[JavaScript] How to retrieve the certificate and the private key from the KeyStore.

load_certificate.js

/*
 * The following snippet uses the Forge JavaScript library (https://github.com/digitalbazaar/forge)
 * to retrieve the certificate and the private key from the keystore. It receives a Forge's PKCS12
 * object instance and returns a simple object containing the retrieved certificate and private key
 * (assuming that the keystore contains only one certificate). The certificate is required to be sent
 * with the signed request, while the private key is used to sign the request before send it.
 * For more information about how to use the Forge JavaScript library, please, refer to the aforementioned URL.
 *
 * Gists provided for illustrative purposes only. Developers can use these as a support tool
 * but the Office of the Revenue Commissioners (Revenue) does not provide any warranty with 
 * these gists. 
 */
function getCertificateAndKeyFromKeyStore(pkcs12KeyStore) {
    var certificateBag = pkcs12KeyStore.getBags({ 'bagType': forge.pki.oids.certBag });
    var privateKeyBag = pkcs12KeyStore.getBags({ 'bagType': forge.pki.oids.pkcs8ShroudedKeyBag });
    var certificate = certificateBag[forge.pki.oids.certBag][0].cert;
    var privateKey = privateKeyBag[forge.pki.oids.pkcs8ShroudedKeyBag][0].key;
    return {
        certificate: certificate,
        privateKey: privateKey
    };
}