1083 if (parentId != UserHandle.USER_NULL) { 1084 parent = getUserInfoLocked(parentId); 1085 if (parent == null) return null; 1086 } 1087 if (isUserLimitReachedLocked()) return null; 1088 int userId = getNextAvailableIdLocked(); 1089 userInfo = new UserInfo(userId, name, null, flags); 1090 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1091 userInfo.serialNumber = mNextSerialNumber++; 1092 long now = System.currentTimeMillis(); 1093 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1094 userInfo.partial = true; 1095 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1096 mUsers.put(userId, userInfo); 1097 writeUserListLocked(); 1098 if (parent != null) { 1099 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1100 parent.profileGroupId = parent.id; 1101 writeUserLocked(parent); 1102 } 1103 userInfo.profileGroupId = parent.profileGroupId; 1104 } 1105 writeUserLocked(userInfo); 1106 mPm.createNewUserLILPw(userId, userPath); 1107 userInfo.partial = false; 1108 writeUserLocked(userInfo); 1109 updateUserIdsLocked(); 1110 Bundle restrictions = new Bundle(); 1111 mUserRestrictions.append(userId, restrictions); 1112 } 1113 } 1114 if (userInfo != null) { 1115 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1116 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1117 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1118 android.Manifest.permission.MANAGE_USERS); 1119 } 1120 } finally { 1121 Binder.restoreCallingIdentity(ident); 1122 } 1123 return userInfo; 1124 } 1125 1126 /** 1127 * Removes a user and all data directories created for that user. This method should be called 1128 * after the user's processes have been terminated. 1129 * @param userHandle the user's id 1130 */ 1131 public boolean removeUser(int userHandle) { 1132 checkManageUsersPermission("Only the system can remove users"); 1133 final UserInfo user; 1134 synchronized (mPackagesLock) { 1135 user = mUsers.get(userHandle); 1136 if (userHandle == 0 || user == null) { 1137 return false; 1138 } 1139 mRemovingUserIds.put(userHandle, true); 1140 try { 1141 mAppOpsService.removeUser(userHandle); 1142 } catch (RemoteException e) { 1143 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1144 } 1145 // Set this to a partially created user, so that the user will be purged 1146 // on next startup, in case the runtime stops now before stopping and 1147 // removing the user completely. 1148 user.partial = true; 1149 // Mark it as disabled, so that it isn't returned any more when 1150 // profiles are queried. 1151 user.flags |= UserInfo.FLAG_DISABLED; 1152 writeUserLocked(user); 1153 } 1154 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1155 int res; 1156 try { 1157 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1158 new IStopUserCallback.Stub() { 1159 @Override 1160 public void userStopped(int userId) { 1161 finishRemoveUser(userId); 1162 } 1163 @Override 1164 public void userStopAborted(int userId) { 1165 } 1166 }); 1167 } catch (RemoteException e) { 1168 return false; 1169 } 1170 1171 return res == ActivityManager.USER_OP_SUCCESS; 1172 } 1173 1174 void finishRemoveUser(final int userHandle) { 1175 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1176 // Let other services shutdown any activity and clean up their state before completely 1177 // wiping the user's system directory and removing from the user list 1178 long ident = Binder.clearCallingIdentity(); 1179 try { 1180 final boolean isManaged = getUserInfo(userHandle).isManagedProfile(); 1181 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1182 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1183 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1184 android.Manifest.permission.MANAGE_USERS, 1185 1186 new BroadcastReceiver() { 1187 @Override 1188 public void onReceive(Context context, Intent intent) { 1189 if (DBG) { 1190 Slog.i(LOG_TAG, 1191 "USER_REMOVED broadcast sent, cleaning up user data " 1192 + userHandle); 1193 } 1194 new Thread() { 1195 public void run() { 1196 synchronized (mInstallLock) { 1197 synchronized (mPackagesLock) { 1198 removeUserStateLocked(userHandle); 1199 } 1200 } 1201 // Send broadcast to notify system that the user removed was a 1202 // managed user. 1203 if (isManaged) { 1204 sendProfileRemovedBroadcast(userHandle); 1205 } 1206 } 1207 }.start(); 1208 } 1209 }, 1210 1211 null, Activity.RESULT_OK, null, null); 1212 } finally { 1213 Binder.restoreCallingIdentity(ident); 1214 } 1215 } 1216 1217 private void removeUserStateLocked(final int userHandle) { 1218 // Cleanup package manager settings 1219 mPm.cleanUpUserLILPw(userHandle); 1220 1221 // Remove this user from the list 1222 mUsers.remove(userHandle); 1223 1224 // Have user ID linger for several seconds to let external storage VFS 1225 // cache entries expire. This must be greater than the 'entry_valid' 1226 // timeout used by the FUSE daemon. 