mirror of git://gcc.gnu.org/git/gcc.git
471 lines
16 KiB
Java
471 lines
16 KiB
Java
/* MBeanServerPermission.java -- Permissions controlling server creation.
|
|
Copyright (C) 2006 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package javax.management;
|
|
|
|
import java.security.BasicPermission;
|
|
import java.security.Permission;
|
|
import java.security.PermissionCollection;
|
|
|
|
import java.util.Enumeration;
|
|
import java.util.NoSuchElementException;
|
|
|
|
/**
|
|
* <p>
|
|
* Represents the permissions required to perform
|
|
* operations provided by the {@link MBeanServerFactory}.
|
|
* As with all {@link java.security.Permission} objects, an
|
|
* instance of this class either represents a permission
|
|
* already held or one that is required to access a
|
|
* particular service. In the case of {@link MBeanServerPermission}s,
|
|
* implication checks are made using an instance of this class
|
|
* when a user requests an operation from the factory, and a
|
|
* {@link SecurityManager} is in place.
|
|
* </p>
|
|
* <p>
|
|
* The permission is defined by its name, which may be
|
|
* either a <code>'*'</code> (to allow all) or one or
|
|
* more of the following, separated by a <code>','</code>:
|
|
* </p>
|
|
* <ul>
|
|
* <li><code>createMBeanServer</code> -- allows a registered
|
|
* instance of a server to be obtained from the factory.</li>
|
|
* <li><code>findMBeanServer</code> -- allows all or one
|
|
* particular server instance to be retrieved from the factory.</li>
|
|
* <li><code>newMBeanServer</code> -- allows an unregistered
|
|
* instance of a server to be obtained from the factory.</li>
|
|
* <li><code>releaseMBeanServer</code> -- allows a reference to
|
|
* a server instance to be removed from the factory.</li>
|
|
* </ul>
|
|
* <p>
|
|
* The names may be surrounded by arbitrary amounts of whitespace.
|
|
* <code>createMBeanServer</code> implies <code>newMBeanServer</code>.
|
|
* </p>
|
|
*
|
|
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
|
|
* @since 1.5
|
|
*/
|
|
public class MBeanServerPermission
|
|
extends BasicPermission
|
|
{
|
|
|
|
/**
|
|
* Compatible with JDK 1.5
|
|
*/
|
|
private static final long serialVersionUID = -5661980843569388590L;
|
|
|
|
/**
|
|
* <p>
|
|
* Constructs a new {@link MBeanServerPermission} with
|
|
* the given name. The name must not be <code>null</code>
|
|
* and must be equal to either <code>"*"</code> or a
|
|
* comma-separated list of valid permissions. The four
|
|
* valid constraints are:
|
|
* </p>
|
|
* <ol>
|
|
* <li><code>createMBeanServer</code></li>
|
|
* <li><code>findMBeanServer</code></li>
|
|
* <li><code>newMBeanServer</code></li>
|
|
* <li><code>releaseMBeanServer</code></li>
|
|
* </ol>
|
|
* <p>
|
|
* Calling this constructor is equivalent to calling
|
|
* <code>MBeanPermission(name, null)</code>.
|
|
* </p>
|
|
*
|
|
* @param name the name of this permission.
|
|
* @throws NullPointerException if <code>name</code>
|
|
* is <code>null</code>.
|
|
* @throws IllegalArgumentException if <code>name</code>
|
|
* is not either equal to
|
|
* <code>"*"</code> or forms
|
|
* a comma-separated list of
|
|
* valid constraints.
|
|
* @see #MBeanServerPermission(String,String)
|
|
*/
|
|
public MBeanServerPermission(String name)
|
|
{
|
|
this(name, null);
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Constructs a new {@link MBeanServerPermission} with
|
|
* the given name and actions. The actions are unused,
|
|
* and must be either <code>null</code> or the empty
|
|
* string. The name must not be <code>null</code>
|
|
* and must be equal to either <code>"*"</code> or a
|
|
* comma-separated list of valid permissions. The four
|
|
* valid constraints are:
|
|
* </p>
|
|
* <ol>
|
|
* <li><code>createMBeanServer</code></li>
|
|
* <li><code>findMBeanServer</code></li>
|
|
* <li><code>newMBeanServer</code></li>
|
|
* <li><code>releaseMBeanServer</code></li>
|
|
* </ol>
|
|
* <p>
|
|
* Calling this constructor is equivalent to calling
|
|
* <code>MBeanPermission(name, null)</code>.
|
|
* </p>
|
|
*
|
|
* @param name the name of this permission.
|
|
* @throws NullPointerException if <code>name</code>
|
|
* is <code>null</code>.
|
|
* @throws IllegalArgumentException if <code>name</code>
|
|
* is not either equal to
|
|
* <code>"*"</code> or forms
|
|
* a comma-separated list of
|
|
* valid constraints, or if
|
|
* <code>actions</code> is not
|
|
* <code>null</code> or the
|
|
* empty string.
