[JavaScript] How to open the KeyStore.

open_keystore.js

/*
 * The following snippet uses the Forge JavaScript library (https://github.com/digitalbazaar/forge)
 * to open the keystore file containing the certificate and key pairs used to sign the requests to be
 * sent. The first parameter expected is the absolute path for the keystore to be used. The second
 * parameter expected is the MD5 hash of keystore's password, encoded using BASE64. 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. 
 */
const fs = require('fs');

function openKeyStore(keyStoreFilePath, encodedPassword) {
    var asn1 = forge.asn1.fromDer(
      fs.readFileSync(keystoreFilePath, 'binary')
    );
    return forge.pkcs12.pkcs12FromAsn1(asn1, encodedPassword);
}