1227 mHandler.postDelayed(new Runnable() { 1228 @Override 1229 public void run() { 1230 synchronized (mPackagesLock) { 1231 mRemovingUserIds.delete(userHandle); 1232 } 1233 } 1234 }, MINUTE_IN_MILLIS); 1235 1236 mRestrictionsPinStates.remove(userHandle); 1237 // Remove user file 1238 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1239 userFile.delete(); 1240 // Update the user list 1241 writeUserListLocked(); 1242 updateUserIdsLocked(); 1243 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1244 } 1245 1246 private void removeDirectoryRecursive(File parent) { 1247 if (parent.isDirectory()) { 1248 String[] files = parent.list(); 1249 for (String filename : files) { 1250 File child = new File(parent, filename); 1251 removeDirectoryRecursive(child); 1252 } 1253 } 1254 parent.delete(); 1255 } 1256 1257 private void sendProfileRemovedBroadcast(int userHandle) { 1258 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1259 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(userHandle)); 1260 // Note: This makes an assumption that the parent owner is user 0. 1261 mContext.sendBroadcastAsUser(managedProfileIntent, UserHandle.OWNER, null); 1262 } 1263 1264 @Override 1265 public Bundle getApplicationRestrictions(String packageName) { 1266 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1267 } 1268 1269 @Override 1270 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1271 if (UserHandle.getCallingUserId() != userId 1272 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1273 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1274 } 1275 synchronized (mPackagesLock) { 1276 // Read the restrictions from XML 1277 return readApplicationRestrictionsLocked(packageName, userId); 1278 } 1279 } 1280 1281 @Override 1282 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1283 int userId) { 1284 if (UserHandle.getCallingUserId() != userId 1285 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1286 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1287 } 1288 synchronized (mPackagesLock) { 1289 // Write the restrictions to XML 1290 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1291 } 1292 1293 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1294 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1295 changeIntent.setPackage(packageName); 1296 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1297 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1298 } 1299 1300 @Override 1301 public boolean setRestrictionsChallenge(String newPin) { 1302 checkManageUsersPermission("Only system can modify the restrictions pin"); 1303 int userId = UserHandle.getCallingUserId(); 1304 synchronized (mPackagesLock) { 1305 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1306 if (pinState == null) { 1307 pinState = new RestrictionsPinState(); 1308 } 1309 if (newPin == null) { 1310 pinState.salt = 0; 1311 pinState.pinHash = null; 1312 } else { 1313 try { 1314 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1315 } catch (NoSuchAlgorithmException e) { 1316 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1317 } 1318 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1319 pinState.failedAttempts = 0; 1320 } 1321 mRestrictionsPinStates.put(userId, pinState); 1322 writeUserLocked(mUsers.get(userId)); 1323 } 1324 return true; 1325 } 1326 1327 @Override 1328 public int checkRestrictionsChallenge(String pin) { 1329 checkManageUsersPermission("Only system can verify the restrictions pin"); 1330 int userId = UserHandle.getCallingUserId(); 1331 synchronized (mPackagesLock) { 1332 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1333 // If there's no pin set, return error code 1334 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1335 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1336 } else if (pin == null) { 1337 // If just checking if user can be prompted, return remaining time 1338 int waitTime = getRemainingTimeForPinAttempt(pinState); 1339 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1340 return waitTime; 1341 } else { 1342 int waitTime = getRemainingTimeForPinAttempt(pinState); 1343 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1344 if (waitTime > 0) { 1345 return waitTime; 1346 } 1347 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1348 pinState.failedAttempts = 0; 1349 writeUserLocked(mUsers.get(userId)); 1350 return UserManager.PIN_VERIFICATION_SUCCESS; 1351 } else { 1352 pinState.failedAttempts++; 1353 pinState.lastAttemptTime = System.currentTimeMillis(); 1354 writeUserLocked(mUsers.get(userId)); 1355 return waitTime; 1356 } 1357 } 1358 } 1359 } 1360 1361 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1362 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1363 BACKOFF_TIMES.length - 1); 1364 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1365 BACKOFF_TIMES[backoffIndex] : 0; 1366 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1367 0); 1368 } 1369 1370 @Override 1371 public boolean hasRestrictionsChallenge() { 1372 int userId = UserHandle.getCallingUserId(); 1373 synchronized (mPackagesLock) { 1374 return hasRestrictionsPinLocked(userId); 1375 } 1376 } 1377 1378 private boolean hasRestrictionsPinLocked(int userId) { 1379 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1380 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1381 return false; 1382 } 1383 return true; 1384 } 1385 1386 @Override 1387 public void removeRestrictions() { 1388 checkManageUsersPermission("Only system can remove restrictions"); 1389 final int userHandle = UserHandle.getCallingUserId(); 1390 removeRestrictionsForUser(userHandle, true); 1391 } 1392 1393 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1394 synchronized (mPackagesLock) { 1395 // Remove all user restrictions 1396 setUserRestrictions(new Bundle(), userHandle); 1397 // Remove restrictions pin 1398 setRestrictionsChallenge(null); 1399 // Remove any app restrictions 1400 cleanAppRestrictions(userHandle, true); 1401 } 1402 if (unblockApps) { 1403 unblockAllAppsForUser(userHandle); 1404 } 1405 } 1406 1407 private void unblockAllAppsForUser(final int userHandle) { 1408 mHandler.post(new Runnable() { 1409 @Override 1410 public void run() { 1411 List<ApplicationInfo> apps = 1412 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1413 userHandle).getList(); 1414 final long ident = Binder.clearCallingIdentity(); 1415 try { 1416 for (ApplicationInfo appInfo : apps) { 1417 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1418 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1419 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1420 userHandle); 1421 } 1422 } 1423 } finally { 1424 Binder.restoreCallingIdentity(ident); 1425 } 1426 } 1427 }); 1428 } 1429 1430 /* 1431 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1432 * Not the most secure, but it is at least a second level of protection. First level is that 1433 * the file is in a location only readable by the system process. 1434 * @param password the password. 1435 * @param salt the randomly generated salt 1436 * @return the hash of the pattern in a String. 1437 */ 1438 private String passwordToHash(String password, long salt) { 1439 if (password == null) { 1440 return null; 1441 } 1442 String algo = null; 1443 String hashed = salt + password; 1444 try { 1445 byte[] saltedPassword = (password + salt).getBytes(); 1446 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1447 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1448 hashed = toHex(sha1) + toHex(md5); 1449 } catch (NoSuchAlgorithmException e) { 1450 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1451 } 1452 return hashed; 1453 } 1454 1455 private static String toHex(byte[] ary) { 1456 final String hex = "0123456789ABCDEF"; 1457 String ret = ""; 1458 for (int i = 0; i < ary.length; i++) { 1459 ret += hex.charAt((ary[i] >> 4) & 0xf); 1460 ret += hex.charAt(ary[i] & 0xf); 1461 } 1462 return ret; 1463 } 1464 1465 private int getUidForPackage(String packageName) { 1466 long ident = Binder.clearCallingIdentity(); 1467 try { 1468 return mContext.getPackageManager().getApplicationInfo(packageName, 1469 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1470 } catch (NameNotFoundException nnfe) { 1471 return -1; 1472 } finally { 1473 Binder.restoreCallingIdentity(ident); 1474 } 1475 } 