(Node.js) Load DER encoded X.509 Certificate (.cer, .crt)

Loads a digital certificate from a binary DER encoded X.509 Certificate (.cer, .crt) and fetches information about the cert.

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 success;

    // LoadFromFile will load virtually any certificate format file.
    // It will auto-recognize the format and load appropiately.
    success = cert.LoadFromFile("/Users/chilkat/testData/cer/chilkat_ssl.cer");
    if (success !== true) {
        console.log(cert.LastErrorText);
        return;
    }

    // DN = "Distinguished Name"
    console.log("SubjectDN:" + cert.SubjectDN);

    console.log("Common Name:" + cert.SubjectCN);
    console.log("Issuer Common Name:" + cert.IssuerCN);

    console.log("Serial Number:" + cert.SerialNumber);

}

chilkatExample();