R Fat aug2uag

Create socket.io middleware

Include the following code in your app.js module (other standard Express module dependancies and middleware left out for brevity):

var express = require('express');
var http = require('http');
var io = require('socket.io');
var routes = require('./routes/index');

var app = express();

Linksys EA4500 Firmware Decryption

I recently pulled a Linksys EA4500 out of storage for evaluation. The first thing I wanted to do was to update the firmware for the device. https://www.linksys.com/us/support-article?articleNum=148385 offers the latest version of the firmware, which is 3.1.7 as of this writing.

However, we can see with the filename that its probably encrypted: FW_EA4500V3_3.1.7.181919_prod.gpg.img

When I run binwalk I don't get any meaningful results, confirming my suspcicions:

reverse R33-sysupgrade-20180510-910b5192.bin

`file`

Just to make sure it is a firmware image instead of a zip file:

`strings`

This document installs Go LTS (1.13) as of the time it is written

1) Install Go (Git should already be installed)

$ cd /tmp/
$ wget https://dl.google.com/go/go1.13.linux-amd64.tar.gz
$ sha256sum go1.13.linux-amd64.tar.gz  # should end with "c48e856"
$ sudo tar -C /usr/local -xzf go1.13.linux-amd64.tar.gz

	# -- coding: utf-8 --
	"""
	Created on Fri Jun 11 18:58:05 2021
	# CALCULATE SENTENCE SIMILARITY
	@author: TAC
	"""
	import torch#pytorch
	from transformers import AutoTokenizer, AutoModel#for embeddings
	from sklearn.metrics.pairwise import cosine_similarity#for similarity

	from threading import Timer
	from functools import partial

	class Interval(object):

	def __init__(self, interval, function, args=[], kwargs={}):
	"""
	Runs the function at a specified interval with given arguments.
	"""
	self.interval = interval

	import io
	import scp
	import paramiko
	import boto3
	import logging

	logging.basicConfig(level=logging.DEBUG, format='%(asctime)s :: %(levelname)s :: %(message)s')
	boto_logger = logging.getLogger('boto_logger')

	###################### Private Stuff

	Install HAProxy from Homebre:
	`brew install haproxy`

	For full reference:
	https://serversforhackers.com/load-balancing-with-haproxy

	package singleton

	import (
	"sync"
	)

	type singleton struct {
	}

	var instance *singleton