| /* |
| * Copyright (C) 2010 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.os; |
| |
| import android.annotation.SystemApi; |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.UserManager; |
| import android.text.TextUtils; |
| import android.util.Log; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileNotFoundException; |
| import java.io.FileReader; |
| import java.io.FileWriter; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.RandomAccessFile; |
| import java.security.GeneralSecurityException; |
| import java.security.PublicKey; |
| import java.security.Signature; |
| import java.security.SignatureException; |
| import java.security.cert.CertificateFactory; |
| import java.security.cert.X509Certificate; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| |
| import com.android.internal.logging.MetricsLogger; |
| |
| import sun.security.pkcs.PKCS7; |
| import sun.security.pkcs.SignerInfo; |
| |
| /** |
| * RecoverySystem contains methods for interacting with the Android |
| * recovery system (the separate partition that can be used to install |
| * system updates, wipe user data, etc.) |
| */ |
| public class RecoverySystem { |
| private static final String TAG = "RecoverySystem"; |
| |
| /** |
| * Default location of zip file containing public keys (X509 |
| * certs) authorized to sign OTA updates. |
| */ |
| private static final File DEFAULT_KEYSTORE = |
| new File("/system/etc/security/otacerts.zip"); |
| |
| /** Send progress to listeners no more often than this (in ms). */ |
| private static final long PUBLISH_PROGRESS_INTERVAL_MS = 500; |
| |
| /** Used to communicate with recovery. See bootable/recovery/recovery.cpp. */ |
| private static final File RECOVERY_DIR = new File("/cache/recovery"); |
| private static final File LOG_FILE = new File(RECOVERY_DIR, "log"); |
| private static final File LAST_INSTALL_FILE = new File(RECOVERY_DIR, "last_install"); |
| private static final String LAST_PREFIX = "last_"; |
| |
| /** |
| * The recovery image uses this file to identify the location (i.e. blocks) |
| * of an OTA package on the /data partition. The block map file is |
| * generated by uncrypt. |
| * |
| * @hide |
| */ |
| public static final File BLOCK_MAP_FILE = new File(RECOVERY_DIR, "block.map"); |
| |
| /** |
| * UNCRYPT_PACKAGE_FILE stores the filename to be uncrypt'd, which will be |
| * read by uncrypt. |
| * |
| * @hide |
| */ |
| public static final File UNCRYPT_PACKAGE_FILE = new File(RECOVERY_DIR, "uncrypt_file"); |
| |
| // Length limits for reading files. |
| private static final int LOG_FILE_MAX_LENGTH = 64 * 1024; |
| |
| // Prevent concurrent execution of requests. |
| private static final Object sRequestLock = new Object(); |
| |
| private final IRecoverySystem mService; |
| |
| /** |
| * Interface definition for a callback to be invoked regularly as |
| * verification proceeds. |
| */ |
| public interface ProgressListener { |
| /** |
| * Called periodically as the verification progresses. |
| * |
| * @param progress the approximate percentage of the |
| * verification that has been completed, ranging from 0 |
| * to 100 (inclusive). |
| */ |
| public void onProgress(int progress); |
| } |
| |
| /** @return the set of certs that can be used to sign an OTA package. */ |
| private static HashSet<X509Certificate> getTrustedCerts(File keystore) |
| throws IOException, GeneralSecurityException { |
| HashSet<X509Certificate> trusted = new HashSet<X509Certificate>(); |
| if (keystore == null) { |
| keystore = DEFAULT_KEYSTORE; |
| } |
| ZipFile zip = new ZipFile(keystore); |
| try { |
| CertificateFactory cf = CertificateFactory.getInstance("X.509"); |
| Enumeration<? extends ZipEntry> entries = zip.entries(); |
| while (entries.hasMoreElements()) { |
| ZipEntry entry = entries.nextElement(); |
| InputStream is = zip.getInputStream(entry); |
| try { |
| trusted.add((X509Certificate) cf.generateCertificate(is)); |
| } finally { |
| is.close(); |
| } |
| } |
| } finally { |
| zip.close(); |
| } |
| return trusted; |
| } |
| |
| /** |
| * Verify the cryptographic signature of a system update package |
| * before installing it. Note that the package is also verified |
