DefaultContainerService.java revision 625239a05401bbf18b04d9874cea3f82da7c29a1
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 com.android.internal.app.IMediaContainerService; 20import com.android.internal.content.NativeLibraryHelper; 21import com.android.internal.content.PackageHelper; 22 23import android.app.IntentService; 24import android.content.Intent; 25import android.content.pm.MacAuthenticatedInputStream; 26import android.content.pm.ContainerEncryptionParams; 27import android.content.pm.IPackageManager; 28import android.content.pm.LimitedLengthInputStream; 29import android.content.pm.PackageCleanItem; 30import android.content.pm.PackageInfo; 31import android.content.pm.PackageInfoLite; 32import android.content.pm.PackageManager; 33import android.content.pm.PackageParser; 34import android.content.res.ObbInfo; 35import android.content.res.ObbScanner; 36import android.net.Uri; 37import android.os.Environment; 38import android.os.Environment.UserEnvironment; 39import android.os.FileUtils; 40import android.os.IBinder; 41import android.os.ParcelFileDescriptor; 42import android.os.Process; 43import android.os.RemoteException; 44import android.os.ServiceManager; 45import android.os.StatFs; 46import android.provider.Settings; 47import android.util.DisplayMetrics; 48import android.util.Slog; 49 50import java.io.BufferedInputStream; 51import java.io.File; 52import java.io.FileInputStream; 53import java.io.FileNotFoundException; 54import java.io.IOException; 55import java.io.InputStream; 56import java.io.OutputStream; 57import java.security.DigestException; 58import java.security.GeneralSecurityException; 59import java.security.InvalidAlgorithmParameterException; 60import java.security.InvalidKeyException; 61import java.security.NoSuchAlgorithmException; 62 63import javax.crypto.Cipher; 64import javax.crypto.CipherInputStream; 65import javax.crypto.Mac; 66import javax.crypto.NoSuchPaddingException; 67 68import libcore.io.ErrnoException; 69import libcore.io.IoUtils; 70import libcore.io.Libcore; 71import libcore.io.Streams; 72import libcore.io.StructStatFs; 73 74/* 75 * This service copies a downloaded apk to a file passed in as 76 * a ParcelFileDescriptor or to a newly created container specified 77 * by parameters. The DownloadManager gives access to this process 78 * based on its uid. This process also needs the ACCESS_DOWNLOAD_MANAGER 79 * permission to access apks downloaded via the download manager. 80 */ 81public class DefaultContainerService extends IntentService { 82 private static final String TAG = "DefContainer"; 83 private static final boolean localLOGV = true; 84 85 private static final String LIB_DIR_NAME = "lib"; 86 87 private IMediaContainerService.Stub mBinder = new IMediaContainerService.Stub() { 88 /** 89 * Creates a new container and copies resource there. 90 * @param paackageURI the uri of resource to be copied. Can be either 91 * a content uri or a file uri 92 * @param cid the id of the secure container that should 93 * be used for creating a secure container into which the resource 94 * will be copied. 95 * @param key Refers to key used for encrypting the secure container 96 * @param resFileName Name of the target resource file(relative to newly 97 * created secure container) 98 * @return Returns the new cache path where the resource has been copied into 99 * 100 */ 101 public String copyResourceToContainer(final Uri packageURI, final String cid, 102 final String key, final String resFileName, final String publicResFileName, 103 boolean isExternal, boolean isForwardLocked) { 104 if (packageURI == null || cid == null) { 105 return null; 106 } 107 108 return copyResourceInner(packageURI, cid, key, resFileName, publicResFileName, 109 isExternal, isForwardLocked); 110 } 111 112 /** 113 * Copy specified resource to output stream 114 * 115 * @param packageURI the uri of resource to be copied. Should be a file 116 * uri 117 * @param encryptionParams parameters describing the encryption used for 118 * this file 119 * @param outStream Remote file descriptor to be used for copying 120 * @return returns status code according to those in 121 * {@link PackageManager} 122 */ 123 public int copyResource(final Uri packageURI, ContainerEncryptionParams encryptionParams, 124 ParcelFileDescriptor outStream) { 125 if (packageURI == null || outStream == null) { 126 return PackageManager.INSTALL_FAILED_INVALID_URI; 127 } 128 129 ParcelFileDescriptor.AutoCloseOutputStream autoOut 130 = new ParcelFileDescriptor.AutoCloseOutputStream(outStream); 131 132 try { 133 copyFile(packageURI, autoOut, encryptionParams); 134 return PackageManager.INSTALL_SUCCEEDED; 135 } catch (FileNotFoundException e) { 136 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " FNF: " 137 + e.getMessage()); 138 return PackageManager.INSTALL_FAILED_INVALID_URI; 139 } catch (IOException e) { 140 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " IO: " 141 + e.getMessage()); 142 return PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE; 143 } catch (DigestException e) { 144 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " Security: " 145 + e.getMessage()); 146 return PackageManager.INSTALL_FAILED_INVALID_APK; 147 } 148 } 149 150 /** 151 * Determine the recommended install location for package 152 * specified by file uri location. 153 * @param fileUri the uri of resource to be copied. Should be a 154 * file uri 155 * @return Returns PackageInfoLite object containing 156 * the package info and recommended app location. 157 */ 158 public PackageInfoLite getMinimalPackageInfo(final String packagePath, int flags, 159 long threshold) { 160 PackageInfoLite ret = new PackageInfoLite(); 161 162 if (packagePath == null) { 163 Slog.i(TAG, "Invalid package file " + packagePath); 164 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 165 return ret; 166 } 167 168 DisplayMetrics metrics = new DisplayMetrics(); 169 metrics.setToDefaults(); 170 171 PackageParser.PackageLite pkg = PackageParser.parsePackageLite(packagePath, 0); 172 if (pkg == null) { 173 Slog.w(TAG, "Failed to parse package"); 174 175 final File apkFile = new File(packagePath); 176 if (!apkFile.exists()) { 177 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_URI; 178 } else { 179 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 180 } 181 182 return ret; 183 } 184 185 ret.packageName = pkg.packageName; 186 ret.versionCode = pkg.versionCode; 187 ret.installLocation = pkg.installLocation; 188 ret.verifiers = pkg.verifiers; 189 190 ret.recommendedInstallLocation = recommendAppInstallLocation(pkg.installLocation, 191 packagePath, flags, threshold); 192 193 return ret; 194 } 195 196 @Override 197 public boolean checkInternalFreeStorage(Uri packageUri, boolean isForwardLocked, 198 long threshold) throws RemoteException { 199 final File apkFile = new File(packageUri.getPath()); 200 try { 201 return isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 202 } catch (IOException e) { 203 return true; 204 } 205 } 206 207 @Override 208 public boolean checkExternalFreeStorage(Uri packageUri, boolean isForwardLocked) 209 throws RemoteException { 210 final File apkFile = new File(packageUri.getPath()); 211 try { 212 return isUnderExternalThreshold(apkFile, isForwardLocked); 213 } catch (IOException e) { 214 return true; 215 } 216 } 217 218 public ObbInfo getObbInfo(String filename) { 219 try { 220 return ObbScanner.getObbInfo(filename); 221 } catch (IOException e) { 222 Slog.d(TAG, "Couldn't get OBB info for " + filename); 223 return null; 224 } 225 } 226 227 @Override 228 public long calculateDirectorySize(String path) throws RemoteException { 229 