| /* |
| ** Copyright 2016, 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; |
| |
| import android.annotation.NonNull; |
| import android.annotation.UserIdInt; |
| import android.app.ActivityManagerNative; |
| import android.content.Intent; |
| import android.net.Uri; |
| import android.os.Binder; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| |
| import com.android.internal.annotations.GuardedBy; |
| import com.android.internal.inputmethod.IInputContentUriToken; |
| |
| final class InputContentUriTokenHandler extends IInputContentUriToken.Stub { |
| |
| @NonNull |
| private final Uri mUri; |
| private final int mSourceUid; |
| @NonNull |
| private final String mTargetPackage; |
| @UserIdInt |
| private final int mSourceUserId; |
| @UserIdInt |
| private final int mTargetUserId; |
| |
| private final Object mLock = new Object(); |
| |
| @GuardedBy("mLock") |
| private IBinder mPermissionOwnerToken = null; |
| |
| InputContentUriTokenHandler(@NonNull Uri contentUri, int sourceUid, |
| @NonNull String targetPackage, @UserIdInt int sourceUserId, |
| @UserIdInt int targetUserId) { |
| mUri = contentUri; |
| mSourceUid = sourceUid; |
| mTargetPackage = targetPackage; |
| mSourceUserId = sourceUserId; |
| mTargetUserId = targetUserId; |
| } |
| |
| @Override |
| public void take() { |
| synchronized (mLock) { |
| if (mPermissionOwnerToken != null) { |
| // Permission is already granted. |
| return; |
| } |
| |
| try { |
| mPermissionOwnerToken = ActivityManagerNative.getDefault() |
| .newUriPermissionOwner("InputContentUriTokenHandler"); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } |
| |
| doTakeLocked(mPermissionOwnerToken); |
| } |
| } |
| |
| private void doTakeLocked(@NonNull IBinder permissionOwner) { |
| long origId = Binder.clearCallingIdentity(); |
| try { |
| try { |
| ActivityManagerNative.getDefault().grantUriPermissionFromOwner( |
| permissionOwner, mSourceUid, mTargetPackage, mUri, |
| Intent.FLAG_GRANT_READ_URI_PERMISSION, mSourceUserId, mTargetUserId); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } |
| } finally { |
| Binder.restoreCallingIdentity(origId); |
| } |
| } |
| |
| @Override |
| public void release() { |
| synchronized (mLock) { |
| if (mPermissionOwnerToken == null) { |
| return; |
| } |
| try { |
| ActivityManagerNative.getDefault().revokeUriPermissionFromOwner( |
| mPermissionOwnerToken, mUri, |
| Intent.FLAG_GRANT_READ_URI_PERMISSION, mSourceUserId); |
| } catch (RemoteException e) { |
| e.rethrowFromSystemServer(); |
| } finally { |
| mPermissionOwnerToken = null; |
| } |
| } |
| } |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| protected void finalize() throws Throwable { |
| try { |
| release(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| } |