UserManagerService.java revision 1e9c21871e81642669079cd290ef47818a3165bd
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 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 public void makeInitialized(int userId) { 430 checkManageUsersPermission("makeInitialized"); 431 synchronized (mPackagesLock) { 432 UserInfo info = mUsers.get(userId); 433 if (info == null || info.partial) { 434 Slog.w(LOG_TAG, "makeInitialized: unknown user #" + userId); 435 } 436 if ((info.flags&UserInfo.FLAG_INITIALIZED) == 0) { 437 info.flags |= UserInfo.FLAG_INITIALIZED; 438 writeUserLocked(info); 439 } 440 } 441 } 442 443 @Override 444 public Bundle getUserRestrictions(int userId) { 445 // checkManageUsersPermission("getUserRestrictions"); 446 447 synchronized (mPackagesLock) { 448 Bundle restrictions = mUserRestrictions.get(userId); 449 return restrictions != null ? new Bundle(restrictions) : new Bundle(); 450 } 451 } 452 453 @Override 454 public void setUserRestrictions(Bundle restrictions, int userId) { 455 checkManageUsersPermission("setUserRestrictions"); 456 if (restrictions == null) return; 457 458 synchronized (mPackagesLock) { 459 mUserRestrictions.get(userId).clear(); 460 mUserRestrictions.get(userId).putAll(restrictions); 461 long token = Binder.clearCallingIdentity(); 462 try { 463 mAppOpsService.setUserRestrictions(mUserRestrictions.get(userId), userId); 464 } catch (RemoteException e) { 465 Log.w(LOG_TAG, "Unable to notify AppOpsService of UserRestrictions"); 466 } finally { 467 Binder.restoreCallingIdentity(token); 468 } 469 writeUserLocked(mUsers.get(userId)); 470 } 471 } 472 473 /** 474 * Check if we've hit the limit of how many users can be created. 475 */ 476 private boolean isUserLimitReachedLocked() { 477 int aliveUserCount = 0; 478 final int totalUserCount = mUsers.size(); 479 // Skip over users being removed 480 for (int i = 0; i < totalUserCount; i++) { 481 UserInfo user = mUsers.valueAt(i); 482 if (!mRemovingUserIds.get(user.id)) { 483 aliveUserCount++; 484 } 485 } 486 return aliveUserCount >= UserManager.getMaxSupportedUsers(); 487 } 488 489 /** 490 * Enforces that only the system UID or root's UID or apps that have the 491 * {@link android.Manifest.permission#MANAGE_USERS MANAGE_USERS} 492 * permission can make certain calls to the UserManager. 493 * 494 * @param message used as message if SecurityException is thrown 495 * @throws SecurityException if the caller is not system or root 496 */ 497 private static final void checkManageUsersPermission(String message) { 498 final int uid = Binder.getCallingUid(); 499 if (uid != Process.SYSTEM_UID && uid != 0 500 && ActivityManager.checkComponentPermission( 501 android.Manifest.permission.MANAGE_USERS, 502 uid, -1, true) != PackageManager.PERMISSION_GRANTED) { 503 throw new SecurityException("You need MANAGE_USERS permission to: " + message); 504 } 505 } 506 507 private void writeBitmapLocked(UserInfo info, Bitmap bitmap) { 508 try { 509 File dir = new File(mUsersDir, Integer.toString(info.id)); 510 File file = new File(dir, USER_PHOTO_FILENAME); 511 if (!dir.exists()) { 512 dir.mkdir(); 513 FileUtils.setPermissions( 514 dir.getPath(), 515 FileUtils.S_IRWXU|FileUtils.S_IRWXG|FileUtils.S_IXOTH, 516 -1, -1); 517 } 518 FileOutputStream os; 519 if (bitmap.compress(Bitmap.CompressFormat.PNG, 100, os = new FileOutputStream(file))) { 520 info.iconPath = file.getAbsolutePath(); 521 } 522 try { 523 os.close(); 524 } catch (IOException ioe) { 525 // What the ... ! 526 } 527 } catch (FileNotFoundException e) { 528 Slog.w(LOG_TAG, "Error setting photo for user ", e); 529 } 530 } 531 532 /** 533 * Returns an array of user ids. This array is cached here for quick access, so do not modify or 534 * cache it elsewhere. 535 * @return the array of user ids. 536 */ 537 public int[] getUserIds() { 538 synchronized (mPackagesLock) { 539 return mUserIds; 540 } 541 } 542 543 int[] getUserIdsLPr() { 544 return mUserIds; 545 } 546 547 private void readUserListLocked() { 548 if (!mUserListFile.exists()) { 549 fallbackToSingleUserLocked(); 550 return; 551 } 552 FileInputStream fis = null; 553 AtomicFile userListFile = new AtomicFile(mUserListFile); 554 try { 555 fis = userListFile.openRead(); 556 XmlPullParser parser = Xml.newPullParser(); 557 parser.setInput(fis, null); 558 int type; 559 while ((type = parser.next()) != XmlPullParser.START_TAG 560 && type != XmlPullParser.END_DOCUMENT) { 561 ; 562 } 563 564 if (type != XmlPullParser.START_TAG) { 565 Slog.e(LOG_TAG, "Unable to read user list"); 566 fallbackToSingleUserLocked(); 567 return; 568 } 569 570 mNextSerialNumber = -1; 571 if (parser.getName().equals(TAG_USERS)) { 572 String lastSerialNumber = parser.getAttributeValue(null, ATTR_NEXT_SERIAL_NO); 573 if (lastSerialNumber != null) { 574 mNextSerialNumber = Integer.parseInt(lastSerialNumber); 575 } 576 String versionNumber = parser.getAttributeValue(null, ATTR_USER_VERSION); 577 if (versionNumber != null) { 578 mUserVersion = Integer.parseInt(versionNumber); 579 } 580 } 581 582 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 583 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 584 String id = parser.getAttributeValue(null, ATTR_ID); 585 UserInfo user = readUserLocked(Integer.parseInt(id)); 586 587 if (user != null) { 588 mUsers.put(user.id, user); 589 if (mNextSerialNumber < 0 || mNextSerialNumber <= user.id) { 590 mNextSerialNumber = user.id + 1; 591 } 592 } 593 } 594 } 595 updateUserIdsLocked(); 596 upgradeIfNecessaryLocked(); 597 } catch (IOException ioe) { 598 fallbackToSingleUserLocked(); 599 } catch (XmlPullParserException pe) { 600 fallbackToSingleUserLocked(); 601 } finally { 602 if (fis != null) { 603 try { 604 fis.close(); 605 } catch (IOException e) { 606 } 607 } 608 } 609 } 610 611 /** 612 * Upgrade steps between versions, either for fixing bugs or changing the data format. 