/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2011 ForgeRock AS.
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*/
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package org.opends.server.extensions;
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import static org.opends.messages.ExtensionMessages.*;
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import static org.opends.server.loggers.debug.DebugLogger.debugEnabled;
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import static org.opends.server.protocols.ldap.LDAPConstants.*;
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import java.io.Closeable;
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import java.io.IOException;
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import java.net.*;
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import java.util.LinkedHashSet;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Set;
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import java.util.concurrent.ConcurrentLinkedQueue;
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import java.util.concurrent.Semaphore;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.locks.ReentrantReadWriteLock;
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import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
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import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
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import javax.net.ssl.*;
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import org.opends.messages.Message;
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import org.opends.server.admin.server.ConfigurationChangeListener;
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import org.opends.server.admin.std.server.*;
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import org.opends.server.api.AuthenticationPolicy;
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import org.opends.server.api.AuthenticationPolicyFactory;
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import org.opends.server.api.AuthenticationPolicyState;
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import org.opends.server.api.TrustManagerProvider;
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import org.opends.server.config.ConfigException;
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import org.opends.server.core.DirectoryServer;
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import org.opends.server.loggers.debug.DebugLogger;
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import org.opends.server.loggers.debug.DebugTracer;
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import org.opends.server.protocols.asn1.ASN1Exception;
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import org.opends.server.protocols.ldap.*;
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import org.opends.server.tools.LDAPReader;
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import org.opends.server.tools.LDAPWriter;
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import org.opends.server.types.*;
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import org.opends.server.util.StaticUtils;
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/**
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* LDAP pass through authentication policy implementation.
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*/
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public final class LDAPPassThroughAuthenticationPolicyFactory implements
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AuthenticationPolicyFactory<LDAPPassThroughAuthenticationPolicyCfg>
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{
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// TODO: retry operations transparently until all connections exhausted.
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// TODO: handle password policy response controls? AD?
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// TODO: periodically ping offline servers in order to detect when they come
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// back.
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// FIXME: validate host/port (check port in range).
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/**
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* An LDAP connection which will be used in order to search for or
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* authenticate users.
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*/
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static interface Connection extends Closeable
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{
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/**
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* Closes this connection.
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*/
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@Override
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void close();
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/**
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* Returns the name of the user whose entry matches the provided search
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* criteria. This will return CLIENT_SIDE_NO_RESULTS_RETURNED/NO_SUCH_OBJECT
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* if no search results were returned, or CLIENT_SIDE_MORE_RESULTS_TO_RETURN
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* if too many results were returned.
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*
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* @param baseDN
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* The search base DN.
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* @param scope
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* The search scope.
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* @param filter
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* The search filter.
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* @return The name of the user whose entry matches the provided search
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* criteria.
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* @throws DirectoryException
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* If the search returned no entries, more than one entry, or if
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* the search failed unexpectedly.
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*/
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ByteString search(DN baseDN, SearchScope scope, SearchFilter filter)
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throws DirectoryException;
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/**
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* Performs a simple bind for the user.
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*
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* @param username
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* The user name (usually a bind DN).
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* @param password
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* The user's password.
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* @throws DirectoryException
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* If the credentials were invalid, or the authentication failed
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* unexpectedly.
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*/
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void simpleBind(ByteString username, ByteString password)
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throws DirectoryException;
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}
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/**
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* An interface for obtaining connections: users of this interface will obtain
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* a connection, perform a single operation (search or bind), and then close
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* it.
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*/
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static interface ConnectionFactory
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{
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/**
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* Returns a connection which can be used in order to search for or
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* authenticate users.
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*
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* @return The connection.
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* @throws DirectoryException
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* If an unexpected error occurred while attempting to obtain a
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* connection.
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*/
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Connection getConnection() throws DirectoryException;
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}
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/**
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* An interface for obtaining a connection factory for LDAP connections to a
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* named LDAP server.
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*/
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static interface LDAPConnectionFactoryProvider
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{
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/**
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* Returns a connection factory which can be used for obtaining connections
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* to the specified LDAP server.
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*
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* @param host
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* The LDAP server host name.
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* @param port
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* The LDAP server port.
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* @param options
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* The LDAP connection options.
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* @return A connection factory which can be used for obtaining connections
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* to the specified LDAP server.
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*/
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ConnectionFactory getLDAPConnectionFactory(String host, int port,
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LDAPPassThroughAuthenticationPolicyCfg options);
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}
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/**
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* The PTA design guarantees that connections are only used by a single thread
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* at a time, so we do not need to perform any synchronization.
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* <p>
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* Package private for testing.
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*/
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static final class LDAPConnectionFactory implements ConnectionFactory
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{
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/**
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* LDAP connection implementation.
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*/
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private final class LDAPConnection implements Connection
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{
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private final Socket plainSocket;
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private final Socket ldapSocket;
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private final LDAPWriter writer;
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private final LDAPReader reader;
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private int nextMessageID = 1;
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private boolean isClosed = false;
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private LDAPConnection(final Socket plainSocket, final Socket ldapSocket,
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final LDAPReader reader, final LDAPWriter writer)
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{
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this.plainSocket = plainSocket;
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this.ldapSocket = ldapSocket;
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this.reader = reader;
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this.writer = writer;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void close()
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{
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/*
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* This method is intentionally a bit "belt and braces" because we have
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* seen far too many subtle resource leaks due to bugs within JDK,
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* especially when used in conjunction with SSL (e.g.
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* http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7025227).
