/*
* @(#)SenderServerValidationScanner.java 30/10/2004
*
* Copyright (c) 2004, 2005 jASEN.org
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the distribution.
*
* 3. The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* 4. Any modification or additions to the software must be contributed back
* to the project.
*
* 5. Any investigation or reverse engineering of source code or binary to
* enable emails to bypass the filters, and hence inflict spam and or viruses
* onto users who use or do not use jASEN could subject the perpetrator to
* criminal and or civil liability.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JASEN.ORG,
* OR ANY CONTRIBUTORS TO THIS SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
package org.jasen.plugins;
import java.net.UnknownHostException;
import java.util.Properties;
import javax.mail.MessagingException;
import javax.mail.internet.AddressException;
import javax.mail.internet.MimeMessage;
import org.jasen.core.ProbabilityTestResult;
import org.jasen.core.engine.Jasen;
import org.jasen.error.DNSException;
import org.jasen.error.JasenException;
import org.jasen.interfaces.JasenMessage;
import org.jasen.interfaces.JasenPlugin;
import org.jasen.interfaces.JasenTestResult;
import org.jasen.interfaces.ParserData;
import org.jasen.interfaces.ReceivedHeaderParser;
import org.jasen.util.MimeUtils;
/**
* <P>
* Validates the integrity of the sender domain based on the MX records for that domain.
* </P>
* <P>
* Because this test will almost always fail, it is used to make messages "whiter" not blacker
* </P>
* @author Jason Polites
*/
public class SenderServerValidationScanner implements JasenPlugin
{
private float highProb = 0.9f;
private float lowProb = 0.1f;
private float medProb = 0.5f;
/**
*
*/
public SenderServerValidationScanner() {
super ();
}
/*
* (non-Javadoc)
* @see org.jasen.interfaces.JasenPlugin#test(org.jasen.core.Jasen, javax.mail.internet.MimeMessage, org.jasen.interfaces.JasenMessage, org.jasen.interfaces.ParserData, org.jasen.interfaces.ReceivedHeaderParser)
*/
public JasenTestResult test(Jasen engine, MimeMessage rawMessage, JasenMessage parsedMessage, ParserData data, ReceivedHeaderParser parser) throws JasenException {
ProbabilityTestResult result = new ProbabilityTestResult();
try
{
// Get the From address
String address = null;
try
{
address = MimeUtils.toInternetAddress(rawMessage.getFrom()[0], false).getAddress();
}
catch (AddressException e)
{
// Ignore, this will be handled below
}
if(address == null || !MimeUtils.isValidAddress(address)) {
// Use the actual sender
address = parsedMessage.getEnvelopeSender();
}
// Get the first header line
String header = rawMessage.getHeader("Received")[0];
try
{
if(MimeUtils.verifySenderAddress(engine.getDnsResolver(), engine.getInetAddressResolver(), parser, header, address)) {
result.setProbability(lowProb);
}
else
{
result.setProbability(highProb);
}
}
catch (UnknownHostException e)
{
// No host... set to high
result.setProbability(highProb);
}
catch (DNSException e)
{
// Error during DNS lookup?
result.setProbability(medProb);
}
}
catch (AddressException e)
{
throw new JasenException(e);
}
catch (MessagingException e)
{
throw new JasenException(e);
}
return result;
}
public void init(Properties properties) throws JasenException {
if(properties != null) {
String strHi = properties.getProperty ("high-prob");
String strLo = properties.getProperty ("low-prob");
String strMed = properties.getProperty ("med-prob");
if (strHi != null)
highProb = Float.parseFloat (strHi);
if (strLo != null)
lowProb = Float.parseFloat (strLo);
if (strMed != null)
medProb = Float.parseFloat (strMed);
}
}
/*
* (non-Javadoc)
* @see org.jasen.interfaces.JasenPlugin#destroy()
*/
public void destroy() throws JasenException {}
}