| /* |
| * Copyright (C) 2012 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 com.android.server.webkit; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.PackageManager.NameNotFoundException; |
| import android.content.pm.Signature; |
| import android.os.Binder; |
| import android.os.PatternMatcher; |
| import android.os.Process; |
| import android.os.ResultReceiver; |
| import android.os.UserHandle; |
| import android.util.Base64; |
| import android.util.Slog; |
| import android.webkit.IWebViewUpdateService; |
| import android.webkit.WebViewFactory; |
| import android.webkit.WebViewProviderInfo; |
| import android.webkit.WebViewProviderResponse; |
| |
| import com.android.server.SystemService; |
| |
| import java.io.FileDescriptor; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Private service to wait for the updatable WebView to be ready for use. |
| * @hide |
| */ |
| public class WebViewUpdateService extends SystemService { |
| |
| private static final String TAG = "WebViewUpdateService"; |
| private static final int WAIT_TIMEOUT_MS = 4500; // KEY_DISPATCHING_TIMEOUT is 5000. |
| |
| // Keeps track of the number of running relro creations |
| private int mNumRelroCreationsStarted = 0; |
| private int mNumRelroCreationsFinished = 0; |
| // Implies that we need to rerun relro creation because we are using an out-of-date package |
| private boolean mWebViewPackageDirty = false; |
| private boolean mAnyWebViewInstalled = false; |
| |
| private int NUMBER_OF_RELROS_UNKNOWN = Integer.MAX_VALUE; |
| |
| // The WebView package currently in use (or the one we are preparing). |
| private PackageInfo mCurrentWebViewPackage = null; |
| |
| private BroadcastReceiver mWebViewUpdatedReceiver; |
| private SystemInterface mSystemInterface; |
| |
| public WebViewUpdateService(Context context) { |
| super(context); |
| mSystemInterface = new SystemImpl(); |
| } |
| |
| @Override |
| public void onStart() { |
| mWebViewUpdatedReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| // When a package is replaced we will receive two intents, one representing |
| // the removal of the old package and one representing the addition of the |
| // new package. |
| // In the case where we receive an intent to remove the old version of the |
| // package that is being replaced we early-out here so that we don't run the |
| // update-logic twice. |
| if (intent.getAction().equals(Intent.ACTION_PACKAGE_REMOVED) |
| && intent.getExtras().getBoolean(Intent.EXTRA_REPLACING)) { |
| return; |
| } |
| |
| // Ensure that we only heed PACKAGE_CHANGED intents if they change an entire |
| // package, not just a component |
| if (intent.getAction().equals(Intent.ACTION_PACKAGE_CHANGED)) { |
| if (!entirePackageChanged(intent)) { |
| return; |
| } |
| } |
| |
| if (intent.getAction().equals(Intent.ACTION_USER_ADDED)) { |
| int userId = |
| intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); |
| handleNewUser(userId); |
| return; |
| } |
| |
| updateFallbackState(context, intent); |
| |
| for (WebViewProviderInfo provider : mSystemInterface.getWebViewPackages()) { |
| String webviewPackage = "package:" + provider.packageName; |
| |
| if (webviewPackage.equals(intent.getDataString())) { |
| boolean updateWebView = false; |
| boolean removedOrChangedOldPackage = false; |
| String oldProviderName = null; |
| PackageInfo newPackage = null; |
| synchronized(WebViewUpdateService.this) { |
| try { |
| newPackage = findPreferredWebViewPackage(); |
| if (mCurrentWebViewPackage != null) |
| oldProviderName = mCurrentWebViewPackage.packageName; |
| // Only trigger update actions if the updated package is the one |
| // that will be used, or the one that was in use before the |
| // update, or if we haven't seen a valid WebView package before. |
| updateWebView = |
| provider.packageName.equals(newPackage.packageName) |
| || provider.packageName.equals(oldProviderName) |
| || mCurrentWebViewPackage == null; |
| // We removed the old package if we received an intent to remove |
| // or replace the old package. |
| removedOrChangedOldPackage = |
| provider.packageName.equals(oldProviderName); |
| if (updateWebView) { |
