Add check package belong to caller am: 1963f31a52 (625458fa) · Commits · e / os / android_frameworks_base

services/core/java/com/android/server/wallpaper/WallpaperManagerService.java

+24 −1

Original line number	Diff line number	Diff line
		@@ -3007,12 +3007,35 @@ public class WallpaperManagerService extends IWallpaperManager.Stub
		}
		}

		private boolean packageBelongsToUid(String packageName, int uid) {
		int userId = UserHandle.getUserId(uid);
		int packageUid;
		try {
		packageUid = mContext.getPackageManager().getPackageUidAsUser(
		packageName, userId);
		} catch (PackageManager.NameNotFoundException e) {
		return false;
		}
		return packageUid == uid;
		}

		private void enforcePackageBelongsToUid(String packageName, int uid) {
		if (!packageBelongsToUid(packageName, uid)) {
		throw new IllegalArgumentException(
		"Invalid package or package does not belong to uid:"
		+ uid);
		}
		}

		/**
		* Certain user types do not support wallpapers (e.g. managed profiles). The check is
		* implemented through through the OP_WRITE_WALLPAPER AppOp.
		*/
		public boolean isWallpaperSupported(String callingPackage) {
		return mAppOpsManager.checkOpNoThrow(AppOpsManager.OP_WRITE_WALLPAPER, Binder.getCallingUid(),
		final int callingUid = Binder.getCallingUid();
		enforcePackageBelongsToUid(callingPackage, callingUid);

		return mAppOpsManager.checkOpNoThrow(AppOpsManager.OP_WRITE_WALLPAPER, callingUid,
		callingPackage) == AppOpsManager.MODE_ALLOWED;
		}