PackageInstallerService.java revision 941a8ba1a6043cf84a7bf622e44a0b4f7abd0178
1/* 2 * Copyright (C) 2014 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.content.pm.PackageManager.INSTALL_ALL_USERS; 20import static android.content.pm.PackageManager.INSTALL_FROM_ADB; 21import static android.content.pm.PackageManager.INSTALL_REPLACE_EXISTING; 22import static com.android.internal.util.XmlUtils.readBitmapAttribute; 23import static com.android.internal.util.XmlUtils.readBooleanAttribute; 24import static com.android.internal.util.XmlUtils.readIntAttribute; 25import static com.android.internal.util.XmlUtils.readLongAttribute; 26import static com.android.internal.util.XmlUtils.readStringAttribute; 27import static com.android.internal.util.XmlUtils.readUriAttribute; 28import static com.android.internal.util.XmlUtils.writeBitmapAttribute; 29import static com.android.internal.util.XmlUtils.writeBooleanAttribute; 30import static com.android.internal.util.XmlUtils.writeIntAttribute; 31import static com.android.internal.util.XmlUtils.writeLongAttribute; 32import static com.android.internal.util.XmlUtils.writeStringAttribute; 33import static com.android.internal.util.XmlUtils.writeUriAttribute; 34import static org.xmlpull.v1.XmlPullParser.END_DOCUMENT; 35import static org.xmlpull.v1.XmlPullParser.START_TAG; 36 37import android.app.ActivityManager; 38import android.app.AppOpsManager; 39import android.app.PackageDeleteObserver; 40import android.app.PackageInstallObserver; 41import android.content.Context; 42import android.content.Intent; 43import android.content.IntentSender; 44import android.content.IntentSender.SendIntentException; 45import android.content.pm.ApplicationInfo; 46import android.content.pm.IPackageInstaller; 47import android.content.pm.IPackageInstallerCallback; 48import android.content.pm.IPackageInstallerSession; 49import android.content.pm.PackageInstaller; 50import android.content.pm.PackageParser; 51import android.content.pm.PackageInstaller.SessionInfo; 52import android.content.pm.PackageInstaller.SessionParams; 53import android.content.pm.PackageParser.PackageLite; 54import android.content.pm.PackageParser.PackageParserException; 55import android.content.pm.PackageManager; 56import android.graphics.Bitmap; 57import android.net.Uri; 58import android.os.Binder; 59import android.os.Bundle; 60import android.os.Environment; 61import android.os.Environment.UserEnvironment; 62import android.os.FileUtils; 63import android.os.Handler; 64import android.os.HandlerThread; 65import android.os.Looper; 66import android.os.Message; 67import android.os.Process; 68import android.os.RemoteCallbackList; 69import android.os.RemoteException; 70import android.os.SELinux; 71import android.os.UserHandle; 72import android.os.UserManager; 73import android.os.storage.StorageManager; 74import android.system.ErrnoException; 75import android.system.Os; 76import android.text.TextUtils; 77import android.text.format.DateUtils; 78import android.util.ArraySet; 79import android.util.AtomicFile; 80import android.util.ExceptionUtils; 81import android.util.Log; 82import android.util.Slog; 83import android.util.SparseArray; 84import android.util.SparseBooleanArray; 85import android.util.Xml; 86 87import com.android.internal.annotations.GuardedBy; 88import com.android.internal.content.PackageHelper; 89import com.android.internal.util.FastXmlSerializer; 90import com.android.internal.util.IndentingPrintWriter; 91import com.android.server.IoThread; 92import com.google.android.collect.Sets; 93 94import libcore.io.IoUtils; 95 96import org.xmlpull.v1.XmlPullParser; 97import org.xmlpull.v1.XmlPullParserException; 98import org.xmlpull.v1.XmlSerializer; 99 100import java.io.File; 101import java.io.FileInputStream; 102import java.io.FileNotFoundException; 103import java.io.FileOutputStream; 104import java.io.FilenameFilter; 105import java.io.IOException; 106import java.security.SecureRandom; 107import java.util.ArrayList; 108import java.util.List; 109import java.util.Objects; 110import java.util.Random; 111 112public class PackageInstallerService extends IPackageInstaller.Stub { 113 private static final String TAG = "PackageInstaller"; 114 private static final boolean LOGD = true; 115 116 // TODO: remove outstanding sessions when installer package goes away 117 // TODO: notify listeners in other users when package has been installed there 118 // TODO: purge expired sessions periodically in addition to at reboot 119 120 /** XML constants used in {@link #mSessionsFile} */ 121 private static final String TAG_SESSIONS = "sessions"; 122 private static final