| /* |
| * Copyright (C) 2008 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.clipboard; |
| |
| import static android.app.ActivityManagerInternal.ALLOW_FULL_ONLY; |
| |
| import android.Manifest; |
| import android.annotation.Nullable; |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManagerInternal; |
| import android.app.AppGlobals; |
| import android.app.AppOpsManager; |
| import android.app.IUriGrantsManager; |
| import android.app.KeyguardManager; |
| import android.app.UriGrantsManager; |
| import android.content.ClipData; |
| import android.content.ClipDescription; |
| import android.content.ComponentName; |
| import android.content.ContentProvider; |
| import android.content.ContentResolver; |
| import android.content.Context; |
| import android.content.IClipboard; |
| import android.content.IOnPrimaryClipChangedListener; |
| import android.content.Intent; |
| import android.content.pm.IPackageManager; |
| import android.content.pm.PackageInfo; |
| import android.content.pm.PackageManager; |
| import android.content.pm.UserInfo; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.IUserManager; |
| import android.os.Parcel; |
| import android.os.RemoteCallbackList; |
| import android.os.RemoteException; |
| import android.os.ServiceManager; |
| import android.os.SystemProperties; |
| import android.os.UserHandle; |
| import android.os.UserManager; |
| import android.provider.Settings; |
| import android.text.TextUtils; |
| import android.util.Slog; |
| import android.util.SparseArray; |
| import android.view.autofill.AutofillManagerInternal; |
| |
| import com.android.server.LocalServices; |
| import com.android.server.SystemService; |
| import com.android.server.contentcapture.ContentCaptureManagerInternal; |
| import com.android.server.uri.UriGrantsManagerInternal; |
| import com.android.server.wm.WindowManagerInternal; |
| |
| import java.io.IOException; |
| import java.io.RandomAccessFile; |
| import java.util.HashSet; |
| import java.util.List; |
| |
| // The following class is Android Emulator specific. It is used to read and |
| // write contents of the host system's clipboard. |
| class HostClipboardMonitor implements Runnable { |
| public interface HostClipboardCallback { |
| void onHostClipboardUpdated(String contents); |
| } |
| |
| private RandomAccessFile mPipe = null; |
| private HostClipboardCallback mHostClipboardCallback; |
| private static final String PIPE_NAME = "pipe:clipboard"; |
| private static final String PIPE_DEVICE = "/dev/qemu_pipe"; |
| |
| private void openPipe() { |
| try { |
| // String.getBytes doesn't include the null terminator, |
| // but the QEMU pipe device requires the pipe service name |
| // to be null-terminated. |
| byte[] b = new byte[PIPE_NAME.length() + 1]; |
| b[PIPE_NAME.length()] = 0; |
| System.arraycopy( |
| PIPE_NAME.getBytes(), |
| 0, |
| b, |
| 0, |
| PIPE_NAME.length()); |
| mPipe = new RandomAccessFile(PIPE_DEVICE, "rw"); |
| mPipe.write(b); |
| } catch (IOException e) { |
| try { |
| if (mPipe != null) mPipe.close(); |
| } catch (IOException ee) {} |
| mPipe = null; |
| } |
| } |
| |
| public HostClipboardMonitor(HostClipboardCallback cb) { |
| mHostClipboardCallback = cb; |
| } |
| |
| @Override |
| public void run() { |
| while(!Thread.interrupted()) { |
| try { |
| // There's no guarantee that QEMU pipes will be ready at the moment |
| // this method is invoked. We simply try to get the pipe open and |
| // retry on failure indefinitely. |
| while (mPipe == null) { |
| openPipe(); |
| Thread.sleep(100); |
| } |
| int size = mPipe.readInt(); |
| size = Integer.reverseBytes(size); |
| byte[] receivedData = new byte[size]; |
| mPipe.readFully(receivedData); |
| mHostClipboardCallback.onHostClipboardUpdated( |
| new String(receivedData)); |
| } catch (IOException e) { |
| try { |
| mPipe.close(); |
| } catch (IOException ee) {} |
| mPipe = null; |
| } catch (InterruptedException e) {} |
| } |
| } |
| |
