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/**
* The FreeBSD Copyright
* Copyright 1994-2008 The FreeBSD Project. All rights reserved.
* Copyright (C) 2013-2020 Philip Helger philip[at]helger[dot]com
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY
* EXPRESS 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 THE FREEBSD PROJECT OR
* CONTRIBUTORS 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.
*
* The views and conclusions contained in the software and documentation
* are those of the authors and should not be interpreted as representing
* official policies, either expressed or implied, of the FreeBSD Project.
*/
package com.helger.as2lib.client;
import java.net.Proxy;
import java.security.cert.X509Certificate;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.annotation.OverridingMethodsMustInvokeSuper;
import javax.mail.MessagingException;
import javax.mail.internet.MimeBodyPart;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.helger.as2lib.cert.AS2CertificateExistsException;
import com.helger.as2lib.cert.CertificateFactory;
import com.helger.as2lib.exception.AS2Exception;
import com.helger.as2lib.message.AS2Message;
import com.helger.as2lib.message.IMessage;
import com.helger.as2lib.partner.CPartnershipIDs;
import com.helger.as2lib.partner.Partnership;
import com.helger.as2lib.partner.SelfFillingPartnershipFactory;
import com.helger.as2lib.processor.DefaultMessageProcessor;
import com.helger.as2lib.processor.IMessageProcessor;
import com.helger.as2lib.processor.resender.IProcessorResenderModule;
import com.helger.as2lib.processor.resender.ImmediateResenderModule;
import com.helger.as2lib.processor.sender.AS2SenderModule;
import com.helger.as2lib.processor.sender.IProcessorSenderModule;
import com.helger.as2lib.session.AS2Session;
import com.helger.commons.ValueEnforcer;
import com.helger.commons.annotation.OverrideOnDemand;
import com.helger.commons.collection.attr.StringMap;
import com.helger.commons.collection.impl.CommonsHashMap;
import com.helger.commons.collection.impl.ICommonsMap;
import com.helger.commons.factory.FactoryNewInstance;
import com.helger.commons.functional.ISupplier;
import com.helger.commons.io.stream.NonBlockingByteArrayInputStream;
import com.helger.commons.timing.StopWatch;
import com.helger.security.certificate.CertificateHelper;
/**
* A simple client that allows for sending AS2 Messages and retrieving of
* synchronous MDNs.
*
* @author Philip Helger
*/
public class AS2Client
{
private static final Logger LOGGER = LoggerFactory.getLogger (AS2Client.class);
private ISupplier m_aAS2SenderModuleFactory = FactoryNewInstance.create (AS2SenderModule.class,
true);
// proxy is not serializable
private Proxy m_aHttpProxy;
public AS2Client ()
{}
/**
* Set the factory to create {@link AS2SenderModule} objects internally. By
* default a new instance of {@link AS2SenderModule} is created so you don't
* need to call this method.
*
* @param aAS2SenderModuleFactory
* The factory to be used. May not be null.
* @return this for chaining
*/
@Nonnull
public AS2Client setAS2SenderModuleFactory (@Nonnull final ISupplier aAS2SenderModuleFactory)
{
m_aAS2SenderModuleFactory = ValueEnforcer.notNull (aAS2SenderModuleFactory, "AS2SenderModuleFactory");
return this;
}
/**
* @return The current HTTP proxy used. Defaults to null.
*/
@Nullable
public Proxy getHttpProxy ()
{
return m_aHttpProxy;
}
/**
* Set the proxy server for transmission.
*
* @param aHttpProxy
* The proxy to use. May be null to indicate no proxy.
* @return this for chaining
*/
@Nonnull
public AS2Client setHttpProxy (@Nullable final Proxy aHttpProxy)
{
m_aHttpProxy = aHttpProxy;
return this;
}
/**
* Create a new {@link Partnership} object that is later used for message
* creation. If you override this method, please ensure to call this class'
* version of the method first.
*
* @param aSettings
* The current client settings. Never null.
* @return Non-null Partnership.
