浅析node应用的timing-attack安全漏洞

var keywords = '((' + [
  'password',
  'secret',
  'api',
  'apiKey',
  'token',
  'auth',
  'pass',
  'hash'
 ].join(')|(') + '))';

 var re = new RegExp('^' + keywords + '$', 'im');

 function containsKeyword (node) {
  if (node.type === 'Identifier') {
   if (re.test(node.name)) return true;
  }
  return
 }
 if (node.test.operator === '==' || node.test.operator === '===' || node.test.operator === '!=' || node.test.operator === '!==') {
  // 在这里 console 出错误
 }

if (user.password === password) {
  return { state: true }; // 登录成功
 }

 // psdReceived 为用户输入密码；
 // psdDb 为系统中存储的正确用户密码
 const correctUser = (psdDb, psdReceived) => {
  const state = [];
  for (let i = 0; i < psdDb.length; ++i) {
   if (!psdReceived[i]) {
    state.push(false);
   } else {
    state.push(psdReceived.charCodeAt(i) ^ psdDb.charCodeAt(i));
   }
  }
  return state.length !== 0 && state.every(item => !item);
 }

import cryptiles from 'cryptiles';

......
return cryptiles.fixedTimeCimparison(passwordFromDb, passwordReceived);