613 */ 614 private void upgradeIfNecessaryLocked() { 615 int userVersion = mUserVersion; 616 if (userVersion < 1) { 617 // Assign a proper name for the owner, if not initialized correctly before 618 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 619 if ("Primary".equals(user.name)) { 620 user.name = mContext.getResources().getString(com.android.internal.R.string.owner_name); 621 writeUserLocked(user); 622 } 623 userVersion = 1; 624 } 625 626 if (userVersion < 2) { 627 // Owner should be marked as initialized 628 UserInfo user = mUsers.get(UserHandle.USER_OWNER); 629 if ((user.flags & UserInfo.FLAG_INITIALIZED) == 0) { 630 user.flags |= UserInfo.FLAG_INITIALIZED; 631 writeUserLocked(user); 632 } 633 userVersion = 2; 634 } 635 636 637 if (userVersion < 4) { 638 userVersion = 4; 639 } 640 641 if (userVersion < USER_VERSION) { 642 Slog.w(LOG_TAG, "User version " + mUserVersion + " didn't upgrade as expected to " 643 + USER_VERSION); 644 } else { 645 mUserVersion = userVersion; 646 writeUserListLocked(); 647 } 648 } 649 650 private void fallbackToSingleUserLocked() { 651 // Create the primary user 652 UserInfo primary = new UserInfo(UserHandle.USER_OWNER, 653 mContext.getResources().getString(com.android.internal.R.string.owner_name), null, 654 UserInfo.FLAG_ADMIN | UserInfo.FLAG_PRIMARY | UserInfo.FLAG_INITIALIZED); 655 mUsers.put(0, primary); 656 mNextSerialNumber = MIN_USER_ID; 657 mUserVersion = USER_VERSION; 658 659 Bundle restrictions = new Bundle(); 660 mUserRestrictions.append(UserHandle.USER_OWNER, restrictions); 661 662 updateUserIdsLocked(); 663 664 writeUserListLocked(); 665 writeUserLocked(primary); 666 } 667 668 /* 669 * Writes the user file in this format: 670 * 671 * <user flags="20039023" id="0"> 672 * <name>Primary</name> 673 * </user> 674 */ 675 private void writeUserLocked(UserInfo userInfo) { 676 FileOutputStream fos = null; 677 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userInfo.id + XML_SUFFIX)); 678 try { 679 fos = userFile.startWrite(); 680 final BufferedOutputStream bos = new BufferedOutputStream(fos); 681 682 // XmlSerializer serializer = XmlUtils.serializerInstance(); 683 final XmlSerializer serializer = new FastXmlSerializer(); 684 serializer.setOutput(bos, "utf-8"); 685 serializer.startDocument(null, true); 686 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 687 688 serializer.startTag(null, TAG_USER); 689 serializer.attribute(null, ATTR_ID, Integer.toString(userInfo.id)); 690 serializer.attribute(null, ATTR_SERIAL_NO, Integer.toString(userInfo.serialNumber)); 691 serializer.attribute(null, ATTR_FLAGS, Integer.toString(userInfo.flags)); 692 serializer.attribute(null, ATTR_CREATION_TIME, Long.toString(userInfo.creationTime)); 693 serializer.attribute(null, ATTR_LAST_LOGGED_IN_TIME, 694 Long.toString(userInfo.lastLoggedInTime)); 695 RestrictionsPinState pinState = mRestrictionsPinStates.get(userInfo.id); 696 if (pinState != null) { 697 if (pinState.salt != 0) { 698 serializer.attribute(null, ATTR_SALT, Long.toString(pinState.salt)); 699 } 700 if (pinState.pinHash != null) { 701 serializer.attribute(null, ATTR_PIN_HASH, pinState.pinHash); 702 } 703 if (pinState.failedAttempts != 0) { 704 serializer.attribute(null, ATTR_FAILED_ATTEMPTS, 705 Integer.toString(pinState.failedAttempts)); 706 serializer.attribute(null, ATTR_LAST_RETRY_MS, 707 Long.toString(pinState.lastAttemptTime)); 708 } 709 } 710 if (userInfo.iconPath != null) { 711 serializer.attribute(null, ATTR_ICON_PATH, userInfo.iconPath); 712 } 713 if (userInfo.partial) { 714 serializer.attribute(null, ATTR_PARTIAL, "true"); 715 } 716 if (userInfo.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID) { 717 serializer.attribute(null, ATTR_PROFILE_GROUP_ID, 718 Integer.toString(userInfo.profileGroupId)); 719 } 720 721 serializer.startTag(null, TAG_NAME); 722 serializer.text(userInfo.name); 723 serializer.endTag(null, TAG_NAME); 724 725 Bundle restrictions = mUserRestrictions.get(userInfo.id); 726 if (restrictions != null) { 727 serializer.startTag(null, TAG_RESTRICTIONS); 728 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 729 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 730 writeBoolean(serializer, restrictions, UserManager.DISALLOW_INSTALL_APPS); 731 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 732 writeBoolean(serializer, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 733 writeBoolean(serializer, restrictions, 734 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 735 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 736 writeBoolean(serializer, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 737 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 738 writeBoolean(serializer, restrictions, UserManager.DISALLOW_REMOVE_USER); 739 writeBoolean(serializer, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 740 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_VPN); 741 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 742 writeBoolean(serializer, restrictions, UserManager.DISALLOW_FACTORY_RESET); 743 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADD_USER); 744 writeBoolean(serializer, restrictions, UserManager.ENSURE_VERIFY_APPS); 745 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 746 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 747 writeBoolean(serializer, restrictions, UserManager.DISALLOW_CONFIG_APPS); 748 writeBoolean(serializer, restrictions, UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 749 writeBoolean(serializer, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 750 writeBoolean(serializer, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 751 