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*/
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if (isClosed)
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{
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return;
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}
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isClosed = true;
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// Send an unbind request.
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final LDAPMessage message = new LDAPMessage(nextMessageID++,
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new UnbindRequestProtocolOp());
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try
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{
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writer.writeMessage(message);
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}
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catch (final IOException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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// Close all IO resources.
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writer.close();
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reader.close();
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try
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{
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ldapSocket.close();
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}
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catch (final IOException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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try
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{
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plainSocket.close();
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}
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catch (final IOException e)
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{
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if (debugEnabled())
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{
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TRACER.debugCaught(DebugLogLevel.ERROR, e);
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}
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public ByteString search(final DN baseDN, final SearchScope scope,
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final SearchFilter filter) throws DirectoryException
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{
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// Create the search request and send it to the server.
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final SearchRequestProtocolOp searchRequest =
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new SearchRequestProtocolOp(
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ByteString.valueOf(baseDN.toString()), scope,
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DereferencePolicy.DEREF_ALWAYS, 1 /* size limit */,
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(timeoutMS / 1000), true /* types only */,
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RawFilter.create(filter), NO_ATTRIBUTES);
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sendRequest(searchRequest);
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// Read the responses from the server. We cannot fail-fast since this
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// could leave unread search response messages.
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byte opType;
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ByteString username = null;
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int resultCount = 0;
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do
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{
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final LDAPMessage responseMessage = readResponse();
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opType = responseMessage.getProtocolOpType();
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switch (opType)
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{
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case OP_TYPE_SEARCH_RESULT_ENTRY:
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final SearchResultEntryProtocolOp searchEntry = responseMessage
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.getSearchResultEntryProtocolOp();
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if (username == null)
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{
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username = ByteString.valueOf(searchEntry.getDN().toString());
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}
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resultCount++;
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break;
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case OP_TYPE_SEARCH_RESULT_REFERENCE:
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// The reference does not necessarily mean that there would have
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// been any matching results, so lets ignore it.
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break;
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case OP_TYPE_SEARCH_RESULT_DONE:
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final SearchResultDoneProtocolOp searchResult = responseMessage
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.getSearchResultDoneProtocolOp();
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final ResultCode resultCode = ResultCode.valueOf(searchResult
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.getResultCode());
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switch (resultCode)
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{
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case SUCCESS:
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// The search succeeded. Drop out of the loop and check that we
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// got a matching entry.
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break;
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case SIZE_LIMIT_EXCEEDED:
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// Multiple matching candidates.
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throw new DirectoryException(
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ResultCode.CLIENT_SIDE_MORE_RESULTS_TO_RETURN,
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ERR_LDAP_PTA_CONNECTION_SEARCH_SIZE_LIMIT.get(host, port,
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String.valueOf(options.dn()), String.valueOf(baseDN),
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String.valueOf(filter)));
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default:
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// The search failed for some reason.
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throw new DirectoryException(resultCode,
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ERR_LDAP_PTA_CONNECTION_SEARCH_FAILED.get(host, port,
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String.valueOf(options.dn()), String.valueOf(baseDN),
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String.valueOf(filter), resultCode.getIntValue(),
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resultCode.getResultCodeName(),
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searchResult.getErrorMessage()));
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}
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break;
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default:
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// Check for disconnect notifications.
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handleUnexpectedResponse(responseMessage);
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break;
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}
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}
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while (opType != OP_TYPE_SEARCH_RESULT_DONE);
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if (resultCount > 1)
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{
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// Multiple matching candidates.
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throw new DirectoryException(
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ResultCode.CLIENT_SIDE_MORE_RESULTS_TO_RETURN,
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ERR_LDAP_PTA_CONNECTION_SEARCH_SIZE_LIMIT.get(host, port,
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String.valueOf(options.dn()), String.valueOf(baseDN),
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String.valueOf(filter)));
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}
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if (username == null)
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{
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// No matching entries found.
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throw new DirectoryException(
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ResultCode.CLIENT_SIDE_NO_RESULTS_RETURNED,
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ERR_LDAP_PTA_CONNECTION_SEARCH_NO_MATCHES.get(host, port,
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String.valueOf(options.dn()), String.valueOf(baseDN),
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String.valueOf(filter)));
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}
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return username;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public void simpleBind(final ByteString username,
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final ByteString password) throws DirectoryException
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{
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// Create the bind request and send it to the server.
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final BindRequestProtocolOp bindRequest = new BindRequestProtocolOp(
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username, 3, password);
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sendRequest(bindRequest);
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// Read the response from the server.
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final LDAPMessage responseMessage = readResponse();
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switch (responseMessage.getProtocolOpType())
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{
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case OP_TYPE_BIND_RESPONSE:
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final BindResponseProtocolOp bindResponse = responseMessage
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.getBindResponseProtocolOp();
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final ResultCode resultCode = ResultCode.valueOf(bindResponse
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.getResultCode());
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if (resultCode == ResultCode.SUCCESS)
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{
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// FIXME: need to look for things like password expiration
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// warning, reset notice, etc.
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return;
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}
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else
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{
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// The bind failed for some reason.
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throw new DirectoryException(resultCode,
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ERR_LDAP_PTA_CONNECTION_BIND_FAILED.get(host, port,
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String.valueOf(options.dn()), String.valueOf(username),
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resultCode.getIntValue(), resultCode.getResultCodeName(),
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bindResponse.getErrorMessage()));
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}
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default:
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// Check for disconnect notifications.