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 230 231 final File directory = new File(path); 232 if (directory.exists() && directory.isDirectory()) { 233 return MeasurementUtils.measureDirectory(path); 234 } else { 235 return 0L; 236 } 237 } 238 239 @Override 240 public long[] getFileSystemStats(String path) { 241 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 242 243 try { 244 final StructStatFs stat = Libcore.os.statfs(path); 245 final long totalSize = stat.f_blocks * stat.f_bsize; 246 final long availSize = stat.f_bavail * stat.f_bsize; 247 return new long[] { totalSize, availSize }; 248 } catch (ErrnoException e) { 249 throw new IllegalStateException(e); 250 } 251 } 252 253 @Override 254 public void clearDirectory(String path) throws RemoteException { 255 Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND); 256 257 final File directory = new File(path); 258 if (directory.exists() && directory.isDirectory()) { 259 eraseFiles(directory); 260 } 261 } 262 }; 263 264 public DefaultContainerService() { 265 super("DefaultContainerService"); 266 setIntentRedelivery(true); 267 } 268 269 @Override 270 protected void onHandleIntent(Intent intent) { 271 if (PackageManager.ACTION_CLEAN_EXTERNAL_STORAGE.equals(intent.getAction())) { 272 final IPackageManager pm = IPackageManager.Stub.asInterface( 273 ServiceManager.getService("package")); 274 PackageCleanItem item = null; 275 try { 276 while ((item = pm.nextPackageToClean(item)) != null) { 277 final UserEnvironment userEnv = new UserEnvironment(item.userId); 278 eraseFiles(userEnv.getExternalStorageAppDataDirectory(item.packageName)); 279 eraseFiles(userEnv.getExternalStorageAppMediaDirectory(item.packageName)); 280 if (item.andCode) { 281 eraseFiles(userEnv.getExternalStorageAppObbDirectory(item.packageName)); 282 } 283 } 284 } catch (RemoteException e) { 285 } 286 } 287 } 288 289 void eraseFiles(File path) { 290 if (path.isDirectory()) { 291 String[] files = path.list(); 292 if (files != null) { 293 for (String file : files) { 294 eraseFiles(new File(path, file)); 295 } 296 } 297 } 298 path.delete(); 299 } 300 301 public IBinder onBind(Intent intent) { 302 return mBinder; 303 } 304 305 private String copyResourceInner(Uri packageURI, String newCid, String key, String resFileName, 306 String publicResFileName, boolean isExternal, boolean isForwardLocked) { 307 308 if (isExternal) { 309 // Make sure the sdcard is mounted. 310 String status = Environment.getExternalStorageState(); 311 if (!status.equals(Environment.MEDIA_MOUNTED)) { 312 Slog.w(TAG, "Make sure sdcard is mounted."); 313 return null; 314 } 315 } 316 317 // The .apk file 318 String codePath = packageURI.getPath(); 319 File codeFile = new File(codePath); 320 321 // Calculate size of container needed to hold base APK. 322 final int sizeMb; 323 try { 324 sizeMb = calculateContainerSize(codeFile, isForwardLocked); 325 } catch (IOException e) { 326 Slog.w(TAG, "Problem when trying to copy " + codeFile.getPath()); 327 return null; 328 } 329 330 // Create new container 331 final String newCachePath = PackageHelper.createSdDir(sizeMb, newCid, key, Process.myUid(), 332 isExternal); 333 if (newCachePath == null) { 334 Slog.e(TAG, "Failed to create container " + newCid); 335 return null; 336 } 337 338 if (localLOGV) { 339 Slog.i(TAG, "Created container for " + newCid + " at path : " + newCachePath); 340 } 341 342 final File resFile = new File(newCachePath, resFileName); 343 if (FileUtils.copyFile(new File(codePath), resFile)) { 344 if (localLOGV) { 345 Slog.i(TAG, "Copied " + codePath + " to " + resFile); 346 } 347 } else { 348 Slog.e(TAG, "Failed to copy " + codePath + " to " + resFile); 349 // Clean up container 350 PackageHelper.destroySdDir(newCid); 351 return null; 352 } 353 354 try { 355 Libcore.os.chmod(resFile.getAbsolutePath(), 0640); 356 } catch (ErrnoException