String TAG_SESSION = "session"; 123 private static final String ATTR_SESSION_ID = "sessionId"; 124 private static final String ATTR_USER_ID = "userId"; 125 private static final String ATTR_INSTALLER_PACKAGE_NAME = "installerPackageName"; 126 private static final String ATTR_CREATED_MILLIS = "createdMillis"; 127 private static final String ATTR_SESSION_STAGE_DIR = "sessionStageDir"; 128 private static final String ATTR_SESSION_STAGE_CID = "sessionStageCid"; 129 private static final String ATTR_SEALED = "sealed"; 130 private static final String ATTR_MODE = "mode"; 131 private static final String ATTR_INSTALL_FLAGS = "installFlags"; 132 private static final String ATTR_INSTALL_LOCATION = "installLocation"; 133 private static final String ATTR_SIZE_BYTES = "sizeBytes"; 134 private static final String ATTR_APP_PACKAGE_NAME = "appPackageName"; 135 private static final String ATTR_APP_ICON = "appIcon"; 136 private static final String ATTR_APP_LABEL = "appLabel"; 137 private static final String ATTR_ORIGINATING_URI = "originatingUri"; 138 private static final String ATTR_REFERRER_URI = "referrerUri"; 139 private static final String ATTR_ABI_OVERRIDE = "abiOverride"; 140 141 /** Automatically destroy sessions older than this */ 142 private static final long MAX_AGE_MILLIS = 3 * DateUtils.DAY_IN_MILLIS; 143 /** Upper bound on number of active sessions for a UID */ 144 private static final long MAX_ACTIVE_SESSIONS = 1024; 145 /** Upper bound on number of historical sessions for a UID */ 146 private static final long MAX_HISTORICAL_SESSIONS = 1048576; 147 148 private final Context mContext; 149 private final PackageManagerService mPm; 150 private final AppOpsManager mAppOps; 151 private final StorageManager mStorage; 152 153 private final File mStagingDir; 154 private final HandlerThread mInstallThread; 155 156 private final Callbacks mCallbacks; 157 158 /** 159 * File storing persisted {@link #mSessions}. 160 */ 161 private final AtomicFile mSessionsFile; 162 163 private final InternalCallback mInternalCallback = new InternalCallback(); 164 165 /** 166 * Used for generating session IDs. Since this is created at boot time, 167 * normal random might be predictable. 168 */ 169 private final Random mRandom = new SecureRandom(); 170 171 @GuardedBy("mSessions") 172 private final SparseArray<PackageInstallerSession> mSessions = new SparseArray<>(); 173 174 /** Historical sessions kept around for debugging purposes */ 175 @GuardedBy("mSessions") 176 private final SparseArray<PackageInstallerSession> mHistoricalSessions = new SparseArray<>(); 177 178 /** Sessions allocated to legacy users */ 179 @GuardedBy("mSessions") 180 private final SparseBooleanArray mLegacySessions = new SparseBooleanArray(); 181 182 private static final FilenameFilter sStageFilter = new FilenameFilter() { 183 @Override 184 public boolean accept(File dir, String name) { 185 return isStageName(name); 186 } 187 }; 188 189 public PackageInstallerService(Context context, PackageManagerService pm, File stagingDir) { 190 mContext = context; 191 mPm = pm; 192 mAppOps = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE); 193 mStorage = StorageManager.from(mContext); 194 195 mStagingDir = stagingDir; 196 197 mInstallThread = new HandlerThread(TAG); 198 mInstallThread.start(); 199 200 mCallbacks = new Callbacks(mInstallThread.getLooper()); 201 202 mSessionsFile = new AtomicFile( 203 new File(Environment.getSystemSecureDirectory(), "install_sessions.xml")); 204 205 synchronized (mSessions) { 206 readSessionsLocked(); 207 208 final ArraySet<File> unclaimed = Sets.newArraySet(mStagingDir.listFiles(sStageFilter)); 209 210 // Ignore stages claimed by active sessions 211 for (int i = 0; i < mSessions.size(); i++) { 212 final PackageInstallerSession session = mSessions.valueAt(i); 213 unclaimed.remove(session.stageDir); 214 } 215 216 // Clean up orphaned staging directories 217 for (File stage : unclaimed) { 218 Slog.w(TAG, "Deleting orphan stage " + stage); 219 if (stage.isDirectory()) { 220 FileUtils.deleteContents(stage); 221 } 222 stage.delete(); 223 } 224 } 225 } 226 227 public void onSecureContainersAvailable() { 228 synchronized (mSessions) { 229 final ArraySet<String> unclaimed = new ArraySet<>(); 230 for (String cid : PackageHelper.getSecureContainerList()) { 231 if (isStageName(cid)) { 232 unclaimed.add(cid); 233 } 234 } 235 236 // Ignore stages claimed by active sessions 237 for (int i = 0; i < mSessions.size(); i++) { 238 final PackageInstallerSession session = mSessions.valueAt(i); 239 final String cid = session.stageCid; 240 241 if (unclaimed.remove(cid)) { 