ClientRequest.java

package com.vegaasen.playhouse.cert.run;

import com.telenor.sec.certificate.cert.CertificateUtils;
import com.telenor.sec.certificate.common.CertificateProperties;

import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSocketFactory;
import java.io.IOException;
import java.net.URL;
import java.security.cert.Certificate;
import java.security.cert.CertificateEncodingException;
import java.security.cert.X509Certificate;

/**
 * @author <a href="vegard.aasen@telenor.com">Vegard Aasen</a>
 */
public final class ClientRequest {

    private static final String
            KEYSTORE = "whatnot.jks",
            KEYSTORE_PASSWORD = "whatnot",
            SERVER_HOST = "https://otl.telenormobil.no/",
            TRUSTSTORE = "",
            TRUSTSTORE_PASSWORD = "";

    public static void main(final String... args) {
        try {
            configureKeyStore();
            final URL url = new URL(SERVER_HOST);
            final HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
            conn.setSSLSocketFactory(configureSslSocketFactory());
            conn.connect();
            final Certificate[] certs = conn.getServerCertificates();
            if (certs != null) {
                System.out.println("Connected! The server certificates seems to be in order.\n*********Some cool server-certificate-information*********");
                for (final Certificate certificate : certs) {
                    X509Certificate cert = CertificateUtils.getCertificateFromByteArray(certificate.getEncoded(), CertificateProperties.ALG_X_509);
                    System.out.println(cert.getSubjectDN());
                }
            } else {
                System.out.print("Connected, however unable to fetch server certificates.");
            }
            System.out.println(String.format("Protocol used: {%s}", System.getProperty("https.protocols")));
        } catch (final IOException e) {
            System.out.print("Something went wrong.");
            e.printStackTrace();
        } catch (CertificateEncodingException e) {
            e.printStackTrace();
        }
    }

    private static SSLSocketFactory configureSslSocketFactory() {
        return (SSLSocketFactory) SSLSocketFactory.getDefault();
    }

    private static void configureKeyStore() {
        System.setProperty("javax.net.ssl.keyStore", ClassLoader.getSystemResource(KEYSTORE).getPath());
        System.setProperty("javax.net.ssl.keyStorePassword", KEYSTORE_PASSWORD);
        System.setProperty("https.protocols", "SSLv3,SSLv2Hello");
    }

    private static void configureTrustStore() {
        System.setProperty("javax.net.ssl.trustStore", ClassLoader.getSystemResource(TRUSTSTORE).getPath());
        System.setProperty("javax.net.ssl.trustStorePassword", TRUSTSTORE_PASSWORD);
    }

}