| public void setHostClipboard(String content) { |
| try { |
| if (mPipe != null) { |
| mPipe.writeInt(Integer.reverseBytes(content.getBytes().length)); |
| mPipe.write(content.getBytes()); |
| } |
| } catch(IOException e) { |
| Slog.e("HostClipboardMonitor", |
| "Failed to set host clipboard " + e.getMessage()); |
| } |
| } |
| } |
| |
| /** |
| * Implementation of the clipboard for copy and paste. |
| * <p> |
| * Caution: exception for clipboard data and isInternalSysWindowAppWithWindowFocus, any of data |
| * is accessed by userId or uid should be in * the try segment between |
| * Binder.clearCallingIdentity and Binder.restoreCallingIdentity. |
| * </p> |
| */ |
| public class ClipboardService extends SystemService { |
| |
| private static final String TAG = "ClipboardService"; |
| private static final boolean IS_EMULATOR = |
| SystemProperties.getBoolean("ro.kernel.qemu", false); |
| |
| private final ActivityManagerInternal mAmInternal; |
| private final IUriGrantsManager mUgm; |
| private final UriGrantsManagerInternal mUgmInternal; |
| private final WindowManagerInternal mWm; |
| private final IUserManager mUm; |
| private final PackageManager mPm; |
| private final AppOpsManager mAppOps; |
| private final ContentCaptureManagerInternal mContentCaptureInternal; |
| private final AutofillManagerInternal mAutofillInternal; |
| private final IBinder mPermissionOwner; |
| private HostClipboardMonitor mHostClipboardMonitor = null; |
| private Thread mHostMonitorThread = null; |
| |
| private final SparseArray<PerUserClipboard> mClipboards = new SparseArray<>(); |
| |
| /** |
| * Instantiates the clipboard. |
| */ |
| public ClipboardService(Context context) { |
| super(context); |
| |
| mAmInternal = LocalServices.getService(ActivityManagerInternal.class); |
| mUgm = UriGrantsManager.getService(); |
| mUgmInternal = LocalServices.getService(UriGrantsManagerInternal.class); |
| mWm = LocalServices.getService(WindowManagerInternal.class); |
| mPm = getContext().getPackageManager(); |
| mUm = (IUserManager) ServiceManager.getService(Context.USER_SERVICE); |
| mAppOps = (AppOpsManager) getContext().getSystemService(Context.APP_OPS_SERVICE); |
| mContentCaptureInternal = LocalServices.getService(ContentCaptureManagerInternal.class); |
| mAutofillInternal = LocalServices.getService(AutofillManagerInternal.class); |
| final IBinder permOwner = mUgmInternal.newUriPermissionOwner("clipboard"); |
| mPermissionOwner = permOwner; |
| if (IS_EMULATOR) { |
| mHostClipboardMonitor = new HostClipboardMonitor( |
| new HostClipboardMonitor.HostClipboardCallback() { |
| @Override |
| public void onHostClipboardUpdated(String contents){ |
| ClipData clip = |
| new ClipData("host clipboard", |
| new String[]{"text/plain"}, |
| new ClipData.Item(contents)); |
| synchronized(mClipboards) { |
| setPrimaryClipInternal(getClipboard(0), clip, |
| android.os.Process.SYSTEM_UID); |
| } |
| } |
| }); |
| mHostMonitorThread = new Thread(mHostClipboardMonitor); |
| mHostMonitorThread.start(); |
| } |
| } |
| |
| @Override |
| public void onStart() { |
| publishBinderService(Context.CLIPBOARD_SERVICE, new ClipboardImpl()); |
| } |
| |
| @Override |
| public void onCleanupUser(int userId) { |
| synchronized (mClipboards) { |
| mClipboards.remove(userId); |
| } |
| } |
| |
| private class ListenerInfo { |
| final int mUid; |
| final String mPackageName; |
| ListenerInfo(int uid, String packageName) { |
| mUid = uid; |
| mPackageName = packageName; |
| } |
| } |
| |
| private class PerUserClipboard { |
| final int userId; |
| |
| final RemoteCallbackList<IOnPrimaryClipChangedListener> primaryClipListeners |
| = new RemoteCallbackList<IOnPrimaryClipChangedListener>(); |
| |
| /** Current primary clip. */ |
| ClipData primaryClip; |
| /** UID that set {@link #primaryClip}. */ |
| int primaryClipUid = android.os.Process.NOBODY_UID; |
| |
| final HashSet<String> activePermissionOwners |
| = new HashSet<String>(); |
| |
| PerUserClipboard(int userId) { |
