| /* |
| * Copyright (C) 2017 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.job; |
| |
| import android.app.IActivityManager; |
| import android.app.UriGrantsManager; |
| import android.content.ClipData; |
| import android.content.ContentProvider; |
| import android.content.Intent; |
| import android.net.Uri; |
| import android.os.IBinder; |
| import android.os.RemoteException; |
| import android.os.UserHandle; |
| import android.util.Slog; |
| import android.util.proto.ProtoOutputStream; |
| import com.android.server.LocalServices; |
| import com.android.server.uri.UriGrantsManagerInternal; |
| |
| import java.io.PrintWriter; |
| import java.util.ArrayList; |
| |
| public final class GrantedUriPermissions { |
| private final int mGrantFlags; |
| private final int mSourceUserId; |
| private final String mTag; |
| private final IBinder mPermissionOwner; |
| private final ArrayList<Uri> mUris = new ArrayList<>(); |
| |
| private GrantedUriPermissions(IActivityManager am, int grantFlags, int uid, String tag) |
| throws RemoteException { |
| mGrantFlags = grantFlags; |
| mSourceUserId = UserHandle.getUserId(uid); |
| mTag = tag; |
| mPermissionOwner = LocalServices |
| .getService(UriGrantsManagerInternal.class).newUriPermissionOwner("job: " + tag); |
| } |
| |
| public void revoke(IActivityManager am) { |
| for (int i = mUris.size()-1; i >= 0; i--) { |
| LocalServices.getService(UriGrantsManagerInternal.class).revokeUriPermissionFromOwner( |
| mPermissionOwner, mUris.get(i), mGrantFlags, mSourceUserId); |
| } |
| mUris.clear(); |
| } |
| |
| public static boolean checkGrantFlags(int grantFlags) { |
| return (grantFlags & (Intent.FLAG_GRANT_WRITE_URI_PERMISSION |
| |Intent.FLAG_GRANT_READ_URI_PERMISSION)) != 0; |
| } |
| |
| public static GrantedUriPermissions createFromIntent(IActivityManager am, Intent intent, |
| int sourceUid, String targetPackage, int targetUserId, String tag) { |
| int grantFlags = intent.getFlags(); |
| if (!checkGrantFlags(grantFlags)) { |
| return null; |
| } |
| |
| GrantedUriPermissions perms = null; |
| |
| Uri data = intent.getData(); |
| if (data != null) { |
| perms = grantUri(am, data, sourceUid, targetPackage, targetUserId, grantFlags, tag, |
| perms); |
| } |
| |
| ClipData clip = intent.getClipData(); |
| if (clip != null) { |
| perms = grantClip(am, clip, sourceUid, targetPackage, targetUserId, grantFlags, tag, |
| perms); |
| } |
| |
| return perms; |
| } |
| |
| public static GrantedUriPermissions createFromClip(IActivityManager am, ClipData clip, |
| int sourceUid, String targetPackage, int targetUserId, int grantFlags, String tag) { |
| if (!checkGrantFlags(grantFlags)) { |
| return null; |
| } |
| GrantedUriPermissions perms = null; |
| if (clip != null) { |
| perms = grantClip(am, clip, sourceUid, targetPackage, targetUserId, grantFlags, |
| tag, perms); |
| } |
| return perms; |
| } |
| |
| private static GrantedUriPermissions grantClip(IActivityManager am, ClipData clip, |
| int sourceUid, String targetPackage, int targetUserId, int grantFlags, String tag, |
| GrantedUriPermissions curPerms) { |
| final int N = clip.getItemCount(); |
| for (int i = 0; i < N; i++) { |
| curPerms = grantItem(am, clip.getItemAt(i), sourceUid, targetPackage, targetUserId, |
| grantFlags, tag, curPerms); |
| } |
| return curPerms; |
| } |
| |
| private static GrantedUriPermissions grantUri(IActivityManager am, Uri uri, |
| int sourceUid, String targetPackage, int targetUserId, int grantFlags, String tag, |
| GrantedUriPermissions curPerms) { |
| try { |
| int sourceUserId = ContentProvider.getUserIdFromUri(uri, |
| UserHandle.getUserId(sourceUid)); |
| uri = ContentProvider.getUriWithoutUserId(uri); |
| if (curPerms == null) { |
| curPerms = new GrantedUriPermissions(am, grantFlags, sourceUid, tag); |
| } |
| UriGrantsManager.getService().grantUriPermissionFromOwner(curPerms.mPermissionOwner, |
| sourceUid, targetPackage, uri, grantFlags, sourceUserId, targetUserId); |
| curPerms.mUris.add(uri); |
| } catch (RemoteException e) { |
| Slog.e("JobScheduler", "AM dead"); |
| } |
| return curPerms; |
| } |
| |
| private static GrantedUriPermissions grantItem(IActivityManager am, ClipData.Item item, |
| int sourceUid, String targetPackage, int targetUserId, int grantFlags, String tag, |
| GrantedUriPermissions curPerms) { |
| if (item.getUri() != null) { |
| curPerms = grantUri(am, item.getUri(), sourceUid, targetPackage, targetUserId, |
| grantFlags, tag, curPerms); |
| } |
| Intent intent = item.getIntent(); |
| if (intent != null && intent.getData() != null) { |
| curPerms = grantUri(am, intent.getData(), sourceUid, targetPackage, targetUserId, |
| grantFlags, tag, curPerms); |
| } |
| return curPerms; |
| } |
| |
| // Dumpsys infrastructure |
| public void dump(PrintWriter pw, String prefix) { |
| pw.print(prefix); pw.print("mGrantFlags=0x"); pw.print(Integer.toHexString(mGrantFlags)); |
| pw.print(" mSourceUserId="); pw.println(mSourceUserId); |
| pw.print(prefix); pw.print("mTag="); pw.println(mTag); |
| pw.print(prefix); pw.print("mPermissionOwner="); pw.println(mPermissionOwner); |
| for (int i = 0; i < mUris.size(); i++) { |
| pw.print(prefix); pw.print("#"); pw.print(i); pw.print(": "); |
| pw.println(mUris.get(i)); |
| } |
| } |
| |
| public void dump(ProtoOutputStream proto, long fieldId) { |
| final long token = proto.start(fieldId); |
| |
| proto.write(GrantedUriPermissionsDumpProto.FLAGS, mGrantFlags); |
| proto.write(GrantedUriPermissionsDumpProto.SOURCE_USER_ID, mSourceUserId); |
| proto.write(GrantedUriPermissionsDumpProto.TAG, mTag); |
| proto.write(GrantedUriPermissionsDumpProto.PERMISSION_OWNER, mPermissionOwner.toString()); |
| for (int i = 0; i < mUris.size(); i++) { |
| Uri u = mUris.get(i); |
| if (u != null) { |
| proto.write(GrantedUriPermissionsDumpProto.URIS, u.toString()); |
| } |
| } |
| |
| proto.end(token); |
| } |
| } |