| * separately by the installer once the device is rebooted into |
| * the recovery system. This function will return only if the |
| * package was successfully verified; otherwise it will throw an |
| * exception. |
| * |
| * Verification of a package can take significant time, so this |
| * function should not be called from a UI thread. Interrupting |
| * the thread while this function is in progress will result in a |
| * SecurityException being thrown (and the thread's interrupt flag |
| * will be cleared). |
| * |
| * @param packageFile the package to be verified |
| * @param listener an object to receive periodic progress |
| * updates as verification proceeds. May be null. |
| * @param deviceCertsZipFile the zip file of certificates whose |
| * public keys we will accept. Verification succeeds if the |
| * package is signed by the private key corresponding to any |
| * public key in this file. May be null to use the system default |
| * file (currently "/system/etc/security/otacerts.zip"). |
| * |
| * @throws IOException if there were any errors reading the |
| * package or certs files. |
| * @throws GeneralSecurityException if verification failed |
| */ |
| public static void verifyPackage(File packageFile, |
| ProgressListener listener, |
| File deviceCertsZipFile) |
| throws IOException, GeneralSecurityException { |
| final long fileLen = packageFile.length(); |
| |
| final RandomAccessFile raf = new RandomAccessFile(packageFile, "r"); |
| try { |
| final long startTimeMillis = System.currentTimeMillis(); |
| if (listener != null) { |
| listener.onProgress(0); |
| } |
| |
| raf.seek(fileLen - 6); |
| byte[] footer = new byte[6]; |
| raf.readFully(footer); |
| |
| if (footer[2] != (byte)0xff || footer[3] != (byte)0xff) { |
| throw new SignatureException("no signature in file (no footer)"); |
| } |
| |
| final int commentSize = (footer[4] & 0xff) | ((footer[5] & 0xff) << 8); |
| final int signatureStart = (footer[0] & 0xff) | ((footer[1] & 0xff) << 8); |
| |
| byte[] eocd = new byte[commentSize + 22]; |
| raf.seek(fileLen - (commentSize + 22)); |
| raf.readFully(eocd); |
| |
| // Check that we have found the start of the |
| // end-of-central-directory record. |
| if (eocd[0] != (byte)0x50 || eocd[1] != (byte)0x4b || |
| eocd[2] != (byte)0x05 || eocd[3] != (byte)0x06) { |
| throw new SignatureException("no signature in file (bad footer)"); |
| } |
| |
| for (int i = 4; i < eocd.length-3; ++i) { |
| if (eocd[i ] == (byte)0x50 && eocd[i+1] == (byte)0x4b && |
| eocd[i+2] == (byte)0x05 && eocd[i+3] == (byte)0x06) { |
| throw new SignatureException("EOCD marker found after start of EOCD"); |
| } |
| } |
| |
| // Parse the signature |
| PKCS7 block = |
| new PKCS7(new ByteArrayInputStream(eocd, commentSize+22-signatureStart, signatureStart)); |
| |
| // Take the first certificate from the signature (packages |
| // should contain only one). |
| X509Certificate[] certificates = block.getCertificates(); |
| if (certificates == null || certificates.length == 0) { |
| throw new SignatureException("signature contains no certificates"); |
| } |
| X509Certificate cert = certificates[0]; |
| PublicKey signatureKey = cert.getPublicKey(); |
| |
| SignerInfo[] signerInfos = block.getSignerInfos(); |
| if (signerInfos == null || signerInfos.length == 0) { |
| throw new SignatureException("signature contains no signedData"); |
| } |
| SignerInfo signerInfo = signerInfos[0]; |
| |
| // Check that the public key of the certificate contained |
| // in the package equals one of our trusted public keys. |
| boolean verified = false; |
| HashSet<X509Certificate> trusted = getTrustedCerts( |
| deviceCertsZipFile == null ? DEFAULT_KEYSTORE : deviceCertsZipFile); |
| for (X509Certificate c : trusted) { |
| if (c.getPublicKey().equals(signatureKey)) { |
| verified = true; |
| break; |
| } |
| } |
| if (!verified) { |
| throw new SignatureException("signature doesn't match any trusted key"); |
| } |
| |
| // The signature cert matches a trusted key. Now verify that |
| // the digest in the cert matches the actual file data. |
| raf.seek(0); |
| final ProgressListener listenerForInner = listener; |