| this.userId = userId; |
| } |
| } |
| |
| /** |
| * To check if the application has granted the INTERNAL_SYSTEM_WINDOW permission and window |
| * focus. |
| * <p> |
| * All of applications granted INTERNAL_SYSTEM_WINDOW has the risk to leak clip information to |
| * the other user because INTERNAL_SYSTEM_WINDOW is signature level. i.e. platform key. Because |
| * some of applications have both of INTERNAL_SYSTEM_WINDOW and INTERACT_ACROSS_USERS_FULL at |
| * the same time, that means they show the same window to all of users. |
| * </p><p> |
| * Unfortunately, all of applications with INTERNAL_SYSTEM_WINDOW starts very early and then |
| * the real window show is belong to user 0 rather user X. The result of |
| * WindowManager.isUidFocused checking user X window is false. |
| * </p> |
| * @return true if the app granted INTERNAL_SYSTEM_WINDOW permission. |
| */ |
| private boolean isInternalSysWindowAppWithWindowFocus(String callingPackage) { |
| // Shell can access the clipboard for testing purposes. |
| if (mPm.checkPermission(Manifest.permission.INTERNAL_SYSTEM_WINDOW, |
| callingPackage) == PackageManager.PERMISSION_GRANTED) { |
| if (mWm.isUidFocused(Binder.getCallingUid())) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| /** |
| * To get the validate current userId. |
| * <p> |
| * The intending userId needs to be validated by ActivityManagerInternal.handleIncomingUser. |
| * To check if the uid of the process have the permission to run as the userId. |
| * e.x. INTERACT_ACROSS_USERS_FULL or INTERACT_ACROSS_USERS permission granted. |
| * </p> |
| * <p> |
| * The application with the granted INTERNAL_SYSTEM_WINDOW permission should run as the output |
| * of ActivityManagerInternal.handleIncomingUser rather the userId of Binder.getCAllingUid(). |
| * To use the userId of Binder.getCallingUid() is the root cause that leaks the information |
| * comes from user 0 to user X. |
| * </p> |
| * |
| * @param packageName the package name of the calling side |
| * @param userId the userId passed by the calling side |
| * @return return the intending userId that has been validated by ActivityManagerInternal. |
| */ |
| @UserIdInt |
| private int getIntendingUserId(String packageName, @UserIdInt int userId) { |
| final int callingUid = Binder.getCallingUid(); |
| final int callingUserId = UserHandle.getUserId(callingUid); |
| if (!UserManager.supportsMultipleUsers() || callingUserId == userId) { |
| return callingUserId; |
| } |
| |
| int intendingUserId = callingUserId; |
| intendingUserId = mAmInternal.handleIncomingUser(Binder.getCallingPid(), |
| Binder.getCallingUid(), userId, false /* allow all */, ALLOW_FULL_ONLY, |
| "checkClipboardServiceCallingUser", packageName); |
| |
| return intendingUserId; |
| } |
| |
| /** |
| * To get the current running uid who is intend to run as. |
| * In ording to distinguish the nameing and reducing the confusing names, the client client |
| * side pass userId that is intend to run as, |
| * @return return IntentingUid = validated intenting userId + |
| * UserHandle.getAppId(Binder.getCallingUid()) |
| */ |
| private int getIntendingUid(String packageName, @UserIdInt int userId) { |
| return UserHandle.getUid(getIntendingUserId(packageName, userId), |
| UserHandle.getAppId(Binder.getCallingUid())); |
| } |
| |
| /** |
| * To handle the difference between userId and intendingUserId, uid and intendingUid. |
| * |
| * userId means that comes from the calling side and should be validated by |
| * ActivityManagerInternal.handleIncomingUser. |
| * After validation of ActivityManagerInternal.handleIncomingUser, the userId is called |
| * 'intendingUserId' and the uid is called 'intendingUid'. |
| */ |
| private class ClipboardImpl extends IClipboard.Stub { |
| @Override |
| public boolean onTransact(int code, Parcel data, Parcel reply, int flags) |
| throws RemoteException { |
| try { |
| return super.onTransact(code, data, reply, flags); |
