(Node.js) SFTP use Cert's Private Key for Authentication (Windows)

Demonstrates how to use the private key of a pre-installed certificate (on Windows) for SFTP authentication. The certificate's private key must be marked as "exportable" when originally installed.

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

    var cert = new chilkat.Cert();

    // Load the certificate from the Windows certificate store
    var success = cert.LoadByCommonName("my_cert_common_name");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    // Get the private key.  
    // privKey: PrivateKey
    var privKey = cert.ExportPrivateKey();
    if (cert.LastMethodSuccess == false) {
        console.log(cert.LastErrorText);
        return;
    }

    var privKeyPem = privKey.GetPkcs8Pem();
    if (privKey.LastMethodSuccess == false) {
        console.log(privKey.LastErrorText);
        return;
    }

    var sshKey = new chilkat.SshKey();
    success = sshKey.FromOpenSshPrivateKey(privKeyPem);
    if (success == false) {
        console.log(sshKey.LastErrorText);
        return;
    }

    // Connect to an SSH/SFTP server
    var sftp = new chilkat.SFtp();
    success = sftp.Connect("sftp.example.com",22);
    if (success == false) {
        console.log(sftp.LastErrorText);
        return;
    }

    // Authenticate with the SSH server using a username + private key.
    // (The private key serves as the password.  The username identifies
    // the SSH user account on the server.)
    success = sftp.AuthenticatePk("mySshLogin",sshKey);
    if (success == false) {
        console.log(sftp.LastErrorText);
        return;
    }

    console.log("OK, the connection and authentication with the SSH server is completed.");

    // This example is only to show the connection + authentication using a private key associated with a certificate in the Windows certificate store...

}

chilkatExample();