writeBoolean(serializer, restrictions, UserManager.DISALLOW_TELEPHONY); 752 serializer.endTag(null, TAG_RESTRICTIONS); 753 } 754 serializer.endTag(null, TAG_USER); 755 756 serializer.endDocument(); 757 userFile.finishWrite(fos); 758 } catch (Exception ioe) { 759 Slog.e(LOG_TAG, "Error writing user info " + userInfo.id + "\n" + ioe); 760 userFile.failWrite(fos); 761 } 762 } 763 764 /* 765 * Writes the user list file in this format: 766 * 767 * <users nextSerialNumber="3"> 768 * <user id="0"></user> 769 * <user id="2"></user> 770 * </users> 771 */ 772 private void writeUserListLocked() { 773 FileOutputStream fos = null; 774 AtomicFile userListFile = new AtomicFile(mUserListFile); 775 try { 776 fos = userListFile.startWrite(); 777 final BufferedOutputStream bos = new BufferedOutputStream(fos); 778 779 // XmlSerializer serializer = XmlUtils.serializerInstance(); 780 final XmlSerializer serializer = new FastXmlSerializer(); 781 serializer.setOutput(bos, "utf-8"); 782 serializer.startDocument(null, true); 783 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 784 785 serializer.startTag(null, TAG_USERS); 786 serializer.attribute(null, ATTR_NEXT_SERIAL_NO, Integer.toString(mNextSerialNumber)); 787 serializer.attribute(null, ATTR_USER_VERSION, Integer.toString(mUserVersion)); 788 789 for (int i = 0; i < mUsers.size(); i++) { 790 UserInfo user = mUsers.valueAt(i); 791 serializer.startTag(null, TAG_USER); 792 serializer.attribute(null, ATTR_ID, Integer.toString(user.id)); 793 serializer.endTag(null, TAG_USER); 794 } 795 796 serializer.endTag(null, TAG_USERS); 797 798 serializer.endDocument(); 799 userListFile.finishWrite(fos); 800 } catch (Exception e) { 801 userListFile.failWrite(fos); 802 Slog.e(LOG_TAG, "Error writing user list"); 803 } 804 } 805 806 private UserInfo readUserLocked(int id) { 807 int flags = 0; 808 int serialNumber = id; 809 String name = null; 810 String iconPath = null; 811 long creationTime = 0L; 812 long lastLoggedInTime = 0L; 813 long salt = 0L; 814 String pinHash = null; 815 int failedAttempts = 0; 816 int profileGroupId = UserInfo.NO_PROFILE_GROUP_ID; 817 long lastAttemptTime = 0L; 818 boolean partial = false; 819 Bundle restrictions = new Bundle(); 820 821 FileInputStream fis = null; 822 try { 823 AtomicFile userFile = 824 new AtomicFile(new File(mUsersDir, Integer.toString(id) + XML_SUFFIX)); 825 fis = userFile.openRead(); 826 XmlPullParser parser = Xml.newPullParser(); 827 parser.setInput(fis, null); 828 int type; 829 while ((type = parser.next()) != XmlPullParser.START_TAG 830 && type != XmlPullParser.END_DOCUMENT) { 831 ; 832 } 833 834 if (type != XmlPullParser.START_TAG) { 835 Slog.e(LOG_TAG, "Unable to read user " + id); 836 return null; 837 } 838 839 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_USER)) { 840 int storedId = readIntAttribute(parser, ATTR_ID, -1); 841 if (storedId != id) { 842 Slog.e(LOG_TAG, "User id does not match the file name"); 843 return null; 844 } 845 serialNumber = readIntAttribute(parser, ATTR_SERIAL_NO, id); 846 flags = readIntAttribute(parser, ATTR_FLAGS, 0); 847 iconPath = parser.getAttributeValue(null, ATTR_ICON_PATH); 848 creationTime = readLongAttribute(parser, ATTR_CREATION_TIME, 0); 849 lastLoggedInTime = readLongAttribute(parser, ATTR_LAST_LOGGED_IN_TIME, 0); 850 salt = readLongAttribute(parser, ATTR_SALT, 0L); 851 pinHash = parser.getAttributeValue(null, ATTR_PIN_HASH); 852 failedAttempts = readIntAttribute(parser, ATTR_FAILED_ATTEMPTS, 0); 853 lastAttemptTime = readLongAttribute(parser, ATTR_LAST_RETRY_MS, 0L); 854 profileGroupId = readIntAttribute(parser, ATTR_PROFILE_GROUP_ID, 855 UserInfo.NO_PROFILE_GROUP_ID); 856 if (profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 857 // This attribute was added and renamed during development of L. 858 // TODO Remove upgrade path by 1st May 2014 859 profileGroupId = readIntAttribute(parser, "relatedGroupId", 860 UserInfo.NO_PROFILE_GROUP_ID); 861 } 862 String valueString = parser.getAttributeValue(null, ATTR_PARTIAL); 863 if ("true".equals(valueString)) { 864 partial = true; 865 } 866 867 int outerDepth = parser.getDepth(); 868 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT 869 && (type != XmlPullParser.END_TAG || parser.getDepth() > outerDepth)) { 870 if (type == XmlPullParser.END_TAG || type == XmlPullParser.TEXT) { 871 continue; 872 } 873 String tag = parser.getName(); 874 if (TAG_NAME.equals(tag)) { 875 type = parser.next(); 876 if (type == XmlPullParser.TEXT) { 877 name = parser.getText(); 878 } 879 } else if (TAG_RESTRICTIONS.equals(tag)) { 880 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_WIFI); 881 readBoolean(parser, restrictions, UserManager.DISALLOW_MODIFY_ACCOUNTS); 882 readBoolean(parser, restrictions, UserManager.DISALLOW_INSTALL_APPS); 883 readBoolean(parser, restrictions, UserManager.DISALLOW_UNINSTALL_APPS); 884 readBoolean(parser, restrictions, UserManager.DISALLOW_SHARE_LOCATION); 885 readBoolean(parser, restrictions, 886 UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES); 887 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_BLUETOOTH); 888 readBoolean(parser, restrictions, UserManager.DISALLOW_USB_FILE_TRANSFER); 889 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CREDENTIALS); 890 readBoolean(parser, restrictions, UserManager.DISALLOW_REMOVE_USER); 891 readBoolean(parser, restrictions, UserManager.DISALLOW_DEBUGGING_FEATURES); 892 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_VPN); 893 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_TETHERING); 894 readBoolean(parser, restrictions, UserManager.DISALLOW_FACTORY_RESET); 895 readBoolean(parser, restrictions, UserManager.DISALLOW_ADD_USER); 896 readBoolean(parser, restrictions, UserManager.ENSURE_VERIFY_APPS); 897 