DefaultContainerService.java revision 6431d11cd420536aaa9d93ae510a3151ccc4df1d
1/* 2 * Copyright (C) 2010 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.defcontainer; 18 19import android.app.IntentService; 20import android.content.Intent; 21import android.content.pm.ContainerEncryptionParams; 22import android.content.pm.IPackageManager; 23import android.content.pm.LimitedLengthInputStream; 24import android.content.pm.MacAuthenticatedInputStream; 25import android.content.pm.PackageCleanItem; 26import android.content.pm.PackageInfo; 27import android.content.pm.PackageInfoLite; 28import android.content.pm.PackageManager; 29import android.content.pm.PackageParser; 30import android.content.res.ObbInfo; 31import android.content.res.ObbScanner; 32import android.net.Uri; 33import android.os.Build; 34import android.os.Environment; 35import android.os.Environment.UserEnvironment; 36import android.os.FileUtils; 37import android.os.IBinder; 38import android.os.ParcelFileDescriptor; 39import android.os.Process; 40import android.os.RemoteException; 41import android.os.ServiceManager; 42import android.os.StatFs; 43import android.provider.Settings; 44import android.system.ErrnoException; 45import android.system.Os; 46import android.system.StructStatVfs; 47import android.util.DisplayMetrics; 48import android.util.Slog; 49 50import com.android.internal.app.IMediaContainerService; 51import com.android.internal.content.NativeLibraryHelper; 52import com.android.internal.content.PackageHelper; 53 54import java.io.BufferedInputStream; 55import java.io.File; 56import java.io.FileInputStream; 57import java.io.FileNotFoundException; 58import java.io.IOException; 59import java.io.InputStream; 60import java.io.OutputStream; 61import java.security.DigestException; 62import java.security.GeneralSecurityException; 63import java.security.InvalidAlgorithmParameterException; 64import java.security.InvalidKeyException; 65import java.security.NoSuchAlgorithmException; 66 67import javax.crypto.Cipher; 68import javax.crypto.CipherInputStream; 69import javax.crypto.Mac; 70import javax.crypto.NoSuchPaddingException; 71 72import libcore.io.IoUtils; 73import libcore.io.Streams; 74 75/* 76 * This service copies a downloaded apk to a file passed in as 77 * a ParcelFileDescriptor or to a newly created container specified 78 * by parameters. The DownloadManager gives access to this process 79 * based on its uid. This process also needs the ACCESS_DOWNLOAD_MANAGER 80 * permission to access apks downloaded via the download manager. 81 */ 82public class DefaultContainerService extends IntentService { 83 private static final String TAG = "DefContainer"; 84 private static final boolean localLOGV = false; 85 86 private static final String LIB_DIR_NAME = "lib"; 87 88 private IMediaContainerService.Stub mBinder = new IMediaContainerService.Stub() { 89 /** 90 * Creates a new container and copies resource there. 91 * @param paackageURI the uri of resource to be copied. Can be either 92 * a content uri or a file uri 93 * @param cid the id of the secure container that should 94 * be used for creating a secure container into which the resource 95 * will be copied. 