| onWebViewProviderChanged(newPackage); |
| } |
| } catch (WebViewFactory.MissingWebViewPackageException e) { |
| Slog.e(TAG, "Could not find valid WebView package to create " + |
| "relro with " + e); |
| } |
| } |
| if(updateWebView && !removedOrChangedOldPackage |
| && oldProviderName != null) { |
| // If the provider change is the result of adding or replacing a |
| // package that was not the previous provider then we must kill |
| // packages dependent on the old package ourselves. The framework |
| // only kills dependents of packages that are being removed. |
| mSystemInterface.killPackageDependents(oldProviderName); |
| } |
| return; |
| } |
| } |
| } |
| }; |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_PACKAGE_ADDED); |
| filter.addAction(Intent.ACTION_PACKAGE_REMOVED); |
| filter.addAction(Intent.ACTION_PACKAGE_CHANGED); |
| filter.addDataScheme("package"); |
| // Make sure we only receive intents for WebView packages from our config file. |
| for (WebViewProviderInfo provider : mSystemInterface.getWebViewPackages()) { |
| filter.addDataSchemeSpecificPart(provider.packageName, PatternMatcher.PATTERN_LITERAL); |
| } |
| getContext().registerReceiver(mWebViewUpdatedReceiver, filter); |
| |
| IntentFilter userAddedFilter = new IntentFilter(); |
| userAddedFilter.addAction(Intent.ACTION_USER_ADDED); |
| getContext().registerReceiver(mWebViewUpdatedReceiver, userAddedFilter); |
| |
| publishBinderService("webviewupdate", new BinderService(), true /*allowIsolated*/); |
| } |
| |
| private boolean existsValidNonFallbackProvider(WebViewProviderInfo[] providers) { |
| for (WebViewProviderInfo provider : providers) { |
| if (provider.availableByDefault && !provider.isFallback) { |
| try { |
| PackageInfo packageInfo = mSystemInterface.getPackageInfoForProvider(provider); |
| if (isEnabledPackage(packageInfo) && isValidProvider(provider, packageInfo)) { |
| return true; |
| } |
| } catch (NameNotFoundException e) { |
| // A non-existent provider is neither valid nor enabled |
| } |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Called when a new user has been added to update the state of its fallback package. |
| */ |
| void handleNewUser(int userId) { |
| if (!mSystemInterface.isFallbackLogicEnabled()) return; |
| |
| WebViewProviderInfo[] webviewProviders = mSystemInterface.getWebViewPackages(); |
| WebViewProviderInfo fallbackProvider = getFallbackProvider(webviewProviders); |
| if (fallbackProvider == null) return; |
| |
| mSystemInterface.enablePackageForUser(fallbackProvider.packageName, |
| !existsValidNonFallbackProvider(webviewProviders), userId); |
| } |
| |
| /** |
| * Handle the enabled-state of our fallback package, i.e. if there exists some non-fallback |
| * package that is valid (and available by default) then disable the fallback package, |
| * otherwise, enable the fallback package. |
| */ |
| void updateFallbackState(final Context context, final Intent intent) { |
| if (!mSystemInterface.isFallbackLogicEnabled()) return; |
| |
| WebViewProviderInfo[] webviewProviders = mSystemInterface.getWebViewPackages(); |
| |
| if (intent != null && (intent.getAction().equals(Intent.ACTION_PACKAGE_ADDED) |
| || intent.getAction().equals(Intent.ACTION_PACKAGE_CHANGED))) { |
| // A package was changed / updated / downgraded, early out if it is not one of the |
| // webview packages that are available by default. |
| String changedPackage = null; |
| for (WebViewProviderInfo provider : webviewProviders) { |
| String webviewPackage = "package:" + provider.packageName; |
| if (webviewPackage.equals(intent.getDataString())) { |
| if (provider.availableByDefault) { |
| changedPackage = provider.packageName; |
| } |
| break; |
| } |
| } |
| if (changedPackage == null) return; |
| } |
| |
| // If there exists a valid and enabled non-fallback package - disable the fallback |
| // package, otherwise, enable it. |
| WebViewProviderInfo fallbackProvider = getFallbackProvider(webviewProviders); |
| if (fallbackProvider == null) return; |
| boolean existsValidNonFallbackProvider = existsValidNonFallbackProvider(webviewProviders); |
| |
| boolean isFallbackEnabled = false; |
