(Node.js) Get Issuer Certificate Information

See more Certificates Examples

A certificate contains information about its issuer. This example demonstrates how to get the issuer information from a certificate.

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() {

    var cert = new chilkat.Cert();

    var success = cert.LoadFromFile("qa_data/certs/sample.cer");
    if (success == false) {
        console.log(cert.LastErrorText);
        return;
    }

    // Get issuer information:

    // -----------------------------------------------------------------------
    // (Not all subject fields may exist depending on the issuer certificate.)
    // -----------------------------------------------------------------------

    // Issuer DN (Distinguished Name, i.e. all the Issuer subject parts)
    console.log("DN: " + cert.IssuerDN);

    // Common Subject parts:
    // Issuer Common Name
    console.log("CN: " + cert.IssuerCN);

    // Issuer Country
    console.log("C: " + cert.IssuerC);

    // Issuer Email address
    console.log("E: " + cert.IssuerE);

    // Issuer Locality
    console.log("L: " + cert.IssuerL);

    // Issuer Organization
    console.log("O: " + cert.IssuerO);

    // Issuer Organizational Unit
    console.log("OU: " + cert.IssuerOU);

    // Issuer State
    console.log("S: " + cert.IssuerS);

}

chilkatExample();