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/*
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* Copyright (c) 1997, 2003, 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.util;
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import java.io.Serializable;
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import java.io.IOException;
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import java.security.*;
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import java.util.Map;
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import java.util.HashMap;
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import java.util.Enumeration;
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import java.util.Hashtable;
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import java.util.Collections;
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import java.io.ObjectStreamField;
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import java.io.ObjectOutputStream;
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import java.io.ObjectInputStream;
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import java.io.IOException;
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import sun.security.util.SecurityConstants;
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/**
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* This class is for property permissions.
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*
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* <P>
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* The name is the name of the property ("java.home",
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* "os.name", etc). The naming
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* convention follows the hierarchical property naming convention.
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* Also, an asterisk
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* may appear at the end of the name, following a ".", or by itself, to
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* signify a wildcard match. For example: "java.*" or "*" is valid,
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* "*java" or "a*b" is not valid.
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* <P>
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* <P>
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* The actions to be granted are passed to the constructor in a string containing
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* a list of one or more comma-separated keywords. The possible keywords are
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* "read" and "write". Their meaning is defined as follows:
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* <P>
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* <DL>
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* <DT> read
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* <DD> read permission. Allows <code>System.getProperty</code> to
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* be called.
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* <DT> write
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* <DD> write permission. Allows <code>System.setProperty</code> to
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* be called.
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* </DL>
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* <P>
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* The actions string is converted to lowercase before processing.
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* <P>
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* Care should be taken before granting code permission to access
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* certain system properties. For example, granting permission to
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* access the "java.home" system property gives potentially malevolent
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* code sensitive information about the system environment (the Java
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* installation directory). Also, granting permission to access
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* the "user.name" and "user.home" system properties gives potentially
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* malevolent code sensitive information about the user environment
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* (the user's account name and home directory).
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*
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* @see java.security.BasicPermission
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* @see java.security.Permission
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* @see java.security.Permissions
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* @see java.security.PermissionCollection
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* @see java.lang.SecurityManager
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*
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*
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* @author Roland Schemers
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* @since 1.2
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*
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* @serial exclude
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*/
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public final class PropertyPermission extends BasicPermission {
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/**
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* Read action.
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*/
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private final static int READ = 0x1;
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/**
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* Write action.
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*/
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private final static int WRITE = 0x2;
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/**
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* All actions (read,write);
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*/
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private final static int ALL = READ|WRITE;
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/**
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* No actions.
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*/
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private final static int NONE = 0x0;
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/**
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* The actions mask.
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*
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*/
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private transient int mask;
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/**
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* The actions string.
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*
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* @serial
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*/
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private String actions; // Left null as long as possible, then
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// created and re-used in the getAction function.
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/**
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* initialize a PropertyPermission object. Common to all constructors.
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* Also called during de-serialization.
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*
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* @param mask the actions mask to use.
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*
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*/
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private void init(int mask)
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{
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if ((mask & ALL) != mask)
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throw new IllegalArgumentException("invalid actions mask");
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if (mask == NONE)
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throw new IllegalArgumentException("invalid actions mask");
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if (getName() == null)
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throw new NullPointerException("name can't be null");
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this.mask = mask;
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}
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/**
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* Creates a new PropertyPermission object with the specified name.
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* The name is the name of the system property, and
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* <i>actions</i> contains a comma-separated list of the
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* desired actions granted on the property. Possible actions are
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* "read" and "write".
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*
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* @param name the name of the PropertyPermission.
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* @param actions the actions string.
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*
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* @throws NullPointerException if <code>name</code> is <code>null</code>.
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* @throws IllegalArgumentException if <code>name</code> is empty or if
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* <code>actions</code> is invalid.
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*/
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public PropertyPermission(String name, String actions)
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{
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super(name,actions);
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init(getMask(actions));
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}
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/**
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* Checks if this PropertyPermission object "implies" the specified
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* permission.
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* <P>
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* More specifically, this method returns true if:<p>
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* <ul>
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* <li> <i>p</i> is an instanceof PropertyPermission,<p>
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* <li> <i>p</i>'s actions are a subset of this
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* object's actions, and <p>
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* <li> <i>p</i>'s name is implied by this object's
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* name. For example, "java.*" implies "java.home".
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* </ul>
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* @param p the permission to check against.