|
|
* @see #MBeanServerPermission(String,String)
|
|
*/
|
|
public MBeanServerPermission(String name, String actions)
|
|
{
|
|
super(checkName(name), actions);
|
|
if (actions != null && actions.length() > 0)
|
|
throw new IllegalArgumentException("The supplied action list " +
|
|
"was not equal to null or the " +
|
|
"empty string.");
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given object is also an {@link MBeanServerPermission}
|
|
* with the same name.
|
|
*
|
|
* @param obj the object to compare with this one.
|
|
* @return true if the object is an {@link MBeanPermission}
|
|
* with the same name.
|
|
*/
|
|
public boolean equals(Object obj)
|
|
{
|
|
if (obj instanceof MBeanServerPermission)
|
|
{
|
|
MBeanServerPermission o = (MBeanServerPermission) obj;
|
|
return o.getName().equals(getName());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns a unique hash code for this permission.
|
|
* This is simply the hashcode of {@link BasicPermission#getName()}.
|
|
*
|
|
* @return the hashcode of this permission.
|
|
*/
|
|
public int hashCode()
|
|
{
|
|
return getName().hashCode();
|
|
}
|
|
|
|
/**
|
|
* Returns true if this {@link MBeanServerPermission} implies
|
|
* the given permission. This occurs if the given permission
|
|
* is also an {@link MBeanServerPermission} and its target names
|
|
* are a subset of the target names of this permission. Note that
|
|
* the name <code>createMBeanServer</code> implies
|
|
* <code>newMBeanServer</code>.
|
|
*
|
|
* @param p the permission to check for implication.
|
|
* @return true if this permission implies <code>p</code>.
|
|
*/
|
|
public boolean implies(Permission p)
|
|
{
|
|
if (p instanceof MBeanServerPermission)
|
|
{
|
|
if (getName().equals("*"))
|
|
return true;
|
|
MBeanServerPermission msp = (MBeanServerPermission) p;
|
|
String[] thisCaps = getName().split(",");
|
|
String[] mspCaps = msp.getName().split(",");
|
|
for (int a = 0; a < mspCaps.length; ++a)
|
|
{
|
|
boolean found = false;
|
|
String mc = mspCaps[a].trim();
|
|
for (int b = 0; b < thisCaps.length; ++b)
|
|
{
|
|
String tc = thisCaps[b].trim();
|
|
if (tc.equals(mc))
|
|
found = true;
|
|
if (tc.equals("createMBeanServer") &&
|
|
mc.equals("newMBeanServer"))
|
|
found = true;
|
|
}
|
|
if (!found)
|
|
return false;
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns a {@link PermissionCollection} which stores
|
|
* a series of {@link MBeanServerPermission}s as the union
|
|
* of their capabilities.
|
|
*
|
|
* @return a collection for {@link MBeanServerPermission}s.
|
|
*/
|
|
public PermissionCollection newPermissionCollection()
|
|
{
|
|
return new MBeanServerPermissionCollection();
|
|
}
|
|
|
|
/**
|
|
* A collection of {@link MBeanServerPermission}s, stored
|
|
* as a single permission with the union of the capabilities
|
|
* as its capabilities.
|
|
*
|
|
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
|
|
* @since 1.5
|
|
*/
|
|
private class MBeanServerPermissionCollection
|
|
extends PermissionCollection
|
|
{
|
|
|
|
/**
|
|
* Compatible with JDK 1.5
|
|
*/
|
|
private static final long serialVersionUID = -5661980843569388590L;
|
|
|
|
/**
|
|
* The collected permission. This is <code>null</code> or
|
|
* the union of the permissions held by all the collected
|
|
* permissions.
|
|
*/
|
|
private MBeanServerPermission collectionPermission;
|
|
|
|
/**
|
|
* Adds a new permission by unifying it with the existing
|
|
* collection permission.
|
|
*
|
|
* @param p the permission to add.
|
|
* @throws SecurityException if the collection is read only.
|
|
* @see #isReadOnly()
|
|
* @see #setReadOnly(boolean)
|
|
*/
|
|
@Override
|
|
public void add(Permission p)
|
|
{
|
|
if (isReadOnly())
|
|
throw new SecurityException("This collection is read only.");
|
|
if (p instanceof MBeanServerPermission)
|
|
{
|
|
MBeanServerPermission msp = (MBeanServerPermission) p;
|
|
if (collectionPermission == null)
|
|
collectionPermission = msp;
|
|
else
|
|
{
|
|
String finalString = collectionPermission.getName();
|
|
String[] cp = finalString.split(",");
|
|
String[] np = msp.getName().split(",");
|
|
int createms = finalString.indexOf("createMBeanServer");
|
|
int newms = finalString.indexOf("newMBeanServer");
|
|
for (int a = 0; a < np.length; ++a)
|
|
{
|
|
boolean found = false;
|
|
String nps = np[a].trim();
|
|
for (int b = 0; b < cp.length; ++b)
|
|
{
|
|
String cps = cp[b].trim();
|
|
if (cps.equals(nps))
|
|
found = true;
|
|
if (nps.equals("newMBeanServer")
|
|
&& createms != -1)
|
|
found = true;
|
|
if (nps.equals("createMBeanServer")
|
|
&& newms != -1)
|
|
finalString =
|
|
finalString.replace("newMBeanServer",
|
|
"createMBeanServer");
|
|
}
|
|
if (!found)
|
|
finalString += "," + nps;
|
|
}
|
|
collectionPermission =
|
|
new MBeanServerPermission(finalString);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an enumeration over the single permission.
