author | juh |
Tue, 16 Jul 2013 12:19:41 -0700 | |
changeset 18830 | 90956ead732f |
parent 14342 | 8435a30053c1 |
child 21955 | abc02575919c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.security.auth.kerberos; |
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import java.util.*; |
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import java.security.Permission; |
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import java.security.BasicPermission; |
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import java.security.PermissionCollection; |
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import java.io.ObjectStreamField; |
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import java.io.ObjectOutputStream; |
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import java.io.ObjectInputStream; |
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import java.io.IOException; |
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/** |
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* This class is used to restrict the usage of the Kerberos |
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* delegation model, ie: forwardable and proxiable tickets. |
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* <p> |
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* The target name of this {@code Permission} specifies a pair of |
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* kerberos service principals. The first is the subordinate service principal |
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* being entrusted to use the TGT. The second service principal designates |
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* the target service the subordinate service principal is to |
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* interact with on behalf of the initiating KerberosPrincipal. This |
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* latter service principal is specified to restrict the use of a |
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* proxiable ticket. |
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* <p> |
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* For example, to specify the "host" service use of a forwardable TGT the |
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* target permission is specified as follows: |
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* <p> |
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* <pre> |
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* DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"krbtgt/EXAMPLE.COM@EXAMPLE.COM\""); |
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* </pre> |
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* <p> |
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* To give the "backup" service a proxiable nfs service ticket the target permission |
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* might be specified: |
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* <p> |
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* <pre> |
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* DelegationPermission("\"backup/bar.example.com@EXAMPLE.COM\" \"nfs/home.EXAMPLE.COM@EXAMPLE.COM\""); |
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* </pre> |
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* |
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* @since 1.4 |
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*/ |
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public final class DelegationPermission extends BasicPermission |
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implements java.io.Serializable { |
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private static final long serialVersionUID = 883133252142523922L; |
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private transient String subordinate, service; |
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/** |
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* Create a new {@code DelegationPermission} |
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* with the specified subordinate and target principals. |
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* |
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* <p> |
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* |
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* @param principals the name of the subordinate and target principals |
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* |
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* @throws NullPointerException if {@code principals} is {@code null}. |
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* @throws IllegalArgumentException if {@code principals} is empty. |
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*/ |
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public DelegationPermission(String principals) { |
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super(principals); |
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init(principals); |
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} |
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/** |
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* Create a new {@code DelegationPermission} |
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* with the specified subordinate and target principals. |
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* <p> |
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* |
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* @param principals the name of the subordinate and target principals |
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* <p> |
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* @param actions should be null. |
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* |
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* @throws NullPointerException if {@code principals} is {@code null}. |
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* @throws IllegalArgumentException if {@code principals} is empty. |
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*/ |
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public DelegationPermission(String principals, String actions) { |
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super(principals, actions); |
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init(principals); |
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} |
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/** |
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* Initialize the DelegationPermission object. |
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*/ |
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private void init(String target) { |
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StringTokenizer t = null; |
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if (!target.startsWith("\"")) { |
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throw new IllegalArgumentException |
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("service principal [" + target + |
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"] syntax invalid: " + |
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"improperly quoted"); |
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} else { |
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t = new StringTokenizer(target, "\"", false); |
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subordinate = t.nextToken(); |
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if (t.countTokens() == 2) { |
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t.nextToken(); // bypass whitespace |
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service = t.nextToken(); |
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} else if (t.countTokens() > 0) { |
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throw new IllegalArgumentException |
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("service principal [" + t.nextToken() + |
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"] syntax invalid: " + |
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"improperly quoted"); |
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} |
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} |
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} |
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/** |
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* Checks if this Kerberos delegation permission object "implies" the |
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* specified permission. |
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* <P> |
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* If none of the above are true, {@code implies} returns false. |
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* @param p the permission to check against. |
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* |
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* @return true if the specified permission is implied by this object, |
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* false if not. |
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*/ |
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public boolean implies(Permission p) { |
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if (!(p instanceof DelegationPermission)) |
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return false; |
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DelegationPermission that = (DelegationPermission) p; |
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if (this.subordinate.equals(that.subordinate) && |
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this.service.equals(that.service)) |
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return true; |
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return false; |
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} |
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/** |
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* Checks two DelegationPermission objects for equality. |
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* <P> |
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* @param obj the object to test for equality with this object. |
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* |
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* @return true if <i>obj</i> is a DelegationPermission, and |
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* has the same subordinate and service principal as this. |
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* DelegationPermission object. |
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*/ |
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public boolean equals(Object obj) { |
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if (obj == this) |
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return true; |
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if (! (obj instanceof DelegationPermission)) |
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return false; |
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DelegationPermission that = (DelegationPermission) obj; |
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return implies(that); |
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} |
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/** |
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* Returns the hash code value for this object. |
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* |
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* @return a hash code value for this object. |
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*/ |
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public int hashCode() { |
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return getName().hashCode(); |
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} |
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/** |
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* Returns a PermissionCollection object for storing |
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* DelegationPermission objects. |
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* <br> |
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* DelegationPermission objects must be stored in a manner that |
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* allows them to be inserted into the collection in any order, but |
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* that also enables the PermissionCollection implies method to |
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* be implemented in an efficient (and consistent) manner. |
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* |
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* @return a new PermissionCollection object suitable for storing |
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* DelegationPermissions. |
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*/ |
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public PermissionCollection newPermissionCollection() { |
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return new KrbDelegationPermissionCollection(); |
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} |
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/** |
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* WriteObject is called to save the state of the DelegationPermission |
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* to a stream. The actions are serialized, and the superclass |
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* takes care of the name. |