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*
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* @return true if the specified permission is implied by this object,
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* false if not.
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*/
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public boolean implies(Permission p) {
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if (!(p instanceof PropertyPermission))
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return false;
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PropertyPermission that = (PropertyPermission) p;
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// we get the effective mask. i.e., the "and" of this and that.
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// They must be equal to that.mask for implies to return true.
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return ((this.mask & that.mask) == that.mask) && super.implies(that);
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}
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/**
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* Checks two PropertyPermission objects for equality. Checks that <i>obj</i> is
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* a PropertyPermission, and has the same name and actions as this object.
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* <P>
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* @param obj the object we are testing for equality with this object.
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* @return true if obj is a PropertyPermission, and has the same name and
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* actions as this PropertyPermission object.
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*/
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public boolean equals(Object obj) {
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if (obj == this)
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return true;
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if (! (obj instanceof PropertyPermission))
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return false;
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PropertyPermission that = (PropertyPermission) obj;
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return (this.mask == that.mask) &&
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(this.getName().equals(that.getName()));
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}
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/**
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* Returns the hash code value for this object.
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* The hash code used is the hash code of this permissions name, that is,
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* <code>getName().hashCode()</code>, where <code>getName</code> is
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* from the Permission superclass.
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*
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* @return a hash code value for this object.
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*/
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public int hashCode() {
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return this.getName().hashCode();
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}
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/**
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* Converts an actions String to an actions mask.
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*
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* @param action the action string.
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* @return the actions mask.
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*/
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private static int getMask(String actions) {
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int mask = NONE;
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if (actions == null) {
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return mask;
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}
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// Check against use of constants (used heavily within the JDK)
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if (actions == SecurityConstants.PROPERTY_READ_ACTION) {
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return READ;
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} if (actions == SecurityConstants.PROPERTY_WRITE_ACTION) {
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return WRITE;
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} else if (actions == SecurityConstants.PROPERTY_RW_ACTION) {
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return READ|WRITE;
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}
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char[] a = actions.toCharArray();
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int i = a.length - 1;
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if (i < 0)
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return mask;
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while (i != -1) {
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char c;
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// skip whitespace
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while ((i!=-1) && ((c = a[i]) == ' ' ||
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c == '\r' ||
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c == '\n' ||
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c == '\f' ||
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c == '\t'))
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i--;
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// check for the known strings
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int matchlen;
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if (i >= 3 && (a[i-3] == 'r' || a[i-3] == 'R') &&
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(a[i-2] == 'e' || a[i-2] == 'E') &&
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(a[i-1] == 'a' || a[i-1] == 'A') &&
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(a[i] == 'd' || a[i] == 'D'))
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{
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matchlen = 4;
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mask |= READ;
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} else if (i >= 4 && (a[i-4] == 'w' || a[i-4] == 'W') &&
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(a[i-3] == 'r' || a[i-3] == 'R') &&
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(a[i-2] == 'i' || a[i-2] == 'I') &&
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(a[i-1] == 't' || a[i-1] == 'T') &&
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(a[i] == 'e' || a[i] == 'E'))
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{
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matchlen = 5;
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mask |= WRITE;
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} else {
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// parse error
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throw new IllegalArgumentException(
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"invalid permission: " + actions);
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}
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// make sure we didn't just match the tail of a word
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// like "ackbarfaccept". Also, skip to the comma.
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boolean seencomma = false;
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while (i >= matchlen && !seencomma) {
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switch(a[i-matchlen]) {
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case ',':
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seencomma = true;
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/*FALLTHROUGH*/
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case ' ': case '\r': case '\n':
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case '\f': case '\t':
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break;
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default:
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throw new IllegalArgumentException(
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"invalid permission: " + actions);
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}
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i--;
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}
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// point i at the location of the comma minus one (or -1).
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i -= matchlen;
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}
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return mask;
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}
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/**
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* Return the canonical string representation of the actions.
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* Always returns present actions in the following order:
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* read, write.
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*
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* @return the canonical string representation of the actions.
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*/
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static String getActions(int mask)
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{
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StringBuilder sb = new StringBuilder();
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boolean comma = false;
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if ((mask & READ) == READ) {
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comma = true;
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sb.append("read");
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}
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if ((mask & WRITE) == WRITE) {
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if (comma) sb.append(',');
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else comma = true;
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sb.append("write");
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}
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return sb.toString();
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}
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/**
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* Returns the "canonical string representation" of the actions.