96 * @param key Refers to key used for encrypting the secure container 97 * @param resFileName Name of the target resource file(relative to newly 98 * created secure container) 99 * @return Returns the new cache path where the resource has been copied into 100 * 101 */ 102 public String copyResourceToContainer(final Uri packageURI, final String cid, 103 final String key, final String resFileName, final String publicResFileName, 104 boolean isExternal, boolean isForwardLocked, String abiOverride) { 105 if (packageURI == null || cid == null) { 106 return null; 107 } 108 109 return copyResourceInner(packageURI, cid, key, resFileName, publicResFileName, 110 isExternal, isForwardLocked, abiOverride); 111 } 112 113 /** 114 * Copy specified resource to output stream 115 * 116 * @param packageURI the uri of resource to be copied. Should be a file 117 * uri 118 * @param encryptionParams parameters describing the encryption used for 119 * this file 120 * @param outStream Remote file descriptor to be used for copying 121 * @return returns status code according to those in 122 * {@link PackageManager} 123 */ 124 public int copyResource(final Uri packageURI, ContainerEncryptionParams encryptionParams, 125 ParcelFileDescriptor outStream) { 126 if (packageURI == null || outStream == null) { 127 return PackageManager.INSTALL_FAILED_INVALID_URI; 128 } 129 130 ParcelFileDescriptor.AutoCloseOutputStream autoOut 131 = new ParcelFileDescriptor.AutoCloseOutputStream(outStream); 132 133 try { 134 copyFile(packageURI, autoOut, encryptionParams); 135 return PackageManager.INSTALL_SUCCEEDED; 136 } catch (FileNotFoundException e) { 137 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " FNF: " 138 + e.getMessage()); 139 return PackageManager.INSTALL_FAILED_INVALID_URI; 140 } catch (IOException e) { 141 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " IO: " 142 + e.getMessage()); 143 return PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE; 144 } catch (DigestException e) { 145 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " Security: " 146 + e.getMessage()); 147 return PackageManager.INSTALL_FAILED_INVALID_APK; 148 } finally { 149 IoUtils.closeQuietly(autoOut); 150 } 151 } 152 153 /** 154 * Determine the recommended install location for package 155 * specified by file uri location. 156 * 157 * @return Returns PackageInfoLite object containing 158 * the package info and recommended app location. 159 */ 160 public PackageInfoLite getMinimalPackageInfo(final String packagePath, int flags, 161 long threshold, String abiOverride) { 162 PackageInfoLite ret = new PackageInfoLite(); 163 164 if (packagePath == null) { 165 Slog.i(TAG, "Invalid package file " + packagePath); 166 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 167 return ret; 168 } 169 170 DisplayMetrics metrics = new DisplayMetrics(); 171 metrics.setToDefaults(); 172 173 PackageParser.PackageLite pkg = PackageParser.parsePackageLite(packagePath, 0); 174 if (pkg == null) { 175 Slog.w(TAG, "Failed to parse package"); 176 177 final File apkFile = new File(packagePath); 178 if (!apkFile.exists()) { 179 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_URI; 180 } else { 181 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 182 } 183 184 return ret; 185 } 186 187 ret.packageName = pkg.packageName; 188 ret.versionCode = pkg.versionCode; 189 ret.installLocation = pkg.installLocation; 190 ret.verifiers = pkg.verifiers; 191 192 ret.recommendedInstallLocation = recommendAppInstallLocation(pkg.installLocation, 193 packagePath, flags, threshold, abiOverride); 194 195 return ret; 196 } 197 198 @Override 199 public boolean checkInternalFreeStorage(Uri packageUri, boolean isForwardLocked, 200 long threshold) throws RemoteException { 201 final File apkFile = new File(packageUri.getPath()); 202 try { 203 return isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 204 } catch (IOException e) { 205 return true; 206 } 207 } 208 209 @Override 210 public boolean checkExternalFreeStorage(Uri packageUri, boolean