Java Requires Chilkat v11.0.0+

Accept TLS Connection with Client Authentication

See more Socket/SSL/TLS Examples

Demonstrates how to accept a TLS connection requiring client authentication. This is the case where the TLS client sends a certificate. It is also known as "Two-Way SSL". Chilkat2 Java

import com.chilkatsoft.chilkat2.Cert;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Socket;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Socket listenSslSocket = new Socket();

        // An SSL/TLS server needs a digital certificate.  This example loads it from a PFX file.
        // Note: This is the server's certificate.

        Cert cert = new Cert();
        // The 1st argument is the file path, the 2nd arg is the
        // PFX file's password:
        try {
            cert.loadPfxFile("chilkat.pfx", "test");

            // To accept client client certificates in the TLS handshake,
            // we must indicate a list of acceptable client certificate root CA DN's
            // that are allowed.  (DN is an acronym for Distinguished Name.)
            // Call AddSslAcceptableClientCaDn once for each acceptable CA DN.
            // Here are a few examples so you can see the general format of a DN.
            listenSslSocket.addSslAcceptableClientCaDn("C=SE, O=AddTrust AB, OU=AddTrust External TTP Network, CN=AddTrust External CA Root");
            listenSslSocket.addSslAcceptableClientCaDn("O=Digital Signature Trust Co., CN=DST Root CA X3");

            // Use the certificate:
            listenSslSocket.initSslServer(cert);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Bind and listen on a port:
        int myPort = 8123;
        // Allow for a max of 5 queued connect requests.
        int backLog = 5;
        try {
            listenSslSocket.bindAndListen(myPort, backLog);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // If accepting an SSL/TLS connection, the SSL handshake is part of the connection
        // establishment process. This involves a few back-and-forth messages between the
        // client and server to establish algorithms and a shared key to create the secure
        // channel. The sending and receiving of these messages are governed by the
        // MaxReadIdleMs and MaxSendIdleMs properties. If these properties are set to 0
        // (and this is the default unless changed by your application), then the
        // AcceptNext can hang indefinitely during the SSL handshake process.
        // Make sure these properties are set to appropriate values before calling AcceptNext.

        // Set a 10 second max for waiting to read/write.  This is for the SSL/TLS handshake establishment.
        listenSslSocket.setMaxReadIdleMs(10000);
        listenSslSocket.setMaxSendIdleMs(10000);

        // Accept a single client connection and establish the secure SSL/TLS channel:
        int maxWaitMillisec = 20000;
        Socket clientSock = new Socket();
        String receivedMsg;
        try {
            listenSslSocket.acceptNext(maxWaitMillisec, clientSock);

            // The client (in this example) is going to send a "Hello Server! -EOM-"
            // message.  Read it:
            receivedMsg = clientSock.receiveUntilMatch("-EOM-");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(receivedMsg);

        // Send a "Hello Client! -EOM-" message:
        try {
            clientSock.sendString("Hello Client! -EOM-");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Close the connection with the client
        // Wait a max of 20 seconds (20000 millsec)
        clientSock.closeConnection(20000);
    }
}