Module: PWN::Plugins::Tor

Defined in:
lib/pwn/plugins/tor.rb

Overview

This plugin processes images into readable text

Class Method Summary collapse

Class Method Details

.authors ⇒ Object

Author(s)

0day Inc. <[email protected]>



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# File 'lib/pwn/plugins/tor.rb', line 241

public_class_method def self.authors
  "AUTHOR(S):
    0day Inc. <[email protected]>
  "
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/plugins/tor.rb', line 249

public_class_method def self.help
  puts "USAGE:
    tor_obj = #{self}.start(
      ip: 'optional - IP address to listen (default: 127.0.0.1)',
      port: 'optional - socks port to listen (default: 9050)',
      ctrl_port: 'optional - tor control port to listen (default: 9051)',
      net: 'optional - CIDR notation to accept connections (default: 127.0.0.1/32)',
      data_dir: 'optional - directory to keep tor session data (default: /tmp/tor_pwn-TIMESTAMP)'
    )

    #{self}.switch_exit_node(
      tor_obj: 'required - tor_obj returned from #start method',
      response_timeout: 'optional - float in seconds to timeout (default: 3.0)'
    )

    #{self}.stop(
      tor_obj: 'required - tor_obj returned from #start method'
    )

    #{self}.authors
  "
end

.start(opts = {}) ⇒ Object

Supported Method Parameters

tor_obj = PWN::Plugins::Tor.start(

ip: 'optional - IP address to listen (default: 127.0.0.1)',
port: 'optional - socks port to listen (default: 1024-65535)',
ctrl_port: 'optional - tor control port to listen (default: 1024-65535)',
net: 'optional - CIDR notation to accept connections (default: 127.0.0.0.1/32)',
data_dir: 'optional - directory to keep tor session data (default: /tmp/tor_pwn-TIMESTAMP)'

)



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# File 'lib/pwn/plugins/tor.rb', line 86

public_class_method def self.start(opts = {})
  ip = opts[:ip]
  ip ||= '127.0.0.1'
  port = opts[:port].to_i
  port = PWN::Plugins::Sock.get_random_unused_port if port.zero?
  ctrl_port = opts[:ctrl_port].to_i
  if ctrl_port.zero?
    loop do
      ctrl_port = PWN::Plugins::Sock.get_random_unused_port
      break if ctrl_port != port
    end
  end

  net = opts[:net]
  net ||= "#{ip}/32"
  acl_net = NetAddr.parse_net(net)

  timestamp = Time.now.strftime('%Y-%m-%d_%H-%M-%S.%N%z')
  data_dir = opts[:data_dir]
  data_dir ||= "/tmp/tor_pwn-#{timestamp}"
  FileUtils.mkdir_p(data_dir)

  socks_proxy = "#{ip}:#{port}"
  pid_file = "#{data_dir}/tor.pid"
  cookie_authn_file = "#{data_dir}/control_auth_cookie"
  session_log_path = "#{data_dir}/stdout-session.log"
  session_log = File.new(session_log_path, 'w')
  session_log.sync = true
  session_log.fsync
  tor_obj = nil

  fork_pid = Process.fork do
    pty = PTY.spawn(
      'tor',
      'DataDirectory',
      data_dir,
      'SocksPort',
      socks_proxy,
      'ControlPort',
      ctrl_port.to_s,
      'CookieAuthentication',
      '1',
      'SocksPolicy',
      "accept #{acl_net}",
      'SocksPolicy',
      'reject *'
    ) do |stdout, _stdin, pid|
      File.write(pid_file, pid)
      stdout.each do |line|
        session_log.puts line
      end
    rescue Interrupt,
           Errno::EIO => e
      puts "\n#{self}.#{__method__}#spawn => Goodbye." if e.is_a?(Interrupt)
      tor_obj = {
        parent_pid: fork_pid,
        child_pid: pid,
        data_dir: data_dir
      }
      stop(tor_obj: tor_obj)
    end
  rescue Interrupt,
         Errno::EIO => e
    puts "\n#{self}.#{__method__}#fork => Goodbye." if e.is_a?(Interrupt)
    tor_obj = {
      parent_pid: fork_pid,
      data_dir: data_dir
    }
    stop(tor_obj: tor_obj)
  end

  Process.detach(fork_pid)

  loop do
    pid_ready = File.exist?(pid_file)
    cookie_authn_ready = File.exist?(cookie_authn_file)
    break if pid_ready && cookie_authn_ready
  end

  child_pid = File.read(pid_file).to_i
  cookie_authn = `hexdump -e '32/1 "%02x"' #{cookie_authn_file}`

  tor_obj = {
    parent_pid: fork_pid,
    child_pid: child_pid,
    ip: ip,
    port: port,
    ctrl_port: ctrl_port,
    data_dir: data_dir,
    cookie_authn: cookie_authn
  }
rescue Interrupt, SystemExit
  puts "\n#{self}.#{__method__} => Goodbye."
  stop(tor_obj: tor_obj) unless tor_obj.nil?
rescue StandardError => e
  puts "\n#{self}.#{__method__} => Goodbye."
  stop(tor_obj: tor_obj) unless tor_obj.nil?
  raise e
end

.stop(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Plugins::Tor.stop(

tor_obj: 'required - tor_obj returned from #start method'

)



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# File 'lib/pwn/plugins/tor.rb', line 209

public_class_method def self.stop(opts = {})
  tor_obj = opts[:tor_obj]

  return nil unless tor_obj.is_a?(Hash)

  child_pid = tor_obj[:child_pid]
  parent_pid = tor_obj[:parent_pid]
  data_dir = tor_obj[:data_dir]
  if child_pid || parent_pid || data_dir
    proc_list = PWN::Plugins::PS.list
    find_child_pid = proc_list.find { |arr| arr[2] == child_pid.to_s }
    find_parent_pid = proc_list.find { |arr| arr[2] == parent_pid.to_s }

    # puts "Killing Tor child PID: #{child_pid}..."
    Process.kill('SIGKILL', child_pid) if find_child_pid

    # puts "Killing Tor parent PID: #{parent_pid}..."
    Process.kill('SIGKILL', parent_pid) if find_parent_pid

    # puts "Removing Tor data directory: #{data_dir}..."
    FileUtils.rm_rf(data_dir)
  end

  nil
rescue Errno::ESRCH, Errno::ENOENT => e
  puts e
rescue StandardError => e
  raise e
end

.switch_exit_node(opts = {}) ⇒ Object

Supported Method Parameters

PWN::Plugins::Tor.switch_exit_node(

tor_obj: 'required - tor_obj returned from #start method',
response_timeout: 'optional - float in seconds to timeout (default: 3.0)'

)



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# File 'lib/pwn/plugins/tor.rb', line 192

public_class_method def self.switch_exit_node(opts = {})
  tor_obj = opts[:tor_obj]
  response_timeout = opts[:response_timeout]
  tor_control_cmd(
    tor_obj: tor_obj,
    cmd: 'SIGNAL NEWNYM',
    response_timeout: response_timeout
  )
rescue StandardError => e
  raise e
end