| /* |
| * Copyright (c) 2007, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package java.nio.file; |
| |
| import java.security.BasicPermission; |
| |
| /** |
| * The {@code Permission} class for link creation operations. |
| * |
| * <p> The following table provides a summary description of what the permission |
| * allows, and discusses the risks of granting code the permission. |
| * |
| * <table class="striped"> |
| * <caption style="display:none">Table shows permission target name, what the permission allows, and associated risks</caption> |
| * <thead> |
| * <tr> |
| * <th scope="col">Permission Target Name</th> |
| * <th scope="col">What the Permission Allows</th> |
| * <th scope="col">Risks of Allowing this Permission</th> |
| * </tr> |
| * </thead> |
| * <tbody> |
| * <tr> |
| * <th scope="row">hard</th> |
| * <td> Ability to add an existing file to a directory. This is sometimes |
| * known as creating a link, or hard link. </td> |
| * <td> Extreme care should be taken when granting this permission. It allows |
| * linking to any file or directory in the file system thus allowing the |
| * attacker access to all files. </td> |
| * </tr> |
| * <tr> |
| * <th scope="row">symbolic</th> |
| * <td> Ability to create symbolic links. </td> |
| * <td> Extreme care should be taken when granting this permission. It allows |
| * linking to any file or directory in the file system thus allowing the |
| * attacker to access to all files. </td> |
| * </tr> |
| * </tbody> |
| * </table> |
| * |
| * @since 1.7 |
| * |
| * @see Files#createLink |
| * @see Files#createSymbolicLink |
| */ |
| public final class LinkPermission extends BasicPermission { |
| static final long serialVersionUID = -1441492453772213220L; |
| |
| private void checkName(String name) { |
| if (!name.equals("hard") && !name.equals("symbolic")) { |
| throw new IllegalArgumentException("name: " + name); |
| } |
| } |
| |
| /** |
| * Constructs a {@code LinkPermission} with the specified name. |
| * |
| * @param name |
| * the name of the permission. It must be "hard" or "symbolic". |
| * |
| * @throws IllegalArgumentException |
| * if name is empty or invalid |
| */ |
| public LinkPermission(String name) { |
| super(name); |
| checkName(name); |
| } |
| |
| /** |
| * Constructs a {@code LinkPermission} with the specified name. |
| * |
| * @param name |
| * the name of the permission; must be "hard" or "symbolic". |
| * @param actions |
| * the actions for the permission; must be the empty string or |
| * {@code null} |
| * |
| * @throws IllegalArgumentException |
| * if name is empty or invalid, or actions is a non-empty string |
| */ |
| public LinkPermission(String name, String actions) { |
| super(name); |
| checkName(name); |
| if (actions != null && actions.length() > 0) { |
| throw new IllegalArgumentException("actions: " + actions); |
| } |
| } |
| } |