(Node.js) Get the Certificate with Private Key from a Java KeyStore

See more Java KeyStore (JKS) Examples

Load a Chilkat certificate object from a Java KeyStore.

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

    // Most of the time a .jks contains one certificate with it's associated private key.
    // (Similar to how a .pfx/.p12 usually contains a particular certificate with private key.)
    // This example demonstrates how to get the certificate with private key such that it can be used
    // by other Chilkat classes wherever a cert w/ private key is needed.
    var jks = new chilkat.JavaKeyStore();
    var password = "secret";
    var success = jks.LoadFile(password,"qa_data/jks/test_secret.jks");
    if (success !== true) {
        console.log(jks.LastErrorText);
        return;
    }

    // Make sure we have a private key.
    if (jks.NumPrivateKeys < 1) {
        console.log("No private key available.");
        return;
    }

    // -------------------------------------------------------------------------
    // Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
    // chain: CertChain
    var chain = jks.GetCertChain(0);
    if (jks.LastMethodSuccess !== true) {
        console.log(jks.LastErrorText);
        return;
    }

    // cert: Cert
    var cert = chain.GetCert(0);
    if (chain.LastMethodSuccess !== true) {
        console.log(chain.LastErrorText);

        return;
    }

    // Verify again that this cert has a private key.
    if (cert.HasPrivateKey() !== true) {
        console.log("Certificate has no associated private key.");

        return;
    }

    // We now have the cert object with it's associated private key, and it can be used in other Chilkat classes where needed.
    // For example..

    var crypt = new chilkat.Crypt2();
    success = crypt.SetSigningCert(cert);
    if (success == false) {
        console.log(crypt.LastErrorText);
        return;
    }

    // ...
    // ...


}

chilkatExample();