proteus-hd/src/proteus/util/MemoryUtil.js

Signal Protocol (with header encryption) implementation for JavaScript. Based on Proteus.js.

/*
 * Wire
 * Copyright (C) 2016 Wire Swiss GmbH
 *
 * 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/.
 *
 */

'use strict';

const sodium = require('libsodium-wrappers-sumo');

/** @module util */

const MemoryUtil = {
  /**
   * @param {!(Uint8Array|ArrayBuffer|Object)} object
   * @returns {void}
   */
  zeroize(object) {
    if (object instanceof Uint8Array) {
      sodium.memzero(object);
    } else if (object instanceof ArrayBuffer) {
      sodium.memzero(new Uint8Array(object));
    } else if (typeof object === 'object') {
      Object.keys(object).map((key) => object[key]).forEach((val) => this.zeroize(val));
    }
  },
};

module.exports = MemoryUtil;