| SignerInfo verifyResult = block.verify(signerInfo, new InputStream() { |
| // The signature covers all of the OTA package except the |
| // archive comment and its 2-byte length. |
| long toRead = fileLen - commentSize - 2; |
| long soFar = 0; |
| |
| int lastPercent = 0; |
| long lastPublishTime = startTimeMillis; |
| |
| @Override |
| public int read() throws IOException { |
| throw new UnsupportedOperationException(); |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| if (soFar >= toRead) { |
| return -1; |
| } |
| if (Thread.currentThread().isInterrupted()) { |
| return -1; |
| } |
| |
| int size = len; |
| if (soFar + size > toRead) { |
| size = (int)(toRead - soFar); |
| } |
| int read = raf.read(b, off, size); |
| soFar += read; |
| |
| if (listenerForInner != null) { |
| long now = System.currentTimeMillis(); |
| int p = (int)(soFar * 100 / toRead); |
| if (p > lastPercent && |
| now - lastPublishTime > PUBLISH_PROGRESS_INTERVAL_MS) { |
| lastPercent = p; |
| lastPublishTime = now; |
| listenerForInner.onProgress(lastPercent); |
| } |
| } |
| |
| return read; |
| } |
| }); |
| |
| final boolean interrupted = Thread.interrupted(); |
| if (listener != null) { |
| listener.onProgress(100); |
| } |
| |
| if (interrupted) { |
| throw new SignatureException("verification was interrupted"); |
| } |
| |
| if (verifyResult == null) { |
| throw new SignatureException("signature digest verification failed"); |
| } |
| } finally { |
| raf.close(); |
| } |
| } |
| |
| /** |
| * Process a given package with uncrypt. No-op if the package is not on the |
| * /data partition. |
| * |
| * @param Context the Context to use |
| * @param packageFile the package to be processed |
| * @param listener an object to receive periodic progress updates as |
| * processing proceeds. May be null. |
| * @param handler the Handler upon which the callbacks will be |
| * executed. |
| * |
| * @throws IOException if there were any errors processing the package file. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static void processPackage(Context context, |
| File packageFile, |
| final ProgressListener listener, |
| final Handler handler) |
| throws IOException { |
| String filename = packageFile.getCanonicalPath(); |
| if (!filename.startsWith("/data/")) { |
| return; |
| } |
| |
| RecoverySystem rs = (RecoverySystem) context.getSystemService(Context.RECOVERY_SERVICE); |
| IRecoverySystemProgressListener progressListener = null; |
| if (listener != null) { |
| final Handler progressHandler; |
| if (handler != null) { |
| progressHandler = handler; |
| } else { |
| progressHandler = new Handler(context.getMainLooper()); |
| } |
| progressListener = new IRecoverySystemProgressListener.Stub() { |
| int lastProgress = 0; |
| long lastPublishTime = System.currentTimeMillis(); |
| |
| @Override |
| public void onProgress(final int progress) { |
| final long now = System.currentTimeMillis(); |
| progressHandler.post(new Runnable() { |
| @Override |
| public void run() { |
| if (progress > lastProgress && |
| now - lastPublishTime > PUBLISH_PROGRESS_INTERVAL_MS) { |
| lastProgress = progress; |
| lastPublishTime = now; |
| listener.onProgress(progress); |
| } |
| } |
| }); |
| } |
| }; |
| } |
| |
| if (!rs.uncrypt(filename, progressListener)) { |
| throw new IOException("process package failed"); |
| } |
| } |
| |
| /** |
| * Process a given package with uncrypt. No-op if the package is not on the |
| * /data partition. |
| * |
| * @param Context the Context to use |
| * @param packageFile the package to be processed |
| * @param listener an object to receive periodic progress updates as |
| * processing proceeds. May be null. |
| * |
| * @throws IOException if there were any errors processing the package file. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static void processPackage(Context context, |
| File packageFile, |
| final ProgressListener listener) |
| throws IOException { |
| processPackage(context, packageFile, listener, null); |
| } |
| |
| /** |
| * Reboots the device in order to install the given update |
| * package. |
| * Requires the {@link android.Manifest.permission#REBOOT} permission. |