isForwardLocked, 211 String abiOverride) throws RemoteException { 212 final File apkFile = new File(packageUri.getPath()); 213 try { 214 return isUnderExternalThreshold(apkFile, isForwardLocked, abiOverride); 215 } catch (IOException e) { 216 return true; 217 } 218 } 219 220 public ObbInfo getObbInfo(String filename) { 221 try { 222 return ObbScanner.getObbInfo(filename); 223 } catch (IOException e) { 224 Slog.d(TAG, "Couldn't get OBB info for " + filename); 225 return null; 226 } 227 } 228 229 @Override 230 public long calculateDirectorySize(String path) throws RemoteException { 231 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 232 233 final File dir = Environment.maybeTranslateEmulatedPathToInternal(new File(path)); 234 if (dir.exists() && dir.isDirectory()) { 235 final String targetPath = dir.getAbsolutePath(); 236 return MeasurementUtils.measureDirectory(targetPath); 237 } else { 238 return 0L; 239 } 240 } 241 242 @Override 243 public long[] getFileSystemStats(String path) { 244 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 245 246 try { 247 final StructStatVfs stat = Os.statvfs(path); 248 final long totalSize = stat.f_blocks * stat.f_bsize; 249 final long availSize = stat.f_bavail * stat.f_bsize; 250 return new long[] { totalSize, availSize }; 251 } catch (ErrnoException e) { 252 throw new IllegalStateException(e); 253 } 254 } 255 256 @Override 257 public void clearDirectory(String path) throws RemoteException { 258 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 259 260 final File directory = new File(path); 261 if (directory.exists() && directory.isDirectory()) { 262 eraseFiles(directory); 263 } 264 } 265 266 @Override 267 public long calculateInstalledSize(String packagePath, boolean isForwardLocked, 268 String abiOverride) throws RemoteException { 269 final File packageFile = new File(packagePath); 270 try { 271 return calculateContainerSize(packageFile, isForwardLocked, abiOverride) * 1024 * 1024; 272 } catch (IOException e) { 273 /* 274 * Okay, something failed, so let's just estimate it to be 2x 275 * the file size. Note this will be 0 if the file doesn't exist. 276 */ 277 return packageFile.length() * 2; 278 } 279 } 280 }; 281 282 public DefaultContainerService() { 283 super("DefaultContainerService"); 284 setIntentRedelivery(true); 285 } 286 287 @Override 288 protected void onHandleIntent(Intent intent) { 289 if (PackageManager.ACTION_CLEAN_EXTERNAL_STORAGE.equals(intent.getAction())) { 290 final IPackageManager pm = IPackageManager.Stub.asInterface( 291 ServiceManager.getService("package")); 292 PackageCleanItem item = null; 293 try { 294 while ((item = pm.nextPackageToClean(item)) != null) { 295 final UserEnvironment userEnv = new UserEnvironment(item.userId); 296 eraseFiles(userEnv.buildExternalStorageAppDataDirs(item.packageName)); 297 eraseFiles(userEnv.buildExternalStorageAppMediaDirs(item.packageName)); 298 if (item.andCode) { 299 eraseFiles(userEnv.buildExternalStorageAppObbDirs(item.packageName)); 300 } 301 } 302 } catch (RemoteException e) { 303 } 304 } 305 } 306 307 void eraseFiles(File[] paths) { 308 for (File path : paths) { 309 eraseFiles(path); 310 } 311 } 312 313 void eraseFiles(File path) { 314 if (path.isDirectory()) { 315 String[] files = path.list(); 316 if (files != null) { 317 for (String file : files) { 318 eraseFiles(new File(path, file)); 319 } 320 } 321 } 322 path.delete(); 323 } 324 325 public IBinder onBind(Intent intent) { 326 return mBinder; 327 } 328 329 private String copyResourceInner(Uri packageURI, String newCid, String key, String resFileName, 330 String publicResFileName, boolean isExternal, boolean isForwardLocked, 331 String abiOverride) { 332 333 if (isExternal) { 334 // Make sure the sdcard is mounted. 