(Node.js) Examine SSL/TLS Server Certificate

See more Socket/SSL/TLS Examples

Demonstrates how an application can examine and check a server's SSL/TLS 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() {

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    var socket = new chilkat.Socket();

    // Connect to a server.
    var useTls = true;
    var maxWaitMs = 2000;
    var success = socket.Connect("www.intel.com",443,useTls,maxWaitMs);
    if (success == false) {
        console.log(socket.LastErrorText);
        return;
    }

    // If we get here, the TLS connection ws made..
    // In any SSL/TLS handshake, the server sends its certificate in a TLS handshake message.
    // Chilkat will keep it cached within the object that made the connection.
    // Get the server's cert and examine a few things.
    // cert: Cert
    var cert = socket.GetSslServerCert();
    if (socket.LastMethodSuccess == false) {
        // This is unexpected..
        console.log(socket.LastErrorText);
        return;
    }

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

    console.log("Expired: " + cert.Expired);
    console.log("Revoked: " + cert.Revoked);
    console.log("Signature Verified: " + cert.SignatureVerified);
    console.log("Trusted Root: " + cert.TrustedRoot);

    // Sample output:

    // Distinguished Name: C=US, ST=California, O=Intel Corporation, CN=*.intel.com
    // Common Name: *.intel.com
    // Issuer Distinguished Name: C=GB, ST=Greater Manchester, L=Salford, O=Sectigo Limited, CN=Sectigo RSA Organization Validation Secure Server CA
    // Issuer Common Name: Sectigo RSA Organization Validation Secure Server CA
    // Expired: False
    // Revoked: False
    // Signature Verified: True
    // Trusted Root: True


}

chilkatExample();