| /* |
| * Copyright (C) 2015 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.pm; |
| |
| import android.content.Context; |
| import android.content.pm.EphemeralApplicationInfo; |
| import android.content.pm.PackageParser; |
| import android.content.pm.PackageUserState; |
| import android.graphics.Bitmap; |
| import android.graphics.BitmapFactory; |
| import android.graphics.Canvas; |
| import android.graphics.drawable.BitmapDrawable; |
| import android.graphics.drawable.Drawable; |
| import android.os.Binder; |
| import android.os.Environment; |
| import android.provider.Settings; |
| import android.util.AtomicFile; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.util.Xml; |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.util.ArrayUtils; |
| import com.android.internal.util.XmlUtils; |
| import libcore.io.IoUtils; |
| import libcore.util.EmptyArray; |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| import org.xmlpull.v1.XmlSerializer; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.nio.charset.StandardCharsets; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * This class is a part of the package manager service that is responsible |
| * for managing data associated with ephemeral apps such as cached uninstalled |
| * ephemeral apps and ephemeral apps' cookies. |
| */ |
| class EphemeralApplicationRegistry { |
| private static final boolean DEBUG = false; |
| |
| private static final boolean ENABLED = false; |
| |
| private static final String LOG_TAG = "EphemeralAppRegistry"; |
| |
| private static final long DEFAULT_UNINSTALLED_EPHEMERAL_APP_CACHE_DURATION_MILLIS = |
| DEBUG ? 60 * 1000L /* one min */ : 30 * 24 * 60 * 60 * 1000L; /* one month */ |
| |
| private final static char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray(); |
| |
| private static final String EPHEMERAL_APPS_FOLDER = "ephemeral"; |
| private static final String EPHEMERAL_APP_ICON_FILE = "icon.png"; |
| private static final String EPHEMERAL_APP_COOKIE_FILE_PREFIX = "cookie_"; |
| private static final String EPHEMERAL_APP_COOKIE_FILE_SIFFIX = ".dat"; |
| private static final String EPHEMERAL_APP_METADATA_FILE = "metadata.xml"; |
| |
| private static final String TAG_PACKAGE = "package"; |
| private static final String TAG_PERMS = "perms"; |
| private static final String TAG_PERM = "perm"; |
| |
| private static final String ATTR_LABEL = "label"; |
| private static final String ATTR_NAME = "name"; |
| private static final String ATTR_GRANTED = "granted"; |
| |
| private final PackageManagerService mService; |
| |
| @GuardedBy("mService.mPackages") |
| private SparseArray<List<UninstalledEphemeralAppState>> mUninstalledEphemeralApps; |
| |
| public EphemeralApplicationRegistry(PackageManagerService service) { |
| mService = service; |
| } |
| |
| public byte[] getEphemeralApplicationCookieLPw(String packageName, int userId) { |
| if (!ENABLED) { |
| return EmptyArray.BYTE; |
| } |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| File cookieFile = peekEphemeralCookieFile(packageName, userId); |
| if (cookieFile != null && cookieFile.exists()) { |
| try { |
| return IoUtils.readFileAsByteArray(cookieFile.toString()); |
| } catch (IOException e) { |
| Slog.w(LOG_TAG, "Error reading cookie file: " + cookieFile); |
| } |
| } |
| return null; |
| } |
| |
| public boolean setEphemeralApplicationCookieLPw(String packageName, |
| byte[] cookie, int userId) { |