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_CELL_BROADCASTS); 898 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_MOBILE_NETWORKS); 899 readBoolean(parser, restrictions, UserManager.DISALLOW_CONFIG_APPS); 900 readBoolean(parser, restrictions, 901 UserManager.DISALLOW_MOUNT_PHYSICAL_MEDIA); 902 readBoolean(parser, restrictions, UserManager.DISALLOW_UNMUTE_MICROPHONE); 903 readBoolean(parser, restrictions, UserManager.DISALLOW_ADJUST_VOLUME); 904 readBoolean(parser, restrictions, UserManager.DISALLOW_TELEPHONY); 905 } 906 } 907 } 908 909 UserInfo userInfo = new UserInfo(id, name, iconPath, flags); 910 userInfo.serialNumber = serialNumber; 911 userInfo.creationTime = creationTime; 912 userInfo.lastLoggedInTime = lastLoggedInTime; 913 userInfo.partial = partial; 914 userInfo.profileGroupId = profileGroupId; 915 mUserRestrictions.append(id, restrictions); 916 if (salt != 0L) { 917 RestrictionsPinState pinState = mRestrictionsPinStates.get(id); 918 if (pinState == null) { 919 pinState = new RestrictionsPinState(); 920 mRestrictionsPinStates.put(id, pinState); 921 } 922 pinState.salt = salt; 923 pinState.pinHash = pinHash; 924 pinState.failedAttempts = failedAttempts; 925 pinState.lastAttemptTime = lastAttemptTime; 926 } 927 return userInfo; 928 929 } catch (IOException ioe) { 930 } catch (XmlPullParserException pe) { 931 } finally { 932 if (fis != null) { 933 try { 934 fis.close(); 935 } catch (IOException e) { 936 } 937 } 938 } 939 return null; 940 } 941 942 private void readBoolean(XmlPullParser parser, Bundle restrictions, 943 String restrictionKey) { 944 String value = parser.getAttributeValue(null, restrictionKey); 945 if (value != null) { 946 restrictions.putBoolean(restrictionKey, Boolean.parseBoolean(value)); 947 } 948 } 949 950 private void writeBoolean(XmlSerializer xml, Bundle restrictions, String restrictionKey) 951 throws IOException { 952 if (restrictions.containsKey(restrictionKey)) { 953 xml.attribute(null, restrictionKey, 954 Boolean.toString(restrictions.getBoolean(restrictionKey))); 955 } 956 } 957 958 private int readIntAttribute(XmlPullParser parser, String attr, int defaultValue) { 959 String valueString = parser.getAttributeValue(null, attr); 960 if (valueString == null) return defaultValue; 961 try { 962 return Integer.parseInt(valueString); 963 } catch (NumberFormatException nfe) { 964 return defaultValue; 965 } 966 } 967 968 private long readLongAttribute(XmlPullParser parser, String attr, long defaultValue) { 969 String valueString = parser.getAttributeValue(null, attr); 970 if (valueString == null) return defaultValue; 971 try { 972 return Long.parseLong(valueString); 973 } catch (NumberFormatException nfe) { 974 return defaultValue; 975 } 976 } 977 978 private boolean isPackageInstalled(String pkg, int userId) { 979 final ApplicationInfo info = mPm.getApplicationInfo(pkg, 980 PackageManager.GET_UNINSTALLED_PACKAGES, 981 userId); 982 if (info == null || (info.flags&ApplicationInfo.FLAG_INSTALLED) == 0) { 983 return false; 984 } 985 return true; 986 } 987 988 /** 989 * Removes all the restrictions files (res_<packagename>) for a given user, if all is true, 990 * else removes only those packages that have been uninstalled. 991 * Does not do any permissions checking. 992 */ 993 private void cleanAppRestrictions(int userId, boolean all) { 994 synchronized (mPackagesLock) { 995 File dir = Environment.getUserSystemDirectory(userId); 996 String[] files = dir.list(); 997 if (files == null) return; 998 for (String fileName : files) { 999 if (fileName.startsWith(RESTRICTIONS_FILE_PREFIX)) { 1000 File resFile = new File(dir, fileName); 1001 if (resFile.exists()) { 1002 if (all) { 1003 resFile.delete(); 1004 } else { 1005 String pkg = restrictionsFileNameToPackage(fileName); 1006 if (!isPackageInstalled(pkg, userId)) { 1007 resFile.delete(); 1008 } 1009 } 1010 } 1011 } 1012 } 1013 } 1014 } 1015 1016 /** 1017 * Removes the app restrictions file for a specific package and user id, if it exists. 1018 */ 1019 private void cleanAppRestrictionsForPackage(String pkg, int userId) { 1020 synchronized (mPackagesLock) { 1021 File dir = Environment.getUserSystemDirectory(userId); 1022 File resFile = new File(dir, packageToRestrictionsFileName(pkg)); 1023 if (resFile.exists()) { 1024 resFile.delete(); 1025 } 1026 } 1027 } 1028 1029 @Override 1030 public UserInfo createProfileForUser(String name, int flags, int userId) { 1031 checkManageUsersPermission("Only the system can create users"); 1032 if (userId != UserHandle.USER_OWNER) { 1033 Slog.w(LOG_TAG, "Only user owner can have profiles"); 1034 return null; 1035 } 1036 return createUserInternal(name, flags, userId); 1037 } 1038 1039 @Override 1040 public UserInfo createUser(String name, int flags) { 1041 checkManageUsersPermission("Only the system can create users"); 1042 return createUserInternal(name, flags, UserHandle.USER_NULL); 1043 } 1044 1045 private UserInfo createUserInternal(String name, int flags, int parentId) { 1046 final long ident = Binder.clearCallingIdentity(); 1047 UserInfo userInfo = null; 1048 try { 1049 synchronized (mInstallLock) { 1050 synchronized (mPackagesLock) { 1051 UserInfo parent = null; 1052 if (parentId != UserHandle.USER_NULL) { 1053 parent = getUserInfoLocked(parentId); 1054 if (parent == null) return null; 1055 } 1056 if (isUserLimitReachedLocked()) return null; 1057 int userId = getNextAvailableIdLocked(); 1058 userInfo = new UserInfo(userId, name, null, flags); 1059 File userPath = new File(mBaseUserPath, Integer.toString(userId)); 1060 userInfo.serialNumber = mNextSerialNumber++; 1061 long now = System.currentTimeMillis(); 1062 userInfo.creationTime = (now > EPOCH_PLUS_30_YEARS) ? now : 0; 1063 userInfo.partial = true; 1064 Environment.getUserSystemDirectory(userInfo.id).mkdirs(); 