| try { |
| isFallbackEnabled = |
| isEnabledPackage(mSystemInterface.getPackageInfoForProvider(fallbackProvider)); |
| } catch (NameNotFoundException e) { |
| } |
| |
| if (existsValidNonFallbackProvider |
| // During an OTA the primary user's WebView state might differ from other users', so |
| // ignore the state of that user during boot. |
| && (isFallbackEnabled || intent == null)) { |
| mSystemInterface.uninstallAndDisablePackageForAllUsers(context, |
| fallbackProvider.packageName); |
| } else if (!existsValidNonFallbackProvider |
| // During an OTA the primary user's WebView state might differ from other users', so |
| // ignore the state of that user during boot. |
| && (!isFallbackEnabled || intent==null)) { |
| // Enable the fallback package for all users. |
| mSystemInterface.enablePackageForAllUsers(context, fallbackProvider.packageName, true); |
| } |
| } |
| |
| /** |
| * Returns the only fallback provider, or null if there is none. |
| */ |
| private static WebViewProviderInfo getFallbackProvider(WebViewProviderInfo[] webviewPackages) { |
| for (WebViewProviderInfo provider : webviewPackages) { |
| if (provider.isFallback) { |
| return provider; |
| } |
| } |
| return null; |
| } |
| |
| private boolean isFallbackPackage(String packageName) { |
| if (packageName == null || !mSystemInterface.isFallbackLogicEnabled()) return false; |
| |
| WebViewProviderInfo[] webviewPackages = mSystemInterface.getWebViewPackages(); |
| WebViewProviderInfo fallbackProvider = getFallbackProvider(webviewPackages); |
| return (fallbackProvider != null |
| && packageName.equals(fallbackProvider.packageName)); |
| } |
| |
| /** |
| * Perform any WebView loading preparations that must happen at boot from the system server, |
| * after the package manager has started or after an update to the webview is installed. |
| * This must be called in the system server. |
| * Currently, this means spawning the child processes which will create the relro files. |
| */ |
| public void prepareWebViewInSystemServer() { |
| updateFallbackState(getContext(), null); |
| try { |
| synchronized(this) { |
| mCurrentWebViewPackage = findPreferredWebViewPackage(); |
| onWebViewProviderChanged(mCurrentWebViewPackage); |
| } |
| } catch (Throwable t) { |
| // Log and discard errors at this stage as we must not crash the system server. |
| Slog.e(TAG, "error preparing webview provider from system server", t); |
| } |
| } |
| |
| |
| /** |
| * Change WebView provider and provider setting and kill packages using the old provider. |
| * Return the new provider (in case we are in the middle of creating relro files this new |
| * provider will not be in use directly, but will when the relros are done). |
| */ |
| private String changeProviderAndSetting(String newProviderName) { |
| PackageInfo oldPackage = null; |
| PackageInfo newPackage = null; |
| synchronized(this) { |
| oldPackage = mCurrentWebViewPackage; |
| mSystemInterface.updateUserSetting(getContext(), newProviderName); |
| |
| try { |
| newPackage = findPreferredWebViewPackage(); |
| if (oldPackage != null && newPackage.packageName.equals(oldPackage.packageName)) { |
| // If we don't perform the user change, revert the settings change. |
| mSystemInterface.updateUserSetting(getContext(), newPackage.packageName); |
| return newPackage.packageName; |
| } |
| } catch (WebViewFactory.MissingWebViewPackageException e) { |
| Slog.e(TAG, "Tried to change WebView provider but failed to fetch WebView package " |
| + e); |
| // If we don't perform the user change but don't have an installed WebView package, |
| // we will have changed the setting and it will be used when a package is available. |
| return newProviderName; |
| } |
| onWebViewProviderChanged(newPackage); |
| } |
| // Kill apps using the old provider |
| if (oldPackage != null) { |
| mSystemInterface.killPackageDependents(oldPackage.packageName); |
| } |
| return newPackage.packageName; |
| } |
| |
| /** |
| * This is called when we change WebView provider, either when the current provider is updated |
| * or a new provider is chosen / takes precedence. |
| */ |