335 String status = Environment.getExternalStorageState(); 336 if (!status.equals(Environment.MEDIA_MOUNTED)) { 337 Slog.w(TAG, "Make sure sdcard is mounted."); 338 return null; 339 } 340 } 341 342 // The .apk file 343 String codePath = packageURI.getPath(); 344 File codeFile = new File(codePath); 345 String[] abiList = (abiOverride != null) ? new String[] { abiOverride } 346 : Build.SUPPORTED_ABIS; 347 NativeLibraryHelper.ApkHandle handle = new NativeLibraryHelper.ApkHandle(codePath); 348 final int abi = NativeLibraryHelper.findSupportedAbi(handle, abiList); 349 350 // Calculate size of container needed to hold base APK. 351 final int sizeMb; 352 try { 353 sizeMb = calculateContainerSize(handle, codeFile, abi, isForwardLocked); 354 } catch (IOException e) { 355 Slog.w(TAG, "Problem when trying to copy " + codeFile.getPath()); 356 return null; 357 } 358 359 // Create new container 360 final String newCachePath = PackageHelper.createSdDir(sizeMb, newCid, key, Process.myUid(), 361 isExternal); 362 if (newCachePath == null) { 363 Slog.e(TAG, "Failed to create container " + newCid); 364 return null; 365 } 366 367 if (localLOGV) { 368 Slog.i(TAG, "Created container for " + newCid + " at path : " + newCachePath); 369 } 370 371 final File resFile = new File(newCachePath, resFileName); 372 if (FileUtils.copyFile(new File(codePath), resFile)) { 373 if (localLOGV) { 374 Slog.i(TAG, "Copied " + codePath + " to " + resFile); 375 } 376 } else { 377 Slog.e(TAG, "Failed to copy " + codePath + " to " + resFile); 378 // Clean up container 379 PackageHelper.destroySdDir(newCid); 380 return null; 381 } 382 383 try { 384 Os.chmod(resFile.getAbsolutePath(), 0640); 385 } catch (ErrnoException e) { 386 Slog.e(TAG, "Could not chown APK: " + e.getMessage()); 387 PackageHelper.destroySdDir(newCid); 388 return null; 389 } 390 391 if (isForwardLocked) { 392 File publicZipFile = new File(newCachePath, publicResFileName); 393 try { 394 PackageHelper.extractPublicFiles(resFile.getAbsolutePath(), publicZipFile); 395 if (localLOGV) { 396 Slog.i(TAG, "Copied resources to " + publicZipFile); 397 } 398 } catch (IOException e) { 399 Slog.e(TAG, "Could not chown public APK " + publicZipFile.getAbsolutePath() + ": " 400 + e.getMessage()); 401 PackageHelper.destroySdDir(newCid); 402 return null; 403 } 404 405 try { 406 Os.chmod(publicZipFile.getAbsolutePath(), 0644); 407 } catch (ErrnoException e) { 408 Slog.e(TAG, "Could not chown public resource file: " + e.getMessage()); 409 PackageHelper.destroySdDir(newCid); 410 return null; 411 } 412 } 413 414 final File sharedLibraryDir = new File(newCachePath, LIB_DIR_NAME); 415 if (sharedLibraryDir.mkdir()) { 416 int ret = PackageManager.INSTALL_SUCCEEDED; 417 if (abi >= 0) { 418 ret = NativeLibraryHelper.copyNativeBinariesIfNeededLI(handle, 419 sharedLibraryDir, abiList[abi]); 420 } else if (abi != PackageManager.NO_NATIVE_LIBRARIES) { 421 ret = abi; 422 } 423 424 if (ret != PackageManager.INSTALL_SUCCEEDED) { 425 Slog.e(TAG, "Could not copy native libraries to " + sharedLibraryDir.getPath()); 426 PackageHelper.destroySdDir(newCid); 427 return null; 428 } 429 } else { 430 Slog.e(TAG, "Could not create native lib directory: " + sharedLibraryDir.getPath()); 431 PackageHelper.destroySdDir(newCid); 432 return null; 433 } 434 435 if (!PackageHelper.finalizeSdDir(newCid)) { 436 Slog.e(TAG, "Failed to finalize " + newCid + " at path " + newCachePath); 437 // Clean up container 438 PackageHelper.destroySdDir(newCid); 439 return null; 440 } 441 442 if (localLOGV) { 443 Slog.i(TAG, "Finalized container " + newCid); 444 } 445 446 if (PackageHelper.isContainerMounted(newCid)) { 447 if (localLOGV) { 448 Slog.i(TAG, "Unmounting " + newCid + " at path " + newCachePath); 449 } 450 451 // Force a gc to avoid being killed. 