1 /*
   2  * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.security.util;
  27 
  28 import sun.security.action.GetPropertyAction;
  29 
  30 import java.io.FilePermission;
  31 import java.security.Permission;
  32 import jdk.internal.misc.SharedSecrets;
  33 
  34 /**
  35  * Take care of FilePermission compatibility after JDK-8164705.
  36  */
  37 public class FilePermCompat {
  38     /**
  39      * New behavior? Keep compatibility? Both default true.
  40      */
  41     public static final boolean nb;
  42     public static final boolean compat;
  43 
  44     static {
  45         String flag = GetPropertyAction.privilegedGetProperty(
  46                 "jdk.io.permissionsUseCanonicalPath", "false");
  47         switch (flag) {
  48             case "true":
  49                 nb = false;
  50                 compat = false;
  51                 break;
  52             case "false":
  53                 nb = true;
  54                 compat = true;
  55                 break;
  56             default:
  57                 throw new RuntimeException(
  58                         "Invalid jdk.io.permissionsUseCanonicalPath: " + flag);
  59         }
  60     }
  61 
  62     public static Permission newPermPlusAltPath(Permission input) {
  63         if (compat && input instanceof FilePermission) {
  64             return SharedSecrets.getJavaIOFilePermissionAccess()
  65                     .newPermPlusAltPath((FilePermission) input);
  66         }
  67         return input;
  68     }
  69 
  70     public static Permission newPermUsingAltPath(Permission input) {
  71         if (input instanceof FilePermission) {
  72             return SharedSecrets.getJavaIOFilePermissionAccess()
  73                     .newPermUsingAltPath((FilePermission) input);
  74         }
  75         return null;
  76     }
  77 }