blinktrade/src/util/macaddress.js

BlinkTrade client for node.js

/**
 * BlinkTradeJS SDK
 * (c) 2016-present BlinkTrade, Inc.
 *
 * This file is part of BlinkTradeJS
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @flow
 */

/* eslint-disable operator-assignment */
/* eslint-disable no-plusplus */
/* eslint-disable import/prefer-default-export */
import macaddress from 'macaddress-secure';

export function getMac(callback: Function): void {
  macaddress.all((err, all) => {
    const hashCode = (str) => {
      let hash = 0;
      if (str.length === 0) return hash;
      for (let i = 0; i < str.length; i++) {
        hash = ((hash << 5) - hash) + str.charCodeAt(i);
        hash = hash & hash; // Convert to 32bit integer
      }
      return hash;
    };

    let macAddresses = '';
    Object.keys(all).forEach(iface => {
      macAddresses += all[iface].mac;
    });

    let fingerPrint = hashCode(macAddresses);
    if (fingerPrint < 0) {
      fingerPrint *= -1;
    }

    callback(fingerPrint);
  });
}