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handleUnexpectedResponse(responseMessage);
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break;
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}
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String toString()
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{
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final StringBuilder builder = new StringBuilder();
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builder.append("LDAPConnection(");
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builder.append(String.valueOf(ldapSocket.getLocalSocketAddress()));
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builder.append(", ");
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builder.append(String.valueOf(ldapSocket.getRemoteSocketAddress()));
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builder.append(')');
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return builder.toString();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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protected void finalize()
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{
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close();
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}
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private void handleUnexpectedResponse(final LDAPMessage responseMessage)
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throws DirectoryException
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{
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if (responseMessage.getProtocolOpType() == OP_TYPE_EXTENDED_RESPONSE)
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{
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final ExtendedResponseProtocolOp extendedResponse = responseMessage
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.getExtendedResponseProtocolOp();
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final String responseOID = extendedResponse.getOID();
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if ((responseOID != null)
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&& responseOID.equals(OID_NOTICE_OF_DISCONNECTION))
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{
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throw new DirectoryException(ResultCode.valueOf(extendedResponse
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.getResultCode()), ERR_LDAP_PTA_CONNECTION_DISCONNECTING.get(
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host, port, String.valueOf(options.dn()),
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extendedResponse.getErrorMessage()));
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}
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}
|
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// Unexpected response type.
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throw new DirectoryException(ResultCode.CLIENT_SIDE_DECODING_ERROR,
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ERR_LDAP_PTA_CONNECTION_WRONG_RESPONSE.get(host, port,
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String.valueOf(options.dn()),
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String.valueOf(responseMessage.getProtocolOp())));
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}
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|
|
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// Reads a response message and adapts errors to directory exceptions.
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private LDAPMessage readResponse() throws DirectoryException
|
{
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final LDAPMessage responseMessage;
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try
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{
|
responseMessage = reader.readMessage();
|
}
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catch (final ASN1Exception e)
|
{
|
// ASN1 layer hides all underlying IO exceptions.
|
if (e.getCause() instanceof SocketTimeoutException)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_TIMEOUT,
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ERR_LDAP_PTA_CONNECTION_TIMEOUT.get(host, port,
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String.valueOf(options.dn())), e);
|
}
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else if (e.getCause() instanceof IOException)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_SERVER_DOWN,
|
ERR_LDAP_PTA_CONNECTION_OTHER_ERROR.get(host, port,
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String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
else
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_DECODING_ERROR,
|
ERR_LDAP_PTA_CONNECTION_DECODE_ERROR.get(host, port,
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String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
}
|
catch (final LDAPException e)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_DECODING_ERROR,
|
ERR_LDAP_PTA_CONNECTION_DECODE_ERROR.get(host, port,
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String.valueOf(options.dn()), e.getMessage()), e);
|
}
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catch (final SocketTimeoutException e)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_TIMEOUT,
|
ERR_LDAP_PTA_CONNECTION_TIMEOUT.get(host, port,
|
String.valueOf(options.dn())), e);
|
}
|
catch (final IOException e)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_SERVER_DOWN,
|
ERR_LDAP_PTA_CONNECTION_OTHER_ERROR.get(host, port,
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String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
|
if (responseMessage == null)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_SERVER_DOWN,
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ERR_LDAP_PTA_CONNECTION_CLOSED.get(host, port,
|
String.valueOf(options.dn())));
|
}
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return responseMessage;
|
}
|
|
|
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// Sends a request message and adapts errors to directory exceptions.
|
private void sendRequest(final ProtocolOp request)
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throws DirectoryException
|
{
|
final LDAPMessage requestMessage = new LDAPMessage(nextMessageID++,
|
request);
|
try
|
{
|
writer.writeMessage(requestMessage);
|
}
|
catch (final IOException e)
|
{
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_SERVER_DOWN,
|
ERR_LDAP_PTA_CONNECTION_OTHER_ERROR.get(host, port,
|
String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
}
|
}
|
|
|
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private final String host;
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private final int port;
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private final LDAPPassThroughAuthenticationPolicyCfg options;
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private final int timeoutMS;
|
|
|
|
/**
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* LDAP connection factory implementation is package private so that it can
|
* be tested.
|
*
|
* @param host
|
* The server host name.
|
* @param port
|
* The server port.
|
* @param options
|
* The options (SSL).
|
*/
|
LDAPConnectionFactory(final String host, final int port,
|
final LDAPPassThroughAuthenticationPolicyCfg options)
|
{
|
this.host = host;
|
this.port = port;
|
this.options = options;
|
|
// Normalize the timeoutMS to an integer (admin framework ensures that the
|
// value is non-negative).
|
this.timeoutMS = (int) Math.min(options.getConnectionTimeout(),
|
Integer.MAX_VALUE);
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public Connection getConnection() throws DirectoryException
|
{
|
try
|
{
|
// Create the remote ldapSocket address.
|
final InetAddress address = InetAddress.getByName(host);
|
final InetSocketAddress socketAddress = new InetSocketAddress(address,
|
port);
|
|
// Create the ldapSocket and connect to the remote server.
|
final Socket plainSocket = new Socket();
|
Socket ldapSocket = null;
|
LDAPReader reader = null;
|
LDAPWriter writer = null;
|
LDAPConnection ldapConnection = null;
|
|
try
|
{
|
// Set ldapSocket options before connecting.
|
plainSocket.setTcpNoDelay(options.isUseTCPNoDelay());
|
plainSocket.setKeepAlive(options.isUseTCPKeepAlive());
|
plainSocket.setSoTimeout(timeoutMS);
|
|
// Connect the ldapSocket.
