(Node.js) Write PKCS1 or PKCS8 Public Key PEM

Demonstrates how to write either PKCS1 or PKCS8 format PEM files. PKCS1 public keys have this PEM format:

-----BEGIN RSA PUBLIC KEY-----
BASE64 ENCODED DATA
-----END RSA PUBLIC KEY-----

-----BEGIN PUBLIC KEY-----
BASE64 ENCODED DATA
-----END PUBLIC KEY-----

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() {

    // Unlock the Chilkat API.
    // Starting in v9.5.0.49, all Chilkat classes can be unlocked at once at the beginning of a program
    // by calling UnlockBundle.  It requires a Bundle unlock code.
    var chilkatGlob = new chilkat.Global();
    var success = chilkatGlob.UnlockBundle("Anything for 30-day trial.");
    if (success !== true) {
        console.log(chilkatGlob.LastErrorText);
        return;
    }

    var pem = new chilkat.Pem();

    // Load a public key from a PEM file.
    // (Assume the PEM contains at least one public key..)
    success = pem.LoadPemFile("/Users/chilkat/testData/pem/myPublicKey.pem");
    if (success !== true) {
        console.log(pem.LastErrorText);
        return;
    }

    var i;
    var numPublicKeys = pem.NumPublicKeys;
    if (numPublicKeys == 0) {
        console.log((("Error: Expected the PEM to contain public keys.")));
        return;
    }

    // Get each public key as PEM, first in PKCS1 format, then in PKCS8.
    for (i = 1; i <= numPublicKeys; i++) {

        // First output to PKCS1 PEM format:
        console.log("This is PKCS1 format:");
        pem.PublicKeyFormat = "pkcs1";
        console.log(pem.ToPem());

        // Now PKCS8 PEM format:
        console.log("This is PKCS8 format:");
        pem.PublicKeyFormat = "pkcs8";
        console.log(pem.ToPem());

    }


}

chilkatExample();