1065 mUsers.put(userId, userInfo); 1066 writeUserListLocked(); 1067 if (parent != null) { 1068 if (parent.profileGroupId == UserInfo.NO_PROFILE_GROUP_ID) { 1069 parent.profileGroupId = parent.id; 1070 writeUserLocked(parent); 1071 } 1072 userInfo.profileGroupId = parent.profileGroupId; 1073 } 1074 writeUserLocked(userInfo); 1075 mPm.createNewUserLILPw(userId, userPath); 1076 userInfo.partial = false; 1077 writeUserLocked(userInfo); 1078 updateUserIdsLocked(); 1079 Bundle restrictions = new Bundle(); 1080 mUserRestrictions.append(userId, restrictions); 1081 } 1082 } 1083 if (userInfo != null) { 1084 Intent addedIntent = new Intent(Intent.ACTION_USER_ADDED); 1085 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userInfo.id); 1086 mContext.sendBroadcastAsUser(addedIntent, UserHandle.ALL, 1087 android.Manifest.permission.MANAGE_USERS); 1088 } 1089 } finally { 1090 Binder.restoreCallingIdentity(ident); 1091 } 1092 return userInfo; 1093 } 1094 1095 /** 1096 * Removes a user and all data directories created for that user. This method should be called 1097 * after the user's processes have been terminated. 1098 * @param userHandle the user's id 1099 */ 1100 public boolean removeUser(int userHandle) { 1101 checkManageUsersPermission("Only the system can remove users"); 1102 long ident = Binder.clearCallingIdentity(); 1103 try { 1104 final UserInfo user; 1105 synchronized (mPackagesLock) { 1106 user = mUsers.get(userHandle); 1107 if (userHandle == 0 || user == null) { 1108 return false; 1109 } 1110 mRemovingUserIds.put(userHandle, true); 1111 try { 1112 mAppOpsService.removeUser(userHandle); 1113 } catch (RemoteException e) { 1114 Log.w(LOG_TAG, "Unable to notify AppOpsService of removing user", e); 1115 } 1116 // Set this to a partially created user, so that the user will be purged 1117 // on next startup, in case the runtime stops now before stopping and 1118 // removing the user completely. 1119 user.partial = true; 1120 // Mark it as disabled, so that it isn't returned any more when 1121 // profiles are queried. 1122 user.flags |= UserInfo.FLAG_DISABLED; 1123 writeUserLocked(user); 1124 } 1125 1126 if (user.profileGroupId != UserInfo.NO_PROFILE_GROUP_ID 1127 && user.isManagedProfile()) { 1128 // Send broadcast to notify system that the user removed was a 1129 // managed user. 1130 sendProfileRemovedBroadcast(user.profileGroupId, user.id); 1131 } 1132 1133 if (DBG) Slog.i(LOG_TAG, "Stopping user " + userHandle); 1134 int res; 1135 try { 1136 res = ActivityManagerNative.getDefault().stopUser(userHandle, 1137 new IStopUserCallback.Stub() { 1138 @Override 1139 public void userStopped(int userId) { 1140 finishRemoveUser(userId); 1141 } 1142 @Override 1143 public void userStopAborted(int userId) { 1144 } 1145 }); 1146 } catch (RemoteException e) { 1147 return false; 1148 } 1149 return res == ActivityManager.USER_OP_SUCCESS; 1150 } finally { 1151 Binder.restoreCallingIdentity(ident); 1152 } 1153 } 1154 1155 void finishRemoveUser(final int userHandle) { 1156 if (DBG) Slog.i(LOG_TAG, "finishRemoveUser " + userHandle); 1157 // Let other services shutdown any activity and clean up their state before completely 1158 // wiping the user's system directory and removing from the user list 1159 long ident = Binder.clearCallingIdentity(); 1160 try { 1161 Intent addedIntent = new Intent(Intent.ACTION_USER_REMOVED); 1162 addedIntent.putExtra(Intent.EXTRA_USER_HANDLE, userHandle); 1163 mContext.sendOrderedBroadcastAsUser(addedIntent, UserHandle.ALL, 1164 android.Manifest.permission.MANAGE_USERS, 1165 1166 new BroadcastReceiver() { 1167 @Override 1168 public void onReceive(Context context, Intent intent) { 1169 if (DBG) { 1170 Slog.i(LOG_TAG, 1171 "USER_REMOVED broadcast sent, cleaning up user data " 1172 + userHandle); 1173 } 1174 new Thread() { 1175 public void run() { 1176 synchronized (mInstallLock) { 1177 synchronized (mPackagesLock) { 1178 removeUserStateLocked(userHandle); 1179 } 1180 } 1181 } 1182 }.start(); 1183 } 1184 }, 1185 1186 null, Activity.RESULT_OK, null, null); 1187 } finally { 1188 Binder.restoreCallingIdentity(ident); 1189 } 1190 } 1191 1192 private void removeUserStateLocked(final int userHandle) { 1193 // Cleanup package manager settings 1194 mPm.cleanUpUserLILPw(userHandle); 1195 1196 // Remove this user from the list 1197 mUsers.remove(userHandle); 1198 1199 // Have user ID linger for several seconds to let external storage VFS 1200 // cache entries expire. This must be greater than the 'entry_valid' 1201 // timeout used by the FUSE daemon. 1202 mHandler.postDelayed(new Runnable() { 1203 @Override 1204 public void run() { 1205 synchronized (mPackagesLock) { 1206 mRemovingUserIds.delete(userHandle); 1207 } 1208 } 1209 }, MINUTE_IN_MILLIS); 1210 1211 mRestrictionsPinStates.remove(userHandle); 1212 // Remove user file 1213 AtomicFile userFile = new AtomicFile(new File(mUsersDir, userHandle + XML_SUFFIX)); 1214 userFile.delete(); 1215 // Update the user list 1216 writeUserListLocked(); 1217 updateUserIdsLocked(); 1218 removeDirectoryRecursive(Environment.getUserSystemDirectory(userHandle)); 1219 } 1220 1221 private void removeDirectoryRecursive(File parent) { 1222 if (parent.isDirectory()) { 1223 String[] files = parent.list(); 1224 for (String filename : files) { 1225 File child = new File(parent, filename); 1226 removeDirectoryRecursive(child); 1227 } 1228 } 1229 parent.delete(); 1230 } 1231 1232 private void sendProfileRemovedBroadcast(int parentUserId, int removedUserId) { 1233 Intent managedProfileIntent = new Intent(Intent.ACTION_MANAGED_PROFILE_REMOVED); 1234 managedProfileIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY | 1235 Intent.FLAG_RECEIVER_FOREGROUND); 1236 managedProfileIntent.putExtra(Intent.EXTRA_USER, new