DefaultContainerService.java revision 103d53005e7a3c2735f4ac76fa9b795a7e7e39d7
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.PackageInfo; 30import android.content.pm.PackageInfoLite; 31import android.content.pm.PackageManager; 32import android.content.pm.PackageParser; 33import android.content.res.ObbInfo; 34import android.content.res.ObbScanner; 35import android.net.Uri; 36import android.os.Environment; 37import android.os.FileUtils; 38import android.os.IBinder; 39import android.os.ParcelFileDescriptor; 40import android.os.Process; 41import android.os.RemoteException; 42import android.os.ServiceManager; 43import android.os.StatFs; 44import android.provider.Settings; 45import android.util.DisplayMetrics; 46import android.util.Slog; 47 48import java.io.BufferedInputStream; 49import java.io.File; 50import java.io.FileInputStream; 51import java.io.FileNotFoundException; 52import java.io.IOException; 53import java.io.InputStream; 54import java.io.OutputStream; 55import java.security.DigestException; 56import java.security.GeneralSecurityException; 57import java.security.InvalidAlgorithmParameterException; 58import java.security.InvalidKeyException; 59import java.security.NoSuchAlgorithmException; 60 61import javax.crypto.Cipher; 62import javax.crypto.CipherInputStream; 63import javax.crypto.Mac; 64import javax.crypto.NoSuchPaddingException; 65 66import libcore.io.ErrnoException; 67import libcore.io.IoUtils; 68import libcore.io.Libcore; 69import libcore.io.Streams; 70import libcore.io.StructStatFs; 71 72/* 73 * This service copies a downloaded apk to a file passed in as 74 * a ParcelFileDescriptor or to a newly created container specified 75 * by parameters. The DownloadManager gives access to this process 76 * based on its uid. This process also needs the ACCESS_DOWNLOAD_MANAGER 77 * permission to access apks downloaded via the download manager. 78 */ 79public class DefaultContainerService extends IntentService { 80 private static final String TAG = "DefContainer"; 81 private static final boolean localLOGV = true; 82 83 private static final String LIB_DIR_NAME = "lib"; 84 85 private IMediaContainerService.Stub mBinder = new IMediaContainerService.Stub() { 86 /** 87 * Creates a new container and copies resource there. 88 * @param paackageURI the uri of resource to be copied. Can be either 89 * a content uri or a file uri 90 * @param cid the id of the secure container that should 91 * be used for creating a secure container into which the resource 92 * will be copied. 93 * @param key Refers to key used for encrypting the secure container 94 * @param resFileName Name of the target resource file(relative to newly 95 * created secure container) 96 * @return Returns the new cache path where the resource has been copied into 97 * 98 */ 99 public String copyResourceToContainer(final Uri packageURI, final String cid, 100 final String key, final String resFileName, final String publicResFileName, 101 boolean isExternal, boolean isForwardLocked) { 102 if (packageURI == null || cid == null) { 103 return null; 104 } 105 106 return copyResourceInner(packageURI, cid, key, resFileName, publicResFileName, 107 isExternal, isForwardLocked); 108 } 109 110 /** 111 * Copy specified resource to output stream 112 * 113 * @param packageURI the uri of resource to be copied. Should be a file 114 * uri 115 * @param encryptionParams parameters describing the encryption used for 116 * this file 117 * @param outStream Remote file descriptor to be used for copying 118 * @return returns status code according to those in 119 * {@link PackageManager} 120 */ 121 public int copyResource(final Uri packageURI, ContainerEncryptionParams