| * |
| * @param context the Context to use |
| * @param packageFile the update package to install. Must be on |
| * a partition mountable by recovery. (The set of partitions |
| * known to recovery may vary from device to device. Generally, |
| * /cache and /data are safe.) |
| * |
| * @throws IOException if writing the recovery command file |
| * fails, or if the reboot itself fails. |
| */ |
| public static void installPackage(Context context, File packageFile) |
| throws IOException { |
| installPackage(context, packageFile, false); |
| } |
| |
| /** |
| * If the package hasn't been processed (i.e. uncrypt'd), set up |
| * UNCRYPT_PACKAGE_FILE and delete BLOCK_MAP_FILE to trigger uncrypt during the |
| * reboot. |
| * |
| * @param context the Context to use |
| * @param packageFile the update package to install. Must be on a |
| * partition mountable by recovery. |
| * @param processed if the package has been processed (uncrypt'd). |
| * |
| * @throws IOException if writing the recovery command file fails, or if |
| * the reboot itself fails. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static void installPackage(Context context, File packageFile, boolean processed) |
| throws IOException { |
| synchronized (sRequestLock) { |
| LOG_FILE.delete(); |
| // Must delete the file in case it was created by system server. |
| UNCRYPT_PACKAGE_FILE.delete(); |
| |
| String filename = packageFile.getCanonicalPath(); |
| Log.w(TAG, "!!! REBOOTING TO INSTALL " + filename + " !!!"); |
| |
| // If the package name ends with "_s.zip", it's a security update. |
| boolean securityUpdate = filename.endsWith("_s.zip"); |
| |
| // If the package is on the /data partition, the package needs to |
| // be processed (i.e. uncrypt'd). The caller specifies if that has |
| // been done in 'processed' parameter. |
| if (filename.startsWith("/data/")) { |
| if (processed) { |
| if (!BLOCK_MAP_FILE.exists()) { |
| Log.e(TAG, "Package claimed to have been processed but failed to find " |
| + "the block map file."); |
| throw new IOException("Failed to find block map file"); |
| } |
| } else { |
| FileWriter uncryptFile = new FileWriter(UNCRYPT_PACKAGE_FILE); |
| try { |
| uncryptFile.write(filename + "\n"); |
| } finally { |
| uncryptFile.close(); |
| } |
| // UNCRYPT_PACKAGE_FILE needs to be readable and writable |
| // by system server. |
| if (!UNCRYPT_PACKAGE_FILE.setReadable(true, false) |
| || !UNCRYPT_PACKAGE_FILE.setWritable(true, false)) { |
| Log.e(TAG, "Error setting permission for " + UNCRYPT_PACKAGE_FILE); |
| } |
| |
| BLOCK_MAP_FILE.delete(); |
| } |
| |
| // If the package is on the /data partition, use the block map |
| // file as the package name instead. |
| filename = "@/cache/recovery/block.map"; |
| } |
| |
| final String filenameArg = "--update_package=" + filename + "\n"; |
| final String localeArg = "--locale=" + Locale.getDefault().toString() + "\n"; |
| final String securityArg = "--security\n"; |
| |
| String command = filenameArg + localeArg; |
| if (securityUpdate) { |
| command += securityArg; |
| } |
| |
| RecoverySystem rs = (RecoverySystem) context.getSystemService( |
| Context.RECOVERY_SERVICE); |
| if (!rs.setupBcb(command)) { |
| throw new IOException("Setup BCB failed"); |
| } |
| |
| // Having set up the BCB (bootloader control block), go ahead and reboot |
| PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); |
| pm.reboot(PowerManager.REBOOT_RECOVERY_UPDATE); |
| |
| throw new IOException("Reboot failed (no permissions?)"); |
| } |
| } |
| |
| /** |
| * Schedule to install the given package on next boot. The caller needs to |
| * ensure that the package must have been processed (uncrypt'd) if needed. |
| * It sets up the command in BCB (bootloader control block), which will |
| * be read by the bootloader and the recovery image. |
| * |
| * @param Context the Context to use. |
| * @param packageFile the package to be installed. |
| * |
| * @throws IOException if there were any errors setting up the BCB. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static void scheduleUpdateOnBoot(Context context, File packageFile) |
| throws IOException { |
