/* * Copyright (c) 2000, 2013, 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 javax.security.auth.kerberos; import java.util.*; import java.security.Permission; import java.security.BasicPermission; import java.security.PermissionCollection; import java.io.ObjectStreamField; import java.io.ObjectOutputStream; import java.io.ObjectInputStream; import java.io.IOException; /** * This class is used to restrict the usage of the Kerberos * delegation model, ie: forwardable and proxiable tickets. *
* The target name of this {@code Permission} specifies a pair of * kerberos service principals. The first is the subordinate service principal * being entrusted to use the TGT. The second service principal designates * the target service the subordinate service principal is to * interact with on behalf of the initiating KerberosPrincipal. This * latter service principal is specified to restrict the use of a * proxiable ticket. *
* For example, to specify the "host" service use of a forwardable TGT the * target permission is specified as follows: * *
* DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"krbtgt/EXAMPLE.COM@EXAMPLE.COM\""); **
* To give the "backup" service a proxiable nfs service ticket the target permission * might be specified: * *
* DelegationPermission("\"backup/bar.example.com@EXAMPLE.COM\" \"nfs/home.EXAMPLE.COM@EXAMPLE.COM\""); ** * @since 1.4 */ public final class DelegationPermission extends BasicPermission implements java.io.Serializable { private static final long serialVersionUID = 883133252142523922L; private transient String subordinate, service; /** * Create a new {@code DelegationPermission} * with the specified subordinate and target principals. * *
* * @param principals the name of the subordinate and target principals * * @throws NullPointerException if {@code principals} is {@code null}. * @throws IllegalArgumentException if {@code principals} is empty. */ public DelegationPermission(String principals) { super(principals); init(principals); } /** * Create a new {@code DelegationPermission} * with the specified subordinate and target principals. *
* * @param principals the name of the subordinate and target principals *
* @param actions should be null. * * @throws NullPointerException if {@code principals} is {@code null}. * @throws IllegalArgumentException if {@code principals} is empty. */ public DelegationPermission(String principals, String actions) { super(principals, actions); init(principals); } /** * Initialize the DelegationPermission object. */ private void init(String target) { StringTokenizer t = null; if (!target.startsWith("\"")) { throw new IllegalArgumentException ("service principal [" + target + "] syntax invalid: " + "improperly quoted"); } else { t = new StringTokenizer(target, "\"", false); subordinate = t.nextToken(); if (t.countTokens() == 2) { t.nextToken(); // bypass whitespace service = t.nextToken(); } else if (t.countTokens() > 0) { throw new IllegalArgumentException ("service principal [" + t.nextToken() + "] syntax invalid: " + "improperly quoted"); } } } /** * Checks if this Kerberos delegation permission object "implies" the * specified permission. *
* If none of the above are true, {@code implies} returns false. * @param p the permission to check against. * * @return true if the specified permission is implied by this object, * false if not. */ public boolean implies(Permission p) { if (!(p instanceof DelegationPermission)) return false; DelegationPermission that = (DelegationPermission) p; if (this.subordinate.equals(that.subordinate) && this.service.equals(that.service)) return true; return false; } /** * Checks two DelegationPermission objects for equality. *
* @param obj the object to test for equality with this object.
*
* @return true if obj is a DelegationPermission, and
* has the same subordinate and service principal as this.
* DelegationPermission object.
*/
public boolean equals(Object obj) {
if (obj == this)
return true;
if (! (obj instanceof DelegationPermission))
return false;
DelegationPermission that = (DelegationPermission) obj;
return implies(that);
}
/**
* Returns the hash code value for this object.
*
* @return a hash code value for this object.
*/
public int hashCode() {
return getName().hashCode();
}
/**
* Returns a PermissionCollection object for storing
* DelegationPermission objects.
*
* DelegationPermission objects must be stored in a manner that
* allows them to be inserted into the collection in any order, but
* that also enables the PermissionCollection implies method to
* be implemented in an efficient (and consistent) manner.
*
* @return a new PermissionCollection object suitable for storing
* DelegationPermissions.
*/
public PermissionCollection newPermissionCollection() {
return new KrbDelegationPermissionCollection();
}
/**
* WriteObject is called to save the state of the DelegationPermission
* to a stream. The actions are serialized, and the superclass
* takes care of the name.
*/
private synchronized void writeObject(java.io.ObjectOutputStream s)
throws IOException
{
s.defaultWriteObject();
}
/**
* readObject is called to restore the state of the
* DelegationPermission from a stream.
*/
private synchronized void readObject(java.io.ObjectInputStream s)
throws IOException, ClassNotFoundException
{
// Read in the action, then initialize the rest
s.defaultReadObject();
init(getName());
}
/*
public static void main(String args[]) throws Exception {
DelegationPermission this_ =
new DelegationPermission(args[0]);
DelegationPermission that_ =
new DelegationPermission(args[1]);
System.out.println("-----\n");
System.out.println("this.implies(that) = " + this_.implies(that_));
System.out.println("-----\n");
System.out.println("this = "+this_);
System.out.println("-----\n");
System.out.println("that = "+that_);
System.out.println("-----\n");
KrbDelegationPermissionCollection nps =
new KrbDelegationPermissionCollection();
nps.add(this_);
nps.add(new DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\""));
try {
nps.add(new DelegationPermission("host/foo.example.com@EXAMPLE.COM \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\""));
} catch (Exception e) {
System.err.println(e);
}
System.out.println("nps.implies(that) = " + nps.implies(that_));
System.out.println("-----\n");
Enumeration e = nps.elements();
while (e.hasMoreElements()) {
DelegationPermission x =
(DelegationPermission) e.nextElement();
System.out.println("nps.e = " + x);
}
}
*/
}
final class KrbDelegationPermissionCollection extends PermissionCollection
implements java.io.Serializable {
// Not serialized; see serialization section at end of class.
private transient List