encryptionParams, 122 ParcelFileDescriptor outStream) { 123 if (packageURI == null || outStream == null) { 124 return PackageManager.INSTALL_FAILED_INVALID_URI; 125 } 126 127 ParcelFileDescriptor.AutoCloseOutputStream autoOut 128 = new ParcelFileDescriptor.AutoCloseOutputStream(outStream); 129 130 try { 131 copyFile(packageURI, autoOut, encryptionParams); 132 return PackageManager.INSTALL_SUCCEEDED; 133 } catch (FileNotFoundException e) { 134 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " FNF: " 135 + e.getMessage()); 136 return PackageManager.INSTALL_FAILED_INVALID_URI; 137 } catch (IOException e) { 138 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " IO: " 139 + e.getMessage()); 140 return PackageManager.INSTALL_FAILED_INSUFFICIENT_STORAGE; 141 } catch (DigestException e) { 142 Slog.e(TAG, "Could not copy URI " + packageURI.toString() + " Security: " 143 + e.getMessage()); 144 return PackageManager.INSTALL_FAILED_INVALID_APK; 145 } 146 } 147 148 /** 149 * Determine the recommended install location for package 150 * specified by file uri location. 151 * @param fileUri the uri of resource to be copied. Should be a 152 * file uri 153 * @return Returns PackageInfoLite object containing 154 * the package info and recommended app location. 155 */ 156 public PackageInfoLite getMinimalPackageInfo(final String packagePath, int flags, 157 long threshold) { 158 PackageInfoLite ret = new PackageInfoLite(); 159 160 if (packagePath == null) { 161 Slog.i(TAG, "Invalid package file " + packagePath); 162 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 163 return ret; 164 } 165 166 DisplayMetrics metrics = new DisplayMetrics(); 167 metrics.setToDefaults(); 168 169 PackageParser.PackageLite pkg = PackageParser.parsePackageLite(packagePath, 0); 170 if (pkg == null) { 171 Slog.w(TAG, "Failed to parse package"); 172 173 final File apkFile = new File(packagePath); 174 if (!apkFile.exists()) { 175 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_URI; 176 } else { 177 ret.recommendedInstallLocation = PackageHelper.RECOMMEND_FAILED_INVALID_APK; 178 } 179 180 return ret; 181 } 182 183 ret.packageName = pkg.packageName; 184 ret.installLocation = pkg.installLocation; 185 ret.verifiers = pkg.verifiers; 186 187 ret.recommendedInstallLocation = recommendAppInstallLocation(pkg.installLocation, 188 packagePath, flags, threshold); 189 190 return ret; 191 } 192 193 @Override 194 public boolean checkInternalFreeStorage(Uri packageUri, boolean isForwardLocked, 195 long threshold) throws RemoteException { 196 final File apkFile = new File(packageUri.getPath()); 197 try { 198 return isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 199 } catch (IOException e) { 200 return true; 201 } 202 } 203 204 @Override 205 public boolean checkExternalFreeStorage(Uri packageUri, boolean isForwardLocked) 206 throws RemoteException { 207 final File apkFile = new File(packageUri.getPath()); 208 try { 209 return isUnderExternalThreshold(apkFile, isForwardLocked); 210 } catch (IOException e) { 211 return true; 212 } 213 } 214 215 public ObbInfo getObbInfo(String filename) { 216 try { 217 return ObbScanner.getObbInfo(filename); 218 } catch (IOException e) { 219 Slog.d(TAG, "Couldn't get OBB info for " + filename); 220 return null; 221 } 222 } 223 224 @Override 225 public long calculateDirectorySize(String path) throws RemoteException { 226 final File directory = new File(path); 227 if (directory.exists() && directory.isDirectory()) { 228 return MeasurementUtils.measureDirectory(path); 229 } else { 230 return 0L; 231 } 232 } 233 234 @Override 235 public long[] getFileSystemStats(String path) { 236 try { 237 