(Node.js) Generate RSA Key and Export to Encrypted PEM

Node.js sample showing how to generate an RSA key and export to encrypted PEM.

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 rsa = new chilkat.Rsa();

    // Generate a 1024-bit key.  Chilkat RSA supports
    // key sizes ranging from 512 bits to 4096 bits.
    var success = rsa.GenerateKey(1024);
    if (success !== true) {
        console.log(rsa.LastErrorText);
        return;
    }

    // Get the private key as unencrypted XML:
    var keyXml = rsa.ExportPrivateKey();
    console.log(keyXml);

    // To encrypt the key -- meaning to get the key in
    // an encrypted PEM format -- load it into a PrivateKey object,
    // and then export to encrypted PEM:
    var privKey = new chilkat.PrivateKey();

    success = privKey.LoadXml(keyXml);
    if (success !== true) {
        console.log(privKey.LastErrorText);
        return;
    }

    var strEncPem;

    strEncPem = privKey.GetPkcs8EncryptedPem("myPassword");

    // You now have the private key in an encrypted format,
    // which may be (for example) saved to a database

}

chilkatExample();