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Milton Community Edition: Supports DAV level 1 and is available on Apache2 license
/*
*
* Copyright 2014 McEvoy Software Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.milton.ldap;
import io.milton.http.webdav.PropFindPropertyBuilder;
import io.milton.http.webdav.WebDavProtocol;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.net.Inet4Address;
import java.net.ServerSocket;
import java.net.Socket;
import java.security.GeneralSecurityException;
import java.security.KeyStore;
import javax.net.ServerSocketFactory;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* LDAP server, handle LDAP directory requests.
*/
public class LdapServer extends Thread {
private static final Logger log = LoggerFactory.getLogger(LdapServer.class);
/**
* Default LDAP port
*/
public static final int DEFAULT_PORT = 389;
private final UserFactory userSessionFactory;
private final SearchManager searchManager;
private final LdapTransactionManager txManager;
private final PropFindPropertyBuilder propFindPropertyBuilder;
protected boolean nosslFlag;
private int port;
private String bindAddress;
private boolean allowRemote = true;
private File keystoreFile;
private String keystoreType;
private String keystorePass;
private ServerSocket serverSocket;
/**
* Create a ServerSocket to listen for connections. Start the thread.
*
* @param port pop listen port, 389 if not defined (0)
*/
public LdapServer(LdapTransactionManager txManager, UserFactory userSessionFactory, int port, boolean nosslFlag, String bindAddress, PropFindPropertyBuilder propFindPropertyBuilder) {
super(LdapServer.class.getName());
this.txManager = txManager;
searchManager = new SearchManager(txManager);
setDaemon(true);
if (port == 0) {
this.port = LdapServer.DEFAULT_PORT;
} else {
this.port = port;
}
this.bindAddress = bindAddress;
this.userSessionFactory = userSessionFactory;
this.nosslFlag = nosslFlag;
this.propFindPropertyBuilder = propFindPropertyBuilder;
}
public LdapServer(LdapTransactionManager txManager, UserFactory userSessionFactory, PropFindPropertyBuilder propFindPropertyBuilder) {
super(LdapServer.class.getName());
this.txManager = txManager;
searchManager = new SearchManager(txManager);
setDaemon(true);
this.userSessionFactory = userSessionFactory;
this.propFindPropertyBuilder = propFindPropertyBuilder;
this.port = LdapServer.DEFAULT_PORT;
}
/**
* This constructor is for convenience. It uses the list of property sources
* from the WebDavProtocol object, freeing the developer from the need to
* publicly declare property sources when only the built in ones are used.
*
* @param userSessionFactory
* @param webDavProtocol
*/
public LdapServer(LdapTransactionManager txManager, UserFactory userSessionFactory, WebDavProtocol webDavProtocol, PropFindPropertyBuilder propFindPropertyBuilder) {
super(LdapServer.class.getName());
this.txManager = txManager;
searchManager = new SearchManager(txManager);
setDaemon(true);
this.userSessionFactory = userSessionFactory;
this.port = LdapServer.DEFAULT_PORT;
this.propFindPropertyBuilder = propFindPropertyBuilder;
}
public boolean isNosslFlag() {
return nosslFlag;
}
public void setNosslFlag(boolean nosslFlag) {
this.nosslFlag = nosslFlag;
}
public String getBindAddress() {
return bindAddress;
}
public void setBindAddress(String bindAddress) {
this.bindAddress = bindAddress;
}
public void setPort(int port) {
this.port = port;
}
public String getProtocolName() {
return "LDAP";
}
public LdapConnection createConnectionHandler(Socket clientSocket) {
return new LdapConnection(clientSocket, userSessionFactory, searchManager, txManager, propFindPropertyBuilder);
}
@Override
public synchronized void start() {
try {
log.info("Created server, binding to address. bind address: " + bindAddress + " port: " + port);
bind();
} catch (Exception ex) {
throw new RuntimeException(ex);
}
log.info("Starting the LDAP server thread");
super.start();
}
/**
* Bind server socket on defined port.