| } catch (RuntimeException e) { |
| if (!(e instanceof SecurityException)) { |
| Slog.wtf("clipboard", "Exception: ", e); |
| } |
| throw e; |
| } |
| |
| } |
| |
| @Override |
| public void setPrimaryClip(ClipData clip, String callingPackage, @UserIdInt int userId) { |
| synchronized (this) { |
| if (clip == null || clip.getItemCount() <= 0) { |
| throw new IllegalArgumentException("No items"); |
| } |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_WRITE_CLIPBOARD, callingPackage, |
| intendingUid, intendingUserId)) { |
| return; |
| } |
| checkDataOwnerLocked(clip, intendingUid); |
| setPrimaryClipInternal(clip, intendingUid); |
| } |
| } |
| |
| @Override |
| public void clearPrimaryClip(String callingPackage, @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_WRITE_CLIPBOARD, callingPackage, |
| intendingUid, intendingUserId)) { |
| return; |
| } |
| setPrimaryClipInternal(null, intendingUid); |
| } |
| } |
| |
| @Override |
| public ClipData getPrimaryClip(String pkg, @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(pkg, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, pkg, |
| intendingUid, intendingUserId) |
| || isDeviceLocked(intendingUserId)) { |
| return null; |
| } |
| addActiveOwnerLocked(intendingUid, pkg); |
| return getClipboard(intendingUserId).primaryClip; |
| } |
| } |
| |
| @Override |
| public ClipDescription getPrimaryClipDescription(String callingPackage, |
| @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage, |
| intendingUid, intendingUserId) |
| || isDeviceLocked(intendingUserId)) { |
| return null; |
| } |
| PerUserClipboard clipboard = getClipboard(intendingUserId); |
| return clipboard.primaryClip != null |
| ? clipboard.primaryClip.getDescription() : null; |
| } |
| } |
| |
| @Override |
| public boolean hasPrimaryClip(String callingPackage, @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage, |
| intendingUid, intendingUserId) |
| || isDeviceLocked(intendingUserId)) { |
| return false; |
| } |
| return getClipboard(intendingUserId).primaryClip != null; |
| } |
| } |
| |
| @Override |
| public void addPrimaryClipChangedListener(IOnPrimaryClipChangedListener listener, |
| String callingPackage, @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| getClipboard(intendingUserId).primaryClipListeners.register(listener, |
| new ListenerInfo(intendingUid, callingPackage)); |
| } |
| } |
| |
| @Override |
| public void removePrimaryClipChangedListener(IOnPrimaryClipChangedListener listener, |
| String callingPackage, @UserIdInt int userId) { |
| synchronized (this) { |
| final int intendingUserId = getIntendingUserId(callingPackage, userId); |
| getClipboard(intendingUserId).primaryClipListeners.unregister(listener); |
| } |
| } |
| |
| @Override |
| public boolean hasClipboardText(String callingPackage, int userId) { |
| synchronized (this) { |
| final int intendingUid = getIntendingUid(callingPackage, userId); |
| final int intendingUserId = UserHandle.getUserId(intendingUid); |
| if (!clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, callingPackage, |
| intendingUid, intendingUserId) |
| || isDeviceLocked(intendingUserId)) { |
| return false; |
| } |
| PerUserClipboard clipboard = getClipboard(intendingUserId); |
| if (clipboard.primaryClip != null) { |
| CharSequence text = clipboard.primaryClip.getItemAt(0).getText(); |
| return text != null && text.length() > 0; |
| } |
| return false; |
| } |
| } |
| }; |
| |
| private PerUserClipboard getClipboard(@UserIdInt int userId) { |
| synchronized (mClipboards) { |
| PerUserClipboard puc = mClipboards.get(userId); |
| if (puc == null) { |
| puc = new PerUserClipboard(userId); |
| mClipboards.put(userId, puc); |
| } |
| return puc; |
| } |
| } |
| |
| List<UserInfo> getRelatedProfiles(@UserIdInt int userId) { |
| final List<UserInfo> related; |
| final long origId = Binder.clearCallingIdentity(); |
| try { |
| related = mUm.getProfiles(userId, true); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Remote Exception calling UserManager: " + e); |