452 Runtime.getRuntime().gc(); 453 PackageHelper.unMountSdDir(newCid); 454 } else { 455 if (localLOGV) { 456 Slog.i(TAG, "Container " + newCid + " not mounted"); 457 } 458 } 459 460 return newCachePath; 461 } 462 463 private static void copyToFile(InputStream inputStream, OutputStream out) throws IOException { 464 byte[] buffer = new byte[16384]; 465 int bytesRead; 466 while ((bytesRead = inputStream.read(buffer)) >= 0) { 467 out.write(buffer, 0, bytesRead); 468 } 469 } 470 471 private void copyFile(Uri pPackageURI, OutputStream outStream, 472 ContainerEncryptionParams encryptionParams) throws FileNotFoundException, IOException, 473 DigestException { 474 String scheme = pPackageURI.getScheme(); 475 InputStream inStream = null; 476 try { 477 if (scheme == null || scheme.equals("file")) { 478 final InputStream is = new FileInputStream(new File(pPackageURI.getPath())); 479 inStream = new BufferedInputStream(is); 480 } else if (scheme.equals("content")) { 481 final ParcelFileDescriptor fd; 482 try { 483 fd = getContentResolver().openFileDescriptor(pPackageURI, "r"); 484 } catch (FileNotFoundException e) { 485 Slog.e(TAG, "Couldn't open file descriptor from download service. " 486 + "Failed with exception " + e); 487 throw e; 488 } 489 490 if (fd == null) { 491 Slog.e(TAG, "Provider returned no file descriptor for " + 492 pPackageURI.toString()); 493 throw new FileNotFoundException("provider returned no file descriptor"); 494 } else { 495 if (localLOGV) { 496 Slog.i(TAG, "Opened file descriptor from download service."); 497 } 498 inStream = new ParcelFileDescriptor.AutoCloseInputStream(fd); 499 } 500 } else { 501 Slog.e(TAG, "Package URI is not 'file:' or 'content:' - " + pPackageURI); 502 throw new FileNotFoundException("Package URI is not 'file:' or 'content:'"); 503 } 504 505 /* 506 * If this resource is encrypted, get the decrypted stream version 507 * of it. 508 */ 509 ApkContainer container = new ApkContainer(inStream, encryptionParams); 510 511 try { 512 /* 513 * We copy the source package file to a temp file and then 514 * rename it to the destination file in order to eliminate a 515 * window where the package directory scanner notices the new 516 * package file but it's not completely copied yet. 517 */ 518 copyToFile(container.getInputStream(), outStream); 519 520 if (!container.isAuthenticated()) { 521 throw new DigestException(); 522 } 523 } catch (GeneralSecurityException e) { 524 throw new DigestException("A problem occured copying the file."); 525 } 526 } finally { 527 IoUtils.closeQuietly(inStream); 528 } 529 } 530 531 private static class ApkContainer { 532 private static final int MAX_AUTHENTICATED_DATA_SIZE = 16384; 533 534 private final InputStream mInStream; 535 536 private MacAuthenticatedInputStream mAuthenticatedStream; 537 538 private byte[] mTag; 539 540 public ApkContainer(InputStream inStream, ContainerEncryptionParams encryptionParams) 541 throws IOException { 542 if (encryptionParams == null) { 543 mInStream = inStream; 544 } else { 545 mInStream = getDecryptedStream(inStream, encryptionParams); 546 mTag = encryptionParams.getMacTag(); 547 } 548 } 549 550 public boolean isAuthenticated() { 551 if (mAuthenticatedStream == null) { 552 return true; 553 } 554 555 return mAuthenticatedStream.isTagEqual(mTag); 