org.jscep.content.CaCertificateContentHandler.java Source code

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Here is the source code for org.jscep.content.CaCertificateContentHandler.java

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/*
 * Copyright (c) 2009-2010 David Grant
 * Copyright (c) 2010 ThruPoint Ltd
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package org.jscep.content;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.security.cert.CertSelector;
import java.security.cert.CertStore;
import java.security.cert.CertStoreException;
import java.security.cert.CertificateException;
import java.security.cert.CertificateFactory;
import java.security.cert.X509CertSelector;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.logging.Logger;

import org.bouncycastle.asn1.ASN1Object;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.cms.CMSSignedData;
import org.jscep.util.LoggingUtil;

/**
 * This class handles responses to <code>GetCACert</code> requests.
 * 
 * @author David Grant
 */
public class CaCertificateContentHandler implements ScepContentHandler<List<X509Certificate>> {
    private static Logger LOGGER = LoggingUtil.getLogger(CaCertificateContentHandler.class);

    /**
     * {@inheritDoc}
     */
    public List<X509Certificate> getContent(InputStream in, String mimeType) throws IOException {
        LOGGER.entering(getClass().getName(), "getContent", new Object[] { in, mimeType });

        final List<X509Certificate> certs = new ArrayList<X509Certificate>(2);
        final CertificateFactory cf;
        try {
            cf = CertificateFactory.getInstance("X.509");
        } catch (CertificateException e) {
            IOException ioe = new IOException(e);

            LOGGER.throwing(getClass().getName(), "getContent", ioe);
            throw ioe;
        }

        if (mimeType.equals("application/x-x509-ca-cert")) {
            // http://tools.ietf.org/html/draft-nourse-scep-20#section-4.1.1.1
            try {

                X509Certificate ca = (X509Certificate) cf.generateCertificate(in);

                // There should only ever be one certificate in this response.
                certs.add(ca);
            } catch (CertificateException ce) {
                IOException ioe = new IOException(ce);

                LOGGER.throwing(getClass().getName(), "getContent", ioe);
                throw ioe;
            }
        } else if (mimeType.equals("application/x-x509-ca-ra-cert")) {
            // If an RA is in use, a certificates-only PKCS#7 SignedData
            // with a certificate chain consisting of both RA and CA certificates is
            // returned.
            // It should be in the order:
            // [0] RA
            // [1] CA
            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            int b;
            while ((b = in.read()) != -1) {
                baos.write(b);
            }

            // This area needs testing!

            CertStore store;
            try {
                byte[] bytes = baos.toByteArray();
                if (bytes.length == 0) {
                    throw new IOException("Expected a SignedData object, but response was empty");
                }
                CMSSignedData sd = new CMSSignedData(bytes);

                store = sd.getCertificatesAndCRLs("Collection", (String) null);
            } catch (Exception e) {
                throw new IOException(e);
            }

            CertSelector selector = new X509CertSelector();
            try {
                @SuppressWarnings("unchecked")
                Collection<X509Certificate> certsCollection = (Collection<X509Certificate>) store
                        .getCertificates(selector);
                for (X509Certificate cert : certsCollection) {
                    certs.add(cert);
                }
            } catch (CertStoreException e) {
                IOException ioe = new IOException(e);

                LOGGER.throwing(getClass().getName(), "getContent", ioe);
                throw ioe;
            }
        } else {
            IOException ioe = new IOException("Invalid Content Type");

            LOGGER.throwing(getClass().getName(), "getContent", ioe);
            throw ioe;
        }

        LOGGER.exiting(getClass().getName(), "getContent", certs);

        return certs;
    }
}