| return null; |
| } finally{ |
| Binder.restoreCallingIdentity(origId); |
| } |
| return related; |
| } |
| |
| /** Check if the user has the given restriction set. Default to true if error occured during |
| * calling UserManager, so it fails safe. |
| */ |
| private boolean hasRestriction(String restriction, int userId) { |
| try { |
| return mUm.hasUserRestriction(restriction, userId); |
| } catch (RemoteException e) { |
| Slog.e(TAG, "Remote Exception calling UserManager.getUserRestrictions: ", e); |
| // Fails safe |
| return true; |
| } |
| } |
| |
| void setPrimaryClipInternal(@Nullable ClipData clip, int uid) { |
| // Push clipboard to host, if any |
| if (mHostClipboardMonitor != null) { |
| if (clip == null) { |
| // Someone really wants the clipboard cleared, so push empty |
| mHostClipboardMonitor.setHostClipboard(""); |
| } else if (clip.getItemCount() > 0) { |
| final CharSequence text = clip.getItemAt(0).getText(); |
| if (text != null) { |
| mHostClipboardMonitor.setHostClipboard(text.toString()); |
| } |
| } |
| } |
| |
| // Update this user |
| final int userId = UserHandle.getUserId(uid); |
| setPrimaryClipInternal(getClipboard(userId), clip, uid); |
| |
| // Update related users |
| List<UserInfo> related = getRelatedProfiles(userId); |
| if (related != null) { |
| int size = related.size(); |
| if (size > 1) { // Related profiles list include the current profile. |
| final boolean canCopy = !hasRestriction( |
| UserManager.DISALLOW_CROSS_PROFILE_COPY_PASTE, userId); |
| // Copy clip data to related users if allowed. If disallowed, then remove |
| // primary clip in related users to prevent pasting stale content. |
| if (!canCopy) { |
| clip = null; |
| } else if (clip == null) { |
| // do nothing for canCopy == true and clip == null case |
| // To prevent from NPE happen in 'new ClipData(clip)' when run |
| // android.content.cts.ClipboardManagerTest#testClearPrimaryClip |
| } else { |
| // We want to fix the uris of the related user's clip without changing the |
| // uris of the current user's clip. |
| // So, copy the ClipData, and then copy all the items, so that nothing |
| // is shared in memory. |
| clip = new ClipData(clip); |
| for (int i = clip.getItemCount() - 1; i >= 0; i--) { |
| clip.setItemAt(i, new ClipData.Item(clip.getItemAt(i))); |
| } |
| clip.fixUrisLight(userId); |
| } |
| for (int i = 0; i < size; i++) { |
| int id = related.get(i).id; |
| if (id != userId) { |
| final boolean canCopyIntoProfile = !hasRestriction( |
| UserManager.DISALLOW_SHARE_INTO_MANAGED_PROFILE, id); |
| if (canCopyIntoProfile) { |
| setPrimaryClipInternal(getClipboard(id), clip, uid); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| void setPrimaryClipInternal(PerUserClipboard clipboard, @Nullable ClipData clip, |
| int uid) { |
| revokeUris(clipboard); |
| clipboard.activePermissionOwners.clear(); |
| if (clip == null && clipboard.primaryClip == null) { |
| return; |
| } |
| clipboard.primaryClip = clip; |
| if (clip != null) { |
| clipboard.primaryClipUid = uid; |
| } else { |
| clipboard.primaryClipUid = android.os.Process.NOBODY_UID; |
| } |
| if (clip != null) { |
| final ClipDescription description = clip.getDescription(); |
| if (description != null) { |
| description.setTimestamp(System.currentTimeMillis()); |
| } |
| } |
| final long ident = Binder.clearCallingIdentity(); |
| final int n = clipboard.primaryClipListeners.beginBroadcast(); |
| try { |
| for (int i = 0; i < n; i++) { |
| try { |
| ListenerInfo li = (ListenerInfo) |
| clipboard.primaryClipListeners.getBroadcastCookie(i); |
| |
| if (clipboardAccessAllowed(AppOpsManager.OP_READ_CLIPBOARD, li.mPackageName, |
| li.mUid, UserHandle.getUserId(li.mUid))) { |
| clipboard.primaryClipListeners.getBroadcastItem(i) |
| .dispatchPrimaryClipChanged(); |
| } |
| } catch (RemoteException e) { |
| // The RemoteCallbackList will take care of removing |
| // the dead object for us. |
