#!/usr/bin/env ruby

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

# This script lists each payload module along with its length
# NOTE: No encoding or BadChar handling is performed
#

msfbase = __FILE__
while File.symlink?(msfbase)
  msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
end

$:.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
require 'msfenv'

$:.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']

require 'rex'
require 'msf/ui'
require 'msf/base'

Indent = '    '

# Initialize the simplified framework instance.
$framework = Msf::Simple::Framework.create(
  :module_types => [ Msf::MODULE_PAYLOAD ],
  'DisableDatabase' => true
)

# Process special var/val pairs...
Msf::Ui::Common.process_cli_arguments($framework, ARGV)

options = ARGV.join(',')

tbl = Rex::Text::Table.new(
  'Header'  => 'Payload Lengths',
  'Indent'  => Indent.length,
  'Columns' => [ 'Payload', 'Length' ]
)

enc = nil

$framework.payloads.each_module { |payload_name, mod|

  len = 'Error: Unknown error!'

  begin
    # Create the payload instance
    payload = mod.new
    raise "Invalid payload" if not payload

    # Set the variables from the cmd line
    payload.datastore.import_options_from_s(options)

    # Skip non-specified architectures
    if (ds_arch = payload.datastore['ARCH'])
      next if not payload.arch?(ds_arch)
    end

    # Skip non-specified platforms
    if (ds_plat = payload.datastore['PLATFORM'])
      ds_plat = Msf::Module::PlatformList.transform(ds_plat)
      next if not payload.platform.supports?(ds_plat)
    end

    len = payload.size
    if len > 0
      len = len.to_s
    else
      len = "Error: Empty payload"
    end
  rescue
    len = "Error: #{$!}"
  end

  tbl << [ payload_name, len ]
}

puts tbl.to_s