| if (!ENABLED) { |
| return false; |
| } |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| PackageParser.Package pkg = mService.mPackages.get(packageName); |
| if (pkg == null) { |
| return false; |
| } |
| |
| if (!isValidCookie(mService.mContext, cookie)) { |
| return false; |
| } |
| |
| File appDir = getEphemeralApplicationDir(pkg.packageName, userId); |
| if (!appDir.exists() && !appDir.mkdirs()) { |
| return false; |
| } |
| |
| File cookieFile = computeEphemeralCookieFile(pkg, userId); |
| if (cookieFile.exists() && !cookieFile.delete()) { |
| return false; |
| } |
| |
| try (FileOutputStream fos = new FileOutputStream(cookieFile)) { |
| fos.write(cookie, 0, cookie.length); |
| } catch (IOException e) { |
| Slog.w(LOG_TAG, "Error writing cookie file: " + cookieFile); |
| return false; |
| } |
| return true; |
| } |
| |
| public Bitmap getEphemeralApplicationIconLPw(String packageName, int userId) { |
| if (!ENABLED) { |
| return null; |
| } |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| File iconFile = new File(getEphemeralApplicationDir(packageName, userId), |
| EPHEMERAL_APP_ICON_FILE); |
| if (iconFile.exists()) { |
| return BitmapFactory.decodeFile(iconFile.toString()); |
| } |
| return null; |
| } |
| |
| public List<EphemeralApplicationInfo> getEphemeralApplicationsLPw(int userId) { |
| if (!ENABLED) { |
| return Collections.emptyList(); |
| } |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| List<EphemeralApplicationInfo> result = getInstalledEphemeralApplicationsLPr(userId); |
| result.addAll(getUninstalledEphemeralApplicationsLPr(userId)); |
| return result; |
| } |
| |
| public void onPackageInstalledLPw(PackageParser.Package pkg) { |
| if (!ENABLED) { |
| return; |
| } |
| PackageSetting ps = (PackageSetting) pkg.mExtras; |
| if (ps == null) { |
| return; |
| } |
| for (int userId : UserManagerService.getInstance().getUserIds()) { |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| // Ignore not installed apps |
| if (mService.mPackages.get(pkg.packageName) == null || !ps.getInstalled(userId)) { |
| continue; |
| } |
| |
| // Propagate permissions before removing any state |
| propagateEphemeralAppPermissionsIfNeeded(pkg, userId); |
| |
| // Remove the in-memory state |
| if (mUninstalledEphemeralApps != null) { |
| List<UninstalledEphemeralAppState> uninstalledAppStates = |
| mUninstalledEphemeralApps.get(userId); |
| if (uninstalledAppStates != null) { |
| final int appCount = uninstalledAppStates.size(); |
| for (int i = 0; i < appCount; i++) { |
| UninstalledEphemeralAppState uninstalledAppState = |
| uninstalledAppStates.get(i); |
| if (uninstalledAppState.mEphemeralApplicationInfo |
| .getPackageName().equals(pkg.packageName)) { |
| uninstalledAppStates.remove(i); |
| break; |
| } |
| } |
| } |
| } |
| |
| // Remove the on-disk state except the cookie |
| File ephemeralAppDir = getEphemeralApplicationDir(pkg.packageName, userId); |
| new File(ephemeralAppDir, EPHEMERAL_APP_METADATA_FILE).delete(); |
| new File(ephemeralAppDir, EPHEMERAL_APP_ICON_FILE).delete(); |
| |
| // If app signature changed - wipe the cookie |
| File currentCookieFile = peekEphemeralCookieFile(pkg.packageName, userId); |
| if (currentCookieFile == null) { |
| continue; |
| } |
| File expectedCookeFile = computeEphemeralCookieFile(pkg, userId); |
| if (!currentCookieFile.equals(expectedCookeFile)) { |
| Slog.i(LOG_TAG, "Signature for package " + pkg.packageName |
