jscrambler/dist/lib/generate-signed-params.js

JScrambler API client.

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = signedParams;

var _lodash = require('lodash.clone');

var _lodash2 = _interopRequireDefault(_lodash);

var _crypto = require('crypto');

var _crypto2 = _interopRequireDefault(_crypto);

var _lodash3 = require('lodash.defaults');

var _lodash4 = _interopRequireDefault(_lodash3);

var _lodash5 = require('lodash.keys');

var _lodash6 = _interopRequireDefault(_lodash5);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var debug = !!process.env.DEBUG;

function signedParams(method, path, host, keys) {
  var params = arguments.length <= 4 || arguments[4] === undefined ? {} : arguments[4];

  params = (0, _lodash4.default)((0, _lodash2.default)(params), {
    access_key: keys.accessKey,
    timestamp: new Date().toISOString()
  });
  params.signature = generateHmacSignature(method, path, host, keys, params);
  return params;
}

function generateHmacSignature(method, path, host, keys, params) {
  var paramsCopy = (0, _lodash2.default)(params);
  var signatureData = method.toUpperCase() + ';' + host.toLowerCase() + ';' + path + ';' + buildSortedQuery(paramsCopy);
  debug && console.log('Signature data: ' + signatureData);
  var hmac = _crypto2.default.createHmac('sha256', keys.secretKey.toUpperCase());
  hmac.update(signatureData);
  return hmac.digest('base64');
}

function buildSortedQuery(params) {
  // Sorted keys
  var _keys = (0, _lodash6.default)(params).sort();
  var query = '';
  for (var i = 0, l = _keys.length; i < l; i++) {
    query += encodeURIComponent(_keys[i]) + '=' + encodeURIComponent(params[_keys[i]]) + '&';
  }
  query = query.replace(/\*/g, '%2A').replace(/[!'()]/g, escape).replace(/%7E/g, '~').replace(/\+/g, '%20');
  // Strip the last separator and return
  return query.substring(0, query.length - 1);
}
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