| private void onWebViewProviderChanged(PackageInfo newPackage) { |
| synchronized(this) { |
| mAnyWebViewInstalled = true; |
| if (mNumRelroCreationsStarted == mNumRelroCreationsFinished) { |
| mCurrentWebViewPackage = newPackage; |
| mSystemInterface.updateUserSetting(getContext(), newPackage.packageName); |
| |
| // The relro creations might 'finish' (not start at all) before |
| // WebViewFactory.onWebViewProviderChanged which means we might not know the number |
| // of started creations before they finish. |
| mNumRelroCreationsStarted = NUMBER_OF_RELROS_UNKNOWN; |
| mNumRelroCreationsFinished = 0; |
| mNumRelroCreationsStarted = mSystemInterface.onWebViewProviderChanged(newPackage); |
| // If the relro creations finish before we know the number of started creations we |
| // will have to do any cleanup/notifying here. |
| checkIfRelrosDoneLocked(); |
| } else { |
| mWebViewPackageDirty = true; |
| } |
| } |
| } |
| |
| private ProviderAndPackageInfo[] getValidWebViewPackagesAndInfos() { |
| WebViewProviderInfo[] allProviders = mSystemInterface.getWebViewPackages(); |
| List<ProviderAndPackageInfo> providers = new ArrayList<>(); |
| for(int n = 0; n < allProviders.length; n++) { |
| try { |
| PackageInfo packageInfo = |
| mSystemInterface.getPackageInfoForProvider(allProviders[n]); |
| if (isValidProvider(allProviders[n], packageInfo)) { |
| providers.add(new ProviderAndPackageInfo(allProviders[n], packageInfo)); |
| } |
| } catch (NameNotFoundException e) { |
| // Don't add non-existent packages |
| } |
| } |
| return providers.toArray(new ProviderAndPackageInfo[providers.size()]); |
| } |
| |
| /** |
| * Fetch only the currently valid WebView packages. |
| **/ |
| private WebViewProviderInfo[] getValidWebViewPackages() { |
| ProviderAndPackageInfo[] providersAndPackageInfos = getValidWebViewPackagesAndInfos(); |
| WebViewProviderInfo[] providers = new WebViewProviderInfo[providersAndPackageInfos.length]; |
| for(int n = 0; n < providersAndPackageInfos.length; n++) { |
| providers[n] = providersAndPackageInfos[n].provider; |
| } |
| return providers; |
| } |
| |
| private class ProviderAndPackageInfo { |
| public final WebViewProviderInfo provider; |
| public final PackageInfo packageInfo; |
| |
| public ProviderAndPackageInfo(WebViewProviderInfo provider, PackageInfo packageInfo) { |
| this.provider = provider; |
| this.packageInfo = packageInfo; |
| } |
| } |
| |
| /** |
| * Returns either the package info of the WebView provider determined in the following way: |
| * If the user has chosen a provider then use that if it is valid, |
| * otherwise use the first package in the webview priority list that is valid. |
| * |
| * @hide |
| */ |
| private PackageInfo findPreferredWebViewPackage() { |
| ProviderAndPackageInfo[] providers = getValidWebViewPackagesAndInfos(); |
| |
| String userChosenProvider = mSystemInterface.getUserChosenWebViewProvider(getContext()); |
| |
| // If the user has chosen provider, use that |
| for (ProviderAndPackageInfo providerAndPackage : providers) { |
| if (providerAndPackage.provider.packageName.equals(userChosenProvider) |
| && isEnabledPackage(providerAndPackage.packageInfo)) { |
| return providerAndPackage.packageInfo; |
| } |
| } |
| |
| // User did not choose, or the choice failed; use the most stable provider that is |
| // enabled and available by default (not through user choice). |
| for (ProviderAndPackageInfo providerAndPackage : providers) { |
| if (providerAndPackage.provider.availableByDefault |
| && isEnabledPackage(providerAndPackage.packageInfo)) { |
| return providerAndPackage.packageInfo; |
| } |
| } |
| |
| // Could not find any enabled package either, use the most stable provider. |
| for (ProviderAndPackageInfo providerAndPackage : providers) { |
| return providerAndPackage.packageInfo; |
| } |
| |
| mAnyWebViewInstalled = false; |
| throw new WebViewFactory.MissingWebViewPackageException( |
| "Could not find a loadable WebView package"); |
| } |
| |
| |
| /** |
| * Returns whether this provider is valid for use as a WebView provider. |
| */ |
| public boolean isValidProvider(WebViewProviderInfo configInfo, |
| PackageInfo packageInfo) { |