| + " changed - dropping cookie"); |
| currentCookieFile.delete(); |
| } |
| } |
| } |
| |
| public void onPackageUninstalledLPw(PackageParser.Package pkg) { |
| if (!ENABLED) { |
| return; |
| } |
| if (pkg == null) { |
| return; |
| } |
| PackageSetting ps = (PackageSetting) pkg.mExtras; |
| if (ps == null) { |
| return; |
| } |
| for (int userId : UserManagerService.getInstance().getUserIds()) { |
| pruneUninstalledEphemeralAppsLPw(userId); |
| |
| if (mService.mPackages.get(pkg.packageName) != null && ps.getInstalled(userId)) { |
| continue; |
| } |
| |
| if (pkg.applicationInfo.isEphemeralApp()) { |
| // Add a record for an uninstalled ephemeral app |
| addUninstalledEphemeralAppLPw(pkg, userId); |
| } else { |
| // Deleting an app prunes all ephemeral state such as cookie |
| deleteDir(getEphemeralApplicationDir(pkg.packageName, userId)); |
| } |
| } |
| } |
| |
| public void onUserRemovedLPw(int userId) { |
| if (!ENABLED) { |
| return; |
| } |
| if (mUninstalledEphemeralApps != null) { |
| mUninstalledEphemeralApps.remove(userId); |
| } |
| deleteDir(getEphemeralApplicationsDir(userId)); |
| } |
| |
| private void addUninstalledEphemeralAppLPw(PackageParser.Package pkg, int userId) { |
| EphemeralApplicationInfo uninstalledApp = createEphemeralAppInfoForPackage(pkg, userId); |
| if (uninstalledApp == null) { |
| return; |
| } |
| if (mUninstalledEphemeralApps == null) { |
| mUninstalledEphemeralApps = new SparseArray<>(); |
| } |
| List<UninstalledEphemeralAppState> uninstalledAppStates = |
| mUninstalledEphemeralApps.get(userId); |
| if (uninstalledAppStates == null) { |
| uninstalledAppStates = new ArrayList<>(); |
| mUninstalledEphemeralApps.put(userId, uninstalledAppStates); |
| } |
| UninstalledEphemeralAppState uninstalledAppState = new UninstalledEphemeralAppState( |
| uninstalledApp, System.currentTimeMillis()); |
| uninstalledAppStates.add(uninstalledAppState); |
| |
| writeUninstalledEphemeralAppMetadata(uninstalledApp, userId); |
| writeEphemeralApplicationIconLPw(pkg, userId); |
| } |
| |
| private void writeEphemeralApplicationIconLPw(PackageParser.Package pkg, int userId) { |
| File appDir = getEphemeralApplicationDir(pkg.packageName, userId); |
| if (!appDir.exists()) { |
| return; |
| } |
| |
| Drawable icon = pkg.applicationInfo.loadIcon(mService.mContext.getPackageManager()); |
| |
| final Bitmap bitmap; |
| if (icon instanceof BitmapDrawable) { |
| bitmap = ((BitmapDrawable) icon).getBitmap(); |
| } else { |
| bitmap = Bitmap.createBitmap(icon.getIntrinsicWidth(), |
| icon.getIntrinsicHeight(), Bitmap.Config.ARGB_8888); |
| Canvas canvas = new Canvas(bitmap); |
| icon.draw(canvas); |
| } |
| |
| File iconFile = new File(getEphemeralApplicationDir(pkg.packageName, userId), |
| EPHEMERAL_APP_ICON_FILE); |
| |
| try (FileOutputStream out = new FileOutputStream(iconFile)) { |
| bitmap.compress(Bitmap.CompressFormat.PNG, 100, out); |
| } catch (Exception e) { |
| Slog.e(LOG_TAG, "Error writing ephemeral app icon", e); |
| } |
| } |
| |
| private void pruneUninstalledEphemeralAppsLPw(int userId) { |
| final long maxCacheDurationMillis = Settings.Global.getLong( |
| mService.mContext.getContentResolver(), |
| Settings.Global.UNINSTALLED_EPHEMERAL_APP_CACHE_DURATION_MILLIS, |
| DEFAULT_UNINSTALLED_EPHEMERAL_APP_CACHE_DURATION_MILLIS); |
| |
| // Prune in-memory state |
| if (mUninstalledEphemeralApps != null) { |
