(Node.js) Get Certificate's Public Key

Loads a certificate from PEM and gets the 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, MacOS

var os = require('os');
if (os.platform() == 'win32') {  
  var chilkat = require('@chilkat/ck-node23-win64'); 
} else if (os.platform() == 'linux') {
    if (os.arch() == 'arm') {
        var chilkat = require('@chilkat/ck-node23-linux-arm');
    } else if (os.arch() == 'arm64') {
        var chilkat = require('@chilkat/ck-node23-linux-arm64');
    } else {
        var chilkat = require('@chilkat/ck-node23-linux-x64');
    }
} else if (os.platform() == 'darwin') {
  var chilkat = require('@chilkat/ck-node23-mac-universal');
}

function chilkatExample() {

    var cert = new chilkat.Cert();

    var strPem = "-----BEGIN CERTIFICATE----- ...";

    var success = cert.LoadPem(strPem);
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // pubKey: PublicKey
    var pubKey = cert.ExportPublicKey();
    if (cert.LastMethodSuccess == false) {
        console.log(cert.LastErrorText);
        return;
    }

    // You can now use the public key object however it is needed,
    // and access its various properties and methods..

    console.log(pubKey.GetXml());


}

chilkatExample();