Wrappers for SharedArrayBuffer. More...

Functions
	add_wrappers (wrappers)

Variables
var	proxyHandler

function let	_data = new originalF(target)

var	proxy = new Proxy(_data, ${proxyHandler})

var	wrappers

Detailed Description

Wrappers for SharedArrayBuffer.

Author: Copyright (C) 2020 Peter Hornak

License:: SPDX-License-Identifier: GPL-3.0-or-later

This wrapper aims on prevention of misusing SharedArrayBuffer to create perfect timers and to perfrom microarchitectural attacks. This code was originally a part of https://github.com/IAIK/ChromeZero.

See also: https://www.fit.vut.cz/study/thesis/22374/?year=0&sup=Pol%C4%8D%C3%A1k, especially Sect. 5.1; Schwarz M., Maurice C., Gruss D., Mangard S. (2017) Fantastic Timers and Where to Find Them: High-Resolution Microarchitectural Attacks in JavaScript. In: Kiayias A. (eds) Financial Cryptography and Data Security. FC 2017. Lecture Notes in Computer Science, vol 10322. Springer, Cham. https://doi.org/10.1007/978-3-319-70972-7_13

Function Documentation

◆ add_wrappers()

add_wrappers ( wrappers wrappers )

Adds a list of wrapping objects to the build_wrapping_code.

This function is called from each wrapper in its file.

Variable Documentation

◆ _data

function let _data = new originalF(target)

◆ proxy

return proxy = new Proxy(_data, ${proxyHandler})

◆ proxyHandler

var proxyHandler

Initial value:

= `{
  get(target, key, receiver) {
    let j;
    let slow = Math.floor(Math.random() * 10000)
    for (let i = 0; i < slow;) {
      j = i;
      i = j + 1;
    }
    let value = target[key];
    return typeof value == 'function' ? value.bind(target) : value;
  },
  set(target, key, value) {
    let j;
    let slow = Math.floor(Math.random() * 10000);
    for (let i = 0; i < slow;) {
      j = i;
      i = j + 1;
    }
    return Reflect.set(...arguments);
  }
}`

◆ wrappers

var wrappers