| List<UninstalledEphemeralAppState> uninstalledAppStates = |
| mUninstalledEphemeralApps.get(userId); |
| if (uninstalledAppStates != null) { |
| final int appCount = uninstalledAppStates.size(); |
| for (int j = appCount - 1; j >= 0; j--) { |
| UninstalledEphemeralAppState uninstalledAppState = uninstalledAppStates.get(j); |
| final long elapsedCachingMillis = System.currentTimeMillis() |
| - uninstalledAppState.mTimestamp; |
| if (elapsedCachingMillis > maxCacheDurationMillis) { |
| uninstalledAppStates.remove(j); |
| } |
| } |
| if (uninstalledAppStates.isEmpty()) { |
| mUninstalledEphemeralApps.remove(userId); |
| } |
| } |
| } |
| |
| // Prune on-disk state |
| File ephemeralAppsDir = getEphemeralApplicationsDir(userId); |
| if (!ephemeralAppsDir.exists()) { |
| return; |
| } |
| File[] files = ephemeralAppsDir.listFiles(); |
| if (files == null) { |
| return; |
| } |
| for (File ephemeralDir : files) { |
| if (!ephemeralDir.isDirectory()) { |
| continue; |
| } |
| |
| File metadataFile = new File(ephemeralDir, EPHEMERAL_APP_METADATA_FILE); |
| if (!metadataFile.exists()) { |
| continue; |
| } |
| |
| final long elapsedCachingMillis = System.currentTimeMillis() |
| - metadataFile.lastModified(); |
| if (elapsedCachingMillis > maxCacheDurationMillis) { |
| deleteDir(ephemeralDir); |
| } |
| } |
| } |
| |
| private List<EphemeralApplicationInfo> getInstalledEphemeralApplicationsLPr(int userId) { |
| List<EphemeralApplicationInfo> result = null; |
| |
| final int packageCount = mService.mPackages.size(); |
| for (int i = 0; i < packageCount; i++) { |
| PackageParser.Package pkg = mService.mPackages.valueAt(i); |
| if (!pkg.applicationInfo.isEphemeralApp()) { |
| continue; |
| } |
| EphemeralApplicationInfo info = createEphemeralAppInfoForPackage(pkg, userId); |
| if (info == null) { |
| continue; |
| } |
| if (result == null) { |
| result = new ArrayList<>(); |
| } |
| result.add(info); |
| } |
| |
| return result; |
| } |
| |
| private EphemeralApplicationInfo createEphemeralAppInfoForPackage( |
| PackageParser.Package pkg, int userId) { |
| PackageSetting ps = (PackageSetting) pkg.mExtras; |
| if (ps == null) { |
| return null; |
| } |
| PackageUserState userState = ps.readUserState(userId); |
| if (userState == null || !userState.installed || userState.hidden) { |
| return null; |
| } |
| |
| String[] requestedPermissions = new String[pkg.requestedPermissions.size()]; |
| pkg.requestedPermissions.toArray(requestedPermissions); |
| |
| Set<String> permissions = ps.getPermissionsState().getPermissions(userId); |
| String[] grantedPermissions = new String[permissions.size()]; |
| permissions.toArray(grantedPermissions); |
| |
| return new EphemeralApplicationInfo(pkg.applicationInfo, |
| requestedPermissions, grantedPermissions); |
| } |
| |
| private List<EphemeralApplicationInfo> getUninstalledEphemeralApplicationsLPr(int userId) { |
| List<UninstalledEphemeralAppState> uninstalledAppStates = |
| getUninstalledEphemeralAppStatesLPr(userId); |
| if (uninstalledAppStates == null || uninstalledAppStates.isEmpty()) { |
| return Collections.emptyList(); |
| } |
| |
| List<EphemeralApplicationInfo> uninstalledApps = new ArrayList<>(); |
| final int stateCount = uninstalledAppStates.size(); |
| for (int i = 0; i < stateCount; i++) { |
| UninstalledEphemeralAppState uninstalledAppState = uninstalledAppStates.get(i); |
| uninstalledApps.add(uninstalledAppState.mEphemeralApplicationInfo); |
