author | darcy |
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/* |
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* Copyright (c) 2007, 2019, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.nio.file; |
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import java.security.BasicPermission; |
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/** |
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* The {@code Permission} class for link creation operations. |
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* |
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* <p> The following table provides a summary description of what the permission |
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* allows, and discusses the risks of granting code the permission. |
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* |
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* <table class="striped"> |
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* <caption style="display:none">Table shows permission target name, what the permission allows, and associated risks</caption> |
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* <thead> |
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* <tr> |
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* <th scope="col">Permission Target Name</th> |
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* <th scope="col">What the Permission Allows</th> |
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* <th scope="col">Risks of Allowing this Permission</th> |
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* </tr> |
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* </thead> |
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* <tbody> |
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* <tr> |
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* <th scope="row">hard</th> |
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* <td> Ability to add an existing file to a directory. This is sometimes |
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* known as creating a link, or hard link. </td> |
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* <td> Extreme care should be taken when granting this permission. It allows |
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* linking to any file or directory in the file system thus allowing the |
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* attacker access to all files. </td> |
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* </tr> |
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* <tr> |
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* <th scope="row">symbolic</th> |
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* <td> Ability to create symbolic links. </td> |
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* <td> Extreme care should be taken when granting this permission. It allows |
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* linking to any file or directory in the file system thus allowing the |
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* attacker to access to all files. </td> |
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* </tr> |
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* </tbody> |
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* </table> |
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* |
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* @since 1.7 |
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* |
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* @see Files#createLink |
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* @see Files#createSymbolicLink |
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*/ |
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public final class LinkPermission extends BasicPermission { |
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@java.io.Serial |
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static final long serialVersionUID = -1441492453772213220L; |
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private void checkName(String name) { |
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if (!name.equals("hard") && !name.equals("symbolic")) { |
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throw new IllegalArgumentException("name: " + name); |
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} |
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} |
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/** |
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* Constructs a {@code LinkPermission} with the specified name. |
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* |
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* @param name |
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* the name of the permission. It must be "hard" or "symbolic". |
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* |
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* @throws IllegalArgumentException |
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* if name is empty or invalid |
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*/ |
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public LinkPermission(String name) { |
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super(name); |
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checkName(name); |
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} |
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/** |
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* Constructs a {@code LinkPermission} with the specified name. |
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* |
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* @param name |
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* the name of the permission; must be "hard" or "symbolic". |
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* @param actions |
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* the actions for the permission; must be the empty string or |
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* {@code null} |
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* |
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* @throws IllegalArgumentException |
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* if name is empty or invalid, or actions is a non-empty string |
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*/ |
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public LinkPermission(String name, String actions) { |
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super(name); |
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checkName(name); |
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if (actions != null && !actions.isEmpty()) { |
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throw new IllegalArgumentException("actions: " + actions); |
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} |
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} |
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} |