final StructStatFs stat = Libcore.os.statfs(path); 238 final long totalSize = stat.f_blocks * stat.f_bsize; 239 final long availSize = stat.f_bavail * stat.f_bsize; 240 return new long[] { totalSize, availSize }; 241 } catch (ErrnoException e) { 242 throw new IllegalStateException(e); 243 } 244 } 245 }; 246 247 public DefaultContainerService() { 248 super("DefaultContainerService"); 249 setIntentRedelivery(true); 250 } 251 252 @Override 253 protected void onHandleIntent(Intent intent) { 254 if (PackageManager.ACTION_CLEAN_EXTERNAL_STORAGE.equals(intent.getAction())) { 255 IPackageManager pm = IPackageManager.Stub.asInterface( 256 ServiceManager.getService("package")); 257 String pkg = null; 258 try { 259 while ((pkg=pm.nextPackageToClean(pkg)) != null) { 260 eraseFiles(Environment.getExternalStorageAppDataDirectory(pkg)); 261 eraseFiles(Environment.getExternalStorageAppMediaDirectory(pkg)); 262 eraseFiles(Environment.getExternalStorageAppObbDirectory(pkg)); 263 } 264 } catch (RemoteException e) { 265 } 266 } 267 } 268 269 void eraseFiles(File path) { 270 if (path.isDirectory()) { 271 String[] files = path.list(); 272 if (files != null) { 273 for (String file : files) { 274 eraseFiles(new File(path, file)); 275 } 276 } 277 } 278 path.delete(); 279 } 280 281 public IBinder onBind(Intent intent) { 282 return mBinder; 283 } 284 285 private String copyResourceInner(Uri packageURI, String newCid, String key, String resFileName, 286 String publicResFileName, boolean isExternal, boolean isForwardLocked) { 287 288 if (isExternal) { 289 // Make sure the sdcard is mounted. 290 String status = Environment.getExternalStorageState(); 291 if (!status.equals(Environment.MEDIA_MOUNTED)) { 292 Slog.w(TAG, "Make sure sdcard is mounted."); 293 return null; 294 } 295 } 296 297 // The .apk file 298 String codePath = packageURI.getPath(); 299 File codeFile = new File(codePath); 300 301 // Calculate size of container needed to hold base APK. 302 final int sizeMb; 303 try { 304 sizeMb = calculateContainerSize(codeFile, isForwardLocked); 305 } catch (IOException e) { 306 Slog.w(TAG, "Problem when trying to copy " + codeFile.getPath()); 307 return null; 308 } 309 310 // Create new container 311 final String newCachePath = PackageHelper.createSdDir(sizeMb, newCid, key, Process.myUid(), 312 isExternal); 313 if (newCachePath == null) { 314 Slog.e(TAG, "Failed to create container " + newCid); 315 return null; 316 } 317 318 if (localLOGV) { 319 Slog.i(TAG, "Created container for " + newCid + " at path : " + newCachePath); 320 } 321 322 final File resFile = new File(newCachePath, resFileName); 323 if (FileUtils.copyFile(new File(codePath), resFile)) { 324 if (localLOGV) { 325 Slog.i(TAG, "Copied " + codePath + " to " + resFile); 326 } 327 } else { 328 Slog.e(TAG, "Failed to copy " + codePath + " to " + resFile); 329 // Clean up container 330 PackageHelper.destroySdDir(newCid); 331 return null; 332 } 333 334 try { 335 Libcore.os.chmod(resFile.getAbsolutePath(), 0640); 336 } catch (ErrnoException e) { 337 Slog.e(TAG, "Could not chown APK: " + e.getMessage()); 338 PackageHelper.destroySdDir(newCid); 339 return null; 340 } 341 342 if (isForwardLocked) { 343 File publicZipFile = new File(newCachePath, publicResFileName); 344 try { 345 PackageHelper.extractPublicFiles(resFile.getAbsolutePath(), publicZipFile); 346 if (localLOGV) { 347 Slog.i(TAG, "Copied resources to " + publicZipFile); 348 } 349 } catch (IOException e) { 350 Slog.e(TAG, "Could not chown public APK " + publicZipFile.getAbsolutePath() + ": " 351 + e.getMessage()); 352 PackageHelper.destroySdDir(newCid); 353 return null; 354 } 355 356 try { 357 