| if (providerHasValidSignature(configInfo, packageInfo) && |
| WebViewFactory.getWebViewLibrary(packageInfo.applicationInfo) != null) { |
| return true; |
| } |
| return false; |
| } |
| |
| private boolean providerHasValidSignature(WebViewProviderInfo provider, |
| PackageInfo packageInfo) { |
| if (mSystemInterface.systemIsDebuggable()) { |
| return true; |
| } |
| Signature[] packageSignatures; |
| // If no signature is declared, instead check whether the package is included in the |
| // system. |
| if (provider.signatures == null || provider.signatures.length == 0) { |
| return packageInfo.applicationInfo.isSystemApp(); |
| } |
| packageSignatures = packageInfo.signatures; |
| if (packageSignatures.length != 1) |
| return false; |
| |
| final byte[] packageSignature = packageSignatures[0].toByteArray(); |
| // Return whether the package signature matches any of the valid signatures |
| for (String signature : provider.signatures) { |
| final byte[] validSignature = Base64.decode(signature, Base64.DEFAULT); |
| if (Arrays.equals(packageSignature, validSignature)) |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns whether the given package is enabled. |
| * This state can be changed by the user from Settings->Apps |
| */ |
| public boolean isEnabledPackage(PackageInfo packageInfo) { |
| return packageInfo.applicationInfo.enabled; |
| } |
| |
| /** |
| * Returns whether the entire package from an ACTION_PACKAGE_CHANGED intent was changed (rather |
| * than just one of its components). |
| * @hide |
| */ |
| public static boolean entirePackageChanged(Intent intent) { |
| String[] componentList = |
| intent.getStringArrayExtra(Intent.EXTRA_CHANGED_COMPONENT_NAME_LIST); |
| return Arrays.asList(componentList).contains( |
| intent.getDataString().substring("package:".length())); |
| } |
| |
| /** |
| * Returns whether WebView is ready and is not going to go through its preparation phase again |
| * directly. |
| */ |
| private boolean webViewIsReadyLocked() { |
| return !mWebViewPackageDirty |
| && (mNumRelroCreationsStarted == mNumRelroCreationsFinished) |
| // The current package might be replaced though we haven't received an intent declaring |
| // this yet, the following flag makes anyone loading WebView to wait in this case. |
| && mAnyWebViewInstalled; |
| } |
| |
| private void checkIfRelrosDoneLocked() { |
| if (mNumRelroCreationsStarted == mNumRelroCreationsFinished) { |
| if (mWebViewPackageDirty) { |
| mWebViewPackageDirty = false; |
| // If we have changed provider since we started the relro creation we need to |
| // redo the whole process using the new package instead. |
| PackageInfo newPackage = findPreferredWebViewPackage(); |
| onWebViewProviderChanged(newPackage); |
| } else { |
| this.notifyAll(); |
| } |
| } |
| } |
| |
| private class BinderService extends IWebViewUpdateService.Stub { |
| |
| @Override |
| public void onShellCommand(FileDescriptor in, FileDescriptor out, |
| FileDescriptor err, String[] args, ResultReceiver resultReceiver) { |
| (new WebViewUpdateServiceShellCommand(this)).exec( |
| this, in, out, err, args, resultReceiver); |
| } |
| |
| |
| /** |
| * The shared relro process calls this to notify us that it's done trying to create a relro |
| * file. This method gets called even if the relro creation has failed or the process |
| * crashed. |
| */ |
| @Override // Binder call |
| public void notifyRelroCreationCompleted() { |
| // Verify that the caller is either the shared relro process (nominal case) or the |
| // system server (only in the case the relro process crashes and we get here via the |
| // crashHandler). |
| if (Binder.getCallingUid() != Process.SHARED_RELRO_UID && |
| Binder.getCallingUid() != Process.SYSTEM_UID) { |
| return; |
| } |
| |
| long callingId = Binder.clearCallingIdentity(); |
| try { |
| synchronized (WebViewUpdateService.this) { |
| mNumRelroCreationsFinished++; |
| checkIfRelrosDoneLocked(); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| /** |
| * WebViewFactory calls this to block WebView loading until the relro file is created. |
| * Returns the WebView provider for which we create relro files. |
| */ |
