be.fedict.eid.dss.sp.servlet.PkiServlet.java Source code

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Here is the source code for be.fedict.eid.dss.sp.servlet.PkiServlet.java

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/*
 * eID Digital Signature Service Project.
 * Copyright (C) 2009-2010 FedICT.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version
 * 3.0 as published by the Free Software Foundation.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, see
 * http://www.gnu.org/licenses/.
 */

package be.fedict.eid.dss.sp.servlet;

import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.security.KeyStore;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.io.IOUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.bouncycastle.openssl.PEMWriter;

public class PkiServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    private static final Log LOG = LogFactory.getLog(PkiServlet.class);

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        LOG.debug("doGet");
        String pemCertificate;
        try {
            pemCertificate = toPem(getPrivateKeyEntry().getCertificate());
        } catch (Exception e) {
            LOG.error(e);
            return;
        }

        response.setContentType("text/plain");
        PrintWriter out = response.getWriter();
        out.print(pemCertificate);
        out.close();
    }

    public static KeyStore.PrivateKeyEntry getPrivateKeyEntry() throws Exception {

        LOG.debug("get SP private key entry");

        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();

        KeyStore keyStore = KeyStore.getInstance("jks");
        InputStream keystoreStream = classLoader.getResourceAsStream("sp.jks");
        keyStore.load(keystoreStream, "secret".toCharArray());

        return (KeyStore.PrivateKeyEntry) keyStore.getEntry("sp",
                new KeyStore.PasswordProtection("secret".toCharArray()));
    }

    private static String toPem(Object object) {

        StringWriter buffer = new StringWriter();
        try {
            PEMWriter writer = new PEMWriter(buffer);
            LOG.debug("toPem: " + object.getClass().getName());
            writer.writeObject(object);
            writer.close();
            return buffer.toString();
        } catch (Exception e) {
            throw new RuntimeException("Cannot convert object to " + "PEM format: " + e.getMessage(), e);
        } finally {
            IOUtils.closeQuietly(buffer);
        }
    }
}