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*/ |
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private synchronized void writeObject(java.io.ObjectOutputStream s) |
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throws IOException |
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{ |
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s.defaultWriteObject(); |
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} |
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/** |
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* readObject is called to restore the state of the |
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* DelegationPermission from a stream. |
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*/ |
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private synchronized void readObject(java.io.ObjectInputStream s) |
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throws IOException, ClassNotFoundException |
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{ |
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// Read in the action, then initialize the rest |
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s.defaultReadObject(); |
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init(getName()); |
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} |
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/* |
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public static void main(String args[]) throws Exception { |
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DelegationPermission this_ = |
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new DelegationPermission(args[0]); |
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DelegationPermission that_ = |
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new DelegationPermission(args[1]); |
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System.out.println("-----\n"); |
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System.out.println("this.implies(that) = " + this_.implies(that_)); |
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System.out.println("-----\n"); |
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System.out.println("this = "+this_); |
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System.out.println("-----\n"); |
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System.out.println("that = "+that_); |
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System.out.println("-----\n"); |
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KrbDelegationPermissionCollection nps = |
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new KrbDelegationPermissionCollection(); |
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nps.add(this_); |
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nps.add(new DelegationPermission("\"host/foo.example.com@EXAMPLE.COM\" \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\"")); |
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try { |
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nps.add(new DelegationPermission("host/foo.example.com@EXAMPLE.COM \"CN=Gary Ellison/OU=JSN/O=SUNW/L=Palo Alto/ST=CA/C=US\"")); |
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} catch (Exception e) { |
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System.err.println(e); |
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} |
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System.out.println("nps.implies(that) = " + nps.implies(that_)); |
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System.out.println("-----\n"); |
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Enumeration e = nps.elements(); |
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while (e.hasMoreElements()) { |
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DelegationPermission x = |
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(DelegationPermission) e.nextElement(); |
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System.out.println("nps.e = " + x); |
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} |
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} |
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*/ |
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} |
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final class KrbDelegationPermissionCollection extends PermissionCollection |
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implements java.io.Serializable { |
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// Not serialized; see serialization section at end of class. |
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private transient List<Permission> perms; |
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public KrbDelegationPermissionCollection() { |
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perms = new ArrayList<Permission>(); |
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} |
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/** |
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* Check and see if this collection of permissions implies the permissions |
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* expressed in "permission". |
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* |
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* @param permission the Permission object to compare |
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* |
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* @return true if "permission" is a proper subset of a permission in |
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* the collection, false if not. |
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*/ |
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public boolean implies(Permission permission) { |
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if (! (permission instanceof DelegationPermission)) |
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return false; |
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synchronized (this) { |
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for (Permission x : perms) { |
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if (x.implies(permission)) |
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return true; |
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} |
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} |
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return false; |
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} |
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/** |
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* Adds a permission to the DelegationPermissions. The key for |
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* the hash is the name. |
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* |
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* @param permission the Permission object to add. |
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* |
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* @exception IllegalArgumentException - if the permission is not a |
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* DelegationPermission |
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* |
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* @exception SecurityException - if this PermissionCollection object |
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* has been marked readonly |
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*/ |
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public void add(Permission permission) { |
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if (! (permission instanceof DelegationPermission)) |
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throw new IllegalArgumentException("invalid permission: "+ |
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permission); |
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if (isReadOnly()) |
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throw new SecurityException("attempt to add a Permission to a readonly PermissionCollection"); |
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synchronized (this) { |
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perms.add(0, permission); |
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} |
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} |
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/** |
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* Returns an enumeration of all the DelegationPermission objects |
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* in the container. |
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* |
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* @return an enumeration of all the DelegationPermission objects. |
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*/ |
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public Enumeration<Permission> elements() { |
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// Convert Iterator into Enumeration |
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synchronized (this) { |
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return Collections.enumeration(perms); |
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} |
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} |
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private static final long serialVersionUID = -3383936936589966948L; |
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// Need to maintain serialization interoperability with earlier releases, |
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// which had the serializable field: |
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// private Vector permissions; |
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/** |
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* @serialField permissions java.util.Vector |
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* A list of DelegationPermission objects. |
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*/ |
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private static final ObjectStreamField[] serialPersistentFields = { |
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new ObjectStreamField("permissions", Vector.class), |
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}; |
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/** |
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* @serialData "permissions" field (a Vector containing the DelegationPermissions). |
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*/ |
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/* |
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* Writes the contents of the perms field out as a Vector for |
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* serialization compatibility with earlier releases. |
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*/ |
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private void writeObject(ObjectOutputStream out) throws IOException { |
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// Don't call out.defaultWriteObject() |
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// Write out Vector |
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7970
af1579474d16
7008728: diamond conversion of basic security, permissions, authentication
smarks
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5506
diff
changeset
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Vector<Permission> permissions = new Vector<>(perms.size()); |
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synchronized (this) { |
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permissions.addAll(perms); |
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} |
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ObjectOutputStream.PutField pfields = out.putFields(); |
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pfields.put("permissions", permissions); |
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out.writeFields(); |
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} |
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/* |
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* Reads in a Vector of DelegationPermissions and saves them in the perms field. |
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*/ |
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10709
d865c9f21240
7092375: Security Libraries don't build with javac -Werror
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changeset
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@SuppressWarnings("unchecked") |
14014 | 375 |
private void readObject(ObjectInputStream in) |
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throws IOException, ClassNotFoundException |
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{ |
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// Don't call defaultReadObject() |
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// Read in serialized fields |
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ObjectInputStream.GetField gfields = in.readFields(); |
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// Get the one we want |
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Vector<Permission> permissions = |
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(Vector<Permission>)gfields.get("permissions", null); |
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perms = new ArrayList<Permission>(permissions.size()); |
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perms.addAll(permissions); |
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} |
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} |