|
|
*
|
|
* @return an enumeration over the collection permission.
|
|
*/
|
|
@Override
|
|
public Enumeration<Permission> elements()
|
|
{
|
|
return new
|
|
MBeanServerPermissionEnumeration(collectionPermission);
|
|
}
|
|
|
|
/**
|
|
* Provides an enumeration over a comma-separated list
|
|
* of capabilities.
|
|
*
|
|
* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
|
|
* @since 1.5
|
|
*/
|
|
private class MBeanServerPermissionEnumeration
|
|
implements Enumeration<Permission>
|
|
{
|
|
|
|
/**
|
|
* The collected permission.
|
|
*/
|
|
private MBeanServerPermission p;
|
|
|
|
/**
|
|
* True if we have returned the permission.
|
|
*/
|
|
private boolean done;
|
|
|
|
/**
|
|
* Constructs a new {@link MBeanServerPermissionEnumeration}
|
|
* using the given collected permission.
|
|
*
|
|
* @param p the collected permission.
|
|
*/
|
|
public MBeanServerPermissionEnumeration(MBeanServerPermission p)
|
|
{
|
|
this.p = p;
|
|
done = false;
|
|
}
|
|
|
|
/**
|
|
* Returns true if there are more capabilities to return.
|
|
*
|
|
* @return true if there are more capabilities available.
|
|
*/
|
|
public boolean hasMoreElements()
|
|
{
|
|
return !done;
|
|
}
|
|
|
|
/**
|
|
* Returns the next capability.
|
|
*
|
|
* @return the next capability.
|
|
*/
|
|
public Permission nextElement()
|
|
{
|
|
if (hasMoreElements())
|
|
{
|
|
done = true;
|
|
return p;
|
|
}
|
|
else
|
|
throw new NoSuchElementException("No more elements are available.");
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Returns true if the collected {@link MBeanServerPermission}
|
|
* implies the given permission. This occurs if the given permission
|
|
* is also an {@link MBeanServerPermission} and its target names
|
|
* are a subset of the target names of this permission. Note that
|
|
* the name <code>createMBeanServer</code> implies
|
|
* <code>newMBeanServer</code>.
|
|
*
|
|
* @param p the permission to check for implication.
|
|
* @return true if this permission implies <code>p</code>.
|
|
*/
|
|
@Override
|
|
public boolean implies(Permission p)
|
|
{
|
|
return collectionPermission.implies(p);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Checks the name is valid, including removing
|
|
* the <code>newMBeanServer</code> permission when
|
|
* <code>createMBeanServer</code> is present.
|
|
*
|
|
* @param name the name to check.
|
|
* @throws NullPointerException if <code>name</code>
|
|
* is <code>null</code>.
|
|
* @throws IllegalArgumentException if <code>name</code>
|
|
* is not either equal to
|
|
* <code>"*"</code> or forms
|
|
* a comma-separated list of
|
|
* valid constraints.
|
|
*/
|
|
private static String checkName(String name)
|
|
{
|
|
if (!(name.equals("*")))
|
|
{
|
|
String[] constraints = name.split(",");
|
|
name = "";
|
|
boolean seenCreate = false;
|
|
boolean seenNew = false;
|
|
boolean start = true;
|
|
for (int a = 0; a < constraints.length; ++a)
|
|
{
|
|
String next = constraints[a].trim();
|
|
if (!(next.equals("createMBeanServer") ||
|
|
next.equals("findMBeanServer") ||
|
|
next.equals("newMBeanServer") ||
|
|
next.equals("releaseMBeanServer")))
|
|
throw new IllegalArgumentException("An invalid constraint, " +
|
|
next + ", was specified.");
|
|
if (next.equals("newMBeanServer"))
|
|
seenNew = true;
|
|
else if (next.equals("createMBeanServer"))
|
|
seenCreate = true;
|
|
else
|
|
{
|
|
if (!start)
|
|
name += ",";
|
|
name += next;
|
|
start = false;
|
|
}
|
|
}
|
|
if (seenNew && !seenCreate)
|
|
name += (start ? "" : ",") + "newMBeanServer";
|
|
else if (seenCreate)
|
|
name += (start ? "" : ",") + "createMBeanServer";
|
|
}
|
|
return name;
|
|
}
|
|
|
|
}
|