242 // Claimed by active session, mount it 243 PackageHelper.mountSdDir(cid, PackageManagerService.getEncryptKey(), 244 Process.SYSTEM_UID); 245 } 246 } 247 248 // Clean up orphaned staging containers 249 for (String cid : unclaimed) { 250 Slog.w(TAG, "Deleting orphan container " + cid); 251 PackageHelper.destroySdDir(cid); 252 } 253 } 254 } 255 256 public static boolean isStageName(String name) { 257 final boolean isFile = name.startsWith("vmdl") && name.endsWith(".tmp"); 258 final boolean isContainer = name.startsWith("smdl") && name.endsWith(".tmp"); 259 final boolean isLegacyContainer = name.startsWith("smdl2tmp"); 260 return isFile || isContainer || isLegacyContainer; 261 } 262 263 @Deprecated 264 public File allocateInternalStageDirLegacy() throws IOException { 265 synchronized (mSessions) { 266 try { 267 final int sessionId = allocateSessionIdLocked(); 268 mLegacySessions.put(sessionId, true); 269 return prepareInternalStageDir(sessionId); 270 } catch (IllegalStateException e) { 271 throw new IOException(e); 272 } 273 } 274 } 275 276 @Deprecated 277 public String allocateExternalStageCidLegacy() { 278 synchronized (mSessions) { 279 final int sessionId = allocateSessionIdLocked(); 280 mLegacySessions.put(sessionId, true); 281 return "smdl" + sessionId + ".tmp"; 282 } 283 } 284 285 private void readSessionsLocked() { 286 if (LOGD) Slog.v(TAG, "readSessionsLocked()"); 287 288 mSessions.clear(); 289 290 FileInputStream fis = null; 291 try { 292 fis = mSessionsFile.openRead(); 293 final XmlPullParser in = Xml.newPullParser(); 294 in.setInput(fis, null); 295 296 int type; 297 while ((type = in.next()) != END_DOCUMENT) { 298 if (type == START_TAG) { 299 final String tag = in.getName(); 300 if (TAG_SESSION.equals(tag)) { 301 final PackageInstallerSession session = readSessionLocked(in); 302 final long age = System.currentTimeMillis() - session.createdMillis; 303 304 final boolean valid; 305 if (age >= MAX_AGE_MILLIS) { 306 Slog.w(TAG, "Abandoning old session first created at " 307 + session.createdMillis); 308 valid = false; 309 } else if (session.stageDir != null 310 && !session.stageDir.exists()) { 311 Slog.w(TAG, "Abandoning internal session with missing stage " 312 + session.stageDir); 313 valid = false; 314 } else { 315 valid = true; 316 } 317 318 if (valid) { 319 mSessions.put(session.sessionId, session); 320 } else { 321 // Since this is early during boot we don't send 322 // any observer events about the session, but we 323 // keep details around for dumpsys. 324 mHistoricalSessions.put(session.sessionId, session); 325 } 326 } 327 } 328 } 329 } catch (FileNotFoundException e) { 330 // Missing sessions are okay, probably first boot 331 } catch (IOException e) { 332 Log.wtf(TAG, "Failed reading install sessions", e); 333 } catch (XmlPullParserException e) { 334 Log.wtf(TAG, "Failed reading install sessions", e); 335 } finally { 336 IoUtils.closeQuietly(fis); 337 } 338 } 339 340 private PackageInstallerSession readSessionLocked(XmlPullParser in) throws IOException { 341 final int sessionId = readIntAttribute(in, ATTR_SESSION_ID); 342 final int userId = readIntAttribute(in, ATTR_USER_ID); 343 final String installerPackageName = readStringAttribute(in, ATTR_INSTALLER_PACKAGE_NAME); 344 final long createdMillis = readLongAttribute(in, ATTR_CREATED_MILLIS); 345 final String stageDirRaw = readStringAttribute(in, ATTR_SESSION_STAGE_DIR); 346 final File stageDir = (stageDirRaw != null) ? new File(stageDirRaw) : null; 347 final String stageCid = readStringAttribute(in, ATTR_SESSION_STAGE_CID); 348 final boolean sealed = readBooleanAttribute(in, ATTR_SEALED); 349 350 final SessionParams params = new SessionParams( 351 SessionParams.MODE_INVALID); 352 params.mode = readIntAttribute(in, ATTR_MODE); 353 params.installFlags = readIntAttribute(in, ATTR_INSTALL_FLAGS); 354 params.installLocation = readIntAttribute(in, ATTR_INSTALL_LOCATION); 355 params.sizeBytes = readLongAttribute(in, ATTR_SIZE_BYTES); 356 params.appPackageName = readStringAttribute(in, ATTR_APP_PACKAGE_NAME); 357 params.appIcon = readBitmapAttribute(in, ATTR_APP_ICON); 358 params.appLabel = readStringAttribute(in, ATTR_APP_LABEL); 359 params.originatingUri = readUriAttribute(in, ATTR_ORIGINATING_URI); 360 params.referrerUri = readUriAttribute(in, ATTR_REFERRER_URI); 361 params.abiOverride = readStringAttribute(in, ATTR_ABI_OVERRIDE); 362 363 return new PackageInstallerSession(mInternalCallback, mContext, mPm, 364 mInstallThread.getLooper(), sessionId, userId, installerPackageName, params, 365 createdMillis, stageDir, stageCid, sealed); 366 } 367 368 