556 } 557 558 private Mac getMacInstance(ContainerEncryptionParams encryptionParams) throws IOException { 559 final Mac m; 560 try { 561 final String macAlgo = encryptionParams.getMacAlgorithm(); 562 563 if (macAlgo != null) { 564 m = Mac.getInstance(macAlgo); 565 m.init(encryptionParams.getMacKey(), encryptionParams.getMacSpec()); 566 } else { 567 m = null; 568 } 569 570 return m; 571 } catch (NoSuchAlgorithmException e) { 572 throw new IOException(e); 573 } catch (InvalidKeyException e) { 574 throw new IOException(e); 575 } catch (InvalidAlgorithmParameterException e) { 576 throw new IOException(e); 577 } 578 } 579 580 public InputStream getInputStream() { 581 return mInStream; 582 } 583 584 private InputStream getDecryptedStream(InputStream inStream, 585 ContainerEncryptionParams encryptionParams) throws IOException { 586 final Cipher c; 587 try { 588 c = Cipher.getInstance(encryptionParams.getEncryptionAlgorithm()); 589 c.init(Cipher.DECRYPT_MODE, encryptionParams.getEncryptionKey(), 590 encryptionParams.getEncryptionSpec()); 591 } catch (NoSuchAlgorithmException e) { 592 throw new IOException(e); 593 } catch (NoSuchPaddingException e) { 594 throw new IOException(e); 595 } catch (InvalidKeyException e) { 596 throw new IOException(e); 597 } catch (InvalidAlgorithmParameterException e) { 598 throw new IOException(e); 599 } 600 601 final long encStart = encryptionParams.getEncryptedDataStart(); 602 final long end = encryptionParams.getDataEnd(); 603 if (end < encStart) { 604 throw new IOException("end <= encStart"); 605 } 606 607 final Mac mac = getMacInstance(encryptionParams); 608 if (mac != null) { 609 final long macStart = encryptionParams.getAuthenticatedDataStart(); 610 if (macStart >= Integer.MAX_VALUE) { 611 throw new IOException("macStart >= Integer.MAX_VALUE"); 612 } 613 614 final long furtherOffset; 615 if (macStart >= 0 && encStart >= 0 && macStart < encStart) { 616 /* 617 * If there is authenticated data at the beginning, read 618 * that into our MAC first. 619 */ 620 final long authenticatedLengthLong = encStart - macStart; 621 if (authenticatedLengthLong > MAX_AUTHENTICATED_DATA_SIZE) { 622 throw new IOException("authenticated data is too long"); 623 } 624 final int authenticatedLength = (int) authenticatedLengthLong; 625 626 final byte[] authenticatedData = new byte[(int) authenticatedLength]; 627 628 Streams.readFully(inStream, authenticatedData, (int) macStart, 629 authenticatedLength); 630 mac.update(authenticatedData, 0, authenticatedLength); 631 632 furtherOffset = 0; 633 } else { 634 /* 635 * No authenticated data at the beginning. Just skip the 636 * required number of bytes to the beginning of the stream. 637 */ 638 if (encStart > 0) { 639 furtherOffset = encStart; 640 } else { 641 furtherOffset = 0; 642 } 643 } 644 645 /* 646 * If there is data at the end of the stream we want to ignore, 647 * wrap this in a LimitedLengthInputStream. 648 */ 649 if (furtherOffset >= 0 && end > furtherOffset) { 650 inStream = new LimitedLengthInputStream(inStream, furtherOffset, end - encStart); 651 } else if (furtherOffset > 0) { 652 inStream.skip(furtherOffset); 653 } 654 655 mAuthenticatedStream = new MacAuthenticatedInputStream(inStream, mac); 656 657 inStream = mAuthenticatedStream; 658 } else { 659 if (encStart >= 0) { 660 if (end > encStart) { 661 inStream = new LimitedLengthInputStream(inStream, encStart, end - encStart); 662 } else { 663 inStream.skip(encStart); 664 } 665 } 666 } 667 668 return new CipherInputStream(inStream, c); 669 } 670 671 } 672 673 private static final int PREFER_INTERNAL = 1; 674 private static final int PREFER_EXTERNAL = 2; 675 676 private int recommendAppInstallLocation(int installLocation, String archiveFilePath, int flags, 677 long threshold, String abiOverride) { 678 int prefer; 679 boolean checkBoth = false; 680 681 final boolean isForwardLocked = (flags & PackageManager.INSTALL_FORWARD_LOCK) != 0; 682 683 check_inner : { 684 /* 685 * Explicit install flags should override the manifest settings. 