(JavaScript) Examine Client Certificates for an Accepted TLS Connection

Demonstrates how to access the client certificates for a TLS connection accepted by your application acting as the server.

Note: This example requires Chilkat v11.0.0 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

var listenSslSocket = new CkSocket();

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

var cert = new CkCert();
success = cert.LoadPfxFile("qa_data/serverCert/myServerCert.pfx","pfx_password");
if (success == false) {
    console.log(cert.LastErrorText);
    return;
}

// 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");

// Initialize with our server's TLS certificate.
success = listenSslSocket.InitSslServer(cert);
if (success == false) {
    console.log(listenSslSocket.LastErrorText);
    return;
}

// Bind and listen on a port:
var myPort = 8123;
// Allow for a max of 5 queued connect requests.
var backLog = 5;
success = listenSslSocket.BindAndListen(myPort,backLog);
if (success == false) {
    console.log(listenSslSocket.LastErrorText);
    return;
}

// Accept the next incoming connection.
var maxWaitMillisec = 20000;

var clientSock = new CkSocket();
success = listenSslSocket.AcceptNext(maxWaitMillisec,clientSock);
if (success == false) {
    console.log(listenSslSocket.LastErrorText);
    return;
}

// Examine the client certs chain.  The 1st cert will be the client certificate, and
// the subsequent certs will be the certs in the chain of authentication.
var numClientCerts = clientSock.NumReceivedClientCerts;
console.log("numClientCerts = " + numClientCerts);

var clientCert = new CkCert();
var i = 0;
while (i < numClientCerts) {
    clientSock.GetRcvdClientCert(i,clientCert);
    console.log(clientCert.SubjectDN);
    i = i+1;
}

// Close the connection with the client
success = clientSock.Close(1000);