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diff --git a/libjava/classpath/javax/security/auth/kerberos/ServicePermission.java b/libjava/classpath/javax/security/auth/kerberos/ServicePermission.java
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+++ b/libjava/classpath/javax/security/auth/kerberos/ServicePermission.java
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+/* ServicePermission.java -- kerberos service permission
+   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.security.auth.kerberos;
+
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.util.Enumeration;
+import java.util.StringTokenizer;
+import java.util.Vector;
+
+/**
+ * This represents permission to access to a Kerberos service principal.
+ * See the Kerberos authentication RFC for more information:
+ * <a href="http://www.ietf.org/rfc/rfc1510.txt">RFC 1510</a>.
+ *
+ * @since 1.4
+ */
+public final class ServicePermission
+    extends Permission
+{
+  // FIXME: Enable this when serialization works.
+  // private static final long serialVersionUID = -1227585031618624935L;
+
+  private static final int INITIATE = 1;
+  private static final int ACCEPT = 2;
+
+  private int flags;
+
+  /**
+   * Create a new service permission with the indicated name and actions.
+   *
+   * The name is the name of the kerberos principal for the service.
+   *
+   * The actions are a comma-separated list of strings.  The recognized
+   * actions are "initiate" and "accept".  The "initiate" action means
+   * that the holder of the permission can access the service.  The
+   * "accept" action means that the holder of the permission can operate
+   * as this service.
+   *
+   * @param name the prinicpal's name
+   * @param action the allowed actions
+   */
+  public ServicePermission(String name, String action)
+  {
+    super(name);
+    parseActions(action);
+  }
+
+  public boolean implies(Permission perm)
+  {
+    if (! (perm instanceof ServicePermission))
+      return false;
+    ServicePermission sp = (ServicePermission) perm;
+    if ((flags & sp.flags) != sp.flags)
+      return false;
+    return getName().equals(sp.getName());
+  }
+
+  public boolean equals(Object obj)
+  {
+    if (! (obj instanceof ServicePermission))
+      return false;
+    ServicePermission sp = (ServicePermission) obj;
+    return flags == sp.flags && getName().equals(sp.getName());
+  }
+
+  public int hashCode()
+  {
+    return getName().hashCode() + flags;
+  }
+
+  /**
+   * Return a string representing the actions.
+   */
+  public String getActions()
+  {
+    if (flags == (INITIATE | ACCEPT))
+      return "initiate,accept";
+    if (flags == INITIATE)
+      return "initiate";
+    if (flags == ACCEPT)
+      return "accept";
+    return "";
+  }
+
+  public PermissionCollection newPermissionCollection()
+  {
+    return new PermissionCollection()
+    {
+      private Vector permissions = new Vector();
+
+      public void add(Permission perm)
+      {
+        if (isReadOnly())
+          throw new SecurityException("readonly");
+        if (! (perm instanceof ServicePermission))
+          throw new IllegalArgumentException("can only add DelegationPermissions");
+        permissions.add(perm);
+      }
+
+      public boolean implies(Permission perm)
+      {
+        if (! (perm instanceof ServicePermission))
+          return false;
+        Enumeration e = elements();
+        while (e.hasMoreElements())
+          {
+            ServicePermission sp = (ServicePermission) e.nextElement();
+            if (sp.implies(perm))
+              return true;
+          }
+        return false;
+      }
+
+      public Enumeration elements()
+      {
+        return permissions.elements();
+      }
+    };
+  }
+
+  private void parseActions(String actions)
+  {
+    StringTokenizer tok = new StringTokenizer(actions, ",");
+    while (tok.hasMoreTokens())
+      {
+        String token = tok.nextToken();
+        if ("accept".equals(token))
+          flags |= ACCEPT;
+        else if ("initiate".equals(token))
+          flags |= INITIATE;
+        else
+          throw new IllegalArgumentException("unrecognized token: " + token);
+      }
+  }
+}