1476 1477 private Bundle readApplicationRestrictionsLocked(String packageName, 1478 int userId) { 1479 final Bundle restrictions = new Bundle(); 1480 final ArrayList<String> values = new ArrayList<String>(); 1481 1482 FileInputStream fis = null; 1483 try { 1484 AtomicFile restrictionsFile = 1485 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1486 packageToRestrictionsFileName(packageName))); 1487 fis = restrictionsFile.openRead(); 1488 XmlPullParser parser = Xml.newPullParser(); 1489 parser.setInput(fis, null); 1490 int type; 1491 while ((type = parser.next()) != XmlPullParser.START_TAG 1492 && type != XmlPullParser.END_DOCUMENT) { 1493 ; 1494 } 1495 1496 if (type != XmlPullParser.START_TAG) { 1497 Slog.e(LOG_TAG, "Unable to read restrictions file " 1498 + restrictionsFile.getBaseFile()); 1499 return restrictions; 1500 } 1501 1502 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1503 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1504 String key = parser.getAttributeValue(null, ATTR_KEY); 1505 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1506 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1507 if (multiple != null) { 1508 int count = Integer.parseInt(multiple); 1509 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1510 if (type == XmlPullParser.START_TAG 1511 && parser.getName().equals(TAG_VALUE)) { 1512 values.add(parser.nextText().trim()); 1513 count--; 1514 } 1515 } 1516 String [] valueStrings = new String[values.size()]; 1517 values.toArray(valueStrings); 1518 restrictions.putStringArray(key, valueStrings); 1519 } else if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1520 restrictions.putBoolean(key, Boolean.parseBoolean( 1521 parser.nextText().trim())); 1522 } else { 1523 String value = parser.nextText().trim(); 1524 restrictions.putString(key, value); 1525 } 1526 } 1527 } 1528 1529 } catch (IOException ioe) { 1530 } catch (XmlPullParserException pe) { 1531 } finally { 1532 if (fis != null) { 1533 try { 1534 fis.close(); 1535 } catch (IOException e) { 1536 } 1537 } 1538 } 1539 return restrictions; 1540 } 1541 1542 private void writeApplicationRestrictionsLocked(String packageName, 1543 Bundle restrictions, int userId) { 1544 FileOutputStream fos = null; 1545 AtomicFile restrictionsFile = new AtomicFile( 1546 new File(Environment.getUserSystemDirectory(userId), 1547 packageToRestrictionsFileName(packageName))); 1548 try { 1549 fos = restrictionsFile.startWrite(); 1550 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1551 1552 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1553 final XmlSerializer serializer = new FastXmlSerializer(); 1554 serializer.setOutput(bos, "utf-8"); 1555 serializer.startDocument(null, true); 1556 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1557 1558 serializer.startTag(null, TAG_RESTRICTIONS); 1559 1560 for (String key : restrictions.keySet()) { 1561 Object value = restrictions.get(key); 1562 serializer.startTag(null, TAG_ENTRY); 1563 serializer.attribute(null, ATTR_KEY, key); 1564 1565 if (value instanceof Boolean) { 1566 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1567 serializer.text(value.toString()); 1568 } else if (value == null || value instanceof String) { 1569 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1570 serializer.text(value != null ? (String) value : ""); 1571 } else { 1572 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1573 String[] values = (String[]) value; 1574 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1575 for (String choice : values) { 1576 serializer.startTag(null, TAG_VALUE); 1577 serializer.text(choice != null ? choice : ""); 1578 serializer.endTag(null, TAG_VALUE); 1579 } 1580 } 1581 serializer.endTag(null, TAG_ENTRY); 1582 } 1583 1584 serializer.endTag(null, TAG_RESTRICTIONS); 1585 1586 serializer.endDocument(); 1587 restrictionsFile.finishWrite(fos); 1588 } catch (Exception e) { 1589 restrictionsFile.failWrite(fos); 1590 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1591 } 1592 } 1593 1594 @Override 1595 public int getUserSerialNumber(int userHandle) { 1596 synchronized (mPackagesLock) { 1597 if (!exists(userHandle)) return -1; 1598 return getUserInfoLocked(userHandle).serialNumber; 1599 } 1600 } 1601 1602 @Override 1603 public int getUserHandle(int userSerialNumber) { 1604 synchronized (mPackagesLock) { 1605 for (int userId : mUserIds) { 1606 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1607 } 1608 // Not found 1609 return -1; 1610 } 1611 } 1612 1613 /** 1614 * Caches the list of user ids in an array, adjusting the array size when necessary. 