From: Michal <lists+rubytalk@...>
Date: 2005-11-27T06:50:22+09:00
Subject: [ANN] Turing 0.0.7 && cry for help

Hello all,

I have just released a new library for Ruby:

http://turing.rubyforge.org/

Turing is implementation of Captcha (Completely Automated Public Turing-Test
to Tell Computers and Humans Apart) that is both easy to use and easy to
customize/extend.


It makes use of the excellent Ruby/GD2 gem released by Robert Leslie.


At this time there are three levels of abstraction you can use:

* Turing::Image - Simple obfuscated image generator with plugin design.

  ti = Turing::Image.new(:width => 280, :height => 115)
  ti.generate(File.join(Dir.getwd, 'a.jpg'), "randomword")

* Turing::Challenge: Captcha challenge generator and verifier.

  tc = Turing::Challenge.new(:store => 'store', :outdir => '.')
  c = tc.generate_challenge

  system("xv", c.file)

  puts "Enter solution:"
  r = $stdin.gets.chomp

  if tc.valid_answer?(c.id, r)
      puts "That's right."
  else
      puts "I don't think so."
  end

* Turing::CGIHandler: Simple Turing::Challenge wrapper designed to run as CGI.

  tcgi_config = {
      :imagepath => "/imgs",
      :outdir => '/home/wejn/ap/htdocs/imgs',
      :store => '/home/wejn/ap/data/turing.pstore',
      :redirect_to => 'http://localhost:8000/secured/',
  }
  tcgi_config[:on_success] = proc do
      out = {}
      out[:headers] = {
          "cookie" => CGI::Cookie.new({
              'name' => 'turing_passed',
              'value' => 'true',
              'path' => '/',
              'expires' => Time.now + 3600*24,
              }),
          "dude" => "you_rock!",
      }
      out
  end
  Turing::CGIHandler.new(tcgi_config).handle

You can find (r)doc, gem and samples via the site mentioned above.

Rg,
            Michal S.

PS: This is my cry for help: I'm looking for volunteer to help me
    perform end-user (and performance) test of Apache2 drop-in replacement
    for mod_auth that prevents (among other things) dictionary/bruteforce
    attacks against credentials. If it sounds like fun, please check out
    details: http://wejn.org/ta-rt.html
-- 
# Michal Safranek, email:
a=(("a".."z").to_a+["@","."]);p(("%b"%[0x645bbb83a6a496]
).scan(/...../).map{|x|a[Integer("0b"+x)]}.join.reverse)