#
# Copyright (c) 2006-2020 Wade Alcorn - wade@bindshell.net
# Browser Exploitation Framework (BeEF) - http://beefproject.com
# See the file 'doc/COPYING' for copying permission
#
module BeEF
  module Extension
    module Xssrays

      class Handler < BeEF::Core::Router::Router

        XS = BeEF::Core::Models::Xssraysscan
        XD = BeEF::Core::Models::Xssraysdetail
        HB = BeEF::Core::Models::HookedBrowser

        get '/' do
          # verify if the request contains the hook token
          # raise an error if it's null or not found in the DB
          beef_hook = params[:hbsess] || nil

          if beef_hook.nil? || HB.where(:session => beef_hook).first.nil?
            print_error "[XSSRAYS] Invalid beef hook ID: the hooked browser cannot be found in the database"
            return
          end

          # verify the specified ray ID is valid
          rays_scan_id = params[:raysid] || nil
          if rays_scan_id.nil? || !BeEF::Filters::nums_only?(rays_scan_id)
            print_error "[XSSRAYS] Invalid ray ID"
            return
          end

          case params[:action]
          when 'ray'
            # we received a ray
            parse_rays(rays_scan_id)
          when 'finish'
            # we received a notification for finishing the scan
            finalize_scan(rays_scan_id)
          else
            # invalid action
            print_error "[XSSRAYS] Invalid action"
            return
          end

        headers 'Pragma' => 'no-cache',
                'Cache-Control' => 'no-cache',
                'Expires' => '0',
                'Access-Control-Allow-Origin' => '*',
                'Access-Control-Allow-Methods' => 'POST,GET'

        end

        # parse incoming rays: rays are verified XSS, as the attack vector is calling back BeEF when executed.
        def parse_rays(rays_scan_id)
          xssrays_scan = XS.find(rays_scan_id)
          hooked_browser = HB.where(:session => params[:hbsess]).first

          if xssrays_scan.nil?
            print_error "[XSSRAYS] Invalid scan"
            return
          end

          xssrays_detail = XD.new(
              :hooked_browser_id => hooked_browser.session,
              :vector_name => params[:n],
              :vector_method => params[:m],
              :vector_poc => params[:p],
              :xssraysscan_id => xssrays_scan.id
          )
          xssrays_detail.save

          print_info("[XSSRAYS] Scan id [#{xssrays_scan.id}] received ray [ip:#{hooked_browser.ip}], hooked domain [#{hooked_browser.domain}]")
          print_debug("[XSSRAYS] Ray info: \n #{request.query_string}")
        end

        # finalize the XssRays scan marking the scan as finished in the db
        def finalize_scan(rays_scan_id)
          xssrays_scan = BeEF::Core::Models::Xssraysscan.find(rays_scan_id)

          if xssrays_scan.nil?
            print_error "[XSSRAYS] Invalid scan"
            return
          end

          xssrays_scan.update(:is_finished => true, :scan_finish => Time.now)
          print_info("[XSSRAYS] Scan id [#{xssrays_scan.id}] finished at [#{xssrays_scan.scan_finish}]")
        end
      end
    end
  end
end