Libcore.os.chmod(publicZipFile.getAbsolutePath(), 0644); 358 } catch (ErrnoException e) { 359 Slog.e(TAG, "Could not chown public resource file: " + e.getMessage()); 360 PackageHelper.destroySdDir(newCid); 361 return null; 362 } 363 } 364 365 final File sharedLibraryDir = new File(newCachePath, LIB_DIR_NAME); 366 if (sharedLibraryDir.mkdir()) { 367 int ret = NativeLibraryHelper.copyNativeBinariesIfNeededLI(codeFile, sharedLibraryDir); 368 if (ret != PackageManager.INSTALL_SUCCEEDED) { 369 Slog.e(TAG, "Could not copy native libraries to " + sharedLibraryDir.getPath()); 370 PackageHelper.destroySdDir(newCid); 371 return null; 372 } 373 } else { 374 Slog.e(TAG, "Could not create native lib directory: " + sharedLibraryDir.getPath()); 375 PackageHelper.destroySdDir(newCid); 376 return null; 377 } 378 379 if (!PackageHelper.finalizeSdDir(newCid)) { 380 Slog.e(TAG, "Failed to finalize " + newCid + " at path " + newCachePath); 381 // Clean up container 382 PackageHelper.destroySdDir(newCid); 383 return null; 384 } 385 386 if (localLOGV) { 387 Slog.i(TAG, "Finalized container " + newCid); 388 } 389 390 if (PackageHelper.isContainerMounted(newCid)) { 391 if (localLOGV) { 392 Slog.i(TAG, "Unmounting " + newCid + " at path " + newCachePath); 393 } 394 395 // Force a gc to avoid being killed. 396 Runtime.getRuntime().gc(); 397 PackageHelper.unMountSdDir(newCid); 398 } else { 399 if (localLOGV) { 400 Slog.i(TAG, "Container " + newCid + " not mounted"); 401 } 402 } 403 404 return newCachePath; 405 } 406 407 private static void copyToFile(InputStream inputStream, OutputStream out) throws IOException { 408 byte[] buffer = new byte[16384]; 409 int bytesRead; 410 while ((bytesRead = inputStream.read(buffer)) >= 0) { 411 out.write(buffer, 0, bytesRead); 412 } 413 } 414 415 private void copyFile(Uri pPackageURI, OutputStream outStream, 416 ContainerEncryptionParams encryptionParams) throws FileNotFoundException, IOException, 417 DigestException { 418 String scheme = pPackageURI.getScheme(); 419 InputStream inStream = null; 420 try { 421 if (scheme == null || scheme.equals("file")) { 422 final InputStream is = new FileInputStream(new File(pPackageURI.getPath())); 423 inStream = new BufferedInputStream(is); 424 } else if (scheme.equals("content")) { 425 final ParcelFileDescriptor fd; 426 try { 427 fd = getContentResolver().openFileDescriptor(pPackageURI, "r"); 428 } catch (FileNotFoundException e) { 429 Slog.e(TAG, "Couldn't open file descriptor from download service. " 430 + "Failed with exception " + e); 431 throw e; 432 } 433 434 if (fd == null) { 435 Slog.e(TAG, "Provider returned no file descriptor for " + 436 pPackageURI.toString()); 437 throw new FileNotFoundException("provider returned no file descriptor"); 438 } else { 439 if (localLOGV) { 440 Slog.i(TAG, "Opened file descriptor from download service."); 441 } 442 inStream = new ParcelFileDescriptor.AutoCloseInputStream(fd); 443 } 444 } else { 445 Slog.e(TAG, "Package URI is not 'file:' or 'content:' - " + pPackageURI); 446 throw new FileNotFoundException("Package URI is not 'file:' or 'content:'"); 447 } 448 449 /* 450 * If this resource is encrypted, get the decrypted stream version 451 * of it. 452 */ 453 ApkContainer container = new ApkContainer(inStream, encryptionParams); 454 455 try { 456 /* 457 * We copy the source package file to a temp file and then 458 * rename it to the destination file in order to eliminate a 459 * window where the package directory scanner notices the new 460 * package file but it's not completely copied yet. 461 */ 462 copyToFile(container.getInputStream(), outStream); 463 464 if (!container.isAuthenticated()) { 465 throw new DigestException(); 