src/java.security.jgss/share/classes/javax/security/auth/kerberos/DelegationPermission.java
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.security.jgss/share/classes/javax/security/auth/kerberos/DelegationPermission.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,339 @@
+/*
+ * Copyright (c) 2000, 2015, 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.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamField;
+import java.security.BasicPermission;
+import java.security.Permission;
+import java.security.PermissionCollection;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * 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} 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:
+ *
+ * <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:
+ *
+ * <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}
+ * 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.
+ * <P>
+ * This method returns true if this {@code DelegationPermission}
+ * is equal to {@code p}, and returns false otherwise.
+ *
+ * @param p the permission to check against.
+ *
+ * @return true if the specified permission is implied by this object,
+ * false if not.
+ */
+ @Override
+ public boolean implies(Permission p) {
+ return equals(p);
+ }
+
+ /**
+ * Checks two DelegationPermission objects for equality.
+ *
+ * @param obj the object to test for equality with this object.
+ *
+ * @return true if {@code obj} is a DelegationPermission, and
+ * has the same subordinate and service principal as this
+ * DelegationPermission object.
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (obj == this) {
+ return true;
+ }
+
+ if (!(obj instanceof DelegationPermission)) {
+ return false;
+ }
+
+ DelegationPermission that = (DelegationPermission) obj;
+
+ return this.subordinate.equals(that.subordinate) &&
+ this.service.equals(that.service);
+ }
+
+ /**
+ * Returns the hash code value for this object.
+ *
+ * @return a hash code value for this object.
+ */
+ @Override
+ public int hashCode() {
+ return 17 * subordinate.hashCode() + 31 * service.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.
+ */
+ @Override
+ 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());
+ }
+
+}
+
+
+final class KrbDelegationPermissionCollection extends PermissionCollection
+ implements java.io.Serializable {
+
+ // Not serialized; see serialization section at end of class.
+ private transient ConcurrentHashMap<Permission, Boolean> perms;
+
+ public KrbDelegationPermissionCollection() {
+ perms = new ConcurrentHashMap<>();
+ }
+
+ /**
+ * Check and see if this collection of permissions implies the permissions
+ * expressed in "permission".
+ *
+ * @param permission the Permission object to compare
+ *
+ * @return true if "permission" is a proper subset of a permission in
+ * the collection, false if not.
+ */
+ @Override
+ public boolean implies(Permission permission) {
+ if (! (permission instanceof DelegationPermission))
+ return false;
+
+ // if map contains key, then it automatically implies it
+ return perms.containsKey(permission);
+ }
+
+ /**
+ * 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
+ */
+ @Override
+ 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");
+
+ perms.put(permission, Boolean.TRUE);
+ }
+
+ /**
+ * Returns an enumeration of all the DelegationPermission objects
+ * in the container.
+ *
+ * @return an enumeration of all the DelegationPermission objects.
+ */
+ @Override
+ public Enumeration<Permission> elements() {
+ return perms.keys();
+ }
+
+ 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<>(perms.keySet());
+
+ ObjectOutputStream.PutField pfields = out.putFields();
+ pfields.put("permissions", permissions);
+ out.writeFields();
+ }
+
+ /*
+ * Reads in a Vector of DelegationPermissions and saves them in the perms field.
+ */
+ @SuppressWarnings("unchecked")
+ 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 ConcurrentHashMap<>(permissions.size());
+ for (Permission perm : permissions) {
+ perms.put(perm, Boolean.TRUE);
+ }
+ }
+}