e) { 357 Slog.e(TAG, "Could not chown APK: " + e.getMessage()); 358 PackageHelper.destroySdDir(newCid); 359 return null; 360 } 361 362 if (isForwardLocked) { 363 File publicZipFile = new File(newCachePath, publicResFileName); 364 try { 365 PackageHelper.extractPublicFiles(resFile.getAbsolutePath(), publicZipFile); 366 if (localLOGV) { 367 Slog.i(TAG, "Copied resources to " + publicZipFile); 368 } 369 } catch (IOException e) { 370 Slog.e(TAG, "Could not chown public APK " + publicZipFile.getAbsolutePath() + ": " 371 + e.getMessage()); 372 PackageHelper.destroySdDir(newCid); 373 return null; 374 } 375 376 try { 377 Libcore.os.chmod(publicZipFile.getAbsolutePath(), 0644); 378 } catch (ErrnoException e) { 379 Slog.e(TAG, "Could not chown public resource file: " + e.getMessage()); 380 PackageHelper.destroySdDir(newCid); 381 return null; 382 } 383 } 384 385 final File sharedLibraryDir = new File(newCachePath, LIB_DIR_NAME); 386 if (sharedLibraryDir.mkdir()) { 387 int ret = NativeLibraryHelper.copyNativeBinariesIfNeededLI(codeFile, sharedLibraryDir); 388 if (ret != PackageManager.INSTALL_SUCCEEDED) { 389 Slog.e(TAG, "Could not copy native libraries to " + sharedLibraryDir.getPath()); 390 PackageHelper.destroySdDir(newCid); 391 return null; 392 } 393 } else { 394 Slog.e(TAG, "Could not create native lib directory: " + sharedLibraryDir.getPath()); 395 PackageHelper.destroySdDir(newCid); 396 return null; 397 } 398 399 if (!PackageHelper.finalizeSdDir(newCid)) { 400 Slog.e(TAG, "Failed to finalize " + newCid + " at path " + newCachePath); 401 // Clean up container 402 PackageHelper.destroySdDir(newCid); 403 return null; 404 } 405 406 if (localLOGV) { 407 Slog.i(TAG, "Finalized container " + newCid); 408 } 409 410 if (PackageHelper.isContainerMounted(newCid)) { 411 if (localLOGV) { 412 Slog.i(TAG, "Unmounting " + newCid + " at path " + newCachePath); 413 } 414 415 // Force a gc to avoid being killed. 416 Runtime.getRuntime().gc(); 417 PackageHelper.unMountSdDir(newCid); 418 } else { 419 if (localLOGV) { 420 Slog.i(TAG, "Container " + newCid + " not mounted"); 421 } 422 } 423 424 return newCachePath; 425 } 426 427 private static void copyToFile(InputStream inputStream, OutputStream out) throws IOException { 428 byte[] buffer = new byte[16384]; 429 int bytesRead; 430 while ((bytesRead = inputStream.read(buffer)) >= 0) { 431 out.write(buffer, 0, bytesRead); 432 } 433 } 434 435 private void copyFile(Uri pPackageURI, OutputStream outStream, 436 ContainerEncryptionParams encryptionParams) throws FileNotFoundException, IOException, 437 DigestException { 438 String scheme = pPackageURI.getScheme(); 439 InputStream inStream = null; 440 try { 441 if (scheme == null || scheme.equals("file")) { 442 final InputStream is = new FileInputStream(new File(pPackageURI.getPath())); 443 inStream = new BufferedInputStream(is); 444 } else if (scheme.equals("content")) { 445 final ParcelFileDescriptor fd; 446 try { 447 fd = getContentResolver().openFileDescriptor(pPackageURI, "r"); 448 } catch (FileNotFoundException e) { 449 Slog.e(TAG, "Couldn't open file descriptor from download service. " 450 + "Failed with exception " + e); 451 throw e; 452 } 453 454 if (fd == null) { 455 Slog.e(TAG, "Provider returned no file descriptor for " + 456 pPackageURI.toString()); 457 throw new FileNotFoundException("provider returned no file descriptor"); 458 } else { 459 if (localLOGV) { 460 Slog.i(TAG, "Opened file descriptor from download service."); 461 } 462 inStream = new ParcelFileDescriptor.AutoCloseInputStream(fd); 463 } 464 } else { 465 Slog.e(TAG, "Package URI is not 'file:' or 'content:' - " + pPackageURI); 466 throw new FileNotFoundException("Package URI is not 'file:' or 'content:'"); 467 } 468 469 /* 470 * If this resource is encrypted, get the decrypted stream version 471 * of it. 472 */ 473 