(Node.js) Generate RSA Public/Private Key Pair and Export to PEM

Node.js example code showing how to generate an RSA public/private key pair and export to PEM files.

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;
    }

    // Keys are exported in XML format:
    var publicKeyXml = rsa.ExportPublicKey();
    console.log(publicKeyXml);

    var privateKeyXml = rsa.ExportPrivateKey();
    console.log(privateKeyXml);

    // Save the private key in PEM format:
    var privKey = new chilkat.PrivateKey();
    success = privKey.LoadXml(privateKeyXml);
    success = privKey.SavePemFile("privateKey.pem");

    // Save the public key in PEM format:
    var pubKey = new chilkat.PublicKey();
    success = pubKey.LoadFromString(publicKeyXml);
    success = pubKey.SavePemFile(false,"publicKey.pem");

}

chilkatExample();