|
plainSocket.connect(socketAddress, timeoutMS);
|
|
if (options.isUseSSL())
|
{
|
// Obtain the configured trust manager which will be used in order
|
// to determine the trust of the remote LDAP server.
|
DN trustManagerDN = options.getTrustManagerProviderDN();
|
TrustManagerProvider<?> trustManagerProvider = DirectoryServer
|
.getTrustManagerProvider(trustManagerDN);
|
TrustManager[] tm = null;
|
if (trustManagerProvider != null)
|
{
|
tm = trustManagerProvider.getTrustManagers();
|
}
|
|
// Create the SSL context and initialize it.
|
SSLContext sslContext = SSLContext.getInstance("TLS");
|
sslContext.init(null /* key managers */, tm, null /* rng */);
|
|
// Create the SSL socket.
|
SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
|
SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(
|
plainSocket, host, port, true);
|
ldapSocket = sslSocket;
|
|
sslSocket.setUseClientMode(true);
|
if (!options.getSSLProtocol().isEmpty())
|
{
|
sslSocket.setEnabledProtocols(options.getSSLProtocol().toArray(
|
new String[0]));
|
}
|
if (!options.getSSLCipherSuite().isEmpty())
|
{
|
sslSocket.setEnabledCipherSuites(options.getSSLCipherSuite()
|
.toArray(new String[0]));
|
}
|
|
// Force TLS negotiation.
|
sslSocket.startHandshake();
|
}
|
else
|
{
|
ldapSocket = plainSocket;
|
}
|
|
reader = new LDAPReader(ldapSocket);
|
writer = new LDAPWriter(ldapSocket);
|
|
ldapConnection = new LDAPConnection(plainSocket, ldapSocket, reader,
|
writer);
|
|
return ldapConnection;
|
}
|
finally
|
{
|
if (ldapConnection == null)
|
{
|
// Connection creation failed for some reason, so clean up IO
|
// resources.
|
if (reader != null)
|
{
|
reader.close();
|
}
|
if (writer != null)
|
{
|
writer.close();
|
}
|
|
if (ldapSocket != null)
|
{
|
try
|
{
|
ldapSocket.close();
|
}
|
catch (final IOException ignored)
|
{
|
// Ignore.
|
}
|
}
|
|
if (ldapSocket != plainSocket)
|
{
|
try
|
{
|
plainSocket.close();
|
}
|
catch (final IOException ignored)
|
{
|
// Ignore.
|
}
|
}
|
}
|
}
|
}
|
catch (final UnknownHostException e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_CONNECT_ERROR,
|
ERR_LDAP_PTA_CONNECT_UNKNOWN_HOST.get(host, port,
|
String.valueOf(options.dn()), host), e);
|
}
|
catch (final ConnectException e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_CONNECT_ERROR,
|
ERR_LDAP_PTA_CONNECT_ERROR.get(host, port,
|
String.valueOf(options.dn()), port), e);
|
}
|
catch (final SocketTimeoutException e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_TIMEOUT,
|
ERR_LDAP_PTA_CONNECT_TIMEOUT.get(host, port,
|
String.valueOf(options.dn())), e);
|
}
|
catch (final SSLException e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_CONNECT_ERROR,
|
ERR_LDAP_PTA_CONNECT_SSL_ERROR.get(host, port,
|
String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
catch (final Exception e)
|
{
|
if (debugEnabled())
|
{
|
TRACER.debugCaught(DebugLogLevel.ERROR, e);
|
}
|
throw new DirectoryException(ResultCode.CLIENT_SIDE_CONNECT_ERROR,
|
ERR_LDAP_PTA_CONNECT_OTHER_ERROR.get(host, port,
|
String.valueOf(options.dn()), e.getMessage()), e);
|
}
|
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public String toString()
|
{
|
final StringBuilder builder = new StringBuilder();
|
builder.append("LDAPConnectionFactory(");
|
builder.append(host);
|
builder.append(':');
|
builder.append(port);
|
builder.append(')');
|
return builder.toString();
|
}
|
}
|
|
|
|
/**
|
* LDAP PTA policy implementation.
|
*/
|
private final class PolicyImpl extends AuthenticationPolicy implements
|
ConfigurationChangeListener<LDAPPassThroughAuthenticationPolicyCfg>
|
{
|
|
/**
|
* A factory which returns pre-authenticated connections for searches.
|
*/
|
private final class AuthenticatedConnectionFactory implements
|
ConnectionFactory
|
{
|
|
private final ConnectionFactory factory;
|
|
|
|
private AuthenticatedConnectionFactory(final ConnectionFactory factory)
|
{
|
this.factory = factory;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public Connection getConnection() throws DirectoryException
|
{
|
final DN username = configuration.getMappedSearchBindDN();
|
final String password = configuration.getMappedSearchBindPassword();
|
|
final Connection connection = factory.getConnection();
|
if (username != null && !username.isNullDN() && password != null
|
&& password.length() > 0)
|
{
|
try
|
{
|
connection.simpleBind(ByteString.valueOf(username.toString()),
|
ByteString.valueOf(password));
|
}
|
catch (final DirectoryException e)
|
{
|
connection.close();
|
throw e;
|
}
|
}
|
return connection;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public String toString()
|
{
|
final StringBuilder builder = new StringBuilder();
|
builder.append("AuthenticationConnectionFactory(");
|
builder.append(factory);
|
builder.append(')');
|
return builder.toString();
|
}
|
|
}
|
|
|
|
/**
|
* PTA connection pool.