*/
@Nonnull
@OverrideOnDemand
@OverridingMethodsMustInvokeSuper
protected Partnership buildPartnership (@Nonnull final AS2ClientSettings aSettings)
{
final Partnership aPartnership = new Partnership (aSettings.getPartnershipName ());
aPartnership.setSenderAS2ID (aSettings.getSenderAS2ID ());
aPartnership.setSenderX509Alias (aSettings.getSenderKeyAlias ());
aPartnership.setSenderEmail (aSettings.getSenderEmailAddress ());
aPartnership.setReceiverAS2ID (aSettings.getReceiverAS2ID ());
aPartnership.setReceiverX509Alias (aSettings.getReceiverKeyAlias ());
aPartnership.setAS2URL (aSettings.getDestinationAS2URL ());
aPartnership.setEncryptAlgorithm (aSettings.getCryptAlgo ());
aPartnership.setSigningAlgorithm (aSettings.getSignAlgo ());
aPartnership.setProtocol (AS2Message.PROTOCOL_AS2);
aPartnership.setMessageIDFormat (aSettings.getMessageIDFormat ());
if (aSettings.isMDNRequested ())
{
// We want an MDN
// This field must be set to a valid email address
aPartnership.setAS2MDNTo (aSettings.getSenderEmailAddress ());
// signed MDN requested?
aPartnership.setAS2MDNOptions (aSettings.getMDNOptions ());
if (aSettings.isAsyncMDNRequested ())
{
// We want an async MDN
aPartnership.setAS2ReceiptDeliveryOption (aSettings.getAsyncMDNUrl ());
}
else
{
// We want an sync MDN
// This field must be null - otherwise async MDN!
aPartnership.setAS2ReceiptDeliveryOption (null);
}
}
else
{
// We don't want an MDN
aPartnership.setAS2MDNTo (null);
aPartnership.setAS2ReceiptDeliveryOption (null);
aPartnership.setAS2MDNOptions (null);
}
if (aSettings.getCompressionType () != null)
{
aPartnership.setCompressionType (aSettings.getCompressionType ());
aPartnership.setCompressionMode (aSettings.isCompressBeforeSigning () ? CPartnershipIDs.COMPRESS_BEFORE_SIGNING
: CPartnershipIDs.COMPRESS_AFTER_SIGNING);
}
return aPartnership;
}
@Nonnull
@OverrideOnDemand
protected AS2Message createAS2MessageObj ()
{
return new AS2Message ();
}
@Nonnull
@OverrideOnDemand
@OverridingMethodsMustInvokeSuper
protected AS2Message createMessage (@Nonnull final Partnership aPartnership,
@Nonnull final AS2ClientRequest aRequest) throws MessagingException
{
final AS2Message aMsg = createAS2MessageObj ();
aMsg.setContentType (aRequest.getContentType ());
aMsg.setSubject (aRequest.getSubject ());
aMsg.setPartnership (aPartnership);
aMsg.setMessageID (aMsg.generateMessageID ());
aMsg.attrs ().putIn (CPartnershipIDs.PA_AS2_URL, aPartnership.getAS2URL ());
aMsg.attrs ().putIn (CPartnershipIDs.PID_AS2, aPartnership.getReceiverAS2ID ());
aMsg.attrs ().putIn (CPartnershipIDs.PID_EMAIL, aPartnership.getSenderEmail ());
// Build message content
final MimeBodyPart aPart = new MimeBodyPart ();
aRequest.applyDataOntoMimeBodyPart (aPart);
aMsg.setData (aPart);
return aMsg;
}
/**
* @return The certificate factory instance to be used. May not be
* null.