| } |
| return uninstalledApps; |
| } |
| |
| private void propagateEphemeralAppPermissionsIfNeeded(PackageParser.Package pkg, int userId) { |
| EphemeralApplicationInfo appInfo = getOrParseUninstalledEphemeralAppInfo(pkg.packageName, userId); |
| if (appInfo == null) { |
| return; |
| } |
| if (ArrayUtils.isEmpty(appInfo.getGrantedPermissions())) { |
| return; |
| } |
| final long identity = Binder.clearCallingIdentity(); |
| try { |
| for (String grantedPermission : appInfo.getGrantedPermissions()) { |
| mService.grantRuntimePermission(pkg.packageName, grantedPermission, userId); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(identity); |
| } |
| } |
| |
| private EphemeralApplicationInfo getOrParseUninstalledEphemeralAppInfo(String packageName, |
| int userId) { |
| if (mUninstalledEphemeralApps != null) { |
| List<UninstalledEphemeralAppState> uninstalledAppStates = |
| mUninstalledEphemeralApps.get(userId); |
| if (uninstalledAppStates != null) { |
| final int appCount = uninstalledAppStates.size(); |
| for (int i = 0; i < appCount; i++) { |
| UninstalledEphemeralAppState uninstalledAppState = uninstalledAppStates.get(i); |
| if (uninstalledAppState.mEphemeralApplicationInfo |
| .getPackageName().equals(packageName)) { |
| return uninstalledAppState.mEphemeralApplicationInfo; |
| } |
| } |
| } |
| } |
| |
| File metadataFile = new File(getEphemeralApplicationDir(packageName, userId), |
| EPHEMERAL_APP_METADATA_FILE); |
| UninstalledEphemeralAppState uninstalledAppState = parseMetadataFile(metadataFile); |
| if (uninstalledAppState == null) { |
| return null; |
| } |
| |
| return uninstalledAppState.mEphemeralApplicationInfo; |
| } |
| |
| private List<UninstalledEphemeralAppState> getUninstalledEphemeralAppStatesLPr(int userId) { |
| List<UninstalledEphemeralAppState> uninstalledAppStates = null; |
| if (mUninstalledEphemeralApps != null) { |
| uninstalledAppStates = mUninstalledEphemeralApps.get(userId); |
| if (uninstalledAppStates != null) { |
| return uninstalledAppStates; |
| } |
| } |
| |
| File ephemeralAppsDir = getEphemeralApplicationsDir(userId); |
| if (ephemeralAppsDir.exists()) { |
| File[] files = ephemeralAppsDir.listFiles(); |
| if (files != null) { |
| for (File ephemeralDir : files) { |
| if (!ephemeralDir.isDirectory()) { |
| continue; |
| } |
| File metadataFile = new File(ephemeralDir, |
| EPHEMERAL_APP_METADATA_FILE); |
| UninstalledEphemeralAppState uninstalledAppState = |
| parseMetadataFile(metadataFile); |
| if (uninstalledAppState == null) { |
| continue; |
| } |
| if (uninstalledAppStates == null) { |
| uninstalledAppStates = new ArrayList<>(); |
| } |
| uninstalledAppStates.add(uninstalledAppState); |
| } |
| } |
| } |
| |
| if (uninstalledAppStates != null) { |
| if (mUninstalledEphemeralApps == null) { |
| mUninstalledEphemeralApps = new SparseArray<>(); |
| } |
| mUninstalledEphemeralApps.put(userId, uninstalledAppStates); |
| } |
| |
| return uninstalledAppStates; |
| } |
| |
| private static boolean isValidCookie(Context context, byte[] cookie) { |
| if (ArrayUtils.isEmpty(cookie)) { |
| return true; |
| } |
| return cookie.length <= context.getPackageManager().getEphemeralCookieMaxSizeBytes(); |
| } |
| |
| private static UninstalledEphemeralAppState parseMetadataFile(File metadataFile) { |
| if (!metadataFile.exists()) { |
| return null; |
| } |
| FileInputStream in; |
| try { |
