| /* |
| * Copyright (c) 2000, 2006, 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. |
| * <p> |
| * The target name of this <code>Permission</code> 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. |
| * <p> |
| * For example, to specify the "host" service use of a forwardable TGT the |
| * target permission is specified as follows: |
| * <p> |
| * <pre> |
| * DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"krbtgt/EXAMPLE.COM@EXAMPLE.COM\""); |
| * </pre> |
| * <p> |
| * To give the "backup" service a proxiable nfs service ticket the target permission |
| * might be specified: |
| * <p> |
| * <pre> |
| * DelegationPermission("\"backup/bar.example.com@EXAMPLE.COM\" \"nfs/home.EXAMPLE.COM@EXAMPLE.COM\""); |
| * </pre> |
| * |
| * @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</code> |
| * with the specified subordinate and target principals. |
| * |
| * <p> |
| * |
| * @param principals the name of the subordinate and target principals |
| * |
| * @throws NullPointerException if <code>principals</code> is <code>null</code>. |
| * @throws IllegalArgumentException if <code>principals</code> is empty. |
| */ |
| public DelegationPermission(String principals) { |
| super(principals); |
| init(principals); |
| } |
| |
| /** |
| * Create a new <code>DelegationPermission</code> |
| * with the specified subordinate and target principals. |
| * <p> |
| * |
| * @param principals the name of the subordinate and target principals |
| * <p> |
| * @param actions should be null. |
| * |
| * @throws NullPointerException if <code>principals</code> is <code>null</code>. |
| * @throws IllegalArgumentException if <code>principals</code> 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. |
| * <P> |
| * If none of the above are true, <code>implies</code> 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. |
| * <P> |
| * @param obj the object to test for equality with this object. |
| * |
| * @return true if <i>obj</i> 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. |
| * <br> |
| * 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<Permission> perms; |
| |
| public KrbDelegationPermissionCollection() { |
| perms = new ArrayList<Permission>(); |
| } |
| |
| |
| /** |
| * Check and see if this collection of permissions implies the permissions |
| * expressed in "permission". |
| * |
| * @param p the Permission object to compare |
| * |
| * @return true if "permission" is a proper subset of a permission in |
| * the collection, false if not. |
| */ |
| |
| public boolean implies(Permission permission) { |
| if (! (permission instanceof DelegationPermission)) |
| return false; |
| |
| synchronized (this) { |
| for (Permission x : perms) { |
| if (x.implies(permission)) |
| return true; |
| } |
| } |
| return false; |
| |
| } |
| |
| /** |
| * Adds a permission to the DelegationPermissions. The key for |
| * the hash is the name. |
| * |
| * @param permission the Permission object to add. |
| * |
| * @exception IllegalArgumentException - if the permission is not a |
| * DelegationPermission |
| * |
| * @exception SecurityException - if this PermissionCollection object |
| * has been marked readonly |
| */ |
| |
| public void add(Permission permission) { |
| if (! (permission instanceof DelegationPermission)) |
| throw new IllegalArgumentException("invalid permission: "+ |
| permission); |
| if (isReadOnly()) |
| throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection"); |
| |
| synchronized (this) { |
| perms.add(0, permission); |
| } |
| } |
| |
| /** |
| * Returns an enumeration of all the DelegationPermission objects |
| * in the container. |
| * |
| * @return an enumeration of all the DelegationPermission objects. |
| */ |
| |
| public Enumeration<Permission> elements() { |
| // Convert Iterator into Enumeration |
| synchronized (this) { |
| return Collections.enumeration(perms); |
| } |
| } |
| |
| private static final long serialVersionUID = -3383936936589966948L; |
| |
| // Need to maintain serialization interoperability with earlier releases, |
| // which had the serializable field: |
| // private Vector permissions; |
| /** |
| * @serialField permissions java.util.Vector |
| * A list of DelegationPermission objects. |
| */ |
| private static final ObjectStreamField[] serialPersistentFields = { |
| new ObjectStreamField("permissions", Vector.class), |
| }; |
| |
| /** |
| * @serialData "permissions" field (a Vector containing the DelegationPermissions). |
| */ |
| /* |
| * Writes the contents of the perms field out as a Vector for |
| * serialization compatibility with earlier releases. |
| */ |
| private void writeObject(ObjectOutputStream out) throws IOException { |
| // Don't call out.defaultWriteObject() |
| |
| // Write out Vector |
| Vector<Permission> permissions = new Vector<Permission>(perms.size()); |
| |
| synchronized (this) { |
| permissions.addAll(perms); |
| } |
| |
| ObjectOutputStream.PutField pfields = out.putFields(); |
| pfields.put("permissions", permissions); |
| out.writeFields(); |
| } |
| |
| /* |
| * Reads in a Vector of DelegationPermissions and saves them in the perms field. |
| */ |
| private void readObject(ObjectInputStream in) throws IOException, |
| ClassNotFoundException { |
| // Don't call defaultReadObject() |
| |
| // Read in serialized fields |
| ObjectInputStream.GetField gfields = in.readFields(); |
| |
| // Get the one we want |
| Vector<Permission> permissions = |
| (Vector<Permission>)gfields.get("permissions", null); |
| perms = new ArrayList<Permission>(permissions.size()); |
| perms.addAll(permissions); |
| } |
| } |