(Node.js) Secure FTP with Client Certificate

Chilkat FTP2 provides the ability to use a client certificate with secure FTP (implicit or explicit SSL/TLS). This example demonstrates how to load a certificate from a .pfx and use it as the client-side SSL cert. Note: Client-side certificates are only needed in situations where the server demands one.

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 ftp = new chilkat.Ftp2();

    ftp.Hostname = "ftp.***.com";
    ftp.Port = 21;
    ftp.Username = "test";
    ftp.Password = "test";

    // This example will use explict TLS/SSL.
    // Establish an explicit secure channel after connection
    // on the standard FTP port 21.
    ftp.AuthTls = true;

    // The Ssl property is for establishing an implicit SSL connection
    // on port 990.  Because this example uses explicit SSL, it 
    // should remain false.
    ftp.Ssl = false;

    // Load a certificate from a .pfx
    // A PFX may contain several certs, including the certificates
    // in a chain of authority.
    var certStore = new chilkat.CertStore();
    var password;
    password = "***";
    // Load the certs from a PFX into an in-memory certificate store:
    var success = certStore.LoadPfxFile("chilkat.pfx",password);
    if (success !== true) {
        console.log(certStore.LastErrorText);
        return;
    }

    // Find the exact cert we'll use:
    // cert: Cert
    var cert;
    cert = certStore.FindCertBySubject("Chilkat Software, Inc.");
    if (certStore.LastMethodSuccess == false) {
        console.log("Certificate not found!");
        return;
    }

    // Use this certificate for our secure (SSL/TLS) connection:
    success = ftp.SetSslClientCert(cert);

    // Connect and login to the FTP server.  The connection is 
    // made secure because of the AuthTls setting.
    success = ftp.Connect();
    if (success !== true) {
        console.log(ftp.LastErrorText);
        return;
    }
    else {
        // LastErrorText contains information even when
        // successful. This allows you to visually verify
        // that the secure connection actually occurred.
        console.log(ftp.LastErrorText);
    }

    console.log("Secure FTP Channel Established!");

    // Do whatever you're doing to do ...
    // upload files, download files, etc...

    // .....
    // .....

    success = ftp.Disconnect();

}

chilkatExample();