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* That is, this method always returns present actions in the following order:
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* read, write. For example, if this PropertyPermission object
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* allows both write and read actions, a call to <code>getActions</code>
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* will return the string "read,write".
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*
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* @return the canonical string representation of the actions.
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*/
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public String getActions()
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{
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if (actions == null)
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actions = getActions(this.mask);
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return actions;
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}
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/**
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* Return the current action mask.
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* Used by the PropertyPermissionCollection
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*
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* @return the actions mask.
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*/
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int getMask() {
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return mask;
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}
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/**
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* Returns a new PermissionCollection object for storing
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* PropertyPermission objects.
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* <p>
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*
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* @return a new PermissionCollection object suitable for storing
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* PropertyPermissions.
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*/
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public PermissionCollection newPermissionCollection() {
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return new PropertyPermissionCollection();
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}
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|
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|
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private static final long serialVersionUID = 885438825399942851L;
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|
395 |
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|
396 |
/**
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|
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* WriteObject is called to save the state of the PropertyPermission
|
|
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* to a stream. The actions are serialized, and the superclass
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|
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* takes care of the name.
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*/
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|
401 |
private synchronized void writeObject(java.io.ObjectOutputStream s)
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|
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throws IOException
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|
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{
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|
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// Write out the actions. The superclass takes care of the name
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|
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// call getActions to make sure actions field is initialized
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|
406 |
if (actions == null)
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|
407 |
getActions();
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|
408 |
s.defaultWriteObject();
|
|
409 |
}
|
|
410 |
|
|
411 |
/**
|
|
412 |
* readObject is called to restore the state of the PropertyPermission from
|
|
413 |
* a stream.
|
|
414 |
*/
|
|
415 |
private synchronized void readObject(java.io.ObjectInputStream s)
|
|
416 |
throws IOException, ClassNotFoundException
|
|
417 |
{
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|
418 |
// Read in the action, then initialize the rest
|
|
419 |
s.defaultReadObject();
|
|
420 |
init(getMask(actions));
|
|
421 |
}
|
|
422 |
}
|
|
423 |
|
|
424 |
/**
|
|
425 |
* A PropertyPermissionCollection stores a set of PropertyPermission
|
|
426 |
* permissions.
|
|
427 |
*
|
|
428 |
* @see java.security.Permission
|
|
429 |
* @see java.security.Permissions
|
|
430 |
* @see java.security.PermissionCollection
|
|
431 |
*
|
|
432 |
*
|
|
433 |
* @author Roland Schemers
|
|
434 |
*
|
|
435 |
* @serial include
|
|
436 |
*/
|
|
437 |
final class PropertyPermissionCollection extends PermissionCollection
|
|
438 |
implements Serializable
|
|
439 |
{
|
|
440 |
|
|
441 |
/**
|
|
442 |
* Key is property name; value is PropertyPermission.
|
|
443 |
* Not serialized; see serialization section at end of class.
|
|
444 |
*/
|
|
445 |
private transient Map perms;
|
|
446 |
|
|
447 |
/**
|
|
448 |
* Boolean saying if "*" is in the collection.
|
|
449 |
*
|
|
450 |
* @see #serialPersistentFields
|
|
451 |
*/
|
|
452 |
// No sync access; OK for this to be stale.
|
|
453 |
private boolean all_allowed;
|
|
454 |
|
|
455 |
/**
|
|
456 |
* Create an empty PropertyPermissions object.
|
|
457 |
*
|
|
458 |
*/
|
|
459 |
|
|
460 |
public PropertyPermissionCollection() {
|
|
461 |
perms = new HashMap(32); // Capacity for default policy
|
|
462 |
all_allowed = false;
|
|
463 |
}
|
|
464 |
|
|
465 |
/**
|
|
466 |
* Adds a permission to the PropertyPermissions. The key for the hash is
|
|
467 |
* the name.
|
|
468 |
*
|
|
469 |
* @param permission the Permission object to add.
