package org.jboss.resteasy.security.smime;
import org.bouncycastle.cms.CMSException;
import org.bouncycastle.cms.CMSProcessable;
import org.bouncycastle.cms.CMSProcessableByteArray;
import org.bouncycastle.cms.CMSSignedData;
import org.bouncycastle.cms.CMSSignedDataGenerator;
import org.jboss.resteasy.security.BouncyIntegration;
import org.jboss.resteasy.specimpl.MultivaluedMapImpl;
import org.jboss.resteasy.spi.WriterException;
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.security.NoSuchAlgorithmException;
import java.security.NoSuchProviderException;
import java.security.cert.X509Certificate;
/**
* @author <a href="mailto:bill@burkecentral.com">Bill Burke</a>
* @version $Revision: 1 $
*/
@Provider
@Produces("application/pkcs7-signature")
public class PKCS7SignatureWriter implements MessageBodyWriter<SignedOutput>
{
static
{
BouncyIntegration.init();
}
@Context
protected Providers providers;
@Override
public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return SignedOutput.class.isAssignableFrom(type);
}
@Override
public long getSize(SignedOutput smimeOutput, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType)
{
return -1;
}
@Override
public void writeTo(SignedOutput out, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> headers, OutputStream os) throws IOException, WebApplicationException
{
try
{
byte[] encoded = sign(providers, out);
headers.putSingle("Content-Type", "application/pkcs7-signature;micalg=\"sha1\"");
os.write(encoded);
}
catch (Exception e)
{
throw new WriterException(e);
}
}
public static byte[] sign(Providers providers, SignedOutput out) throws IOException, NoSuchAlgorithmException, NoSuchProviderException, CMSException
{
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);
CMSSignedDataGenerator signGen = new CMSSignedDataGenerator();
signGen.addSigner(out.getPrivateKey(), (X509Certificate)out.getCertificate(), CMSSignedDataGenerator.DIGEST_SHA1);
//signGen.addCertificatesAndCRLs(certs);
CMSProcessable content = new CMSProcessableByteArray(bodyOs.toByteArray());
CMSSignedData signedData = signGen.generate(content, true, "BC");
return signedData.getEncoded();
}
}