|
*/
|
private final class ConnectionPool implements ConnectionFactory, Closeable
|
{
|
|
/**
|
* Pooled connection's intercept close and release connection back to the
|
* pool.
|
*/
|
private final class PooledConnection implements Connection
|
{
|
private final Connection connection;
|
private boolean connectionIsClosed = false;
|
|
|
|
private PooledConnection(final Connection connection)
|
{
|
this.connection = connection;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public void close()
|
{
|
if (!connectionIsClosed)
|
{
|
connectionIsClosed = true;
|
|
// Guarded by PolicyImpl
|
if (poolIsClosed)
|
{
|
connection.close();
|
}
|
else
|
{
|
connectionPool.offer(connection);
|
}
|
availableConnections.release();
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public ByteString search(final DN baseDN, final SearchScope scope,
|
final SearchFilter filter) throws DirectoryException
|
{
|
try
|
{
|
return connection.search(baseDN, scope, filter);
|
}
|
catch (final DirectoryException e)
|
{
|
// Don't put the connection back in the pool if it has failed.
|
closeConnectionOnFatalError(e);
|
throw e;
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public void simpleBind(final ByteString username,
|
final ByteString password) throws DirectoryException
|
{
|
try
|
{
|
connection.simpleBind(username, password);
|
}
|
catch (final DirectoryException e)
|
{
|
// Don't put the connection back in the pool if it has failed.
|
closeConnectionOnFatalError(e);
|
throw e;
|
}
|
}
|
|
|
|
private void closeConnectionOnFatalError(final DirectoryException e)
|
{
|
if (isFatalResultCode(e.getResultCode()))
|
{
|
if (!connectionIsClosed)
|
{
|
connectionIsClosed = true;
|
connection.close();
|
availableConnections.release();
|
}
|
}
|
}
|
|
}
|
|
|
|
// Guarded by PolicyImpl.lock.
|
private boolean poolIsClosed = false;
|
|
private final ConnectionFactory factory;
|
private final int poolSize =
|
Runtime.getRuntime().availableProcessors() * 2;
|
private final Semaphore availableConnections = new Semaphore(poolSize);
|
private final ConcurrentLinkedQueue<Connection> connectionPool =
|
new ConcurrentLinkedQueue<Connection>();
|
|
|
|
private ConnectionPool(final ConnectionFactory factory)
|
{
|
this.factory = factory;
|
}
|
|
|
|
/**
|
* Release all connections: do we want to block?
|
*/
|
@Override
|
public void close()
|
{
|
// No need for synchronization as this can only be called with the
|
// policy's exclusive lock.
|
poolIsClosed = true;
|
|
Connection connection;
|
while ((connection = connectionPool.poll()) != null)
|
{
|
connection.close();
|
}
|
|
// Since we have the exclusive lock, there should be no more connections
|
// in use.
|
if (availableConnections.availablePermits() != poolSize)
|
{
|
throw new IllegalStateException(
|
"Pool has remaining connections open after close");
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public Connection getConnection() throws DirectoryException
|
{
|
// This should only be called with the policy's shared lock.
|
if (poolIsClosed)
|
{
|
throw new IllegalStateException("pool is closed");
|
}
|
|
availableConnections.acquireUninterruptibly();
|
|
// There is either a pooled connection or we are allowed to create
|
// one.
|
Connection connection = connectionPool.poll();
|
if (connection == null)
|
{
|
try
|
{
|
connection = factory.getConnection();
|
}
|
catch (final DirectoryException e)
|
{
|
availableConnections.release();
|
throw e;
|
}
|
}
|
|
return new PooledConnection(connection);
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public String toString()
|
{
|
final StringBuilder builder = new StringBuilder();
|
builder.append("ConnectionPool(");
|
builder.append(factory);
|
builder.append(", poolSize=");
|
builder.append(poolSize);
|
builder.append(", inPool=");
|
builder.append(connectionPool.size());
|
builder.append(", available=");
|
builder.append(availableConnections.availablePermits());
|
builder.append(')');
|
return builder.toString();
|
}
|
}
|
|
|
|
/**
|
* A simplistic two-way fail-over connection factory implementation.
|
*/
|
private final class FailoverConnectionFactory implements ConnectionFactory,
|
Closeable
|
{
|
private final LoadBalancer primary;
|
private final LoadBalancer secondary;
|
|
|
|
private FailoverConnectionFactory(final LoadBalancer primary,
|
final LoadBalancer secondary)
|
{
|
this.primary = primary;
|
this.secondary = secondary;
|
}
|
|
|
|
/**
|
* Close underlying load-balancers.
|
*/
|
@Override
|
public void close()
|
{
|
primary.close();
|
if (secondary != null)
|
{
|
secondary.close();
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public Connection getConnection() throws DirectoryException
|
{
|
if (secondary == null)
|
{
|
// No fail-over so just use the primary.
|
return primary.getConnection();
|
}
|
else
|
{
|
try
|
{
|
return primary.getConnection();
|
}
|
catch (final DirectoryException e)
|
{
|
return secondary.getConnection();
|
}
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public String toString()
|
{
|
final StringBuilder builder = new StringBuilder();
|
builder.append("FailoverConnectionFactory(");
|
builder.append(primary);
|
builder.append(", ");
|
builder.append(secondary);
|
builder.append(')');
|
return builder.toString();
|
}
|
|
}
|
|
|
|
/**
|
* A simplistic load-balancer connection factory implementation using
|
* approximately round-robin balancing.