686 */ 687 if ((flags & PackageManager.INSTALL_INTERNAL) != 0) { 688 prefer = PREFER_INTERNAL; 689 break check_inner; 690 } else if ((flags & PackageManager.INSTALL_EXTERNAL) != 0) { 691 prefer = PREFER_EXTERNAL; 692 break check_inner; 693 } 694 695 /* No install flags. Check for manifest option. */ 696 if (installLocation == PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY) { 697 prefer = PREFER_INTERNAL; 698 break check_inner; 699 } else if (installLocation == PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL) { 700 prefer = PREFER_EXTERNAL; 701 checkBoth = true; 702 break check_inner; 703 } else if (installLocation == PackageInfo.INSTALL_LOCATION_AUTO) { 704 // We default to preferring internal storage. 705 prefer = PREFER_INTERNAL; 706 checkBoth = true; 707 break check_inner; 708 } 709 710 // Pick user preference 711 int installPreference = Settings.Global.getInt(getApplicationContext() 712 .getContentResolver(), 713 Settings.Global.DEFAULT_INSTALL_LOCATION, 714 PackageHelper.APP_INSTALL_AUTO); 715 if (installPreference == PackageHelper.APP_INSTALL_INTERNAL) { 716 prefer = PREFER_INTERNAL; 717 break check_inner; 718 } else if (installPreference == PackageHelper.APP_INSTALL_EXTERNAL) { 719 prefer = PREFER_EXTERNAL; 720 break check_inner; 721 } 722 723 /* 724 * Fall back to default policy of internal-only if nothing else is 725 * specified. 726 */ 727 prefer = PREFER_INTERNAL; 728 } 729 730 final boolean emulated = Environment.isExternalStorageEmulated(); 731 732 final File apkFile = new File(archiveFilePath); 733 734 boolean fitsOnInternal = false; 735 if (checkBoth || prefer == PREFER_INTERNAL) { 736 try { 737 fitsOnInternal = isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 738 } catch (IOException e) { 739 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 740 } 741 } 742 743 boolean fitsOnSd = false; 744 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL)) { 745 try { 746 fitsOnSd = isUnderExternalThreshold(apkFile, isForwardLocked, abiOverride); 747 } catch (IOException e) { 748 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 749 } 750 } 751 752 if (prefer == PREFER_INTERNAL) { 753 if (fitsOnInternal) { 754 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 755 } 756 } else if (!emulated && prefer == PREFER_EXTERNAL) { 757 if (fitsOnSd) { 758 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 759 } 760 } 761 762 if (checkBoth) { 763 if (fitsOnInternal) { 764 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 765 } else if (!emulated && fitsOnSd) { 766 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 767 } 768 } 769 770 /* 771 * If they requested to be on the external media by default, return that 772 * the media was unavailable. Otherwise, indicate there was insufficient 773 * storage space available. 774 */ 775 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL) 776 && !Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 777 return PackageHelper.RECOMMEND_MEDIA_UNAVAILABLE; 778 } else { 779 return PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE; 780 } 781 } 782 783 /** 784 * Measure a file to see if it fits within the free space threshold. 