466 } 467 } catch (GeneralSecurityException e) { 468 throw new DigestException("A problem occured copying the file."); 469 } 470 } finally { 471 IoUtils.closeQuietly(inStream); 472 } 473 } 474 475 private static class ApkContainer { 476 private static final int MAX_AUTHENTICATED_DATA_SIZE = 16384; 477 478 private final InputStream mInStream; 479 480 private MacAuthenticatedInputStream mAuthenticatedStream; 481 482 private byte[] mTag; 483 484 public ApkContainer(InputStream inStream, ContainerEncryptionParams encryptionParams) 485 throws IOException { 486 if (encryptionParams == null) { 487 mInStream = inStream; 488 } else { 489 mInStream = getDecryptedStream(inStream, encryptionParams); 490 mTag = encryptionParams.getMacTag(); 491 } 492 } 493 494 public boolean isAuthenticated() { 495 if (mAuthenticatedStream == null) { 496 return true; 497 } 498 499 return mAuthenticatedStream.isTagEqual(mTag); 500 } 501 502 private Mac getMacInstance(ContainerEncryptionParams encryptionParams) throws IOException { 503 final Mac m; 504 try { 505 final String macAlgo = encryptionParams.getMacAlgorithm(); 506 507 if (macAlgo != null) { 508 m = Mac.getInstance(macAlgo); 509 m.init(encryptionParams.getMacKey(), encryptionParams.getMacSpec()); 510 } else { 511 m = null; 512 } 513 514 return m; 515 } catch (NoSuchAlgorithmException e) { 516 throw new IOException(e); 517 } catch (InvalidKeyException e) { 518 throw new IOException(e); 519 } catch (InvalidAlgorithmParameterException e) { 520 throw new IOException(e); 521 } 522 } 523 524 public InputStream getInputStream() { 525 return mInStream; 526 } 527 528 private InputStream getDecryptedStream(InputStream inStream, 529 ContainerEncryptionParams encryptionParams) throws IOException { 530 final Cipher c; 531 try { 532 c = Cipher.getInstance(encryptionParams.getEncryptionAlgorithm()); 533 c.init(Cipher.DECRYPT_MODE, encryptionParams.getEncryptionKey(), 534 encryptionParams.getEncryptionSpec()); 535 } catch (NoSuchAlgorithmException e) { 536 throw new IOException(e); 537 } catch (NoSuchPaddingException e) { 538 throw new IOException(e); 539 } catch (InvalidKeyException e) { 540 throw new IOException(e); 541 } catch (InvalidAlgorithmParameterException e) { 542 throw new IOException(e); 543 } 544 545 final long encStart = encryptionParams.getEncryptedDataStart(); 546 final long end = encryptionParams.getDataEnd(); 547 if (end < encStart) { 548 throw new IOException("end <= encStart"); 549 } 550 551 final Mac mac = getMacInstance(encryptionParams); 552 if (mac != null) { 553 final long macStart = encryptionParams.getAuthenticatedDataStart(); 554 if (macStart >= Integer.MAX_VALUE) { 555 throw new IOException("macStart >= Integer.MAX_VALUE"); 556 } 557 558 final long furtherOffset; 559 if (macStart >= 0 && encStart >= 0 && macStart < encStart) { 560 /* 561 * If there is authenticated data at the beginning, read 562 * that into our MAC first. 563 */ 564 final long authenticatedLengthLong = encStart - macStart; 565 if (authenticatedLengthLong > MAX_AUTHENTICATED_DATA_SIZE) { 566 throw new IOException("authenticated data is too long"); 567 } 568 final int authenticatedLength = (int) authenticatedLengthLong; 569 570 final byte[] authenticatedData = new byte[(int) authenticatedLength]; 571 572 Streams.readFully(inStream, authenticatedData, (int) macStart, 573 authenticatedLength); 574 mac.update(authenticatedData, 0, authenticatedLength); 575 576 furtherOffset = 0; 577 } else { 578 /* 579 * No authenticated data at the beginning. Just skip the 580 * required number of bytes to the beginning of the stream. 