private void writeSessionsLocked() { 369 if (LOGD) Slog.v(TAG, "writeSessionsLocked()"); 370 371 FileOutputStream fos = null; 372 try { 373 fos = mSessionsFile.startWrite(); 374 375 XmlSerializer out = new FastXmlSerializer(); 376 out.setOutput(fos, "utf-8"); 377 out.startDocument(null, true); 378 out.startTag(null, TAG_SESSIONS); 379 final int size = mSessions.size(); 380 for (int i = 0; i < size; i++) { 381 final PackageInstallerSession session = mSessions.valueAt(i); 382 writeSessionLocked(out, session); 383 } 384 out.endTag(null, TAG_SESSIONS); 385 out.endDocument(); 386 387 mSessionsFile.finishWrite(fos); 388 } catch (IOException e) { 389 if (fos != null) { 390 mSessionsFile.failWrite(fos); 391 } 392 } 393 } 394 395 private void writeSessionLocked(XmlSerializer out, PackageInstallerSession session) 396 throws IOException { 397 final SessionParams params = session.params; 398 399 out.startTag(null, TAG_SESSION); 400 401 writeIntAttribute(out, ATTR_SESSION_ID, session.sessionId); 402 writeIntAttribute(out, ATTR_USER_ID, session.userId); 403 writeStringAttribute(out, ATTR_INSTALLER_PACKAGE_NAME, 404 session.installerPackageName); 405 writeLongAttribute(out, ATTR_CREATED_MILLIS, session.createdMillis); 406 if (session.stageDir != null) { 407 writeStringAttribute(out, ATTR_SESSION_STAGE_DIR, 408 session.stageDir.getAbsolutePath()); 409 } 410 if (session.stageCid != null) { 411 writeStringAttribute(out, ATTR_SESSION_STAGE_CID, session.stageCid); 412 } 413 writeBooleanAttribute(out, ATTR_SEALED, session.isSealed()); 414 415 writeIntAttribute(out, ATTR_MODE, params.mode); 416 writeIntAttribute(out, ATTR_INSTALL_FLAGS, params.installFlags); 417 writeIntAttribute(out, ATTR_INSTALL_LOCATION, params.installLocation); 418 writeLongAttribute(out, ATTR_SIZE_BYTES, params.sizeBytes); 419 writeStringAttribute(out, ATTR_APP_PACKAGE_NAME, params.appPackageName); 420 writeBitmapAttribute(out, ATTR_APP_ICON, params.appIcon); 421 writeStringAttribute(out, ATTR_APP_LABEL, params.appLabel); 422 writeUriAttribute(out, ATTR_ORIGINATING_URI, params.originatingUri); 423 writeUriAttribute(out, ATTR_REFERRER_URI, params.referrerUri); 424 writeStringAttribute(out, ATTR_ABI_OVERRIDE, params.abiOverride); 425 426 out.endTag(null, TAG_SESSION); 427 } 428 429 private void writeSessionsAsync() { 430 IoThread.getHandler().post(new Runnable() { 431 @Override 432 public void run() { 433 synchronized (mSessions) { 434 writeSessionsLocked(); 435 } 436 } 437 }); 438 } 439 440 @Override 441 public int createSession(SessionParams params, String installerPackageName, int userId) { 442 try { 443 return createSessionInternal(params, installerPackageName, userId); 444 } catch (IOException e) { 445 throw ExceptionUtils.wrap(e); 446 } 447 } 448 449 private int createSessionInternal(SessionParams params, String installerPackageName, int userId) 450 throws IOException { 451 final int callingUid = Binder.getCallingUid(); 452 mPm.enforceCrossUserPermission(callingUid, userId, true, "createSession"); 453 454 if (mPm.isUserRestricted(UserHandle.getUserId(callingUid), 455 UserManager.DISALLOW_INSTALL_APPS)) { 456 throw new SecurityException("User restriction prevents installing"); 457 } 458 459 if ((callingUid == Process.SHELL_UID) || (callingUid == Process.ROOT_UID)) { 460 installerPackageName = "com.android.shell"; 461 462 params.installFlags |= INSTALL_FROM_ADB; 463 464 } else { 465 mAppOps.checkPackage(callingUid, installerPackageName); 466 467 params.installFlags &= ~INSTALL_FROM_ADB; 468 params.installFlags &= ~INSTALL_ALL_USERS; 469 params.installFlags |= INSTALL_REPLACE_EXISTING; 470 } 471 472 // Defensively resize giant app icons 473 if (params.appIcon != null) { 474 final ActivityManager am = (ActivityManager) mContext.getSystemService( 475 Context.ACTIVITY_SERVICE); 476 final int iconSize = am.getLauncherLargeIconSize(); 477 if ((params.appIcon.getWidth() > iconSize * 2) 478 || (params.appIcon.getHeight() > iconSize * 2)) { 479 params.appIcon = Bitmap.createScaledBitmap(params.appIcon, iconSize, iconSize, 480 true); 481 } 482 } 483 484 // TODO: treat INHERIT_EXISTING as install for user 485 486 // Figure out where we're going to be staging session data 487 final boolean stageInternal; 488 489 if (params.mode == SessionParams.MODE_FULL_INSTALL) { 490 // Brand new install, use best resolved location. This also verifies 491 // that target has enough free space for the install. 