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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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require 'patch_finder/core/helper'
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require 'patch_finder/msu'
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require 'optparse'
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class PatchFinderBin
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  include PatchFinder::Helper
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  attr_reader :args
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  def get_parsed_options
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    options = {}
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    parser = OptionParser.new do |opt|
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      opt.separator ''
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      opt.separator 'Specific options:'
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      opt.on('-q', '--query <keyword>', 'Find advisories including this keyword') do |v|
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        options[:keyword] = v
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      end
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      opt.on('-s', '--search-engine <engine>', '(Optional) The type of search engine to use (Technet or Google). Default: Technet') do |v|
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        case v.to_s
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        when /^google$/i
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          options[:search_engine] = :google
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        when /^technet$/i
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          options[:search_engine] = :technet
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        else
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          fail OptionParser::InvalidOption, "Invalid search engine: #{v}"
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        end
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      end
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      opt.on('-r', '--regex <string>', '(Optional) Specify what type of links you want') do |v|
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        options[:regex] = v
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      end
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      opt.on('--apikey <key>', '(Optional) Google API key.') do |v|
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        options[:google_api_key] = v
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      end
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      opt.on('--cx <id>', '(Optional) Google search engine ID.') do |v|
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        options[:google_search_engine_id] = v
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      end
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      opt.on('-d', '--dir <string>', '(Optional) The directory to save the patches') do |v|
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        unless File.directory?(v)
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          fail OptionParser::InvalidOption, "Directory not found: #{v}"
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        end
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        options[:destdir] = v
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      end
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      opt.on_tail('-h', '--help', 'Show this message') do
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        $stderr.puts opt
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        exit
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      end
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    end
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    parser.parse!
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    if options.empty?
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      fail OptionParser::MissingArgument, 'No options set, try -h for usage'
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    elsif options[:keyword].nil? || options[:keyword].empty?
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      fail OptionParser::MissingArgument, '-q is required'
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    end
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    unless options[:search_engine]
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      options[:search_engine] = :technet
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    end
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    if options[:search_engine] == :google
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      if options[:google_api_key].nil? || options[:google_search_engine_id].empty?
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        fail OptionParser::MissingArgument, 'No API key set for Google'
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      elsif options[:google_search_engine_id].nil? || options[:google_search_engine_id].empty?
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        fail OptionParser::MissingArgument, 'No search engine ID set for Google'
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      end
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    end
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    options
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  end
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  def initialize
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    @args = get_parsed_options
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  rescue OptionParser::InvalidOption, OptionParser::MissingArgument => e
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    print_error(e.message)
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    exit
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  end
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  def main
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    cli = PatchFinder::MSU.new(verbose: true)
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    links = cli.find_msu_download_links(args)
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    if args[:destdir]
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      print_status("Download links found: #{links.length}")
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      print_status('Downloading files, please wait...')
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      download_files(links, args[:destdir])
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    else
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      print_status('Download links found:')
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      print_line(links * "\n")
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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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  bin = PatchFinderBin.new
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  bin.main
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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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