plivo-promise/src/createSignature.js

Plivo NodeJS helper library.Now with promise

// For verifying the plivo server signature
export default function createPlivoSignature(url, params, options) {
  var toSign = url;

  Object.keys(params).sort().forEach(function(key) {
    toSign += key + params[key];
  });

  var signature = crypto
    .createHmac('sha1', options.authToken)
    .update(new Buffer(toSign, 'utf-8'))
    .digest('base64');

  return signature;
};