| } |
| } |
| } finally { |
| clipboard.primaryClipListeners.finishBroadcast(); |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private boolean isDeviceLocked(@UserIdInt int userId) { |
| final long token = Binder.clearCallingIdentity(); |
| try { |
| final KeyguardManager keyguardManager = getContext().getSystemService( |
| KeyguardManager.class); |
| return keyguardManager != null && keyguardManager.isDeviceLocked(userId); |
| } finally { |
| Binder.restoreCallingIdentity(token); |
| } |
| } |
| |
| private final void checkUriOwnerLocked(Uri uri, int sourceUid) { |
| if (uri == null || !ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) return; |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| // This will throw SecurityException if caller can't grant |
| mUgmInternal.checkGrantUriPermission(sourceUid, null, |
| ContentProvider.getUriWithoutUserId(uri), |
| Intent.FLAG_GRANT_READ_URI_PERMISSION, |
| ContentProvider.getUserIdFromUri(uri, UserHandle.getUserId(sourceUid))); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private final void checkItemOwnerLocked(ClipData.Item item, int uid) { |
| if (item.getUri() != null) { |
| checkUriOwnerLocked(item.getUri(), uid); |
| } |
| Intent intent = item.getIntent(); |
| if (intent != null && intent.getData() != null) { |
| checkUriOwnerLocked(intent.getData(), uid); |
| } |
| } |
| |
| private final void checkDataOwnerLocked(ClipData data, int uid) { |
| final int N = data.getItemCount(); |
| for (int i=0; i<N; i++) { |
| checkItemOwnerLocked(data.getItemAt(i), uid); |
| } |
| } |
| |
| private final void grantUriLocked(Uri uri, int sourceUid, String targetPkg, |
| int targetUserId) { |
| if (uri == null || !ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) return; |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mUgm.grantUriPermissionFromOwner(mPermissionOwner, sourceUid, targetPkg, |
| ContentProvider.getUriWithoutUserId(uri), |
| Intent.FLAG_GRANT_READ_URI_PERMISSION, |
| ContentProvider.getUserIdFromUri(uri, UserHandle.getUserId(sourceUid)), |
| targetUserId); |
| } catch (RemoteException ignored) { |
| // Ignored because we're in same process |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private final void grantItemLocked(ClipData.Item item, int sourceUid, String targetPkg, |
| int targetUserId) { |
| if (item.getUri() != null) { |
| grantUriLocked(item.getUri(), sourceUid, targetPkg, targetUserId); |
| } |
| Intent intent = item.getIntent(); |
| if (intent != null && intent.getData() != null) { |
| grantUriLocked(intent.getData(), sourceUid, targetPkg, targetUserId); |
| } |
| } |
| |
| private final void addActiveOwnerLocked(int uid, String pkg) { |
| final IPackageManager pm = AppGlobals.getPackageManager(); |
| final int targetUserHandle = UserHandle.getCallingUserId(); |
| final long oldIdentity = Binder.clearCallingIdentity(); |
| try { |
| PackageInfo pi = pm.getPackageInfo(pkg, 0, targetUserHandle); |
| if (pi == null) { |
| throw new IllegalArgumentException("Unknown package " + pkg); |
| } |
| if (!UserHandle.isSameApp(pi.applicationInfo.uid, uid)) { |
| throw new SecurityException("Calling uid " + uid |
| + " does not own package " + pkg); |
| } |
| } catch (RemoteException e) { |
| // Can't happen; the package manager is in the same process |
| } finally { |
| Binder.restoreCallingIdentity(oldIdentity); |
| } |
| PerUserClipboard clipboard = getClipboard(UserHandle.getUserId(uid)); |
| if (clipboard.primaryClip != null && !clipboard.activePermissionOwners.contains(pkg)) { |
| final int N = clipboard.primaryClip.getItemCount(); |
| for (int i=0; i<N; i++) { |
| grantItemLocked(clipboard.primaryClip.getItemAt(i), clipboard.primaryClipUid, pkg, |
| UserHandle.getUserId(uid)); |
| } |
| clipboard.activePermissionOwners.add(pkg); |
| } |
| } |
| |
| private final void revokeUriLocked(Uri uri, int sourceUid) { |
| if (uri == null || !ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) return; |