|
|
470 |
*
|
|
471 |
* @exception IllegalArgumentException - if the permission is not a
|
|
472 |
* PropertyPermission
|
|
473 |
*
|
|
474 |
* @exception SecurityException - if this PropertyPermissionCollection
|
|
475 |
* object has been marked readonly
|
|
476 |
*/
|
|
477 |
|
|
478 |
public void add(Permission permission)
|
|
479 |
{
|
|
480 |
if (! (permission instanceof PropertyPermission))
|
|
481 |
throw new IllegalArgumentException("invalid permission: "+
|
|
482 |
permission);
|
|
483 |
if (isReadOnly())
|
|
484 |
throw new SecurityException(
|
|
485 |
"attempt to add a Permission to a readonly PermissionCollection");
|
|
486 |
|
|
487 |
PropertyPermission pp = (PropertyPermission) permission;
|
|
488 |
String propName = pp.getName();
|
|
489 |
|
|
490 |
synchronized (this) {
|
|
491 |
PropertyPermission existing = (PropertyPermission) perms.get(propName);
|
|
492 |
|
|
493 |
if (existing != null) {
|
|
494 |
int oldMask = existing.getMask();
|
|
495 |
int newMask = pp.getMask();
|
|
496 |
if (oldMask != newMask) {
|
|
497 |
int effective = oldMask | newMask;
|
|
498 |
String actions = PropertyPermission.getActions(effective);
|
|
499 |
perms.put(propName, new PropertyPermission(propName, actions));
|
|
500 |
}
|
|
501 |
} else {
|
|
502 |
perms.put(propName, permission);
|
|
503 |
}
|
|
504 |
}
|
|
505 |
|
|
506 |
if (!all_allowed) {
|
|
507 |
if (propName.equals("*"))
|
|
508 |
all_allowed = true;
|
|
509 |
}
|
|
510 |
}
|
|
511 |
|
|
512 |
/**
|
|
513 |
* Check and see if this set of permissions implies the permissions
|
|
514 |
* expressed in "permission".
|
|
515 |
*
|
|
516 |
* @param p the Permission object to compare
|
|
517 |
*
|
|
518 |
* @return true if "permission" is a proper subset of a permission in
|
|
519 |
* the set, false if not.
|
|
520 |
*/
|
|
521 |
|
|
522 |
public boolean implies(Permission permission)
|
|
523 |
{
|
|
524 |
if (! (permission instanceof PropertyPermission))
|
|
525 |
return false;
|
|
526 |
|
|
527 |
PropertyPermission pp = (PropertyPermission) permission;
|
|
528 |
PropertyPermission x;
|
|
529 |
|
|
530 |
int desired = pp.getMask();
|
|
531 |
int effective = 0;
|
|
532 |
|
|
533 |
// short circuit if the "*" Permission was added
|
|
534 |
if (all_allowed) {
|
|
535 |
synchronized (this) {
|
|
536 |
x = (PropertyPermission) perms.get("*");
|
|
537 |
}
|
|
538 |
if (x != null) {
|
|
539 |
effective |= x.getMask();
|
|
540 |
if ((effective & desired) == desired)
|
|
541 |
return true;
|
|
542 |
}
|
|
543 |
}
|
|
544 |
|
|
545 |
// strategy:
|
|
546 |
// Check for full match first. Then work our way up the
|
|
547 |
// name looking for matches on a.b.*
|
|
548 |
|
|
549 |
String name = pp.getName();
|
|
550 |
//System.out.println("check "+name);
|
|
551 |
|
|
552 |
synchronized (this) {
|
|
553 |
x = (PropertyPermission) perms.get(name);
|
|
554 |
}
|
|
555 |
|
|
556 |
if (x != null) {
|
|
557 |
// we have a direct hit!
|
|
558 |
effective |= x.getMask();
|
|
559 |
if ((effective & desired) == desired)
|
|
560 |
return true;
|
|
561 |
}
|
|
562 |
|
|
563 |
// work our way up the tree...