|
*/
|
private final class LoadBalancer implements ConnectionFactory, Closeable
|
{
|
private final ConnectionPool[] factories;
|
private final AtomicInteger nextIndex = new AtomicInteger();
|
private final int maxIndex;
|
|
|
|
private LoadBalancer(final ConnectionPool[] factories)
|
{
|
this.factories = factories;
|
this.maxIndex = factories.length;
|
}
|
|
|
|
/**
|
* Close underlying connection pools.
|
*/
|
@Override
|
public void close()
|
{
|
for (final ConnectionPool pool : factories)
|
{
|
pool.close();
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public Connection getConnection() throws DirectoryException
|
{
|
final int startIndex = getStartIndex();
|
int index = startIndex;
|
for (;;)
|
{
|
final ConnectionFactory factory = factories[index];
|
|
try
|
{
|
return factory.getConnection();
|
}
|
catch (final DirectoryException e)
|
{
|
// Try the next index.
|
if (++index == maxIndex)
|
{
|
index = 0;
|
}
|
|
// If all the factories have been tried then give up and throw the
|
// exception.
|
if (index == startIndex)
|
{
|
throw e;
|
}
|
}
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public String toString()
|
{
|
final StringBuilder builder = new StringBuilder();
|
builder.append("LoadBalancer(");
|
builder.append(nextIndex);
|
for (final ConnectionFactory factory : factories)
|
{
|
builder.append(", ");
|
builder.append(factory);
|
}
|
builder.append(')');
|
return builder.toString();
|
}
|
|
|
|
// Determine the start index.
|
private int getStartIndex()
|
{
|
// A round robin pool of one connection factories is unlikely in
|
// practice and requires special treatment.
|
if (maxIndex == 1)
|
{
|
return 0;
|
}
|
|
// Determine the next factory to use: avoid blocking algorithm.
|
int oldNextIndex;
|
int newNextIndex;
|
do
|
{
|
oldNextIndex = nextIndex.get();
|
newNextIndex = oldNextIndex + 1;
|
if (newNextIndex == maxIndex)
|
{
|
newNextIndex = 0;
|
}
|
}
|
while (!nextIndex.compareAndSet(oldNextIndex, newNextIndex));
|
|
// There's a potential, but benign, race condition here: other threads
|
// could jump in and rotate through the list before we return the
|
// connection factory.
|
return newNextIndex;
|
}
|
|
}
|
|
|
|
/**
|
* LDAP PTA policy state implementation.
|
*/
|
private final class StateImpl extends AuthenticationPolicyState
|
{
|
|
private final Entry userEntry;
|
private ByteString cachedPassword = null;
|
|
|
|
private StateImpl(final Entry userEntry)
|
{
|
this.userEntry = userEntry;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public void finalizeStateAfterBind() throws DirectoryException
|
{
|
if (cachedPassword != null)
|
{
|
// TODO: persist cached password if needed.
|
cachedPassword = null;
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public AuthenticationPolicy getAuthenticationPolicy()
|
{
|
return PolicyImpl.this;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public boolean passwordMatches(final ByteString password)
|
throws DirectoryException
|
{
|
sharedLock.lock();
|
try
|
{
|
// First of determine the user name to use when binding to the remote
|
// directory.
|
ByteString username = null;
|
|
switch (configuration.getMappingPolicy())
|
{
|
case UNMAPPED:
|
// The bind DN is the name of the user's entry.
|
username = ByteString.valueOf(userEntry.getDN().toString());
|
break;
|
case MAPPED_BIND:
|
// The bind DN is contained in an attribute in the user's entry.
|
mapBind: for (final AttributeType at : configuration
|
.getMappedAttribute())
|
{
|
final List<Attribute> attributes = userEntry.getAttribute(at);
|
if (attributes != null && !attributes.isEmpty())
|
{
|
for (final Attribute attribute : attributes)
|
{
|
if (!attribute.isEmpty())
|
{
|
username = attribute.iterator().next().getValue();
|
break mapBind;
|
}
|
}
|
}
|
}
|
|
if (username == null)
|
{
|
/*
|
* The mapping attribute(s) is not present in the entry. This
|
* could be a configuration error, but it could also be because
|
* someone is attempting to authenticate using a bind DN which
|
* references a non-user entry.
|
*/
|
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPING_ATTRIBUTE_NOT_FOUND.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()),
|
StaticUtils.collectionToString(
|
configuration.getMappedAttribute(), ", ")));
|
}
|
|
break;
|
case MAPPED_SEARCH:
|
// A search against the remote directory is required in order to
|
// determine the bind DN.
|
|
// Construct the search filter.
|
final LinkedList<SearchFilter> filterComponents =
|
new LinkedList<SearchFilter>();
|
for (final AttributeType at : configuration.getMappedAttribute())
|
{
|
final List<Attribute> attributes = userEntry.getAttribute(at);
|
if (attributes != null && !attributes.isEmpty())
|
{
|
for (final Attribute attribute : attributes)
|
{
|
for (final AttributeValue value : attribute)
|
{
|
filterComponents.add(SearchFilter.createEqualityFilter(at,
|
value));
|
}
|
}
|
}
|
}
|
|
if (filterComponents.isEmpty())
|
{
|
/*
|
* The mapping attribute(s) is not present in the entry. This
|
* could be a configuration error, but it could also be because
|
* someone is attempting to authenticate using a bind DN which
|
* references a non-user entry.
