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package org.openslx.imagemaster.ftp;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import org.apache.ftpserver.FtpServer;
import org.apache.ftpserver.FtpServerFactory;
import org.apache.ftpserver.ftplet.Authority;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.Ftplet;
import org.apache.ftpserver.ftplet.UserManager;
import org.apache.ftpserver.impl.FtpIoSession;
import org.apache.ftpserver.listener.Listener;
import org.apache.ftpserver.listener.ListenerFactory;
import org.apache.ftpserver.ssl.SslConfigurationFactory;
import org.apache.ftpserver.usermanager.PropertiesUserManagerFactory;
import org.apache.ftpserver.usermanager.SaltedPasswordEncryptor;
import org.apache.ftpserver.usermanager.impl.BaseUser;
import org.apache.ftpserver.usermanager.impl.WritePermission;
import org.apache.log4j.Logger;
import org.openslx.imagemaster.Globals;
import org.openslx.imagemaster.Globals.PropString;
import org.openslx.imagemaster.thrift.iface.FtpCredentials;
import org.openslx.imagemaster.util.RandomString;
import org.openslx.imagemaster.util.Util;
public class MasterFtpServer implements Runnable
{
private static Logger log = Logger.getLogger( MasterFtpServer.class );
private FtpServer server;
private UserManager userManager;
private Listener listener;
// key: ftpUsername, value: infos
public final HashMap<String, Infos> users = new HashMap<>();
private boolean ini = false;
public enum Mode
{
UPLOADING, DOWNLOADING
}
/**
* Class to hold infos of a ftp user.
*
* @author nils
*
*/
public class Infos
{
private final Long createTime;
private final Mode mode;
private final String fileName;
public Infos(Long createTime, Mode mode, String fileName)
{
this.createTime = createTime;
this.mode = mode;
this.fileName = fileName;
}
public Long getCreateTime()
{
return this.createTime;
}
public Mode getMode()
{
return this.mode;
}
public String getFileName()
{
return this.fileName;
}
}
public void init( int port )
{
if ( ini )
return;
FtpServerFactory serverFactory = new FtpServerFactory();
ListenerFactory factory = new ListenerFactory();
// config ssl
SslConfigurationFactory sslConfigFactory = new SslConfigurationFactory();
sslConfigFactory.setKeystoreFile( new File( Globals.getPropertyString( PropString.FTPKEYSTOREFILE ) ) );
sslConfigFactory.setKeyAlias( Globals.getPropertyString( PropString.FTPKEYSTOREALIAS ) );
sslConfigFactory.setKeystorePassword( Globals.getPropertyString( PropString.FTPKEYSTOREPASSWORD ) );
// set the port of the listener
factory.setPort( port );
factory.setSslConfiguration( sslConfigFactory.createSslConfiguration() );
factory.setImplicitSsl( true );
// replace the default listener
listener = factory.createListener();
serverFactory.addListener( "default", listener );
// create user manager
PropertiesUserManagerFactory userManagerFactory = new PropertiesUserManagerFactory();
File userFile = new File( "ftp.properties" );
userManagerFactory.setFile( userFile );
userManagerFactory.setPasswordEncryptor( new SaltedPasswordEncryptor() );
userManager = userManagerFactory.createUserManager();
serverFactory.setUserManager( userManager );
// add the Ftplet
HashMap<String, Ftplet> map = new HashMap<String, Ftplet>();
map.put( "Ftplet1", new MasterFtplet() );
serverFactory.setFtplets( map );
// start the server
server = serverFactory.createServer();
ini = true;
}
/**
* Add a user with username and password.
* @param username
* @param password
* @param mode
* @param fileName the filename of the file, that is allowed to access (if downloading)
* @return
*/
public boolean addUser( String username, String password, Mode mode, String fileName)
{
String dir = Globals.getPropertyString( Globals.PropString.FTPBASEDIR ) + "/" + username + "/";
BaseUser user = new BaseUser();
user.setName( username );
user.setPassword( password );
List<Authority> authorities = new ArrayList<Authority>();
String file = "";
if (mode == Mode.UPLOADING) {
user.setHomeDirectory( dir );
// uploading satellite is allowed to write
authorities.add( new WritePermission() );
} else if (mode == Mode.DOWNLOADING) {
// the downloading satellite may access the whole dir, but this is restricted in MasterFtplet
user.setHomeDirectory( Globals.getPropertyString( Globals.PropString.FTPBASEDIR ) );
// downloading satellite is only allowed to read
file = fileName;
}
user.setAuthorities( authorities );
try {
userManager.save( user );
synchronized ( users ) {
users.put( username, new Infos( System.currentTimeMillis(), mode, file) );
}
} catch ( FtpException e ) {
return false;
}
return true;
}
public FtpCredentials addUser( final String serverSessionId, Mode mode, String fileName )
{
FtpCredentials ftpCredentials = null;
String generatedUser = RandomString.generate( 10, false );
String generatedPass = RandomString.generate( 16, true );
String dir = Globals.getPropertyString( Globals.PropString.FTPBASEDIR ) + "/"
+ generatedUser + "/";
BaseUser user = new BaseUser();
user.setName( generatedUser );
user.setPassword( generatedPass );
List<Authority> authorities = new ArrayList<Authority>();
String file = "";
if (mode == Mode.UPLOADING) {
// uploading satellite needs a folder
if ( !new File( dir ).mkdir() ) {
return null;
}
user.setHomeDirectory( dir );
// uploading satellite is allowed to write
authorities.add( new WritePermission() );
} else if (mode == Mode.DOWNLOADING) {
// the downloading satellite may access the whole dir, but this is restricted in MasterFtplet
user.setHomeDirectory( Globals.getPropertyString( Globals.PropString.FTPBASEDIR ) );
// downloading satellite is only allowed to read
file = fileName;
}
user.setAuthorities( authorities );
try {
userManager.save( user );
ftpCredentials = new FtpCredentials( generatedUser, generatedPass );
synchronized ( users ) {
users.put( ftpCredentials.username, new Infos( System.currentTimeMillis(), mode, file) );
}
} catch ( FtpException e ) {
// TODO: handle this
}
log.info( "Generated user/pass: " + generatedUser + "\t"
+ generatedPass + "\n with home dir: " + dir );
return ftpCredentials;
}
public boolean removeUser( final String username )
{
if ( !users.containsKey( username ) )
return false;
try {
// first find active session and close it
Iterator<FtpIoSession> iter = listener.getActiveSessions().iterator();
while ( iter.hasNext() ) {
FtpIoSession session = (FtpIoSession)iter.next();
if ( session.getUser() == null )
continue;
if ( session.getUser().getName() == username ) {
session.close();
}
}
// afterwards delete user
userManager.delete( username );
// remove user from map (cache)
synchronized ( users ) {
users.remove( username );
}
// remove his home dir
File dir = new File( Globals.getPropertyString( Globals.PropString.FTPBASEDIR ) + "/" + username );
Util.deleteFolder( dir );
return true;
} catch ( FtpException e ) {
return false;
}
}
@Override
public void run()
{
try {
//if (!ini) throw new Exception("FTP server needs to be initalized.");
log.info( "Starting FTP Sever" );
server.start();
} catch ( FtpException e1 ) {
e1.printStackTrace();
}
}
}
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