ApkContainer container = new ApkContainer(inStream, encryptionParams); 474 475 try { 476 /* 477 * We copy the source package file to a temp file and then 478 * rename it to the destination file in order to eliminate a 479 * window where the package directory scanner notices the new 480 * package file but it's not completely copied yet. 481 */ 482 copyToFile(container.getInputStream(), outStream); 483 484 if (!container.isAuthenticated()) { 485 throw new DigestException(); 486 } 487 } catch (GeneralSecurityException e) { 488 throw new DigestException("A problem occured copying the file."); 489 } 490 } finally { 491 IoUtils.closeQuietly(inStream); 492 } 493 } 494 495 private static class ApkContainer { 496 private static final int MAX_AUTHENTICATED_DATA_SIZE = 16384; 497 498 private final InputStream mInStream; 499 500 private MacAuthenticatedInputStream mAuthenticatedStream; 501 502 private byte[] mTag; 503 504 public ApkContainer(InputStream inStream, ContainerEncryptionParams encryptionParams) 505 throws IOException { 506 if (encryptionParams == null) { 507 mInStream = inStream; 508 } else { 509 mInStream = getDecryptedStream(inStream, encryptionParams); 510 mTag = encryptionParams.getMacTag(); 511 } 512 } 513 514 public boolean isAuthenticated() { 515 if (mAuthenticatedStream == null) { 516 return true; 517 } 518 519 return mAuthenticatedStream.isTagEqual(mTag); 520 } 521 522 private Mac getMacInstance(ContainerEncryptionParams encryptionParams) throws IOException { 523 final Mac m; 524 try { 525 final String macAlgo = encryptionParams.getMacAlgorithm(); 526 527 if (macAlgo != null) { 528 m = Mac.getInstance(macAlgo); 529 m.init(encryptionParams.getMacKey(), encryptionParams.getMacSpec()); 530 } else { 531 m = null; 532 } 533 534 return m; 535 } catch (NoSuchAlgorithmException e) { 536 throw new IOException(e); 537 } catch (InvalidKeyException e) { 538 throw new IOException(e); 539 } catch (InvalidAlgorithmParameterException e) { 540 throw new IOException(e); 541 } 542 } 543 544 public InputStream getInputStream() { 545 return mInStream; 546 } 547 548 private InputStream getDecryptedStream(InputStream inStream, 549 ContainerEncryptionParams encryptionParams) throws IOException { 550 final Cipher c; 551 try { 552 c = Cipher.getInstance(encryptionParams.getEncryptionAlgorithm()); 553 c.init(Cipher.DECRYPT_MODE, encryptionParams.getEncryptionKey(), 554 encryptionParams.getEncryptionSpec()); 555 } catch (NoSuchAlgorithmException e) { 556 throw new IOException(e); 557 } catch (NoSuchPaddingException e) { 558 throw new IOException(e); 559 } catch (InvalidKeyException e) { 560 throw new IOException(e); 561 } catch (InvalidAlgorithmParameterException e) { 562 throw new IOException(e); 563 } 564 565 final long encStart = encryptionParams.getEncryptedDataStart(); 566 final long end = encryptionParams.getDataEnd(); 567 if (end < encStart) { 568 throw new IOException("end <= encStart"); 569 } 570 571 final Mac mac = getMacInstance(encryptionParams); 572 if (mac != null) { 573 final long macStart = encryptionParams.getAuthenticatedDataStart(); 574 if (macStart >= Integer.MAX_VALUE) { 575 throw new IOException("macStart >= Integer.MAX_VALUE"); 576 } 577 578 final long furtherOffset; 579 if (macStart >= 0 && encStart >= 0 && macStart < encStart) { 580 /* 581 * If there is authenticated data at the beginning, read 582 * that into our MAC first. 583 */ 584 final long authenticatedLengthLong = encStart - macStart; 585 if (authenticatedLengthLong > MAX_AUTHENTICATED_DATA_SIZE) { 586 throw new IOException("authenticated data is too long"); 587 } 588 final int authenticatedLength = (int) authenticatedLengthLong; 589 590 final byte[] authenticatedData = new byte[(int) authenticatedLength]; 591 592 Streams.readFully(inStream, authenticatedData, (int) macStart, 593 authenticatedLength); 594 mac.update(authenticatedData, 0, authenticatedLength); 595 596 furtherOffset = 0; 597 } else { 598 /* 599 * No authenticated data at the beginning. Just skip the 600 * required number of bytes to the beginning of the stream. 