| @Override // Binder call |
| public WebViewProviderResponse waitForAndGetProvider() { |
| // The WebViewUpdateService depends on the prepareWebViewInSystemServer call, which |
| // happens later (during the PHASE_ACTIVITY_MANAGER_READY) in SystemServer.java. If |
| // another service there tries to bring up a WebView in the between, the wait below |
| // would deadlock without the check below. |
| if (Binder.getCallingPid() == Process.myPid()) { |
| throw new IllegalStateException("Cannot create a WebView from the SystemServer"); |
| } |
| |
| PackageInfo webViewPackage = null; |
| final long NS_PER_MS = 1000000; |
| final long timeoutTimeMs = System.nanoTime() / NS_PER_MS + WAIT_TIMEOUT_MS; |
| boolean webViewReady = false; |
| int webViewStatus = WebViewFactory.LIBLOAD_SUCCESS; |
| synchronized (WebViewUpdateService.this) { |
| webViewReady = WebViewUpdateService.this.webViewIsReadyLocked(); |
| while (!webViewReady) { |
| final long timeNowMs = System.nanoTime() / NS_PER_MS; |
| if (timeNowMs >= timeoutTimeMs) break; |
| try { |
| WebViewUpdateService.this.wait(timeoutTimeMs - timeNowMs); |
| } catch (InterruptedException e) {} |
| webViewReady = WebViewUpdateService.this.webViewIsReadyLocked(); |
| } |
| // Make sure we return the provider that was used to create the relro file |
| webViewPackage = WebViewUpdateService.this.mCurrentWebViewPackage; |
| if (webViewReady) { |
| } else if (!mAnyWebViewInstalled) { |
| webViewStatus = WebViewFactory.LIBLOAD_FAILED_LISTING_WEBVIEW_PACKAGES; |
| } else { |
| // Either the current relro creation isn't done yet, or the new relro creatioin |
| // hasn't kicked off yet (the last relro creation used an out-of-date WebView). |
| webViewStatus = WebViewFactory.LIBLOAD_FAILED_WAITING_FOR_RELRO; |
| } |
| } |
| if (!webViewReady) Slog.w(TAG, "creating relro file timed out"); |
| return new WebViewProviderResponse(webViewPackage, webViewStatus); |
| } |
| |
| /** |
| * This is called from DeveloperSettings when the user changes WebView provider. |
| */ |
| @Override // Binder call |
| public String changeProviderAndSetting(String newProvider) { |
| if (getContext().checkCallingPermission( |
| android.Manifest.permission.WRITE_SECURE_SETTINGS) |
| != PackageManager.PERMISSION_GRANTED) { |
| String msg = "Permission Denial: changeProviderAndSetting() from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid() |
| + " requires " + android.Manifest.permission.WRITE_SECURE_SETTINGS; |
| Slog.w(TAG, msg); |
| throw new SecurityException(msg); |
| } |
| |
| long callingId = Binder.clearCallingIdentity(); |
| try { |
| return WebViewUpdateService.this.changeProviderAndSetting(newProvider); |
| } finally { |
| Binder.restoreCallingIdentity(callingId); |
| } |
| } |
| |
| @Override // Binder call |
| public WebViewProviderInfo[] getValidWebViewPackages() { |
| return WebViewUpdateService.this.getValidWebViewPackages(); |
| } |
| |
| @Override // Binder call |
| public WebViewProviderInfo[] getAllWebViewPackages() { |
| return WebViewUpdateService.this.mSystemInterface.getWebViewPackages(); |
| } |
| |
| @Override // Binder call |
| public String getCurrentWebViewPackageName() { |
| synchronized(WebViewUpdateService.this) { |
| if (WebViewUpdateService.this.mCurrentWebViewPackage == null) |
| return null; |
| return WebViewUpdateService.this.mCurrentWebViewPackage.packageName; |
| } |
| } |
| |
| @Override // Binder call |
| public boolean isFallbackPackage(String packageName) { |
| return WebViewUpdateService.this.isFallbackPackage(packageName); |
| } |
| |
| @Override // Binder call |
| public void enableFallbackLogic(boolean enable) { |
| if (getContext().checkCallingPermission( |
| android.Manifest.permission.WRITE_SECURE_SETTINGS) |
| != PackageManager.PERMISSION_GRANTED) { |
| String msg = "Permission Denial: enableFallbackLogic() from pid=" |
| + Binder.getCallingPid() |
| + ", uid=" + Binder.getCallingUid() |
| + " requires " + android.Manifest.permission.WRITE_SECURE_SETTINGS; |
| Slog.w(TAG, msg); |
| throw new SecurityException(msg); |
| } |
| |
| WebViewUpdateService.this.mSystemInterface.enableFallbackLogic(enable); |
| } |
| } |
| } |