581 */ 582 if (encStart > 0) { 583 furtherOffset = encStart; 584 } else { 585 furtherOffset = 0; 586 } 587 } 588 589 /* 590 * If there is data at the end of the stream we want to ignore, 591 * wrap this in a LimitedLengthInputStream. 592 */ 593 if (furtherOffset >= 0 && end > furtherOffset) { 594 inStream = new LimitedLengthInputStream(inStream, furtherOffset, end - encStart); 595 } else if (furtherOffset > 0) { 596 inStream.skip(furtherOffset); 597 } 598 599 mAuthenticatedStream = new MacAuthenticatedInputStream(inStream, mac); 600 601 inStream = mAuthenticatedStream; 602 } else { 603 if (encStart >= 0) { 604 if (end > encStart) { 605 inStream = new LimitedLengthInputStream(inStream, encStart, end - encStart); 606 } else { 607 inStream.skip(encStart); 608 } 609 } 610 } 611 612 return new CipherInputStream(inStream, c); 613 } 614 615 } 616 617 private static final int PREFER_INTERNAL = 1; 618 private static final int PREFER_EXTERNAL = 2; 619 620 private int recommendAppInstallLocation(int installLocation, String archiveFilePath, int flags, 621 long threshold) { 622 int prefer; 623 boolean checkBoth = false; 624 625 final boolean isForwardLocked = (flags & PackageManager.INSTALL_FORWARD_LOCK) != 0; 626 627 check_inner : { 628 /* 629 * Explicit install flags should override the manifest settings. 630 */ 631 if ((flags & PackageManager.INSTALL_INTERNAL) != 0) { 632 prefer = PREFER_INTERNAL; 633 break check_inner; 634 } else if ((flags & PackageManager.INSTALL_EXTERNAL) != 0) { 635 prefer = PREFER_EXTERNAL; 636 break check_inner; 637 } 638 639 /* No install flags. Check for manifest option. */ 640 if (installLocation == PackageInfo.INSTALL_LOCATION_INTERNAL_ONLY) { 641 prefer = PREFER_INTERNAL; 642 break check_inner; 643 } else if (installLocation == PackageInfo.INSTALL_LOCATION_PREFER_EXTERNAL) { 644 prefer = PREFER_EXTERNAL; 645 checkBoth = true; 646 break check_inner; 647 } else if (installLocation == PackageInfo.INSTALL_LOCATION_AUTO) { 648 // We default to preferring internal storage. 649 prefer = PREFER_INTERNAL; 650 checkBoth = true; 651 break check_inner; 652 } 653 654 // Pick user preference 655 int installPreference = Settings.System.getInt(getApplicationContext() 656 .getContentResolver(), 657 Settings.Secure.DEFAULT_INSTALL_LOCATION, 658 PackageHelper.APP_INSTALL_AUTO); 659 if (installPreference == PackageHelper.APP_INSTALL_INTERNAL) { 660 prefer = PREFER_INTERNAL; 661 break check_inner; 662 } else if (installPreference == PackageHelper.APP_INSTALL_EXTERNAL) { 663 prefer = PREFER_EXTERNAL; 664 break check_inner; 665 } 666 667 /* 668 * Fall back to default policy of internal-only if nothing else is 669 * specified. 670 */ 671 prefer = PREFER_INTERNAL; 672 } 673 674 final boolean emulated = Environment.isExternalStorageEmulated(); 675 676 final File apkFile = new File(archiveFilePath); 677 678 boolean fitsOnInternal = false; 679 if (checkBoth || prefer == PREFER_INTERNAL) { 680 try { 681 fitsOnInternal = isUnderInternalThreshold(apkFile, isForwardLocked, threshold); 682 } catch (IOException e) { 683 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 684 } 685 } 686 687 boolean fitsOnSd = false; 688 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL)) { 689 try { 690 fitsOnSd = isUnderExternalThreshold(apkFile, isForwardLocked); 691 } catch (IOException e) { 692 return PackageHelper.RECOMMEND_FAILED_INVALID_URI; 693 } 694 } 695 696 if (prefer == PREFER_INTERNAL) { 697 if (fitsOnInternal) { 698 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 699 } 700 } else if (!emulated && prefer == PREFER_EXTERNAL) { 701 if (fitsOnSd) { 702 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 703 } 704 } 705 706 if (checkBoth) { 707 if (fitsOnInternal) { 708 return PackageHelper.RECOMMEND_INSTALL_INTERNAL; 709 } else if (!emulated && fitsOnSd) { 710 return PackageHelper.RECOMMEND_INSTALL_EXTERNAL; 711 } 712 } 713 714 /* 715 * If they requested to be on the external media by default, return that 716 * the media was unavailable. Otherwise, indicate there was insufficient 717 * storage space available. 