*/
@Nonnull
@OverrideOnDemand
protected CertificateFactory createCertificateFactory ()
{
return new CertificateFactory ();
}
@OverrideOnDemand
protected void initCertificateFactory (@Nonnull final AS2ClientSettings aSettings,
@Nonnull final AS2Session aSession) throws AS2Exception
{
final StringMap aParams = new StringMap ();
// TYPE is the only parameter that must be present in initDynamicComponents
aParams.putIn (CertificateFactory.ATTR_TYPE, aSettings.getKeyStoreType ().getID ());
final CertificateFactory aCertFactory = createCertificateFactory ();
aCertFactory.initDynamicComponent (aSession, aParams);
if (aSettings.getKeyStoreFile () != null)
{
if (LOGGER.isInfoEnabled ())
LOGGER.info ("Loading AS2 client keystore from file " + aSettings.getKeyStoreFile ());
aCertFactory.setFilename (aSettings.getKeyStoreFile ().getAbsolutePath ());
aCertFactory.setPassword (aSettings.getKeyStorePassword ());
aCertFactory.setSaveChangesToFile (aSettings.isSaveKeyStoreChangesToFile ());
aCertFactory.load ();
}
else
if (aSettings.getKeyStoreBytes () != null && aSettings.getKeyStorePassword () != null)
{
if (LOGGER.isInfoEnabled ())
LOGGER.info ("Loading AS2 client keystore from byte array. No changes will be saved.");
aCertFactory.setPassword (aSettings.getKeyStorePassword ());
aCertFactory.setSaveChangesToFile (false);
try (
final NonBlockingByteArrayInputStream aBAIS = new NonBlockingByteArrayInputStream (aSettings.getKeyStoreBytes ()))
{
aCertFactory.load (aBAIS, aSettings.getKeyStorePassword ().toCharArray ());
}
}
else
{
if (LOGGER.isInfoEnabled ())
LOGGER.warn ("No AS2 client keystore data was provided. Signing and encryption/decryption will most likely fail.");
// No file provided - no storage
aCertFactory.setSaveChangesToFile (false);
}
if (aSettings.getReceiverCertificate () != null)
{
// Dynamically add recipient certificate if provided
try
{
aCertFactory.addCertificate (aSettings.getReceiverKeyAlias (), aSettings.getReceiverCertificate (), false);
}
catch (final AS2CertificateExistsException ex)
{
// ignore
}
}
aSession.setCertificateFactory (aCertFactory);
}
@OverrideOnDemand
protected void initPartnershipFactory (@Nonnull final AS2Session aSession) throws AS2Exception
{
// Use a self-filling in-memory partnership factory
final SelfFillingPartnershipFactory aPartnershipFactory = new SelfFillingPartnershipFactory ();
aSession.setPartnershipFactory (aPartnershipFactory);
}
@OverrideOnDemand
protected void initMessageProcessor (@Nonnull final AS2Session aSession) throws AS2Exception
{
final IMessageProcessor aMessageProcessor = new DefaultMessageProcessor ();
aSession.setMessageProcessor (aMessageProcessor);
}
/**
* Create an empty response object that is to be filled.
*
* @return The empty response object and never null.
*/
@Nonnull
@OverrideOnDemand
protected AS2ClientResponse createResponse ()
{
return new AS2ClientResponse ();
}
/**
* Create the AS2 session to be used. This method must ensure an eventually
* needed proxy is set.
*
* @return The new AS2 session and never null.
*/
@Nonnull
@OverrideOnDemand
protected AS2Session createSession ()
{
final AS2Session ret = new AS2Session ();
ret.setHttpProxy (m_aHttpProxy);
return ret;
}
/**
* Callback method that is invoked before the main sending. This may be used
* to customize the message.
*
* @param aSettings
* Client settings. Never null.
* @param aSession
* Current session. Never null.
* @param aMsg
* Current message. Never null.
*/
@OverrideOnDemand
protected void beforeSend (@Nonnull final AS2ClientSettings aSettings,
@Nonnull final AS2Session aSession,
@Nonnull final IMessage aMsg)
{}
/**
* Send the AS2 message synchronously
*
* @param aSettings
* The settings to be used. May not be null.
* @param aRequest
* The request data to be send. May not be null.
* @return The response object. Never null.
