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#!/usr/bin/env ruby
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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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begin
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msfbase = __FILE__
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while File.symlink?(msfbase)
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  msfbase = File.expand_path(File.readlink(msfbase), File.dirname(msfbase))
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end
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$LOAD_PATH.unshift(File.expand_path(File.join(File.dirname(msfbase), '..', '..', 'lib')))
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$LOAD_PATH.unshift(ENV['MSF_LOCAL_LIB']) if ENV['MSF_LOCAL_LIB']
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gem 'rex-text'
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require 'optparse'
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module PatternCreate
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  class OptsConsole
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    def self.parse(args)
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      options = {}
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      parser = OptionParser.new do |opt|
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        opt.banner = "Usage: #{__FILE__} [options]\nExample: #{__FILE__} -l 50 -s ABC,def,123\nAd1Ad2Ad3Ae1Ae2Ae3Af1Af2Af3Bd1Bd2Bd3Be1Be2Be3Bf1Bf"
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        opt.separator ''
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        opt.separator 'Options:'
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        opt.on('-l', '--length <length>', Integer, "The length of the pattern") do |len|
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          options[:length] = len
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        end
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        opt.on('-s', '--sets <ABC,def,123>', Array, "Custom Pattern Sets") do |sets|
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          options[:sets] = sets
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        end
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        opt.on_tail('-h', '--help', 'Show this message') do
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          $stdout.puts opt
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          exit
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        end
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      end
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      parser.parse!(args)
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      if options.empty?
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        raise OptionParser::MissingArgument, 'No options set, try -h for usage'
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      elsif options[:length].nil? && options[:sets]
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        raise OptionParser::MissingArgument, '-l <length> is required'
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      end
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      options[:sets] = nil unless options[:sets]
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      options
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    end
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  end
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  class Driver
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    def initialize
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      begin
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        @opts = OptsConsole.parse(ARGV)
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      rescue OptionParser::ParseError => e
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        $stderr.puts "[x] #{e.message}"
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        exit
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      end
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    end
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    def run
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      require 'rex/text'
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      puts Rex::Text.pattern_create(@opts[:length], @opts[:sets])
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    end
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  end
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end
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if __FILE__ == $PROGRAM_NAME
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  driver = PatternCreate::Driver.new
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  begin
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    driver.run
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  rescue ::StandardError => e
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    $stderr.puts "[x] #{e.class}: #{e.message}"
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    $stderr.puts "[*] If necessary, please refer to framework.log for more details."
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  end
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end
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rescue SignalException => e
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  puts("Aborted! #{e}")
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end
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