|
|
564 |
int last, offset;
|
|
565 |
|
|
566 |
offset = name.length()-1;
|
|
567 |
|
|
568 |
while ((last = name.lastIndexOf(".", offset)) != -1) {
|
|
569 |
|
|
570 |
name = name.substring(0, last+1) + "*";
|
|
571 |
//System.out.println("check "+name);
|
|
572 |
synchronized (this) {
|
|
573 |
x = (PropertyPermission) perms.get(name);
|
|
574 |
}
|
|
575 |
|
|
576 |
if (x != null) {
|
|
577 |
effective |= x.getMask();
|
|
578 |
if ((effective & desired) == desired)
|
|
579 |
return true;
|
|
580 |
}
|
|
581 |
offset = last -1;
|
|
582 |
}
|
|
583 |
|
|
584 |
// we don't have to check for "*" as it was already checked
|
|
585 |
// at the top (all_allowed), so we just return false
|
|
586 |
return false;
|
|
587 |
}
|
|
588 |
|
|
589 |
/**
|
|
590 |
* Returns an enumeration of all the PropertyPermission objects in the
|
|
591 |
* container.
|
|
592 |
*
|
|
593 |
* @return an enumeration of all the PropertyPermission objects.
|
|
594 |
*/
|
|
595 |
|
|
596 |
public Enumeration elements() {
|
|
597 |
// Convert Iterator of Map values into an Enumeration
|
|
598 |
synchronized (this) {
|
|
599 |
return Collections.enumeration(perms.values());
|
|
600 |
}
|
|
601 |
}
|
|
602 |
|
|
603 |
private static final long serialVersionUID = 7015263904581634791L;
|
|
604 |
|
|
605 |
// Need to maintain serialization interoperability with earlier releases,
|
|
606 |
// which had the serializable field:
|
|
607 |
//
|
|
608 |
// Table of permissions.
|
|
609 |
//
|
|
610 |
// @serial
|
|
611 |
//
|
|
612 |
// private Hashtable permissions;
|
|
613 |
/**
|
|
614 |
* @serialField permissions java.util.Hashtable
|
|
615 |
* A table of the PropertyPermissions.
|
|
616 |
* @serialField all_allowed boolean
|
|
617 |
* boolean saying if "*" is in the collection.
|
|
618 |
*/
|
|
619 |
private static final ObjectStreamField[] serialPersistentFields = {
|
|
620 |
new ObjectStreamField("permissions", Hashtable.class),
|
|
621 |
new ObjectStreamField("all_allowed", Boolean.TYPE),
|
|
622 |
};
|
|
623 |
|
|
624 |
/**
|
|
625 |
* @serialData Default fields.
|
|
626 |
*/
|
|
627 |
/*
|
|
628 |
* Writes the contents of the perms field out as a Hashtable for
|
|
629 |
* serialization compatibility with earlier releases. all_allowed
|
|
630 |
* unchanged.
|
|
631 |
*/
|
|
632 |
private void writeObject(ObjectOutputStream out) throws IOException {
|
|
633 |
// Don't call out.defaultWriteObject()
|
|
634 |
|
|
635 |
// Copy perms into a Hashtable
|
|
636 |
Hashtable permissions = new Hashtable(perms.size()*2);
|
|
637 |
synchronized (this) {
|
|
638 |
permissions.putAll(perms);
|
|
639 |
}
|
|
640 |
|
|
641 |
// Write out serializable fields
|
|
642 |
ObjectOutputStream.PutField pfields = out.putFields();
|
|
643 |
pfields.put("all_allowed", all_allowed);
|
|
644 |
pfields.put("permissions", permissions);
|
|
645 |
out.writeFields();
|
|
646 |
}
|
|
647 |
|
|
648 |
/*
|
|
649 |
* Reads in a Hashtable of PropertyPermissions and saves them in the
|
|
650 |
* perms field. Reads in all_allowed.
|
|
651 |
*/
|
|
652 |
private void readObject(ObjectInputStream in) throws IOException,
|
|
653 |
ClassNotFoundException {
|
|
654 |
// Don't call defaultReadObject()
|
|
655 |
|
|
656 |
// Read in serialized fields
|
|
657 |
ObjectInputStream.GetField gfields = in.readFields();
|
|
658 |
|
|
659 |
// Get all_allowed
|
|
660 |
all_allowed = gfields.get("all_allowed", false);
|
|
661 |
|
|
662 |
// Get permissions
|
|
663 |
Hashtable permissions = (Hashtable)gfields.get("permissions", null);
|
|
664 |
perms = new HashMap(permissions.size()*2);
|
|
665 |
perms.putAll(permissions);
|
|
666 |
}
|
|
667 |
}
|