785 * 786 * @param apkFile file to check 787 * @param threshold byte threshold to compare against 788 * @return true if file fits under threshold 789 * @throws FileNotFoundException when APK does not exist 790 */ 791 private boolean isUnderInternalThreshold(File apkFile, boolean isForwardLocked, long threshold) 792 throws IOException { 793 long size = apkFile.length(); 794 if (size == 0 && !apkFile.exists()) { 795 throw new FileNotFoundException(); 796 } 797 798 if (isForwardLocked) { 799 size += PackageHelper.extractPublicFiles(apkFile.getAbsolutePath(), null); 800 } 801 802 final StatFs internalStats = new StatFs(Environment.getDataDirectory().getPath()); 803 final long availInternalSize = (long) internalStats.getAvailableBlocks() 804 * (long) internalStats.getBlockSize(); 805 806 return (availInternalSize - size) > threshold; 807 } 808 809 810 /** 811 * Measure a file to see if it fits in the external free space. 812 * 813 * @param apkFile file to check 814 * @return true if file fits 815 * @throws IOException when file does not exist 816 */ 817 private boolean isUnderExternalThreshold(File apkFile, boolean isForwardLocked, String abiOverride) 818 throws IOException { 819 if (Environment.isExternalStorageEmulated()) { 820 return false; 821 } 822 823 final int sizeMb = calculateContainerSize(apkFile, isForwardLocked, abiOverride); 824 825 final int availSdMb; 826 if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 827 final StatFs sdStats = new StatFs(Environment.getExternalStorageDirectory().getPath()); 828 final int blocksToMb = (1 << 20) / sdStats.getBlockSize(); 829 availSdMb = sdStats.getAvailableBlocks() * blocksToMb; 830 } else { 831 availSdMb = -1; 832 } 833 834 return availSdMb > sizeMb; 835 } 836 837 private int calculateContainerSize(File apkFile, boolean forwardLocked, 838 String abiOverride) throws IOException { 839 NativeLibraryHelper.ApkHandle handle = new NativeLibraryHelper.ApkHandle(apkFile); 840 final int abi = NativeLibraryHelper.findSupportedAbi(handle, 841 (abiOverride != null) ? new String[] { abiOverride } : Build.SUPPORTED_ABIS); 842 843 try { 844 return calculateContainerSize(handle, apkFile, abi, forwardLocked); 845 } finally { 846 handle.close(); 847 } 848 } 849 850 /** 851 * Calculate the container size for an APK. Takes into account the 852 * 853 * @param apkFile file from which to calculate size 854 * @return size in megabytes (2^20 bytes) 855 * @throws IOException when there is a problem reading the file 856 */ 857 private int calculateContainerSize(NativeLibraryHelper.ApkHandle apkHandle, 858 File apkFile, int abiIndex, boolean forwardLocked) throws IOException { 859 // Calculate size of container needed to hold base APK. 860 long sizeBytes = apkFile.length(); 861 if (sizeBytes == 0 && !apkFile.exists()) { 862 throw new FileNotFoundException(); 863 } 864 865 // Check all the native files that need to be copied and add that to the 866 // container size. 867 if (abiIndex >= 0) { 868 sizeBytes += NativeLibraryHelper.sumNativeBinariesLI(apkHandle, 869 Build.SUPPORTED_ABIS[abiIndex]); 870 } 871 872 if (forwardLocked) { 873 sizeBytes += PackageHelper.extractPublicFiles(apkFile.getPath(), null); 874 } 875 876 int sizeMb = (int) (sizeBytes >> 20); 877 if ((sizeBytes - (sizeMb * 1024 * 1024)) > 0) { 878 sizeMb++; 879 } 880 881 /* 882 * Add buffer size because we don't have a good way to determine the 883 * real FAT size. Your FAT size varies with how many directory entries 884 * you need, how big the whole filesystem is, and other such headaches. 885 */ 886 sizeMb++; 887 888 return sizeMb; 889 } 890} 891