UserHandle(removedUserId)); 1237 mContext.sendBroadcastAsUser(managedProfileIntent, new UserHandle(parentUserId), null); 1238 } 1239 1240 @Override 1241 public Bundle getApplicationRestrictions(String packageName) { 1242 return getApplicationRestrictionsForUser(packageName, UserHandle.getCallingUserId()); 1243 } 1244 1245 @Override 1246 public Bundle getApplicationRestrictionsForUser(String packageName, int userId) { 1247 if (UserHandle.getCallingUserId() != userId 1248 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1249 checkManageUsersPermission("Only system can get restrictions for other users/apps"); 1250 } 1251 synchronized (mPackagesLock) { 1252 // Read the restrictions from XML 1253 return readApplicationRestrictionsLocked(packageName, userId); 1254 } 1255 } 1256 1257 @Override 1258 public void setApplicationRestrictions(String packageName, Bundle restrictions, 1259 int userId) { 1260 if (UserHandle.getCallingUserId() != userId 1261 || !UserHandle.isSameApp(Binder.getCallingUid(), getUidForPackage(packageName))) { 1262 checkManageUsersPermission("Only system can set restrictions for other users/apps"); 1263 } 1264 synchronized (mPackagesLock) { 1265 // Write the restrictions to XML 1266 writeApplicationRestrictionsLocked(packageName, restrictions, userId); 1267 } 1268 1269 // Notify package of changes via an intent - only sent to explicitly registered receivers. 1270 Intent changeIntent = new Intent(Intent.ACTION_APPLICATION_RESTRICTIONS_CHANGED); 1271 changeIntent.setPackage(packageName); 1272 changeIntent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1273 mContext.sendBroadcastAsUser(changeIntent, new UserHandle(userId)); 1274 } 1275 1276 @Override 1277 public boolean setRestrictionsChallenge(String newPin) { 1278 checkManageUsersPermission("Only system can modify the restrictions pin"); 1279 int userId = UserHandle.getCallingUserId(); 1280 synchronized (mPackagesLock) { 1281 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1282 if (pinState == null) { 1283 pinState = new RestrictionsPinState(); 1284 } 1285 if (newPin == null) { 1286 pinState.salt = 0; 1287 pinState.pinHash = null; 1288 } else { 1289 try { 1290 pinState.salt = SecureRandom.getInstance("SHA1PRNG").nextLong(); 1291 } catch (NoSuchAlgorithmException e) { 1292 pinState.salt = (long) (Math.random() * Long.MAX_VALUE); 1293 } 1294 pinState.pinHash = passwordToHash(newPin, pinState.salt); 1295 pinState.failedAttempts = 0; 1296 } 1297 mRestrictionsPinStates.put(userId, pinState); 1298 writeUserLocked(mUsers.get(userId)); 1299 } 1300 return true; 1301 } 1302 1303 @Override 1304 public int checkRestrictionsChallenge(String pin) { 1305 checkManageUsersPermission("Only system can verify the restrictions pin"); 1306 int userId = UserHandle.getCallingUserId(); 1307 synchronized (mPackagesLock) { 1308 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1309 // If there's no pin set, return error code 1310 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1311 return UserManager.PIN_VERIFICATION_FAILED_NOT_SET; 1312 } else if (pin == null) { 1313 // If just checking if user can be prompted, return remaining time 1314 int waitTime = getRemainingTimeForPinAttempt(pinState); 1315 Slog.d(LOG_TAG, "Remaining waittime peek=" + waitTime); 1316 return waitTime; 1317 } else { 1318 int waitTime = getRemainingTimeForPinAttempt(pinState); 1319 Slog.d(LOG_TAG, "Remaining waittime=" + waitTime); 1320 if (waitTime > 0) { 1321 return waitTime; 1322 } 1323 if (passwordToHash(pin, pinState.salt).equals(pinState.pinHash)) { 1324 pinState.failedAttempts = 0; 1325 writeUserLocked(mUsers.get(userId)); 1326 return UserManager.PIN_VERIFICATION_SUCCESS; 1327 } else { 1328 pinState.failedAttempts++; 1329 pinState.lastAttemptTime = System.currentTimeMillis(); 1330 writeUserLocked(mUsers.get(userId)); 1331 return waitTime; 1332 } 1333 } 1334 } 1335 } 1336 1337 private int getRemainingTimeForPinAttempt(RestrictionsPinState pinState) { 1338 int backoffIndex = Math.min(pinState.failedAttempts / BACKOFF_INC_INTERVAL, 1339 BACKOFF_TIMES.length - 1); 1340 int backoffTime = (pinState.failedAttempts % BACKOFF_INC_INTERVAL) == 0 ? 1341 BACKOFF_TIMES[backoffIndex] : 0; 1342 return (int) Math.max(backoffTime + pinState.lastAttemptTime - System.currentTimeMillis(), 1343 0); 1344 } 1345 1346 @Override 1347 public boolean hasRestrictionsChallenge() { 1348 int userId = UserHandle.getCallingUserId(); 1349 synchronized (mPackagesLock) { 1350 return hasRestrictionsPinLocked(userId); 1351 } 1352 } 1353 1354 private boolean hasRestrictionsPinLocked(int userId) { 1355 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1356 if (pinState == null || pinState.salt == 0 || pinState.pinHash == null) { 1357 return false; 1358 } 1359 return true; 1360 } 1361 1362 @Override 1363 public void removeRestrictions() { 1364 checkManageUsersPermission("Only system can remove restrictions"); 1365 final int userHandle = UserHandle.getCallingUserId(); 1366 removeRestrictionsForUser(userHandle, true); 1367 } 1368 1369 private void removeRestrictionsForUser(final int userHandle, boolean unblockApps) { 1370 synchronized (mPackagesLock) { 1371 // Remove all user restrictions 1372 setUserRestrictions(new Bundle(), userHandle); 1373 // Remove restrictions pin 1374 setRestrictionsChallenge(null); 1375 // Remove any app restrictions 1376 cleanAppRestrictions(userHandle, true); 1377 } 1378 if (unblockApps) { 1379 unblockAllAppsForUser(userHandle); 1380 } 1381 } 1382 1383 private void unblockAllAppsForUser(final int userHandle) { 1384 mHandler.post(new Runnable() { 1385 @Override 1386 public void run() { 1387 List<ApplicationInfo> apps = 1388 mPm.getInstalledApplications(PackageManager.GET_UNINSTALLED_PACKAGES, 1389 userHandle).getList(); 1390 final long ident = Binder.clearCallingIdentity(); 1391 try { 1392 for (ApplicationInfo appInfo : apps) { 1393 if ((appInfo.flags & ApplicationInfo.FLAG_INSTALLED) != 0 1394 && (appInfo.flags & ApplicationInfo.FLAG_BLOCKED) != 0) { 1395 mPm.setApplicationBlockedSettingAsUser(appInfo.packageName, false, 1396 userHandle); 1397 } 1398 } 1399 } finally { 1400 Binder.restoreCallingIdentity(ident); 1401 } 1402 } 1403 }); 1404 } 1405 1406 /* 1407 * Generate a hash for the given password. To avoid brute force attacks, we use a salted hash. 1408 * Not the most secure, but it is at least a second level of protection. First level is that 1409 * the file is in a location only readable by the system process. 