| String filename = packageFile.getCanonicalPath(); |
| boolean securityUpdate = filename.endsWith("_s.zip"); |
| |
| // If the package is on the /data partition, use the block map file as |
| // the package name instead. |
| if (filename.startsWith("/data/")) { |
| filename = "@/cache/recovery/block.map"; |
| } |
| |
| final String filenameArg = "--update_package=" + filename + "\n"; |
| final String localeArg = "--locale=" + Locale.getDefault().toString() + "\n"; |
| final String securityArg = "--security\n"; |
| |
| String command = filenameArg + localeArg; |
| if (securityUpdate) { |
| command += securityArg; |
| } |
| |
| RecoverySystem rs = (RecoverySystem) context.getSystemService(Context.RECOVERY_SERVICE); |
| if (!rs.setupBcb(command)) { |
| throw new IOException("schedule update on boot failed"); |
| } |
| } |
| |
| /** |
| * Cancel any scheduled update by clearing up the BCB (bootloader control |
| * block). |
| * |
| * @param Context the Context to use. |
| * |
| * @throws IOException if there were any errors clearing up the BCB. |
| * |
| * @hide |
| */ |
| @SystemApi |
| public static void cancelScheduledUpdate(Context context) |
| throws IOException { |
| RecoverySystem rs = (RecoverySystem) context.getSystemService(Context.RECOVERY_SERVICE); |
| if (!rs.clearBcb()) { |
| throw new IOException("cancel scheduled update failed"); |
| } |
| } |
| |
| /** |
| * Reboots the device and wipes the user data and cache |
| * partitions. This is sometimes called a "factory reset", which |
| * is something of a misnomer because the system partition is not |
| * restored to its factory state. Requires the |
| * {@link android.Manifest.permission#REBOOT} permission. |
| * |
| * @param context the Context to use |
| * |
| * @throws IOException if writing the recovery command file |
| * fails, or if the reboot itself fails. |
| * @throws SecurityException if the current user is not allowed to wipe data. |
| */ |
| public static void rebootWipeUserData(Context context) throws IOException { |
| rebootWipeUserData(context, false, context.getPackageName()); |
| } |
| |
| /** {@hide} */ |
| public static void rebootWipeUserData(Context context, String reason) throws IOException { |
| rebootWipeUserData(context, false, reason); |
| } |
| |
| /** {@hide} */ |
| public static void rebootWipeUserData(Context context, boolean shutdown) |
| throws IOException { |
| rebootWipeUserData(context, shutdown, context.getPackageName()); |
| } |
| |
| /** |
| * Reboots the device and wipes the user data and cache |
| * partitions. This is sometimes called a "factory reset", which |
| * is something of a misnomer because the system partition is not |
| * restored to its factory state. Requires the |
| * {@link android.Manifest.permission#REBOOT} permission. |
| * |
| * @param context the Context to use |
| * @param shutdown if true, the device will be powered down after |
| * the wipe completes, rather than being rebooted |
| * back to the regular system. |
| * |
| * @throws IOException if writing the recovery command file |
| * fails, or if the reboot itself fails. |
| * @throws SecurityException if the current user is not allowed to wipe data. |
| * |
| * @hide |
| */ |
| public static void rebootWipeUserData(Context context, boolean shutdown, String reason) |
| throws IOException { |
| UserManager um = (UserManager) context.getSystemService(Context.USER_SERVICE); |
| if (um.hasUserRestriction(UserManager.DISALLOW_FACTORY_RESET)) { |
| throw new SecurityException("Wiping data is not allowed for this user."); |
| } |
| final ConditionVariable condition = new ConditionVariable(); |
| |
| Intent intent = new Intent("android.intent.action.MASTER_CLEAR_NOTIFICATION"); |
| intent.addFlags(Intent.FLAG_RECEIVER_FOREGROUND); |
| context.sendOrderedBroadcastAsUser(intent, UserHandle.SYSTEM, |
| android.Manifest.permission.MASTER_CLEAR, |
| new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| condition.open(); |
| } |
| }, null, 0, null, null); |
| |
| // Block until the ordered broadcast has completed. |
| condition.block(); |
| |
| String shutdownArg = null; |
| if (shutdown) { |
| shutdownArg = "--shutdown_after"; |
| } |
| |
