package org.jboss.resteasy.security.smime;
import org.bouncycastle.cms.CMSAlgorithm;
import org.bouncycastle.cms.CMSEnvelopedDataStreamGenerator;
import org.bouncycastle.cms.jcajce.JceCMSContentEncryptorBuilder;
import org.bouncycastle.cms.jcajce.JceKeyTransRecipientInfoGenerator;
import org.bouncycastle.operator.OutputEncryptor;
import org.jboss.resteasy.security.BouncyIntegration;
import org.jboss.resteasy.specimpl.MultivaluedMapImpl;
import org.jboss.resteasy.spi.WriterException;
import org.jboss.resteasy.util.Base64;
import javax.mail.MessagingException;
import javax.mail.internet.InternetHeaders;
import javax.mail.internet.MimeBodyPart;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;
import javax.ws.rs.ext.Providers;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.List;
import java.util.Map;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@Provider
@Produces("*/*")
public class EnvelopedWriter implements MessageBodyWriter<EnvelopedOutput>
{
static
{
BouncyIntegration.init();
}
@Context
protected Providers providers;
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return EnvelopedOutput.class.isAssignableFrom(type);
}
@Override
public long getSize(EnvelopedOutput smimeOutput, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return -1;
}
@Override
public void writeTo(EnvelopedOutput out, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> headers, OutputStream os) throws IOException, WebApplicationException
{
ByteArrayOutputStream baos = null;
OutputStream encrypted = null;
try
{
headers.putSingle("Content-Disposition", "attachment; filename=\"smime.p7m\"");
headers.putSingle("Content-Type", "application/pkcs7-mime; smime-type=enveloped-data; name=\"smime.p7m\"");
headers.putSingle("Content-Transfer-Encoding", "base64");
OutputEncryptor encryptor = new JceCMSContentEncryptorBuilder(CMSAlgorithm.DES_EDE3_CBC)
.setProvider("BC")
.build();
if (out.getCertificate() == null) throw new NullPointerException("The certificate object was not set.");
JceKeyTransRecipientInfoGenerator infoGenerator = new JceKeyTransRecipientInfoGenerator(out.getCertificate());
infoGenerator.setProvider("BC");
CMSEnvelopedDataStreamGenerator generator = new CMSEnvelopedDataStreamGenerator();
generator.addRecipientInfoGenerator(infoGenerator);
MimeBodyPart _msg = createBodyPart(providers, out);
baos = new ByteArrayOutputStream();
encrypted = generator.open(baos, encryptor);
_msg.writeTo(encrypted);
encrypted.close();
byte[] bytes = baos.toByteArray();
String str = Base64.encodeBytes(bytes, Base64.DO_BREAK_LINES);
os.write(str.getBytes());
}
catch (Exception e)
{
throw new WriterException(e);
}
}
public static MimeBodyPart createBodyPart(Providers providers, SMIMEOutput out) throws IOException, MessagingException
{
ByteArrayOutputStream bodyOs = new ByteArrayOutputStream();
MessageBodyWriter writer = providers.getMessageBodyWriter(out.getType(), out.getGenericType(), null, out.getMediaType());
if (writer == null)
{
throw new WriterException("Failed to find writer for type: " + out.getType().getName());
}
MultivaluedMapImpl<String, Object> bodyHeaders = new MultivaluedMapImpl<String, Object>();
bodyHeaders.add("Content-Type", out.getMediaType().toString());
writer.writeTo(out.getEntity(), out.getType(), out.getGenericType(), null, out.getMediaType(), bodyHeaders, bodyOs);
InternetHeaders ih = new InternetHeaders();
for (Map.Entry<String, List<Object>> entry : bodyHeaders.entrySet())
{
for (Object value : entry.getValue())
{
ih.addHeader(entry.getKey(), value.toString());
}
}
return new MimeBodyPart(ih, bodyOs.toByteArray());
}
}