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Name	Size	Permission
inputValidation.js	6.52 KB	-rw-r--r--
loginAttempts.js	1.73 KB	-rw-r--r--
sessionTimeout.js	862 B	-rw-r--r--

Code Editor : loginAttempts.js

import crypto from 'crypto';

const MAX_ATTEMPTS = 5;
const LOCKOUT_DURATION = 15 * 60 * 1000; // 15 minutes
const BASE_DELAY = 1000; // 1 second base delay

export const loginAttempts = (req, res, next) => {
  const ip = req.ip;
  const email = req.body.email;
  const key = `login_${crypto.createHash('sha256').update(ip + email).digest('hex')}`;
  
  if (!req.app.locals.loginAttempts) {
    req.app.locals.loginAttempts = {};
  }

const now = Date.now();
  const attemptData = req.app.locals.loginAttempts[key] || {
    count: 0,
    lastAttempt: 0,
    lockoutUntil: 0
  };

// Check if account is locked
  if (attemptData.lockoutUntil > now) {
    const timeLeft = Math.ceil((attemptData.lockoutUntil - now) / 1000 / 60);
    return res.status(429).json({
      message: `Account temporarily locked. Please try again in ${timeLeft} minutes.`,
      code: 'ACCOUNT_LOCKED'
    });
  }

// Reset attempts if last attempt was more than 15 minutes ago
  if (now - attemptData.lastAttempt > LOCKOUT_DURATION) {
    attemptData.count = 0;
  }

// Calculate delay based on number of attempts
  const delay = Math.min(BASE_DELAY * Math.pow(2, attemptData.count), 10000); // Max 10 seconds

// Update attempt data
  attemptData.count++;
  attemptData.lastAttempt = now;

// Lock account if max attempts reached
  if (attemptData.count >= MAX_ATTEMPTS) {
    attemptData.lockoutUntil = now + LOCKOUT_DURATION;
    return res.status(429).json({
      message: 'Too many failed attempts. Account locked for 15 minutes.',
      code: 'ACCOUNT_LOCKED'
    });
  }

req.app.locals.loginAttempts[key] = attemptData;

// Add delay before processing the request
  setTimeout(() => {
    next();
  }, delay);
};

Urban Research Lab

The Urban Research Lab (URL) at IIIT-Delhi was established in 2020, during a time when the pandemic brought the complexities of urban life more visible than ever. What started as an initiative by faculty and students has grown into a collaborative space for critically exploring and reimagining the urban questions through research, dialogue, and interdisciplinary engagement.

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Code Editor : loginAttempts.js

Urban Research Lab