1410 * @param password the password. 1411 * @param salt the randomly generated salt 1412 * @return the hash of the pattern in a String. 1413 */ 1414 private String passwordToHash(String password, long salt) { 1415 if (password == null) { 1416 return null; 1417 } 1418 String algo = null; 1419 String hashed = salt + password; 1420 try { 1421 byte[] saltedPassword = (password + salt).getBytes(); 1422 byte[] sha1 = MessageDigest.getInstance(algo = "SHA-1").digest(saltedPassword); 1423 byte[] md5 = MessageDigest.getInstance(algo = "MD5").digest(saltedPassword); 1424 hashed = toHex(sha1) + toHex(md5); 1425 } catch (NoSuchAlgorithmException e) { 1426 Log.w(LOG_TAG, "Failed to encode string because of missing algorithm: " + algo); 1427 } 1428 return hashed; 1429 } 1430 1431 private static String toHex(byte[] ary) { 1432 final String hex = "0123456789ABCDEF"; 1433 String ret = ""; 1434 for (int i = 0; i < ary.length; i++) { 1435 ret += hex.charAt((ary[i] >> 4) & 0xf); 1436 ret += hex.charAt(ary[i] & 0xf); 1437 } 1438 return ret; 1439 } 1440 1441 private int getUidForPackage(String packageName) { 1442 long ident = Binder.clearCallingIdentity(); 1443 try { 1444 return mContext.getPackageManager().getApplicationInfo(packageName, 1445 PackageManager.GET_UNINSTALLED_PACKAGES).uid; 1446 } catch (NameNotFoundException nnfe) { 1447 return -1; 1448 } finally { 1449 Binder.restoreCallingIdentity(ident); 1450 } 1451 } 1452 1453 private Bundle readApplicationRestrictionsLocked(String packageName, 1454 int userId) { 1455 final Bundle restrictions = new Bundle(); 1456 final ArrayList<String> values = new ArrayList<String>(); 1457 1458 FileInputStream fis = null; 1459 try { 1460 AtomicFile restrictionsFile = 1461 new AtomicFile(new File(Environment.getUserSystemDirectory(userId), 1462 packageToRestrictionsFileName(packageName))); 1463 fis = restrictionsFile.openRead(); 1464 XmlPullParser parser = Xml.newPullParser(); 1465 parser.setInput(fis, null); 1466 int type; 1467 while ((type = parser.next()) != XmlPullParser.START_TAG 1468 && type != XmlPullParser.END_DOCUMENT) { 1469 ; 1470 } 1471 1472 if (type != XmlPullParser.START_TAG) { 1473 Slog.e(LOG_TAG, "Unable to read restrictions file " 1474 + restrictionsFile.getBaseFile()); 1475 return restrictions; 1476 } 1477 1478 while ((type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1479 if (type == XmlPullParser.START_TAG && parser.getName().equals(TAG_ENTRY)) { 1480 String key = parser.getAttributeValue(null, ATTR_KEY); 1481 String valType = parser.getAttributeValue(null, ATTR_VALUE_TYPE); 1482 String multiple = parser.getAttributeValue(null, ATTR_MULTIPLE); 1483 if (multiple != null) { 1484 int count = Integer.parseInt(multiple); 1485 while (count > 0 && (type = parser.next()) != XmlPullParser.END_DOCUMENT) { 1486 if (type == XmlPullParser.START_TAG 1487 && parser.getName().equals(TAG_VALUE)) { 1488 values.add(parser.nextText().trim()); 1489 count--; 1490 } 1491 } 1492 String [] valueStrings = new String[values.size()]; 1493 values.toArray(valueStrings); 1494 restrictions.putStringArray(key, valueStrings); 1495 } else { 1496 String value = parser.nextText().trim(); 1497 if (ATTR_TYPE_BOOLEAN.equals(valType)) { 1498 restrictions.putBoolean(key, Boolean.parseBoolean(value)); 1499 } else if (ATTR_TYPE_INTEGER.equals(valType)) { 1500 restrictions.putInt(key, Integer.parseInt(value)); 1501 } else { 1502 restrictions.putString(key, value); 1503 } 1504 } 1505 } 1506 } 1507 } catch (IOException ioe) { 1508 } catch (XmlPullParserException pe) { 1509 } finally { 1510 if (fis != null) { 1511 try { 1512 fis.close(); 1513 } catch (IOException e) { 1514 } 1515 } 1516 } 1517 return restrictions; 1518 } 1519 1520 private void writeApplicationRestrictionsLocked(String packageName, 1521 Bundle restrictions, int userId) { 1522 FileOutputStream fos = null; 1523 AtomicFile restrictionsFile = new AtomicFile( 1524 new File(Environment.getUserSystemDirectory(userId), 1525 packageToRestrictionsFileName(packageName))); 1526 try { 1527 fos = restrictionsFile.startWrite(); 1528 final BufferedOutputStream bos = new BufferedOutputStream(fos); 1529 1530 // XmlSerializer serializer = XmlUtils.serializerInstance(); 1531 final XmlSerializer serializer = new FastXmlSerializer(); 1532 serializer.setOutput(bos, "utf-8"); 1533 serializer.startDocument(null, true); 1534 serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); 1535 1536 serializer.startTag(null, TAG_RESTRICTIONS); 1537 1538 for (String key : restrictions.keySet()) { 1539 Object value = restrictions.get(key); 1540 serializer.startTag(null, TAG_ENTRY); 1541 serializer.attribute(null, ATTR_KEY, key); 1542 1543 if (value instanceof Boolean) { 1544 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_BOOLEAN); 1545 serializer.text(value.toString()); 1546 } else if (value instanceof Integer) { 1547 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_INTEGER); 1548 serializer.text(value.toString()); 1549 } else if (value == null || value instanceof String) { 1550 