| |
| final long ident = Binder.clearCallingIdentity(); |
| try { |
| mUgmInternal.revokeUriPermissionFromOwner(mPermissionOwner, |
| ContentProvider.getUriWithoutUserId(uri), |
| Intent.FLAG_GRANT_READ_URI_PERMISSION, |
| ContentProvider.getUserIdFromUri(uri, UserHandle.getUserId(sourceUid))); |
| } finally { |
| Binder.restoreCallingIdentity(ident); |
| } |
| } |
| |
| private final void revokeItemLocked(ClipData.Item item, int sourceUid) { |
| if (item.getUri() != null) { |
| revokeUriLocked(item.getUri(), sourceUid); |
| } |
| Intent intent = item.getIntent(); |
| if (intent != null && intent.getData() != null) { |
| revokeUriLocked(intent.getData(), sourceUid); |
| } |
| } |
| |
| private final void revokeUris(PerUserClipboard clipboard) { |
| if (clipboard.primaryClip == null) { |
| return; |
| } |
| final int N = clipboard.primaryClip.getItemCount(); |
| for (int i=0; i<N; i++) { |
| revokeItemLocked(clipboard.primaryClip.getItemAt(i), clipboard.primaryClipUid); |
| } |
| } |
| |
| private boolean clipboardAccessAllowed(int op, String callingPackage, int uid, |
| @UserIdInt int userId) { |
| // Check the AppOp. |
| if (mAppOps.noteOp(op, uid, callingPackage) != AppOpsManager.MODE_ALLOWED) { |
| return false; |
| } |
| // Shell can access the clipboard for testing purposes. |
| if (mPm.checkPermission(android.Manifest.permission.READ_CLIPBOARD_IN_BACKGROUND, |
| callingPackage) == PackageManager.PERMISSION_GRANTED) { |
| return true; |
| } |
| // The default IME is always allowed to access the clipboard. |
| String defaultIme = Settings.Secure.getStringForUser(getContext().getContentResolver(), |
| Settings.Secure.DEFAULT_INPUT_METHOD, userId); |
| if (!TextUtils.isEmpty(defaultIme)) { |
| final String imePkg = ComponentName.unflattenFromString(defaultIme).getPackageName(); |
| if (imePkg.equals(callingPackage)) { |
| return true; |
| } |
| } |
| |
| switch (op) { |
| case AppOpsManager.OP_READ_CLIPBOARD: |
| // Clipboard can only be read by applications with focus.. |
| // or the application have the INTERNAL_SYSTEM_WINDOW and INTERACT_ACROSS_USERS_FULL |
| // at the same time. e.x. SystemUI. It needs to check the window focus of |
| // Binder.getCallingUid(). Without checking, the user X can't copy any thing from |
| // INTERNAL_SYSTEM_WINDOW to the other applications. |
| boolean allowed = mWm.isUidFocused(uid) |
| || isInternalSysWindowAppWithWindowFocus(callingPackage); |
| if (!allowed && mContentCaptureInternal != null) { |
| // ...or the Content Capture Service |
| // The uid parameter of mContentCaptureInternal.isContentCaptureServiceForUser |
| // is used to check if the uid has the permission BIND_CONTENT_CAPTURE_SERVICE. |
| // if the application has the permission, let it to access user's clipboard. |
| // To passed synthesized uid user#10_app#systemui may not tell the real uid. |
| // userId must pass intending userId. i.e. user#10. |
| allowed = mContentCaptureInternal.isContentCaptureServiceForUser(uid, userId); |
| } |
| if (!allowed && mAutofillInternal != null) { |
| // ...or the Augmented Autofill Service |
| // The uid parameter of mAutofillInternal.isAugmentedAutofillServiceForUser |
| // is used to check if the uid has the permission BIND_AUTOFILL_SERVICE. |
| // if the application has the permission, let it to access user's clipboard. |
| // To passed synthesized uid user#10_app#systemui may not tell the real uid. |
| // userId must pass intending userId. i.e. user#10. |
| allowed = mAutofillInternal.isAugmentedAutofillServiceForUser(uid, userId); |
| } |
| if (!allowed) { |
| Slog.e(TAG, "Denying clipboard access to " + callingPackage |
| + ", application is not in focus neither is a system service for " |
| + "user " + userId); |
| } |
| return allowed; |
| case AppOpsManager.OP_WRITE_CLIPBOARD: |
| // Writing is allowed without focus. |
| return true; |
| default: |
| throw new IllegalArgumentException("Unknown clipboard appop " + op); |
| } |
| } |
| } |