492 final long ident = Binder.clearCallingIdentity(); 493 try { 494 final int resolved = PackageHelper.resolveInstallLocation(mContext, 495 params.appPackageName, params.installLocation, params.sizeBytes, 496 params.installFlags); 497 498 if (resolved == PackageHelper.RECOMMEND_INSTALL_INTERNAL) { 499 stageInternal = true; 500 } else if (resolved == PackageHelper.RECOMMEND_INSTALL_EXTERNAL) { 501 stageInternal = false; 502 } else { 503 throw new IOException("No storage with enough free space; res=" + resolved); 504 } 505 } finally { 506 Binder.restoreCallingIdentity(ident); 507 } 508 } else if (params.mode == SessionParams.MODE_INHERIT_EXISTING) { 509 // Inheriting existing install, so stay on the same storage medium. 510 final ApplicationInfo existingApp = mPm.getApplicationInfo(params.appPackageName, 0, 511 userId); 512 if (existingApp == null) { 513 throw new IllegalStateException( 514 "Missing existing app " + params.appPackageName); 515 } 516 517 final long existingSize; 518 try { 519 final PackageLite existingPkg = PackageParser.parsePackageLite( 520 new File(existingApp.getCodePath()), 0); 521 existingSize = PackageHelper.calculateInstalledSize(existingPkg, false, 522 params.abiOverride); 523 } catch (PackageParserException e) { 524 throw new IllegalStateException( 525 "Failed to calculate size of " + params.appPackageName); 526 } 527 528 if ((existingApp.flags & ApplicationInfo.FLAG_EXTERNAL_STORAGE) == 0) { 529 // Internal we can link existing install into place, so we only 530 // need enough space for the new data. 531 checkInternalStorage(params.sizeBytes); 532 stageInternal = true; 533 } else { 534 // External we're going to copy existing install into our 535 // container, so we need footprint of both. 536 checkExternalStorage(params.sizeBytes + existingSize); 537 stageInternal = false; 538 } 539 } else { 540 throw new IllegalArgumentException("Invalid install mode: " + params.mode); 541 } 542 543 final int sessionId; 544 final PackageInstallerSession session; 545 synchronized (mSessions) { 546 // Sanity check that installer isn't going crazy 547 final int activeCount = getSessionCount(mSessions, callingUid); 548 if (activeCount >= MAX_ACTIVE_SESSIONS) { 549 throw new IllegalStateException( 550 "Too many active sessions for UID " + callingUid); 551 } 552 final int historicalCount = getSessionCount(mHistoricalSessions, callingUid); 553 if (historicalCount >= MAX_HISTORICAL_SESSIONS) { 554 throw new IllegalStateException( 555 "Too many historical sessions for UID " + callingUid); 556 } 557 558 final long createdMillis = System.currentTimeMillis(); 559 sessionId = allocateSessionIdLocked(); 560 561 // We're staging to exactly one location 562 File stageDir = null; 563 String stageCid = null; 564 if (stageInternal) { 565 stageDir = prepareInternalStageDir(sessionId); 566 } else { 567 stageCid = prepareExternalStageCid(sessionId, params.sizeBytes); 568 } 569 570 session = new PackageInstallerSession(mInternalCallback, mContext, mPm, 571 mInstallThread.getLooper(), sessionId, userId, installerPackageName, params, 572 createdMillis, stageDir, stageCid, false); 573 mSessions.put(sessionId, session); 574 } 575 576 mCallbacks.notifySessionCreated(session.sessionId, session.userId); 577 writeSessionsAsync(); 578 return sessionId; 579 } 580 581 private void checkInternalStorage(long sizeBytes) throws IOException { 582 if (sizeBytes <= 0) return; 583 584 final File target = Environment.getDataDirectory(); 585 final long targetBytes = sizeBytes + mStorage.getStorageLowBytes(target); 586 587 mPm.freeStorage(targetBytes); 588 if (target.getUsableSpace() < targetBytes) { 589 throw new IOException("Not enough internal space to write " + sizeBytes + " bytes"); 590 } 591 } 592 593 private void checkExternalStorage(long sizeBytes) throws IOException { 594 if (sizeBytes <= 0) return; 595 596 final File target = new UserEnvironment(UserHandle.USER_OWNER) 597 .getExternalStorageDirectory(); 598 final long targetBytes = sizeBytes + mStorage.getStorageLowBytes(target); 599 600 if (target.getUsableSpace() < targetBytes) { 601 throw new IOException("Not enough external space to write " + sizeBytes + " bytes"); 602 } 603 } 604 605 @Override 606 public IPackageInstallerSession openSession(int sessionId) { 607 synchronized (mSessions) { 608 final PackageInstallerSession session = mSessions.get(sessionId); 609 if (session == null) { 610 throw new IllegalStateException("Missing session " + sessionId); 611 } 612 if (!isCallingUidOwner(session)) { 613 throw new SecurityException("Caller has no access to session " + sessionId); 614 } 615 session.open(); 616 return session; 617 } 618 } 619 620 private int allocateSessionIdLocked() { 621 int n = 0; 622 int sessionId; 623 do { 624 sessionId = mRandom.nextInt(Integer.MAX_VALUE - 1) + 1; 625 if (mSessions.get(sessionId) == null && mHistoricalSessions.get(sessionId) == null 626 && !mLegacySessions.get(sessionId, false)) { 627 return sessionId; 628 } 629 } while (n++ < 32); 630 631 throw new IllegalStateException("Failed to allocate session ID"); 632 } 633 634 private File prepareInternalStageDir(int sessionId) throws IOException { 635 final File file = new File(mStagingDir, "vmdl" + sessionId + ".tmp"); 636 637 if (file.exists()) { 638 throw new IOException("Session dir already exists: " + file); 639 } 640 641 try { 642 Os.mkdir(file.getAbsolutePath(), 0755); 643 Os.chmod(file.getAbsolutePath(), 0755); 644 } catch (ErrnoException e) { 645 // This purposefully throws if directory already exists 646 throw new IOException("Failed to prepare session dir", e); 647 } 648 649 if (!SELinux.restorecon(file)) { 650 throw new IOException("Failed to restorecon session dir"); 651 } 652 653 return file; 654 } 655 656 private String prepareExternalStageCid(int sessionId, long sizeBytes) throws IOException { 657 if (sizeBytes <= 0) { 658 throw new IOException("Session must provide valid size for ASEC"); 659 } 660 661 final String cid = "smdl" + sessionId + ".tmp"; 662 if (PackageHelper.createSdDir(sizeBytes, cid, PackageManagerService.getEncryptKey(), 663 Process.SYSTEM_UID, true) == null) { 664 throw new IOException("Failed to create ASEC"); 665 } 666 667 return cid; 668 } 669 670 @Override 671 public SessionInfo getSessionInfo(int sessionId) { 672 synchronized (mSessions) { 673 final PackageInstallerSession session = mSessions.get(sessionId); 674 if (!isCallingUidOwner(session)) { 675 enforceCallerCanReadSessions(); 676 } 677 return session != null ? session.generateInfo() : null; 678 } 679 } 680 681 @Override 682 public List<SessionInfo> getAllSessions(int userId) { 683 mPm.enforceCrossUserPermission(Binder.getCallingUid(), userId, true, "getAllSessions"); 684 enforceCallerCanReadSessions(); 685 686 final List<SessionInfo> result = new ArrayList<>(); 687 synchronized (mSessions) { 688 for (int i = 0; i < mSessions.size(); i++) { 689 final PackageInstallerSession session = mSessions.valueAt(i); 690 if (session.userId == userId) { 691 result.add(session.generateInfo()); 692 } 693 } 694 } 695 return result; 696 } 697 698 @Override 699 public List<SessionInfo> getMySessions(String installerPackageName, int userId) { 700 mPm.enforceCrossUserPermission(Binder.getCallingUid(), userId, true, "getMySessions"); 701 mAppOps.checkPackage(Binder.getCallingUid(), installerPackageName); 702 703 final List<SessionInfo> result = new ArrayList<>(); 704 synchronized (mSessions) { 705 for (int i = 0; i < mSessions.size(); i++) { 706 final PackageInstallerSession session = mSessions.valueAt(i); 707 if (Objects.equals(session.installerPackageName, installerPackageName) 708 && session.userId == userId) { 709 result.add(session.generateInfo()); 710 } 711 } 712 } 713 return result; 714 } 715 716 @Override 717 public void uninstall(String packageName, int flags, IntentSender statusReceiver, int userId) { 718 mPm.enforceCrossUserPermission(Binder.getCallingUid(), userId, true, "uninstall"); 719 720 final PackageDeleteObserverAdapter adapter = new PackageDeleteObserverAdapter(mContext, 721 statusReceiver, packageName); 722 if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DELETE_PACKAGES) 723 == PackageManager.PERMISSION_GRANTED) { 724 // Sweet, call straight through! 725 mPm.deletePackage(packageName, adapter.getBinder(), userId, flags); 726 727 } else { 728 // Take a short detour to confirm with user 729 final Intent intent = new Intent(Intent.ACTION_UNINSTALL_PACKAGE); 730 intent.setData(Uri.fromParts("package", packageName, null)); 731 intent.putExtra(PackageInstaller.EXTRA_CALLBACK, adapter.getBinder().asBinder()); 732 adapter.onUserActionRequired(intent); 733 } 734 } 735 736 @Override 737 public void setPermissionsResult(int sessionId, boolean accepted) { 738 mContext.enforceCallingOrSelfPermission(android.Manifest.permission.INSTALL_PACKAGES, TAG); 739 740 synchronized (mSessions) { 741 mSessions.get(sessionId).setPermissionsResult(accepted); 742 } 743 } 744 745 @Override 746 public void registerCallback(IPackageInstallerCallback callback, int userId) { 747 mPm.enforceCrossUserPermission(Binder.getCallingUid(), userId, true, "registerCallback"); 748 enforceCallerCanReadSessions(); 749 750 mCallbacks.register(callback, userId); 751 } 752 753 @Override 754 public void unregisterCallback(IPackageInstallerCallback callback) { 755 mCallbacks.unregister(callback); 756 } 757 758 private static int