|
*/
|
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPING_ATTRIBUTE_NOT_FOUND.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()),
|
StaticUtils.collectionToString(
|
configuration.getMappedAttribute(), ", ")));
|
}
|
|
final SearchFilter filter;
|
if (filterComponents.size() == 1)
|
{
|
filter = filterComponents.getFirst();
|
}
|
else
|
{
|
filter = SearchFilter.createORFilter(filterComponents);
|
}
|
|
// Now search the configured base DNs, stopping at the first
|
// success.
|
for (final DN baseDN : configuration.getMappedSearchBaseDN())
|
{
|
Connection connection = null;
|
try
|
{
|
connection = searchFactory.getConnection();
|
username = connection.search(baseDN, SearchScope.WHOLE_SUBTREE,
|
filter);
|
}
|
catch (final DirectoryException e)
|
{
|
switch (e.getResultCode())
|
{
|
case NO_SUCH_OBJECT:
|
case CLIENT_SIDE_NO_RESULTS_RETURNED:
|
// Ignore and try next base DN.
|
break;
|
case CLIENT_SIDE_MORE_RESULTS_TO_RETURN:
|
// More than one matching entry was returned.
|
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPED_SEARCH_TOO_MANY_CANDIDATES.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()),
|
String.valueOf(baseDN), String.valueOf(filter)));
|
default:
|
// We don't want to propagate this internal error to the
|
// client. We should log it and map it to a more appropriate
|
// error.
|
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPED_SEARCH_FAILED.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()),
|
e.getMessageObject()), e);
|
}
|
}
|
finally
|
{
|
if (connection != null)
|
{
|
connection.close();
|
}
|
}
|
}
|
|
if (username == null)
|
{
|
/*
|
* No matching entries were found in the remote directory.
|
*/
|
throw new DirectoryException(ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPED_SEARCH_NO_CANDIDATES.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()),
|
String.valueOf(filter)));
|
}
|
|
break;
|
}
|
|
// Now perform the bind.
|
Connection connection = null;
|
try
|
{
|
connection = bindFactory.getConnection();
|
connection.simpleBind(username, password);
|
return true;
|
}
|
catch (final DirectoryException e)
|
{
|
switch (e.getResultCode())
|
{
|
case NO_SUCH_OBJECT:
|
case INVALID_CREDENTIALS:
|
return false;
|
default:
|
// We don't want to propagate this internal error to the
|
// client. We should log it and map it to a more appropriate
|
// error.
|
throw new DirectoryException(
|
ResultCode.INVALID_CREDENTIALS,
|
ERR_LDAP_PTA_MAPPED_BIND_FAILED.get(
|
String.valueOf(userEntry.getDN()),
|
String.valueOf(configuration.dn()), e.getMessageObject()),
|
e);
|
}
|
}
|
finally
|
{
|
if (connection != null)
|
{
|
connection.close();
|
}
|
}
|
}
|
finally
|
{
|
sharedLock.unlock();
|
}
|
}
|
}
|
|
|
|
// Guards against configuration changes.
|
private final ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
|
private final ReadLock sharedLock = lock.readLock();
|
private final WriteLock exclusiveLock = lock.writeLock();
|
|
// Current configuration.
|
private LDAPPassThroughAuthenticationPolicyCfg configuration;
|
|
private FailoverConnectionFactory searchFactory = null;
|
private FailoverConnectionFactory bindFactory = null;
|
|
|
|
private PolicyImpl(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration)
|
{
|
initializeConfiguration(configuration);
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public ConfigChangeResult applyConfigurationChange(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration)
|
{
|
exclusiveLock.lock();
|
try
|
{
|
closeConnections();
|
initializeConfiguration(configuration);
|
}
|
finally
|
{
|
exclusiveLock.unlock();
|
}
|
return new ConfigChangeResult(ResultCode.SUCCESS, false);
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public AuthenticationPolicyState createAuthenticationPolicyState(
|
final Entry userEntry, final long time) throws DirectoryException
|
{
|
// The current time is not needed for LDAP PTA.
|
return new StateImpl(userEntry);
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public void finalizeAuthenticationPolicy()
|
{
|
exclusiveLock.lock();
|
try
|
{
|
configuration.removeLDAPPassThroughChangeListener(this);
|
closeConnections();
|
}
|
finally
|
{
|
exclusiveLock.unlock();
|
}
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public DN getDN()
|
{
|
return configuration.dn();
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public boolean isConfigurationChangeAcceptable(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration,
|
final List<Message> unacceptableReasons)
|
{
|
// The configuration is always valid.
|
return true;
|
}
|
|
|
|
private void closeConnections()
|
{
|
exclusiveLock.lock();
|
try
|
{
|
if (searchFactory != null)
|
{
|
searchFactory.close();
|
searchFactory = null;
|
}
|
|
if (bindFactory != null)
|
{
|
bindFactory.close();
|
bindFactory = null;
|
}
|
|
}
|
finally
|
{
|
exclusiveLock.unlock();
|
}
|
}
|
|
|
|
private void initializeConfiguration(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration)
|
{
|
this.configuration = configuration;
|
|
// Create load-balancers for primary servers.
|
final LoadBalancer primarySearchLoadBalancer;
|
final LoadBalancer primaryBindLoadBalancer;
|
|
Set<String> servers = configuration.getPrimaryRemoteLDAPServer();
|
ConnectionPool[] searchPool = new ConnectionPool[servers.size()];
|
ConnectionPool[] bindPool = new ConnectionPool[servers.size()];
|
int index = 0;
|
for (final String hostPort : servers)
|
{
|
final ConnectionFactory factory = newLDAPConnectionFactory(hostPort);
|
searchPool[index] = new ConnectionPool(
|
new AuthenticatedConnectionFactory(factory));
|
bindPool[index++] = new ConnectionPool(factory);
|
}
|
primarySearchLoadBalancer = new LoadBalancer(searchPool);
|
primaryBindLoadBalancer = new LoadBalancer(bindPool);
|
|
// Create load-balancers for secondary servers.