| String reasonArg = null; |
| if (!TextUtils.isEmpty(reason)) { |
| reasonArg = "--reason=" + sanitizeArg(reason); |
| } |
| |
| final String localeArg = "--locale=" + Locale.getDefault().toString(); |
| bootCommand(context, shutdownArg, "--wipe_data", reasonArg, localeArg); |
| } |
| |
| /** |
| * Reboot into the recovery system to wipe the /cache partition. |
| * @throws IOException if something goes wrong. |
| */ |
| public static void rebootWipeCache(Context context) throws IOException { |
| rebootWipeCache(context, context.getPackageName()); |
| } |
| |
| /** {@hide} */ |
| public static void rebootWipeCache(Context context, String reason) throws IOException { |
| String reasonArg = null; |
| if (!TextUtils.isEmpty(reason)) { |
| reasonArg = "--reason=" + sanitizeArg(reason); |
| } |
| |
| final String localeArg = "--locale=" + Locale.getDefault().toString(); |
| bootCommand(context, "--wipe_cache", reasonArg, localeArg); |
| } |
| |
| /** |
| * Reboot into the recovery system with the supplied argument. |
| * @param args to pass to the recovery utility. |
| * @throws IOException if something goes wrong. |
| */ |
| private static void bootCommand(Context context, String... args) throws IOException { |
| synchronized (sRequestLock) { |
| LOG_FILE.delete(); |
| |
| StringBuilder command = new StringBuilder(); |
| for (String arg : args) { |
| if (!TextUtils.isEmpty(arg)) { |
| command.append(arg); |
| command.append("\n"); |
| } |
| } |
| |
| // Write the command into BCB (bootloader control block). |
| RecoverySystem rs = (RecoverySystem) context.getSystemService( |
| Context.RECOVERY_SERVICE); |
| rs.setupBcb(command.toString()); |
| |
| // Having set up the BCB, go ahead and reboot. |
| PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); |
| pm.reboot(PowerManager.REBOOT_RECOVERY); |
| |
| throw new IOException("Reboot failed (no permissions?)"); |
| } |
| } |
| |
| // Read last_install; then report time (in seconds) and I/O (in MiB) for |
| // this update to tron. |
| // Only report on the reboots immediately after an OTA update. |
| private static void parseLastInstallLog(Context context) { |
| try (BufferedReader in = new BufferedReader(new FileReader(LAST_INSTALL_FILE))) { |
| String line = null; |
| int bytesWrittenInMiB = -1, bytesStashedInMiB = -1; |
| int timeTotal = -1; |
| int sourceVersion = -1; |
| while ((line = in.readLine()) != null) { |
| // Here is an example of lines in last_install: |
| // ... |
| // time_total: 101 |
| // bytes_written_vendor: 51074 |
| // bytes_stashed_vendor: 200 |
| int numIndex = line.indexOf(':'); |
| if (numIndex == -1 || numIndex + 1 >= line.length()) { |
| continue; |
| } |
| String numString = line.substring(numIndex + 1).trim(); |
| long parsedNum; |
| try { |
| parsedNum = Long.parseLong(numString); |
| } catch (NumberFormatException ignored) { |
| Log.e(TAG, "Failed to parse numbers in " + line); |
| continue; |
| } |
| |
| final int MiB = 1024 * 1024; |
| int scaled; |
| try { |
| if (line.startsWith("bytes")) { |
| scaled = Math.toIntExact(parsedNum / MiB); |
| } else { |
| scaled = Math.toIntExact(parsedNum); |
| } |
| } catch (ArithmeticException ignored) { |
| Log.e(TAG, "Number overflows in " + line); |
| continue; |
| } |
| |
| if (line.startsWith("time")) { |
| timeTotal = scaled; |
| } else if (line.startsWith("source_build")) { |
| sourceVersion = scaled; |
| } else if (line.startsWith("bytes_written")) { |
| bytesWrittenInMiB = (bytesWrittenInMiB == -1) ? scaled : |
| bytesWrittenInMiB + scaled; |
| } else if (line.startsWith("bytes_stashed")) { |
| bytesStashedInMiB = (bytesStashedInMiB == -1) ? scaled : |
| bytesStashedInMiB + scaled; |
| } |
| } |
| |
| // Don't report data to tron if corresponding entry isn't found in last_install. |
| if (timeTotal != -1) { |
| MetricsLogger.histogram(context, "ota_time_total", timeTotal); |
| } |
| if (sourceVersion != -1) { |
| MetricsLogger.histogram(context, "ota_source_version", sourceVersion); |
| } |
| if (bytesWrittenInMiB != -1) { |
| MetricsLogger.histogram(context, "ota_written_in_MiBs", bytesWrittenInMiB); |
| } |
| if (bytesStashedInMiB != -1) { |
