(Node.js) SSL Server Example

Demonstrates how to create an SSL socket for accepting connections. This example is *very* simple in that it will create an SSL socket for accepting a single connection. It will read a message from the client, send a reply, and exit.

Note: This example requires Chilkat v10.1.2 or greater.

Install Chilkat for Node.js and Electron using npm at Chilkat npm packages for Node.js Chilkat npm packages for Electron on Windows, Linux, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

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

    var listenSslSocket = new chilkat.Socket();

    // An SSL server needs a digital certificate.  This example loads it from a PFX file.

    // Create an instance of a certificate store object, load a PFX file,
    // locate the certificate we need, and use it.
    // (a PFX file may contain more than one certificate.)
    var certStore = new chilkat.CertStore();
    // The 1st argument is the filename, the 2nd arg is the 
    // PFX file's password:
    var success = certStore.LoadPfxFile("chilkat.pfx","test");
    if (success !== true) {
        console.log(certStore.LastErrorText);
        return;
    }

    // Find the certificate to be used for SSL:
    var jsonCN = new chilkat.JsonObject();
    jsonCN.UpdateString("CN","example.com");

    var cert = new chilkat.Cert();
    success = certStore.FindCert(jsonCN,cert);
    if (success == false) {
        console.log(certStore.LastErrorText);
        return;
    }

    // Use the certificate:
    success = listenSslSocket.InitSslServer(cert);
    if (success !== true) {
        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 !== true) {
        console.log(listenSslSocket.LastErrorText);
        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 
    // AcceptNextConnection can hang indefinitely during the SSL handshake process. 
    // Make sure these properties are set to appropriate values before calling AcceptNextConnection.

    // Set a 10 second max for waiting to read/write.  This is for the SSL/TLS handshake establishment.
    listenSslSocket.MaxReadIdleMs = 10000;
    listenSslSocket.MaxSendIdleMs = 10000;

    // Accept a single client connection and establish the secure SSL/TLS channel:
    // clientSock: Socket
    var clientSock;
    var maxWaitMillisec = 20000;
    clientSock = listenSslSocket.AcceptNextConnection(maxWaitMillisec);
    if (listenSslSocket.LastMethodSuccess == false) {
        console.log(listenSslSocket.LastErrorText);
        return;
    }

    // The client (in this example) is going to send a "Hello Server! -EOM-" 
    // message.  Read it:
    var receivedMsg = clientSock.ReceiveUntilMatch("-EOM-");
    if (clientSock.LastMethodSuccess !== true) {
        console.log(clientSock.LastErrorText);
        return;
    }

    console.log(receivedMsg);

    // Send a "Hello Client! -EOM-" message:
    success = clientSock.SendString("Hello Client! -EOM-");
    if (success !== true) {
        console.log(clientSock.LastErrorText);
        return;
    }

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


}

chilkatExample();