(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.

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

var os = require('os');
if (os.platform() == 'win32') {  
    if (os.arch() == 'ia32') {
        var chilkat = require('@chilkat/ck-node21-win-ia32');
    } else {
        var chilkat = require('@chilkat/ck-node21-win64'); 
    }
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node21-arm');
    } else if (os.arch() == 'x86') {
        var chilkat = require('@chilkat/ck-node21-linux32');
    } else {
        var chilkat = require('@chilkat/ck-node21-linux64');
    }
} else if (os.platform() == 'darwin') {
    if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node21-mac-m1');
    } else {
        var chilkat = require('@chilkat/ck-node21-macosx');
    }
}

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:
    // cert: Cert
    var cert;
    cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
    if (certStore.LastMethodSuccess == 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();