@cybersource/flex-sdk-node/lib/cgk/cgkHeaders.js

Easily create keys for use in a Flex API integration and verifying Flex token contents

/* Copyright (c) 2018 by CyberSource */

const crypto = require('crypto');
const { URL } = require('url');
const signature = require('./signature');

function generateHeaders(config, messageBody) {
  const digest = crypto.createHash('sha256').update(messageBody).digest('base64');

  const headers = {
    host: new URL(config.getUrl()).host,
    date: new Date(Date.now()).toUTCString(), // 'Thu, 25 May 2017 16:34:09 GMT'
    '(request-target)': 'post /flex/v1/keys',
    digest: `SHA-256=${digest}`,
    'v-c-merchant-id': config.mid,
  };
  headers.signature = signature(headers, config.keyId, config.sharedSecret);
  delete headers['(request-target)']; // removing as invalid http header
  return headers;
}

module.exports = generateHeaders;