pattern_create.rb

begin
    msfbase = __FILE__
    while File.symlink?(msfbase)
      msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
    end
    
    $LOAD_PATH.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
    $LOAD_PATH.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']
    
    gem 'rex-text'
    
    require 'optparse'
    
    module PatternCreate
      class OptsConsole
        def self.parse(args)
          options = {}
          parser = OptionParser.new do |opt|
            opt.banner = "Usage: #{__FILE__} [options]\nExample: #{__FILE__} -l 50 -s ABC,def,123\nAd1Ad2Ad3Ae1Ae2Ae3Af1Af2Af3Bd1Bd2Bd3Be1Be2Be3Bf1Bf"
            opt.separator ''
            opt.separator 'Options:'
            opt.on('-l', '--length <length>', Integer, "The length of the pattern") do |len|
              options[:length] = len
            end
    
            opt.on('-s', '--sets <ABC,def,123>', Array, "Custom Pattern Sets") do |sets|
              options[:sets] = sets
            end
    
            opt.on_tail('-h', '--help', 'Show this message') do
              $stdout.puts opt
              exit
            end
          end
    
          parser.parse!(args)
    
          if options.empty?
            raise OptionParser::MissingArgument, 'No options set, try -h for usage'
          elsif options[:length].nil? && options[:sets]
            raise OptionParser::MissingArgument, '-l <length> is required'
          end
    
          options[:sets] = nil unless options[:sets]
    
          options
        end
      end
    
      class Driver
        def initialize
          begin
            @opts = OptsConsole.parse(ARGV)
          rescue OptionParser::ParseError => e
            $stderr.puts "[x] #{e.message}"
            exit
          end
        end
    
        def run
          require 'rex/text'
    
          puts Rex::Text.pattern_create(@opts[:length], @opts[:sets])
        end
      end
    end
    
    if __FILE__ == $PROGRAM_NAME
      driver = PatternCreate::Driver.new
      begin
        driver.run
      rescue ::StandardError => e
        $stderr.puts "[x] #{e.class}: #{e.message}"
        $stderr.puts "[*] If necessary, please refer to framework.log for more details."
      end
    end
    rescue SignalException => e
      puts("Aborted! #{e}")
    end