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING); 1551 serializer.text(value != null ? (String) value : ""); 1552 } else { 1553 serializer.attribute(null, ATTR_VALUE_TYPE, ATTR_TYPE_STRING_ARRAY); 1554 String[] values = (String[]) value; 1555 serializer.attribute(null, ATTR_MULTIPLE, Integer.toString(values.length)); 1556 for (String choice : values) { 1557 serializer.startTag(null, TAG_VALUE); 1558 serializer.text(choice != null ? choice : ""); 1559 serializer.endTag(null, TAG_VALUE); 1560 } 1561 } 1562 serializer.endTag(null, TAG_ENTRY); 1563 } 1564 1565 serializer.endTag(null, TAG_RESTRICTIONS); 1566 1567 serializer.endDocument(); 1568 restrictionsFile.finishWrite(fos); 1569 } catch (Exception e) { 1570 restrictionsFile.failWrite(fos); 1571 Slog.e(LOG_TAG, "Error writing application restrictions list"); 1572 } 1573 } 1574 1575 @Override 1576 public int getUserSerialNumber(int userHandle) { 1577 synchronized (mPackagesLock) { 1578 if (!exists(userHandle)) return -1; 1579 return getUserInfoLocked(userHandle).serialNumber; 1580 } 1581 } 1582 1583 @Override 1584 public int getUserHandle(int userSerialNumber) { 1585 synchronized (mPackagesLock) { 1586 for (int userId : mUserIds) { 1587 if (getUserInfoLocked(userId).serialNumber == userSerialNumber) return userId; 1588 } 1589 // Not found 1590 return -1; 1591 } 1592 } 1593 1594 /** 1595 * Caches the list of user ids in an array, adjusting the array size when necessary. 1596 */ 1597 private void updateUserIdsLocked() { 1598 int num = 0; 1599 for (int i = 0; i < mUsers.size(); i++) { 1600 if (!mUsers.valueAt(i).partial) { 1601 num++; 1602 } 1603 } 1604 final int[] newUsers = new int[num]; 1605 int n = 0; 1606 for (int i = 0; i < mUsers.size(); i++) { 1607 if (!mUsers.valueAt(i).partial) { 1608 newUsers[n++] = mUsers.keyAt(i); 1609 } 1610 } 1611 mUserIds = newUsers; 1612 } 1613 1614 /** 1615 * Make a note of the last started time of a user and do some cleanup. 1616 * @param userId the user that was just foregrounded 1617 */ 1618 public void userForeground(int userId) { 1619 synchronized (mPackagesLock) { 1620 UserInfo user = mUsers.get(userId); 1621 long now = System.currentTimeMillis(); 1622 if (user == null || user.partial) { 1623 Slog.w(LOG_TAG, "userForeground: unknown user #" + userId); 1624 return; 1625 } 1626 if (now > EPOCH_PLUS_30_YEARS) { 1627 user.lastLoggedInTime = now; 1628 writeUserLocked(user); 1629 } 1630 // If this is not a restricted profile and there is no restrictions pin, clean up 1631 // all restrictions files that might have been left behind, else clean up just the 1632 // ones with uninstalled packages 1633 RestrictionsPinState pinState = mRestrictionsPinStates.get(userId); 1634 final long salt = pinState == null ? 0 : pinState.salt; 1635 cleanAppRestrictions(userId, (!user.isRestricted() && salt == 0)); 1636 } 1637 } 1638 1639 /** 1640 * Returns the next available user id, filling in any holes in the ids. 1641 * TODO: May not be a good idea to recycle ids, in case it results in confusion 1642 * for data and battery stats collection, or unexpected cross-talk. 1643 * @return 1644 */ 1645 private int getNextAvailableIdLocked() { 1646 synchronized (mPackagesLock) { 1647 int i = MIN_USER_ID; 1648 while (i < Integer.MAX_VALUE) { 1649 if (mUsers.indexOfKey(i) < 0 && !mRemovingUserIds.get(i)) { 1650 break; 1651 } 1652 i++; 1653 } 1654 return i; 1655 } 1656 } 1657 1658 private String packageToRestrictionsFileName(String packageName) { 1659 return RESTRICTIONS_FILE_PREFIX + packageName + XML_SUFFIX; 1660 } 1661 1662 private String restrictionsFileNameToPackage(String fileName) { 1663 return fileName.substring(RESTRICTIONS_FILE_PREFIX.length(), 1664 (int) (fileName.length() - XML_SUFFIX.length())); 1665 } 1666 1667 @Override 1668 protected void dump(FileDescriptor fd, PrintWriter pw, String[] args) { 1669 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP) 1670 != PackageManager.PERMISSION_GRANTED) { 1671 pw.println("Permission Denial: can't dump UserManager from from pid=" 1672 + Binder.getCallingPid() 1673 + ", uid=" + Binder.getCallingUid() 1674 + " without permission " 1675 + android.Manifest.permission.DUMP); 1676 return; 1677 } 1678 1679 long now = System.currentTimeMillis(); 1680 StringBuilder sb = new StringBuilder(); 1681 synchronized (mPackagesLock) { 1682 pw.println("Users:"); 1683 for (int i = 0; i < mUsers.size(); i++) { 1684 UserInfo user = mUsers.valueAt(i); 1685 if (user == null) continue; 1686 pw.print(" "); pw.print(user); pw.print(" serialNo="); pw.print(user.serialNumber); 1687 if (mRemovingUserIds.get(mUsers.keyAt(i))) pw.print(" <removing> "); 1688 if (user.partial) pw.print(" <partial>"); 1689 pw.println(); 1690 pw.print(" Created: "); 1691 if (user.creationTime == 0) { 1692 pw.println("<unknown>"); 1693 } else { 1694 sb.setLength(0); 1695 TimeUtils.formatDuration(now - user.creationTime, sb); 1696 sb.append(" ago"); 1697 pw.println(sb); 1698 } 1699 pw.print(" Last logged in: "); 1700 if (user.lastLoggedInTime == 0) { 1701 pw.println("<unknown>"); 1702 } else { 1703 sb.setLength(0); 1704 TimeUtils.formatDuration(now - user.lastLoggedInTime, sb); 1705 sb.append(" ago"); 1706 pw.println(sb); 1707 } 1708 } 1709 } 1710 } 1711 1712 private PackageMonitor mUserPackageMonitor = new PackageMonitor() { 1713 @Override 1714 public void onPackageRemoved(String pkg, int uid) { 1715 final int userId = this.getChangingUserId(); 1716 // Package could be disappearing because it is being blocked, so also check if 1717 // it has been uninstalled. 1718 final boolean uninstalled = isPackageDisappearing(pkg) == PACKAGE_PERMANENT_CHANGE; 1719 if (uninstalled && userId >= 0 && !isPackageInstalled(pkg, userId)) { 1720 cleanAppRestrictionsForPackage(pkg, userId); 1721 } 1722 } 1723 }; 1724} 1725