getSessionCount(SparseArray<PackageInstallerSession> sessions, 759 int installerUid) { 760 int count = 0; 761 final int size = sessions.size(); 762 for (int i = 0; i < size; i++) { 763 final PackageInstallerSession session = sessions.valueAt(i); 764 if (session.installerUid == installerUid) { 765 count++; 766 } 767 } 768 return count; 769 } 770 771 private boolean isCallingUidOwner(PackageInstallerSession session) { 772 final int callingUid = Binder.getCallingUid(); 773 if (callingUid == Process.ROOT_UID) { 774 return true; 775 } else { 776 return (session != null) && (callingUid == session.installerUid); 777 } 778 } 779 780 /** 781 * We allow those with permission, or the current home app. 782 */ 783 private void enforceCallerCanReadSessions() { 784 final boolean hasPermission = (mContext.checkCallingOrSelfPermission( 785 android.Manifest.permission.READ_INSTALL_SESSIONS) 786 == PackageManager.PERMISSION_GRANTED); 787 final boolean isHomeApp = mPm.checkCallerIsHomeApp(); 788 if (hasPermission || isHomeApp) { 789 return; 790 } else { 791 throw new SecurityException("Caller must be current home app to read install sessions"); 792 } 793 } 794 795 static class PackageDeleteObserverAdapter extends PackageDeleteObserver { 796 private final Context mContext; 797 private final IntentSender mTarget; 798 private final String mPackageName; 799 800 public PackageDeleteObserverAdapter(Context context, IntentSender target, 801 String packageName) { 802 mContext = context; 803 mTarget = target; 804 mPackageName = packageName; 805 } 806 807 @Override 808 public void onUserActionRequired(Intent intent) { 809 final Intent fillIn = new Intent(); 810 fillIn.putExtra(PackageInstaller.EXTRA_PACKAGE_NAME, mPackageName); 811 fillIn.putExtra(PackageInstaller.EXTRA_STATUS, 812 PackageInstaller.STATUS_PENDING_USER_ACTION); 813 fillIn.putExtra(Intent.EXTRA_INTENT, intent); 814 try { 815 mTarget.sendIntent(mContext, 0, fillIn, null, null); 816 } catch (SendIntentException ignored) { 817 } 818 } 819 820 @Override 821 public void onPackageDeleted(String basePackageName, int returnCode, String msg) { 822 final Intent fillIn = new Intent(); 823 fillIn.putExtra(PackageInstaller.EXTRA_PACKAGE_NAME, mPackageName); 824 fillIn.putExtra(PackageInstaller.EXTRA_STATUS, 825 PackageManager.deleteStatusToPublicStatus(returnCode)); 826 fillIn.putExtra(PackageInstaller.EXTRA_STATUS_MESSAGE, 827 PackageManager.deleteStatusToString(returnCode, msg)); 828 fillIn.putExtra(PackageInstaller.EXTRA_LEGACY_STATUS, returnCode); 829 try { 830 mTarget.sendIntent(mContext, 0, fillIn, null, null); 831 } catch (SendIntentException ignored) { 832 } 833 } 834 } 835 836 static class PackageInstallObserverAdapter extends PackageInstallObserver { 837 private final Context mContext; 838 private final IntentSender mTarget; 839 private final int mSessionId; 840 841 public PackageInstallObserverAdapter(Context context, IntentSender target, int sessionId) { 842 mContext = context; 843 mTarget = target; 844 mSessionId = sessionId; 845 } 846 847 @Override 848 public void onUserActionRequired(Intent intent) { 849 final Intent fillIn = new Intent(); 850 fillIn.putExtra(PackageInstaller.EXTRA_SESSION_ID, mSessionId); 851 fillIn.putExtra(PackageInstaller.EXTRA_STATUS, 852 PackageInstaller.STATUS_PENDING_USER_ACTION); 853 fillIn.putExtra(Intent.EXTRA_INTENT, intent); 854 try { 855 mTarget.sendIntent(mContext, 0, fillIn, null, null); 856 } catch (SendIntentException ignored) { 857 } 858 } 859 860 @Override 861 public void onPackageInstalled(String basePackageName, int returnCode, String msg, 862 Bundle extras) { 863 final Intent fillIn = new Intent(); 864 fillIn.putExtra(PackageInstaller.EXTRA_SESSION_ID, mSessionId); 865 fillIn.putExtra(PackageInstaller.EXTRA_STATUS, 866 PackageManager.installStatusToPublicStatus(returnCode)); 867 fillIn.putExtra(PackageInstaller.EXTRA_STATUS_MESSAGE, 868 PackageManager.installStatusToString(returnCode, msg)); 869 fillIn.putExtra(PackageInstaller.EXTRA_LEGACY_STATUS, returnCode); 870 if (extras != null) { 871 final String existing = extras.getString( 872 PackageManager.EXTRA_FAILURE_EXISTING_PACKAGE); 873 if (!TextUtils.isEmpty(existing)) { 874 fillIn.putExtra(PackageInstaller.EXTRA_OTHER_PACKAGE_NAME, existing); 875 } 876 } 877 try { 878 mTarget.sendIntent(mContext, 0, fillIn, null, null); 879 } catch (SendIntentException ignored) { 880 } 881 } 882 } 883 884 private static class Callbacks extends Handler { 885 private static final int MSG_SESSION_CREATED = 1; 886 private static final int MSG_SESSION_OPENED = 2; 887 private static final int MSG_SESSION_PROGRESS_CHANGED = 3; 888 private static final int MSG_SESSION_CLOSED = 4; 889 private static final int MSG_SESSION_FINISHED = 5; 890 891 private final RemoteCallbackList<IPackageInstallerCallback> 892 mCallbacks = new RemoteCallbackList<>(); 893 894 public Callbacks(Looper looper) { 895 super(looper); 896 } 897 898 public void register(IPackageInstallerCallback callback, int userId) { 899 mCallbacks.register(callback, new UserHandle(userId)); 900 } 901 902 public void unregister(IPackageInstallerCallback callback) { 903 mCallbacks.unregister(callback); 904 } 905 906 @Override 907 public void handleMessage(Message msg) { 908 final int userId = msg.arg2; 909 final int n = mCallbacks.beginBroadcast(); 910 for (int i = 0; i < n; i++) { 911 final IPackageInstallerCallback callback = mCallbacks.getBroadcastItem(i); 912 final UserHandle user = (UserHandle) mCallbacks.getBroadcastCookie(i); 913 // TODO: dispatch notifications for slave profiles 914 if (userId == user.getIdentifier()) { 915 try { 916 invokeCallback(callback, msg); 917 } catch (RemoteException ignored) { 918 } 919 } 920 } 921 mCallbacks.finishBroadcast(); 922 } 923 924 private void invokeCallback(IPackageInstallerCallback callback, Message msg) 925 throws RemoteException { 926 final int sessionId = msg.arg1; 927 switch (msg.what) { 928 case MSG_SESSION_CREATED: 929 callback.onSessionCreated(sessionId); 930 break; 931 case MSG_SESSION_OPENED: 932 callback.onSessionOpened(sessionId); 933 break; 934 case MSG_SESSION_PROGRESS_CHANGED: 935 callback.onSessionProgressChanged(sessionId, (float) msg.obj); 936 break; 937 case MSG_SESSION_CLOSED: 938 callback.onSessionClosed(sessionId); 939 break; 940 case MSG_SESSION_FINISHED: 941 callback.onSessionFinished(sessionId, (boolean) msg.obj); 942 break; 943 } 944 } 945 946 private void notifySessionCreated(int sessionId, int userId) { 947 obtainMessage(MSG_SESSION_CREATED, sessionId, userId).sendToTarget(); 948 } 949 950 private void notifySessionOpened(int sessionId, int userId) { 951 obtainMessage(MSG_SESSION_OPENED, sessionId, userId).sendToTarget(); 952 } 953 954 private void notifySessionProgressChanged(int sessionId, int userId, float progress) { 955 obtainMessage(MSG_SESSION_PROGRESS_CHANGED, sessionId, userId, progress).sendToTarget(); 956 } 957 958 private void notifySessionClosed(int sessionId, int userId) { 959 obtainMessage(MSG_SESSION_CLOSED, sessionId, userId).sendToTarget(); 960 } 961 962 public void notifySessionFinished(int sessionId, int userId, boolean success) { 963 obtainMessage(MSG_SESSION_FINISHED, sessionId, userId, success).sendToTarget(); 964 } 965 } 966 967 void dump(IndentingPrintWriter pw) { 968 synchronized (mSessions) { 969 pw.println("Active install sessions:"); 970 pw.increaseIndent(); 971 int N = mSessions.size(); 972 for (int i = 0; i < N; i++) { 973 final PackageInstallerSession session = mSessions.valueAt(i); 974 session.dump(pw); 975 pw.println(); 976 } 977 pw.println(); 978 pw.decreaseIndent(); 979 980 pw.println("Historical install sessions:"); 981 pw.increaseIndent(); 982 N = mHistoricalSessions.size(); 983 for (int i = 0; i < N; i++) { 984 final PackageInstallerSession session = mHistoricalSessions.valueAt(i); 985 session.dump(pw); 986 pw.println(); 987 } 988 pw.println(); 989 pw.decreaseIndent(); 990 991 pw.println("Legacy install sessions:"); 992 pw.increaseIndent(); 993 pw.println(mLegacySessions.toString()); 994 pw.decreaseIndent(); 995 } 996 } 997 998 class InternalCallback { 999 public void onSessionProgressChanged(PackageInstallerSession session, float progress) { 1000 mCallbacks.notifySessionProgressChanged(session.sessionId, session.userId, progress); 1001 } 1002 1003 public void onSessionOpened(PackageInstallerSession session) { 1004 mCallbacks.notifySessionOpened(session.sessionId, session.userId); 1005 } 1006 1007 public void onSessionClosed(PackageInstallerSession session) { 1008 mCallbacks.notifySessionClosed(session.sessionId, session.userId); 1009 } 1010 1011 public void onSessionFinished(PackageInstallerSession session, boolean success) { 1012 mCallbacks.notifySessionFinished(session.sessionId, session.userId, success); 1013 synchronized (mSessions) { 1014 mSessions.remove(session.sessionId); 1015 mHistoricalSessions.put(session.sessionId, session); 1016 } 1017 writeSessionsAsync(); 1018 } 1019 1020 public void onSessionSealed(PackageInstallerSession session) { 1021 // It's very important that we block until we've recorded the 1022 // session as being sealed, since we never want to allow mutation 1023 // after sealing. 1024 writeSessionsLocked(); 1025 } 1026 } 1027} 1028