/* * Copyright (c) 2005, 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 com.sun.tools.attach; /** * When a {@link java.lang.SecurityManager SecurityManager} set, this * is the permission which will be checked when code invokes {@link * VirtualMachine#attach VirtalMachine.attach} to attach to a target virtual * machine. * This permission is also checked when an {@link * com.sun.tools.attach.spi.AttachProvider AttachProvider} is created.
* * An AttachPermission
object contains a name (also referred
* to as a "target name") but no actions list; you either have the
* named permission or you don't.
* The following table provides a summary description of what the
* permission allows, and discusses the risks of granting code the
* permission.
*
*
Permission Target Name | *What the Permission Allows | *Risks of Allowing this Permission | *
---|---|---|
attachVirtualMachine | *Ability to attach to another Java virtual machine and load agents * into that VM. * | *This allows an attacker to control the target VM which can potentially * cause it to misbehave. * | *
createAttachProvider | *Ability to create an AttachProvider instance.
* |
* This allows an attacker to create an AttachProvider which can * potentially be used to attach to other Java virtual machines. * | *
* Programmers do not normally create AttachPermission objects directly.
* Instead they are created by the security policy code based on reading
* the security policy file.
*
* @see com.sun.tools.attach.VirtualMachine
* @see com.sun.tools.attach.spi.AttachProvider
*/
public final class AttachPermission extends java.security.BasicPermission {
/** use serialVersionUID for interoperability */
static final long serialVersionUID = -4619447669752976181L;
/**
* Constructs a new AttachPermission object.
*
* @param name Permission name. Must be either "attachVirtualMachine",
* or "createAttachProvider".
*
* @throws NullPointerException if name is null
.
* @throws IllegalArgumentException if the name is invalid.
*/
public AttachPermission(String name) {
super(name);
if (!name.equals("attachVirtualMachine") && !name.equals("createAttachProvider")) {
throw new IllegalArgumentException("name: " + name);
}
}
/**
* Constructs a new AttachPermission object.
*
* @param name Permission name. Must be either "attachVirtualMachine",
* or "createAttachProvider".
*
* @param actions Not used and should be null
, or
* the empty string.
*
* @throws NullPointerException if name is null
.
* @throws IllegalArgumentException if arguments are invalid.
*/
public AttachPermission(String name, String actions) {
super(name);
if (!name.equals("attachVirtualMachine") && !name.equals("createAttachProvider")) {
throw new IllegalArgumentException("name: " + name);
}
if (actions != null && actions.length() > 0) {
throw new IllegalArgumentException("actions: " + actions);
}
}
}