601 */ 602 if (encStart > 0) { 603 furtherOffset = encStart; 604 } else { 605 furtherOffset = 0; 606 } 607 } 608 609 /* 610 * If there is data at the end of the stream we want to ignore, 611 * wrap this in a LimitedLengthInputStream. 612 */ 613 if (furtherOffset >= 0 && end > furtherOffset) { 614 inStream = new LimitedLengthInputStream(inStream, furtherOffset, end - encStart); 615 } else if (furtherOffset > 0) { 616 inStream.skip(furtherOffset); 617 } 618 619 mAuthenticatedStream = new MacAuthenticatedInputStream(inStream, mac); 620 621 inStream = mAuthenticatedStream; 622 } else { 623 if (encStart >= 0) { 624 if (end > encStart) { 625 inStream = new LimitedLengthInputStream(inStream, encStart, end - encStart); 626 } else { 627 inStream.skip(encStart); 628 } 629 } 630 } 631 632 return new CipherInputStream(inStream, c); 633 } 634 635 } 636 637 private static final int PREFER_INTERNAL = 1; 638 private static final int PREFER_EXTERNAL = 2; 639 640 private int recommendAppInstallLocation(int installLocation, String archiveFilePath, int flags, 641 long threshold) { 642 int prefer; 643 boolean checkBoth = false; 644 645 final boolean isForwardLocked = (flags & PackageManager.INSTALL_FORWARD_LOCK) != 0; 646 647 check_inner : { 648 /* 649 * Explicit install flags should override the manifest settings. 650 */ 651 if ((flags & PackageManager.INSTALL_INTERNAL) != 0) { 652 prefer = PREFER_INTERNAL; 653 break check_inner; 654 } else if ((flags & PackageManager.INSTALL_EXTERNAL) != 0) { 655 prefer = PREFER_EXTERNAL; 656 break check_inner; 657 } 658 659 /* No install flags. Check for manifest option. */ 660 if (installLocation == PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY) { 661 prefer = PREFER_INTERNAL; 662 break check_inner; 663 } else if (installLocation == PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL) { 664 prefer = PREFER_EXTERNAL; 665 checkBoth = true; 666 break check_inner; 667 } else if (installLocation == PackageInfo.INSTALL_LOCATION_AUTO) { 668 // We default to preferring internal storage. 669 prefer = PREFER_INTERNAL; 670 checkBoth = true; 671 break check_inner; 672 } 673 674 // Pick user preference 675 int installPreference = Settings.Global.getInt(getApplicationContext() 676 .getContentResolver(), 677 Settings.Global.DEFAULT_INSTALL_LOCATION, 678 PackageHelper.APP_INSTALL_AUTO); 679 if (installPreference == PackageHelper.APP_INSTALL_INTERNAL) { 680 prefer = PREFER_INTERNAL; 681 break check_inner; 682 } else if (installPreference == PackageHelper.APP_INSTALL_EXTERNAL) { 683 prefer = PREFER_EXTERNAL; 684 break check_inner; 685 } 686 687 /* 688 * Fall back to default policy of internal-only if nothing else is 689 * specified. 690 */ 691 prefer = PREFER_INTERNAL; 692 } 693 694 final boolean emulated = Environment.isExternalStorageEmulated(); 695 696 final File apkFile = new File(archiveFilePath); 697 698 boolean fitsOnInternal = false; 699 if (checkBoth || prefer == PREFER_INTERNAL) { 700 try { 701 fitsOnInternal = isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 702 } catch (IOException e) { 703 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 704 } 705 } 706 707 boolean fitsOnSd = false; 708 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL)) { 709 try { 710 fitsOnSd = isUnderExternalThreshold(apkFile, isForwardLocked); 711 } catch (IOException e) { 712 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 713 } 714 } 715 716 if (prefer == PREFER_INTERNAL) { 717 if (fitsOnInternal) { 718 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 719 } 720 } else if (!emulated && prefer == PREFER_EXTERNAL) { 721 if (fitsOnSd) { 722 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 723 } 724 } 725 726 if (checkBoth) { 727 if (fitsOnInternal) { 728 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 729 } else if (!emulated && fitsOnSd) { 730 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 731 } 732 } 733 734 /* 735 * If they requested to be on the external media by default, return that 736 * the media was unavailable. Otherwise, indicate there was insufficient 737 * storage space available. 