718 */ 719 if (!emulated && (checkBoth || prefer == PREFER_EXTERNAL) 720 && !Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 721 return PackageHelper.RECOMMEND_MEDIA_UNAVAILABLE; 722 } else { 723 return PackageHelper.RECOMMEND_FAILED_INSUFFICIENT_STORAGE; 724 } 725 } 726 727 /** 728 * Measure a file to see if it fits within the free space threshold. 729 * 730 * @param apkFile file to check 731 * @param threshold byte threshold to compare against 732 * @return true if file fits under threshold 733 * @throws FileNotFoundException when APK does not exist 734 */ 735 private boolean isUnderInternalThreshold(File apkFile, boolean isForwardLocked, long threshold) 736 throws IOException { 737 long size = apkFile.length(); 738 if (size == 0 && !apkFile.exists()) { 739 throw new FileNotFoundException(); 740 } 741 742 if (isForwardLocked) { 743 size += PackageHelper.extractPublicFiles(apkFile.getAbsolutePath(), null); 744 } 745 746 final StatFs internalStats = new StatFs(Environment.getDataDirectory().getPath()); 747 final long availInternalSize = (long) internalStats.getAvailableBlocks() 748 * (long) internalStats.getBlockSize(); 749 750 return (availInternalSize - size) > threshold; 751 } 752 753 754 /** 755 * Measure a file to see if it fits in the external free space. 756 * 757 * @param apkFile file to check 758 * @return true if file fits 759 * @throws IOException when file does not exist 760 */ 761 private boolean isUnderExternalThreshold(File apkFile, boolean isForwardLocked) 762 throws IOException { 763 if (Environment.isExternalStorageEmulated()) { 764 return false; 765 } 766 767 final int sizeMb = calculateContainerSize(apkFile, isForwardLocked); 768 769 final int availSdMb; 770 if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) { 771 final StatFs sdStats = new StatFs(Environment.getExternalStorageDirectory().getPath()); 772 final int blocksToMb = (1 << 20) / sdStats.getBlockSize(); 773 availSdMb = sdStats.getAvailableBlocks() * blocksToMb; 774 } else { 775 availSdMb = -1; 776 } 777 778 return availSdMb > sizeMb; 779 } 780 781 /** 782 * Calculate the container size for an APK. Takes into account the 783 * 784 * @param apkFile file from which to calculate size 785 * @return size in megabytes (2^20 bytes) 786 * @throws IOException when there is a problem reading the file 787 */ 788 private int calculateContainerSize(File apkFile, boolean forwardLocked) throws IOException { 789 // Calculate size of container needed to hold base APK. 790 long sizeBytes = apkFile.length(); 791 if (sizeBytes == 0 && !apkFile.exists()) { 792 throw new FileNotFoundException(); 793 } 794 795 // Check all the native files that need to be copied and add that to the 796 // container size. 797 sizeBytes += NativeLibraryHelper.sumNativeBinariesLI(apkFile); 798 799 if (forwardLocked) { 800 sizeBytes += PackageHelper.extractPublicFiles(apkFile.getPath(), null); 801 } 802 803 int sizeMb = (int) (sizeBytes >> 20); 804 if ((sizeBytes - (sizeMb * 1024 * 1024)) > 0) { 805 sizeMb++; 806 } 807 808 /* 809 * Add buffer size because we don't have a good way to determine the 810 * real FAT size. Your FAT size varies with how many directory entries 811 * you need, how big the whole filesystem is, and other such headaches. 812 */ 813 sizeMb++; 814 815 return sizeMb; 816 } 817} 818