*/
@Nonnull
public AS2ClientResponse sendSynchronous (@Nonnull final AS2ClientSettings aSettings,
@Nonnull final AS2ClientRequest aRequest)
{
ValueEnforcer.notNull (aSettings, "ClientSettings");
ValueEnforcer.notNull (aRequest, "ClientRequest");
final AS2ClientResponse aResponse = createResponse ();
IMessage aMsg = null;
final StopWatch aSW = StopWatch.createdStarted ();
try
{
final Partnership aPartnership = buildPartnership (aSettings);
aMsg = createMessage (aPartnership, aRequest);
aResponse.setOriginalMessageID (aMsg.getMessageID ());
if (LOGGER.isDebugEnabled ())
LOGGER.debug ("MessageID to send: " + aMsg.getMessageID ());
final boolean bHasRetries = aSettings.getRetryCount () > 0;
// Start a new session
final AS2Session aSession = createSession ();
initCertificateFactory (aSettings, aSession);
initPartnershipFactory (aSession);
initMessageProcessor (aSession);
if (bHasRetries)
{
// Use synchronous no-delay resender
final IProcessorResenderModule aResender = new ImmediateResenderModule ();
aResender.initDynamicComponent (aSession, null);
aSession.getMessageProcessor ().addModule (aResender);
}
aSession.getMessageProcessor ().startActiveModules ();
try
{
// Invoke callback
beforeSend (aSettings, aSession, aMsg);
// Build options map for "handle"
final ICommonsMap aHandleOptions = new CommonsHashMap <> ();
if (bHasRetries)
aHandleOptions.put (IProcessorResenderModule.OPTION_RETRIES, Integer.toString (aSettings.getRetryCount ()));
// Content-Transfer-Encoding is a partnership property
aPartnership.setContentTransferEncodingSend (aRequest.getContentTransferEncoding ());
aPartnership.setContentTransferEncodingReceive (aRequest.getContentTransferEncoding ());
// And create a sender module that directly sends the message
// The message processor registration is required for the resending
// feature
final AS2SenderModule aSender = m_aAS2SenderModuleFactory.get ();
aSender.initDynamicComponent (aSession, null);
// Set connect and read timeout
aSender.setConnectionTimeoutMilliseconds (aSettings.getConnectTimeoutMS ());
aSender.setReadTimeoutMilliseconds (aSettings.getReadTimeoutMS ());
aSender.setQuoteHeaderValues (aSettings.isQuoteHeaderValues ());
aSender.setHttpOutgoingDumperFactory (aSettings.getHttpOutgoingDumperFactory ());
aSender.setHttpIncomingDumper (aSettings.getHttpIncomingDumper ());
if (aSettings.getMICMatchingHandler () != null)
aSender.setMICMatchingHandler (aSettings.getMICMatchingHandler ());
aSender.setVerificationCertificateConsumer (aSettings.getVerificationCertificateConsumer ());
// Add all custom headers
aMsg.headers ().setAllHeaders (aSettings.customHeaders ());
// Added sender as processor
aSession.getMessageProcessor ().addModule (aSender);
// Main sending
aSender.handle (IProcessorSenderModule.DO_SEND, aMsg, aHandleOptions);
}
finally
{
aSession.getMessageProcessor ().stopActiveModules ();
}
}
catch (final Exception ex)
{
LOGGER.error ("Error sending AS2 message", ex);
aResponse.setException (ex);
}
finally
{
if (aMsg != null && aMsg.getMDN () != null)
{
// May be present, even in case of an exception
aResponse.setMDN (aMsg.getMDN ());
// Remember the certificate that was used to verify the MDN
final String sReceivedCert = aMsg.attrs ().getAsString (AS2Message.ATTRIBUTE_RECEIVED_SIGNATURE_CERTIFICATE);
if (sReceivedCert != null)
{
final X509Certificate aReceivedCert = CertificateHelper.convertStringToCertficateOrNull (sReceivedCert);
aResponse.setMDNVerificationCertificate (aReceivedCert);
}
}
}
if (LOGGER.isDebugEnabled ())
LOGGER.debug ("Response retrieved: " + aResponse.getAsString ());
aResponse.setExecutionDuration (aSW.stopAndGetDuration ());
return aResponse;
}
}