738 */ 739 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL) 740 && !Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 741 return PackageHelper.RECOMMEND_MEDIA_UNAVAILABLE; 742 } else { 743 return PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE; 744 } 745 } 746 747 /** 748 * Measure a file to see if it fits within the free space threshold. 749 * 750 * @param apkFile file to check 751 * @param threshold byte threshold to compare against 752 * @return true if file fits under threshold 753 * @throws FileNotFoundException when APK does not exist 754 */ 755 private boolean isUnderInternalThreshold(File apkFile, boolean isForwardLocked, long threshold) 756 throws IOException { 757 long size = apkFile.length(); 758 if (size == 0 && !apkFile.exists()) { 759 throw new FileNotFoundException(); 760 } 761 762 if (isForwardLocked) { 763 size += PackageHelper.extractPublicFiles(apkFile.getAbsolutePath(), null); 764 } 765 766 final StatFs internalStats = new StatFs(Environment.getDataDirectory().getPath()); 767 final long availInternalSize = (long) internalStats.getAvailableBlocks() 768 * (long) internalStats.getBlockSize(); 769 770 return (availInternalSize - size) > threshold; 771 } 772 773 774 /** 775 * Measure a file to see if it fits in the external free space. 776 * 777 * @param apkFile file to check 778 * @return true if file fits 779 * @throws IOException when file does not exist 780 */ 781 private boolean isUnderExternalThreshold(File apkFile, boolean isForwardLocked) 782 throws IOException { 783 if (Environment.isExternalStorageEmulated()) { 784 return false; 785 } 786 787 final int sizeMb = calculateContainerSize(apkFile, isForwardLocked); 788 789 final int availSdMb; 790 if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 791 final StatFs sdStats = new StatFs(Environment.getExternalStorageDirectory().getPath()); 792 final int blocksToMb = (1 << 20) / sdStats.getBlockSize(); 793 availSdMb = sdStats.getAvailableBlocks() * blocksToMb; 794 } else { 795 availSdMb = -1; 796 } 797 798 return availSdMb > sizeMb; 799 } 800 801 /** 802 * Calculate the container size for an APK. Takes into account the 803 * 804 * @param apkFile file from which to calculate size 805 * @return size in megabytes (2^20 bytes) 806 * @throws IOException when there is a problem reading the file 807 */ 808 private int calculateContainerSize(File apkFile, boolean forwardLocked) throws IOException { 809 // Calculate size of container needed to hold base APK. 810 long sizeBytes = apkFile.length(); 811 if (sizeBytes == 0 && !apkFile.exists()) { 812 throw new FileNotFoundException(); 813 } 814 815 // Check all the native files that need to be copied and add that to the 816 // container size. 817 sizeBytes += NativeLibraryHelper.sumNativeBinariesLI(apkFile); 818 819 if (forwardLocked) { 820 sizeBytes += PackageHelper.extractPublicFiles(apkFile.getPath(), null); 821 } 822 823 int sizeMb = (int) (sizeBytes >> 20); 824 if ((sizeBytes - (sizeMb * 1024 * 1024)) > 0) { 825 sizeMb++; 826 } 827 828 /* 829 * Add buffer size because we don't have a good way to determine the 830 * real FAT size. Your FAT size varies with how many directory entries 831 * you need, how big the whole filesystem is, and other such headaches. 832 */ 833 sizeMb++; 834 835 return sizeMb; 836 } 837} 838