JCASSL.java

Example of TLS v1.2 authentication with a site using mutual authentication.

See Note on examples.

package doxy.examples;
 
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.Principal;
import java.security.Security;
import java.security.cert.Certificate;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.Enumeration;
import java.util.Iterator;
 
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.KeyManagerFactory;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManagerFactory;
 
public class JCASSL {
 
    static void printUsage()
    {
        System.out.println("Usage: <url> <path to host full cert chain> <key alias>");
        System.out.println("Ex.: https://nfe.fazenda.sp.gov.br/ws/nfestatusservico2.asmx ./sefaz-sp.p7b mykey");
    }
 
    public static void main(String[] args) {
 
        if(3 != args.length)
        {
            printUsage();
            return;
        }
 
        try
        {
            String httpURL = args[0];
            String chainPath = args[1];
            String keyAlias = args[2];
 
            /* Adds provider to JVM, dynamically. */
            Security.addProvider(new br.com.trueaccess.provider.netdfence.ND());
 
            /*
             * The TACV keystore type does not physically remove objects from the HSM.
             * This will make it easier to "filter" the keys in the key store.
             */
            KeyStore ks = KeyStore.getInstance("TACV", "ND");
            ks.load(null, "".toCharArray());
 
            /* Filters the keystore keys, leaving only the specified alias. */
            FilterKeyStore(keyAlias, ks);
 
 
            /*
             * Configures key store, trust store and connection parameters.
             * */
 
            KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
            kmf.init(ks, "".toCharArray());
 
            TrustManagerFactory tmf = TrustManagerFactory.getInstance("X509");
            tmf.init(getTrustKeyStore(chainPath));
 
            SSLContext sc = SSLContext.getInstance("TLSv1.2");
            sc.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
 
            SSLSocketFactory ssf = sc.getSocketFactory();
 
            URL url = new URL(httpURL);
            HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
 
            connection.setSSLSocketFactory(ssf);
 
            connection.setRequestMethod("GET");
            connection.setRequestProperty("User-Agent", "Java Client 1.0");
            connection.setRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml");
 
            connection.setUseCaches(false);
            connection.setDoOutput(true);
 
            connection.connect();
 
 
            /*
             * Lists the host's certificate chain.
             * This is the string sent by the host itself.
             *
             * */
 
            System.out.println("Host chain(received from host): ");
            System.out.println();
 
            Certificate[] serverCertificate = connection.getServerCertificates();
 
            int i = 0;
            for (Certificate certificate : serverCertificate) {
 
                if (certificate instanceof X509Certificate) {
                    X509Certificate x509cert = (X509Certificate) certificate;
 
                    Main main = x509cert.getSubjectDN();
                    System.out.println("["+ i + "] " + "Subject: " + main);
 
                    main = x509cert.getIssuerDN();
                    System.out.println("Issuer: " + main);
 
                    i++;
                  }
            }
 
            System.out.println();
 
            /*
             * Shows the content of the page accessed.
             */
 
            printContent(connection);
 
            connection.disconnect();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
 
    static void printContent(HttpsURLConnection connection)
    {
        if(null!= connection)
        {
            try {
 
               System.out.println("URL content:");
               System.out.println();
 
               BufferedReader buffReader =
                new BufferedReader(new InputStreamReader(connection.getInputStream()));
 
               String input;
 
               while ((input = buffReader.readLine()) != null)
               {
                  System.out.println(input);
               }
 
               buffReader.close();
            } catch (Exception e)
            {
               e.printStackTrace();
            }
        }
    }
 
    static KeyStore getTrustKeyStore(String chainPath)
    {
        String pwd = "12345678";
        KeyStore kstrusted = null;
 
        try {
            kstrusted = KeyStore.getInstance("JKS");
            kstrusted.load(null, pwd.toCharArray());
 
            //import client key
            FileInputStream fistrusted = new FileInputStream(chainPath);
            BufferedInputStream bistrusted = new BufferedInputStream(fistrusted);
 
            CertificateFactory cftrusted = CertificateFactory.getInstance("X.509");
            Collection c = cftrusted.generateCertificates(bistrusted);
            Iterator it = c.iterator();
            int i = 0;
            while (it.hasNext()) {
               Certificate cert = (Certificate)it.next();
               kstrusted.setCertificateEntry(""+i++, cert);
            }
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
 
        return kstrusted;
    }
 
    static void FilterKeyStore(String keyAlias, KeyStore keyStore)
    {
        try {
 
            Enumeration<String> keysInHSM = keyStore.aliases();
 
            while(keysInHSM.hasMoreElements())
            {
                String nextKey = (String)keysInHSM.nextElement();
                if(0 != nextKey.compareTo(keyAlias))
                {
                    keyStore.deleteEntry(nextKey);
                }
            }
 
        } catch (KeyStoreException e) {
            e.printStackTrace();
        }
    }
}