| in = new AtomicFile(metadataFile).openRead(); |
| } catch (FileNotFoundException fnfe) { |
| Slog.i(LOG_TAG, "No ephemeral metadata file"); |
| return null; |
| } |
| |
| final File ephemeralDir = metadataFile.getParentFile(); |
| final long timestamp = metadataFile.lastModified(); |
| final String packageName = ephemeralDir.getName(); |
| |
| try { |
| XmlPullParser parser = Xml.newPullParser(); |
| parser.setInput(in, StandardCharsets.UTF_8.name()); |
| return new UninstalledEphemeralAppState( |
| parseMetadata(parser, packageName), timestamp); |
| } catch (XmlPullParserException | IOException e) { |
| throw new IllegalStateException("Failed parsing ephemeral" |
| + " metadata file: " + metadataFile, e); |
| } finally { |
| IoUtils.closeQuietly(in); |
| } |
| } |
| |
| private static File computeEphemeralCookieFile(PackageParser.Package pkg, int userId) { |
| File appDir = getEphemeralApplicationDir(pkg.packageName, userId); |
| String cookieFile = EPHEMERAL_APP_COOKIE_FILE_PREFIX + computePackageCertDigest(pkg) |
| + EPHEMERAL_APP_COOKIE_FILE_SIFFIX; |
| return new File(appDir, cookieFile); |
| } |
| |
| private static File peekEphemeralCookieFile(String packageName, int userId) { |
| File appDir = getEphemeralApplicationDir(packageName, userId); |
| if (!appDir.exists()) { |
| return null; |
| } |
| for (File file : appDir.listFiles()) { |
| if (!file.isDirectory() |
| && file.getName().startsWith(EPHEMERAL_APP_COOKIE_FILE_PREFIX) |
| && file.getName().endsWith(EPHEMERAL_APP_COOKIE_FILE_SIFFIX)) { |
| return file; |
| } |
| } |
| return null; |
| } |
| |
| private static EphemeralApplicationInfo parseMetadata(XmlPullParser parser, String packageName) |
| throws IOException, XmlPullParserException { |
| final int outerDepth = parser.getDepth(); |
| while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| if (TAG_PACKAGE.equals(parser.getName())) { |
| return parsePackage(parser, packageName); |
| } |
| } |
| return null; |
| } |
| |
| private static EphemeralApplicationInfo parsePackage(XmlPullParser parser, String packageName) |
| throws IOException, XmlPullParserException { |
| String label = parser.getAttributeValue(null, ATTR_LABEL); |
| |
| List<String> outRequestedPermissions = new ArrayList<>(); |
| List<String> outGrantedPermissions = new ArrayList<>(); |
| |
| final int outerDepth = parser.getDepth(); |
| while (XmlUtils.nextElementWithin(parser, outerDepth)) { |
| if (TAG_PERMS.equals(parser.getName())) { |
| parsePermissions(parser, outRequestedPermissions, outGrantedPermissions); |
| } |
| } |
| |
| String[] requestedPermissions = new String[outRequestedPermissions.size()]; |
| outRequestedPermissions.toArray(requestedPermissions); |
| |
| String[] grantedPermissions = new String[outGrantedPermissions.size()]; |
| outGrantedPermissions.toArray(grantedPermissions); |
| |
| return new EphemeralApplicationInfo(packageName, label, |
| requestedPermissions, grantedPermissions); |
| } |
| |
| private static void parsePermissions(XmlPullParser parser, List<String> outRequestedPermissions, |
| List<String> outGrantedPermissions) throws IOException, XmlPullParserException { |
| final int outerDepth = parser.getDepth(); |
| while (XmlUtils.nextElementWithin(parser,outerDepth)) { |
| if (TAG_PERM.equals(parser.getName())) { |
| String permission = XmlUtils.readStringAttribute(parser, ATTR_NAME); |
| outRequestedPermissions.add(permission); |
