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/* DelegationPermission.java -- kerberos delegation permission
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.security.auth.kerberos;
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import java.security.BasicPermission;
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import java.security.Permission;
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import java.security.PermissionCollection;
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import java.util.Enumeration;
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import java.util.Vector;
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public final class DelegationPermission
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extends BasicPermission
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// FIXME: Enable this when serialization works.
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// private static final long serialVersionUID = 883133252142523922L;
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* Create a new instance with the given name.
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public DelegationPermission(String name)
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* Create a new instance with the given name and actions.
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* The name consists of two parts: first the subordinate
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* service principal, then the target service principal.
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* Each principal is surrounded by quotes; the two are separated
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* @param name the name
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* @param actions the actions; this is ignored
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public DelegationPermission(String name, String actions)
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private static void checkSyntax(String name)
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int index = name.indexOf('"', 1);
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int len = name.length();
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if (name.charAt(0) != '"' || name.charAt(len - 1) != '"'
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|| index == -1 || index + 3 >= len
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|| name.charAt(index + 1) != ' '
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|| name.charAt(index + 2) != '"')
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// FIXME: better message here.
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throw new IllegalArgumentException("invalid syntax for principals");
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public boolean implies(Permission perm)
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public PermissionCollection newPermissionCollection()
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// FIXME: don't know how to serialize here. I suspect this
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// class has to have a particular name, etc ...
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return new PermissionCollection()
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private Vector permissions = new Vector();
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public void add(Permission perm)
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throw new SecurityException("readonly");
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if (! (perm instanceof DelegationPermission))
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throw new IllegalArgumentException("can only add DelegationPermissions");
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permissions.add(perm);
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public boolean implies(Permission perm)
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if (! (perm instanceof DelegationPermission))
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Enumeration e = elements();
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while (e.hasMoreElements())
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DelegationPermission dp = (DelegationPermission) e.nextElement();
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if (dp.implies(perm))
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public Enumeration elements()
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return permissions.elements();