|
final LoadBalancer secondarySearchLoadBalancer;
|
final LoadBalancer secondaryBindLoadBalancer;
|
|
servers = configuration.getSecondaryRemoteLDAPServer();
|
if (servers.isEmpty())
|
{
|
secondarySearchLoadBalancer = null;
|
secondaryBindLoadBalancer = null;
|
}
|
else
|
{
|
searchPool = new ConnectionPool[servers.size()];
|
bindPool = new ConnectionPool[servers.size()];
|
index = 0;
|
for (final String hostPort : servers)
|
{
|
final ConnectionFactory factory = newLDAPConnectionFactory(hostPort);
|
searchPool[index] = new ConnectionPool(
|
new AuthenticatedConnectionFactory(factory));
|
bindPool[index++] = new ConnectionPool(factory);
|
}
|
secondarySearchLoadBalancer = new LoadBalancer(searchPool);
|
secondaryBindLoadBalancer = new LoadBalancer(bindPool);
|
}
|
|
searchFactory = new FailoverConnectionFactory(primarySearchLoadBalancer,
|
secondarySearchLoadBalancer);
|
bindFactory = new FailoverConnectionFactory(primaryBindLoadBalancer,
|
secondaryBindLoadBalancer);
|
}
|
|
|
|
private ConnectionFactory newLDAPConnectionFactory(final String hostPort)
|
{
|
// Validation already performed by admin framework.
|
final int colonIndex = hostPort.lastIndexOf(":");
|
final String hostname = hostPort.substring(0, colonIndex);
|
final int port = Integer.parseInt(hostPort.substring(colonIndex + 1));
|
return provider.getLDAPConnectionFactory(hostname, port, configuration);
|
}
|
|
}
|
|
|
|
// Debug tracer for this class.
|
private static final DebugTracer TRACER = DebugLogger.getTracer();
|
|
/**
|
* Attribute list for searches requesting no attributes.
|
*/
|
static final LinkedHashSet<String> NO_ATTRIBUTES;
|
|
static
|
{
|
NO_ATTRIBUTES = new LinkedHashSet<String>(1);
|
NO_ATTRIBUTES.add("1.1");
|
}
|
|
// The provider which should be used by policies to create LDAP connections.
|
private final LDAPConnectionFactoryProvider provider;
|
|
/**
|
* The default LDAP connection factory provider.
|
*/
|
private static final LDAPConnectionFactoryProvider DEFAULT_PROVIDER =
|
new LDAPConnectionFactoryProvider()
|
{
|
|
@Override
|
public ConnectionFactory getLDAPConnectionFactory(final String host,
|
final int port, final LDAPPassThroughAuthenticationPolicyCfg options)
|
{
|
return new LDAPConnectionFactory(host, port, options);
|
}
|
|
};
|
|
|
|
/**
|
* Determines whether or no a result code is expected to trigger the
|
* associated connection to be closed immediately.
|
*
|
* @param resultCode
|
* The result code.
|
* @return {@code true} if the result code is expected to trigger the
|
* associated connection to be closed immediately.
|
*/
|
static boolean isFatalResultCode(final ResultCode resultCode)
|
{
|
switch (resultCode)
|
{
|
case BUSY:
|
case UNAVAILABLE:
|
case PROTOCOL_ERROR:
|
case OTHER:
|
case UNWILLING_TO_PERFORM:
|
case OPERATIONS_ERROR:
|
case TIME_LIMIT_EXCEEDED:
|
case CLIENT_SIDE_CONNECT_ERROR:
|
case CLIENT_SIDE_DECODING_ERROR:
|
case CLIENT_SIDE_ENCODING_ERROR:
|
case CLIENT_SIDE_LOCAL_ERROR:
|
case CLIENT_SIDE_SERVER_DOWN:
|
case CLIENT_SIDE_TIMEOUT:
|
return true;
|
default:
|
return false;
|
}
|
}
|
|
|
|
/**
|
* Public default constructor used by the admin framework. This will use the
|
* default LDAP connection factory provider.
|
*/
|
public LDAPPassThroughAuthenticationPolicyFactory()
|
{
|
this(DEFAULT_PROVIDER);
|
}
|
|
|
|
/**
|
* Package private constructor allowing unit tests to provide mock connection
|
* implementations.
|
*
|
* @param provider
|
* The LDAP connection factory provider implementation which LDAP PTA
|
* authentication policies will use.
|
*/
|
LDAPPassThroughAuthenticationPolicyFactory(
|
final LDAPConnectionFactoryProvider provider)
|
{
|
this.provider = provider;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public AuthenticationPolicy createAuthenticationPolicy(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration)
|
throws ConfigException, InitializationException
|
{
|
final PolicyImpl policy = new PolicyImpl(configuration);
|
configuration.addLDAPPassThroughChangeListener(policy);
|
return policy;
|
}
|
|
|
|
/**
|
* {@inheritDoc}
|
*/
|
@Override
|
public boolean isConfigurationAcceptable(
|
final LDAPPassThroughAuthenticationPolicyCfg configuration,
|
final List<Message> unacceptableReasons)
|
{
|
// The configuration is always valid.
|
return true;
|
}
|
|
}
|