| if (XmlUtils.readBooleanAttribute(parser, ATTR_GRANTED)) { |
| outGrantedPermissions.add(permission); |
| } |
| } |
| } |
| } |
| |
| private void writeUninstalledEphemeralAppMetadata( |
| EphemeralApplicationInfo ephemeralApp, int userId) { |
| File appDir = getEphemeralApplicationDir(ephemeralApp.getPackageName(), userId); |
| if (!appDir.exists() && !appDir.mkdirs()) { |
| return; |
| } |
| |
| File metadataFile = new File(appDir, EPHEMERAL_APP_METADATA_FILE); |
| |
| AtomicFile destination = new AtomicFile(metadataFile); |
| FileOutputStream out = null; |
| try { |
| out = destination.startWrite(); |
| |
| XmlSerializer serializer = Xml.newSerializer(); |
| serializer.setOutput(out, StandardCharsets.UTF_8.name()); |
| serializer.setFeature("http://xmlpull.org/v1/doc/features.html#indent-output", true); |
| |
| serializer.startDocument(null, true); |
| |
| serializer.startTag(null, TAG_PACKAGE); |
| serializer.attribute(null, ATTR_LABEL, ephemeralApp.loadLabel( |
| mService.mContext.getPackageManager()).toString()); |
| |
| serializer.startTag(null, TAG_PERMS); |
| for (String permission : ephemeralApp.getRequestedPermissions()) { |
| serializer.startTag(null, TAG_PERM); |
| serializer.attribute(null, ATTR_NAME, permission); |
| if (ArrayUtils.contains(ephemeralApp.getGrantedPermissions(), permission)) { |
| serializer.attribute(null, ATTR_GRANTED, String.valueOf(true)); |
| } |
| serializer.endTag(null, TAG_PERM); |
| } |
| serializer.endTag(null, TAG_PERMS); |
| |
| serializer.endTag(null, TAG_PACKAGE); |
| |
| serializer.endDocument(); |
| destination.finishWrite(out); |
| } catch (Throwable t) { |
| Slog.wtf(LOG_TAG, "Failed to write ephemeral state, restoring backup", t); |
| destination.failWrite(out); |
| } finally { |
| IoUtils.closeQuietly(out); |
| } |
| } |
| |
| private static String computePackageCertDigest(PackageParser.Package pkg) { |
| MessageDigest messageDigest; |
| try { |
| messageDigest = MessageDigest.getInstance("SHA256"); |
| } catch (NoSuchAlgorithmException e) { |
| /* can't happen */ |
| return null; |
| } |
| |
| messageDigest.update(pkg.mSignatures[0].toByteArray()); |
| |
| final byte[] digest = messageDigest.digest(); |
| final int digestLength = digest.length; |
| final int charCount = 2 * digestLength; |
| |
| final char[] chars = new char[charCount]; |
| for (int i = 0; i < digestLength; i++) { |
| final int byteHex = digest[i] & 0xFF; |
| chars[i * 2] = HEX_ARRAY[byteHex >>> 4]; |
| chars[i * 2 + 1] = HEX_ARRAY[byteHex & 0x0F]; |
| } |
| return new String(chars); |
| } |
| |
| private static File getEphemeralApplicationsDir(int userId) { |
| return new File(Environment.getUserSystemDirectory(userId), |
| EPHEMERAL_APPS_FOLDER); |
| } |
| |
| private static File getEphemeralApplicationDir(String packageName, int userId) { |
| return new File (getEphemeralApplicationsDir(userId), packageName); |
| } |
| |
| private static void deleteDir(File dir) { |
| File[] files = dir.listFiles(); |
| if (files != null) { |
| for (File file : dir.listFiles()) { |
| deleteDir(file); |
| } |
| } |
| dir.delete(); |
| } |
| |
| private static final class UninstalledEphemeralAppState { |
| final EphemeralApplicationInfo mEphemeralApplicationInfo; |
| final long mTimestamp; |
| |
| public UninstalledEphemeralAppState(EphemeralApplicationInfo ephemeralApp, |
| long timestamp) { |
| mEphemeralApplicationInfo = ephemeralApp; |
| mTimestamp = timestamp; |
| } |
| } |
| } |