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Tomcat example source code file (SSLValve.java)

This example Tomcat source code file (SSLValve.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Tomcat tags/keywords

bytearrayinputstream, certificate-----\n, certificate-----\n, certificatefactory, io, ioexception, response, servlet, servletexception, servletexception, sslvalve, string, string, valvebase, x509certificate, x509certificate

The Tomcat SSLValve.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.valves;

import java.io.IOException;
import java.io.ByteArrayInputStream;

import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

import javax.servlet.ServletException;

import org.apache.catalina.valves.ValveBase;
import org.apache.catalina.connector.Request;
import org.apache.catalina.connector.Response;
import org.apache.catalina.util.StringManager;

/*
 * Valve to fill the SSL informations in the request
 * mod_header is used to fill the headers and the valve
 * will fill the parameters of the request.
 * In httpd.conf add the following:
 * <IfModule ssl_module>
 *   RequestHeader set SSL_CLIENT_CERT "%{SSL_CLIENT_CERT}s"
 *   RequestHeader set SSL_CIPHER "%{SSL_CIPHER}s"
 *   RequestHeader set SSL_SESSION_ID "%{SSL_SESSION_ID}s"
 *   RequestHeader set SSL_CIPHER_USEKEYSIZE "%{SSL_CIPHER_USEKEYSIZE}s"
 * </IfModule>
 *
 * @author Jean-Frederic Clere
 * @version $Revision: 420067 $, $Date: 2006-07-08 09:16:58 +0200 (sub, 08 srp 2006) $
 */

public class SSLValve
    extends ValveBase {
/*
    private static final String info =
        "SSLValve/1.0";
    protected static StringManager sm =
        StringManager.getManager(Constants.Package);
    public String getInfo() {
        return (info);
    }
    public String toString() {
        StringBuffer sb = new StringBuffer("SSLValve[");
                if (container != null)
            sb.append(container.getName());
        sb.append("]");
        return (sb.toString());
    }
 */
    public String mygetHeader(Request request, String header) {
        String strcert0 = request.getHeader(header);
        if (strcert0 == null)
            return null;
        /* mod_header writes "(null)" when the ssl variable is no filled */
        if ("(null)".equals(strcert0))
            return null;
        return strcert0;
    } 
    public void invoke(Request request, Response response)
        throws IOException, ServletException {

        /* mod_header converts the '\n' into ' ' so we have to rebuild the client certificate */
        String strcert0 = mygetHeader(request, "ssl_client_cert");
        if (strcert0 != null && strcert0.length()>28) {
            String strcert1 = strcert0.replace(' ', '\n');
            String strcert2 = strcert1.substring(28, strcert1.length()-26);
            String strcert3 = new String("-----BEGIN CERTIFICATE-----\n");
            String strcert4 = strcert3.concat(strcert2);
            String strcerts = strcert4.concat("\n-----END CERTIFICATE-----\n");
            // ByteArrayInputStream bais = new ByteArrayInputStream(strcerts.getBytes("UTF-8"));
            ByteArrayInputStream bais = new ByteArrayInputStream(strcerts.getBytes());
            X509Certificate jsseCerts[] = null;
            try {
                CertificateFactory cf = CertificateFactory.getInstance("X.509");
                X509Certificate cert = (X509Certificate) cf.generateCertificate(bais);
                jsseCerts = new X509Certificate[1];
                jsseCerts[0] = cert;
            } catch (java.security.cert.CertificateException e) {
                System.out.println("SSLValve failed " + strcerts);
                System.out.println("SSLValve failed " + e);
            }
            request.setAttribute("javax.servlet.request.X509Certificate", jsseCerts);
        }
        strcert0 = mygetHeader(request, "ssl_cipher");
        if (strcert0 != null) {
            request.setAttribute("javax.servlet.request.cipher_suite", strcert0);
        }
        strcert0 = mygetHeader(request, "ssl_session_id");
        if (strcert0 != null) {
            request.setAttribute("javax.servlet.request.ssl_session", strcert0);
        }
        strcert0 = mygetHeader(request, "ssl_cipher_usekeysize");
        if (strcert0 != null) {
            request.setAttribute("javax.servlet.request.key_size", strcert0);
        }
        getNext().invoke(request, response);
    }
}

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