*
* @throws DavMailException unable to create server socket
*/
public void bind() throws Exception {
ServerSocketFactory serverSocketFactory;
if (keystoreFile == null || keystoreFile.length() == 0 || nosslFlag) {
serverSocketFactory = ServerSocketFactory.getDefault();
} else {
FileInputStream keyStoreInputStream = null;
try {
keyStoreInputStream = new FileInputStream(keystoreFile);
// keystore for keys and certificates
// keystore and private keys should be password protected...
KeyStore keystore = KeyStore.getInstance(keystoreType);
keystore.load(keyStoreInputStream, keystorePass.toCharArray());
// KeyManagerFactory to create key managers
KeyManagerFactory kmf = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm());
// initialize KMF to work with keystore
kmf.init(keystore, keystorePass.toCharArray());
// SSLContext is environment for implementing JSSE...
// create ServerSocketFactory
SSLContext sslContext = SSLContext.getInstance("SSLv3");
// initialize sslContext to work with key managers
sslContext.init(kmf.getKeyManagers(), null, null);
// create ServerSocketFactory from sslContext
serverSocketFactory = sslContext.getServerSocketFactory();
} catch (IOException | GeneralSecurityException ex) {
throw new Exception(ex);
} finally {
if (keyStoreInputStream != null) {
try {
keyStoreInputStream.close();
} catch (IOException exc) {
log.error("exception closing stream", exc);
}
}
}
}
try {
// create the server socket
if (bindAddress == null || bindAddress.length() == 0) {
log.info("Starting LDAP server on all interfaces and port: " + port);
serverSocket = serverSocketFactory.createServerSocket(port);
} else {
log.info("Starting LDAP server on interface: " + bindAddress + " and port: " + port);
serverSocket = serverSocketFactory.createServerSocket(port, 0, Inet4Address.getByName(bindAddress));
}
} catch (IOException e) {
throw new Exception(e);
}
}
/**
* The body of the server thread. Loop forever, listening for and accepting
* connections from clients. For each connection, create a Connection object
* to handle communication through the new Socket.
*/
@Override
public void run() {
Socket clientSocket = null;
LdapConnection connection = null;
try {
//noinspection InfiniteLoopStatement
while (true) {
System.out.println("Waiting for connection...");
clientSocket = serverSocket.accept();
System.out.println("Accepted socket from: " + clientSocket.getRemoteSocketAddress());
// set default timeout to 5 minutes
clientSocket.setSoTimeout(300000);
log.info("CONNECTION_FROM" + clientSocket.getInetAddress() + port);
// only accept localhost connections for security reasons
if (allowRemote || clientSocket.getInetAddress().isLoopbackAddress()) {
connection = createConnectionHandler(clientSocket);
connection.start();
} else {
clientSocket.close();
log.warn("external connection refused");
}
}
} catch (IOException e) {
// do not warn if exception on socket close (gateway restart)
if (!serverSocket.isClosed()) {
log.warn("exception", e);
}
} finally {
try {
if (clientSocket != null) {
clientSocket.close();
}
} catch (IOException e) {
log.warn("exception", e);
}
if (connection != null) {
connection.close();
}
}
System.out.println("LDAP Server has exited");
}
/**
* Close server socket
*/
public void close() {
try {
if (serverSocket != null) {
serverSocket.close();
}
} catch (IOException e) {
log.error("LOG_EXCEPTION_CLOSING_SERVER_SOCKET", e);
}
}
/**
* Server socket TCP port
*
* @return port
*/
public int getPort() {
return port;
}
public String getKeystorePass() {
return keystorePass;
}
public void setKeystorePass(String keystorePass) {
this.keystorePass = keystorePass;
}
public String getKeystoreType() {
return keystoreType;
}
public void setKeystoreType(String keystoreType) {
this.keystoreType = keystoreType;
}
public File getKeystoreFile() {
return keystoreFile;
}
public void setKeystoreFile(File keystoreFile) {
this.keystoreFile = keystoreFile;
}
public boolean isAllowRemote() {
return allowRemote;
}
public void setAllowRemote(boolean allowRemote) {
this.allowRemote = allowRemote;
}
}