| MetricsLogger.histogram(context, "ota_stashed_in_MiBs", bytesStashedInMiB); |
| } |
| |
| } catch (IOException e) { |
| Log.e(TAG, "Failed to read lines in last_install", e); |
| } |
| } |
| |
| /** |
| * Called after booting to process and remove recovery-related files. |
| * @return the log file from recovery, or null if none was found. |
| * |
| * @hide |
| */ |
| public static String handleAftermath(Context context) { |
| // Record the tail of the LOG_FILE |
| String log = null; |
| try { |
| log = FileUtils.readTextFile(LOG_FILE, -LOG_FILE_MAX_LENGTH, "...\n"); |
| } catch (FileNotFoundException e) { |
| Log.i(TAG, "No recovery log file"); |
| } catch (IOException e) { |
| Log.e(TAG, "Error reading recovery log", e); |
| } |
| |
| if (log != null) { |
| parseLastInstallLog(context); |
| } |
| |
| // Only remove the OTA package if it's partially processed (uncrypt'd). |
| boolean reservePackage = BLOCK_MAP_FILE.exists(); |
| if (!reservePackage && UNCRYPT_PACKAGE_FILE.exists()) { |
| String filename = null; |
| try { |
| filename = FileUtils.readTextFile(UNCRYPT_PACKAGE_FILE, 0, null); |
| } catch (IOException e) { |
| Log.e(TAG, "Error reading uncrypt file", e); |
| } |
| |
| // Remove the OTA package on /data that has been (possibly |
| // partially) processed. (Bug: 24973532) |
| if (filename != null && filename.startsWith("/data")) { |
| if (UNCRYPT_PACKAGE_FILE.delete()) { |
| Log.i(TAG, "Deleted: " + filename); |
| } else { |
| Log.e(TAG, "Can't delete: " + filename); |
| } |
| } |
| } |
| |
| // We keep the update logs (beginning with LAST_PREFIX), and optionally |
| // the block map file (BLOCK_MAP_FILE) for a package. BLOCK_MAP_FILE |
| // will be created at the end of a successful uncrypt. If seeing this |
| // file, we keep the block map file and the file that contains the |
| // package name (UNCRYPT_PACKAGE_FILE). This is to reduce the work for |
| // GmsCore to avoid re-downloading everything again. |
| String[] names = RECOVERY_DIR.list(); |
| for (int i = 0; names != null && i < names.length; i++) { |
| if (names[i].startsWith(LAST_PREFIX)) continue; |
| if (reservePackage && names[i].equals(BLOCK_MAP_FILE.getName())) continue; |
| if (reservePackage && names[i].equals(UNCRYPT_PACKAGE_FILE.getName())) continue; |
| |
| recursiveDelete(new File(RECOVERY_DIR, names[i])); |
| } |
| |
| return log; |
| } |
| |
| /** |
| * Internally, delete a given file or directory recursively. |
| */ |
| private static void recursiveDelete(File name) { |
| if (name.isDirectory()) { |
| String[] files = name.list(); |
| for (int i = 0; files != null && i < files.length; i++) { |
| File f = new File(name, files[i]); |
| recursiveDelete(f); |
| } |
| } |
| |
| if (!name.delete()) { |
| Log.e(TAG, "Can't delete: " + name); |
| } else { |
| Log.i(TAG, "Deleted: " + name); |
| } |
| } |
| |
| /** |
| * Talks to RecoverySystemService via Binder to trigger uncrypt. |
| */ |
| private boolean uncrypt(String packageFile, IRecoverySystemProgressListener listener) { |
| try { |
| return mService.uncrypt(packageFile, listener); |
| } catch (RemoteException unused) { |
| } |
| return false; |
| } |
| |
| /** |
| * Talks to RecoverySystemService via Binder to set up the BCB. |
| */ |
| private boolean setupBcb(String command) { |
| try { |
| return mService.setupBcb(command); |
| } catch (RemoteException unused) { |
| } |
| return false; |
| } |
| |
| /** |
| * Talks to RecoverySystemService via Binder to clear up the BCB. |
| */ |
| private boolean clearBcb() { |
| try { |
| return mService.clearBcb(); |
| } catch (RemoteException unused) { |
| } |
| return false; |
| } |
| |
| /** |
| * Internally, recovery treats each line of the command file as a separate |
| * argv, so we only need to protect against newlines and nulls. |
| */ |
| private static String sanitizeArg(String arg) { |
| arg = arg.replace('\0', '?'); |
| arg = arg.replace('\n', '?'); |
| return arg; |
| } |
| |
| |
| /** |
| * @removed Was previously made visible by accident. |
| */ |
| public RecoverySystem() { |
| mService = null; |
| } |
| |
| /** |
| * @hide |
| */ |
| public RecoverySystem(IRecoverySystem service) { |
| mService = service; |
| } |
| } |