1615 */ 1616 private void updateUserIdsLocked() { 1617 int num = 0; 1618 for (int i = 0; i < mUsers.size(); i++) { 1619 if (!mUsers.valueAt(i).partial) { 1620 num++; 1621 } 1622 } 1623 final int[] newUsers = new int[num]; 1624 int n = 0; 1625 for (int i = 0; i < mUsers.size(); i++) { 1626 if (!mUsers.valueAt(i).partial) { 1627 newUsers[n++] = mUsers.keyAt(i); 1628 } 1629 } 1630 mUserIds = newUsers; 1631 } 1632 1633 /** 1634 * Make a note of the last started time of a user and do some cleanup. 1635 * @param userId the user that was just foregrounded 1636 */ 1637 public void userForeground(int userId) { 1638 synchronized (mPackagesLock) { 1639 UserInfo user = mUsers.get(userId); 1640 long now = System.currentTimeMillis(); 1641 if (user == null || user.partial) { 1642 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1643 return; 1644 } 1645 if (now > EPOCH_PLUS_30_YEARS) { 1646 user.lastLoggedInTime = now; 1647 writeUserLocked(user); 1648 } 1649 // If this is not a restricted profile and there is no restrictions pin, clean up 1650 // all restrictions files that might have been left behind, else clean up just the 1651 // ones with uninstalled packages 1652 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1653 final long salt = pinState == null ? 0 : pinState.salt; 1654 cleanAppRestrictions(userId, (!user.isRestricted() && salt == 0)); 1655 } 1656 } 1657 1658 /** 1659 * Returns the next available user id, filling in any holes in the ids. 1660 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1661 * for data and battery stats collection, or unexpected cross-talk. 1662 * @return 1663 */ 1664 private int getNextAvailableIdLocked() { 1665 synchronized (mPackagesLock) { 1666 int i = MIN_USER_ID; 1667 while (i < Integer.MAX_VALUE) { 1668 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1669 break; 1670 } 1671 i++; 1672 } 1673 return i; 1674 } 1675 } 1676 1677 private String packageToRestrictionsFileName(String packageName) { 1678 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1679 } 1680 1681 private String restrictionsFileNameToPackage(String fileName) { 1682 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1683 (int) (fileName.length() - XML_SUFFIX.length())); 1684 } 1685 1686 @Override 1687 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1688 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1689 != PackageManager.PERMISSION_GRANTED) { 1690 pw.println("Permission Denial: can't dump UserManager from from pid=" 1691 + Binder.getCallingPid() 1692 + ", uid=" + Binder.getCallingUid() 1693 + " without permission " 1694 + android.Manifest.permission.DUMP); 1695 return; 1696 } 1697 1698 long now = System.currentTimeMillis(); 1699 StringBuilder sb = new StringBuilder(); 1700 synchronized (mPackagesLock) { 1701 pw.println("Users:"); 1702 for (int i = 0; i < mUsers.size(); i++) { 1703 UserInfo user = mUsers.valueAt(i); 1704 if (user == null) continue; 1705 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1706 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1707 if (user.partial) pw.print(" <partial>"); 1708 pw.println(); 1709 pw.print(" Created: "); 1710 if (user.creationTime == 0) { 1711 pw.println("<unknown>"); 1712 } else { 1713 sb.setLength(0); 1714 TimeUtils.formatDuration(now - user.creationTime, sb); 1715 sb.append(" ago"); 1716 pw.println(sb); 1717 } 1718 pw.print(" Last logged in: "); 1719 if (user.lastLoggedInTime == 0) { 1720 pw.println("<unknown>"); 1721 } else { 1722 sb.setLength(0); 1723 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1724 sb.append(" ago"); 1725 pw.println(sb); 1726 } 1727 } 1728 } 1729 } 1730 1731 private PackageMonitor mUserPackageMonitor = new PackageMonitor() { 1732 @Override 1733 public void onPackageRemoved(String pkg, int uid) { 1734 final int userId = this.getChangingUserId(); 1735 // Package could be disappearing because it is being blocked, so also check if 1736 // it has been uninstalled. 1737 final boolean uninstalled = isPackageDisappearing(pkg) == PACKAGE_PERMANENT_CHANGE; 1738 if (uninstalled && userId >= 0 && !isPackageInstalled(pkg, userId)) { 1739 cleanAppRestrictionsForPackage(pkg, userId); 1740 } 1741 } 1742 }; 1743} 1744