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module Msf
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  Aggregator_yaml = "#{Msf::Config.config_directory}/aggregator.yaml".freeze # location of the aggregator.yml containing saved aggregator creds
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  # This plugin provides management and interaction with an external session aggregator.
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  class Plugin::Aggregator < Msf::Plugin
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    class AggregatorCommandDispatcher
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      include Msf::Ui::Console::CommandDispatcher
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      @response_queue = []
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      def name
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        'Aggregator'
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      end
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      def commands
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        {
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          'aggregator_connect' => 'Connect to a running Aggregator instance ( host[:port] )',
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          'aggregator_save' => 'Save connection details to an Aggregator instance',
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          'aggregator_disconnect' => 'Disconnect from an active Aggregator instance',
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          'aggregator_addresses' => 'List all remote ip addresses available for ingress',
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          'aggregator_cables' => 'List all remote listeners for sessions',
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          'aggregator_cable_add' => 'Setup remote https listener for sessions',
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          'aggregator_cable_remove' => 'Stop remote listener for sessions',
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          'aggregator_default_forward' => 'forward a unlisted/unhandled sessions to a specified listener',
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          'aggregator_sessions' => 'List all remote sessions currently available from the Aggregator instance',
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          'aggregator_session_forward' => 'forward a session to a specified listener',
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          'aggregator_session_park' => 'Park an existing session on the Aggregator instance'
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        }
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      end
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      def aggregator_verify
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        if !@aggregator
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          print_error("No active Aggregator instance has been configured, please use 'aggregator_connect'")
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          return false
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        end
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        true
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      end
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      def usage(*lines)
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        print_status('Usage: ')
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        lines.each do |line|
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          print_status("       #{line}")
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        end
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      end
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      def usage_save
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        usage('aggregator_save')
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      end
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      def usage_connect
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        usage('aggregator_connect host[:port]',
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              ' -OR- ',
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              'aggregator_connect host port')
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      end
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      def usage_cable_add
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        usage('aggregator_cable_add host:port [certificate]',
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              ' -OR- ',
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              'aggregator_cable_add host port [certificate]')
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      end
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      def usage_cable_remove
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        usage('aggregator_cable_remove host:port',
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              ' -OR- ',
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              'aggregator_cable_remove host port')
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      end
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      def usage_session_forward
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        usage('aggregator_session_forward remote_id')
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      end
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      def usage_default_forward
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        usage('aggregator_session_forward')
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      end
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      def show_session(details, _target, local_id)
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        status = pad_space("  #{local_id}", 4)
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        status += "  #{details['ID']}"
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        status = pad_space(status, 15)
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        status += '  meterpreter '
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        status += "#{guess_target_platform(details['OS'])} "
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        status = pad_space(status, 43)
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        status += "#{details['USER']} @ #{details['HOSTNAME']} "
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        status = pad_space(status, 64)
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        status += "#{details['LOCAL_SOCKET']} -> #{details['REMOTE_SOCKET']}"
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        print_status status
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      end
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      def show_session_detailed(details, target, local_id)
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        print_status "\t Remote ID: #{details['ID']}"
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        print_status "\t      Type: meterpreter #{guess_target_platform(details['OS'])}"
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        print_status "\t      Info: #{details['USER']} @ #{details['HOSTNAME']}"
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        print_status "\t    Tunnel: #{details['LOCAL_SOCKET']} -> #{details['REMOTE_SOCKET']}"
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        print_status "\t       Via: exploit/multi/handler"
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        print_status "\t      UUID: #{details['UUID']}"
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        print_status "\t MachineID: #{details['MachineID']}"
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        print_status "\t   CheckIn: #{details['LAST_SEEN'].to_i}s ago" unless details['LAST_SEEN'].nil?
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        print_status "\tRegistered: Not Yet Implemented"
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        print_status "\t   Forward: #{target}"
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        print_status "\tSession ID: #{local_id}" unless local_id.nil?
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        print_status ''
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      end
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      def cmd_aggregator_save(*args)
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        # if we are logged in, save session details to aggregator.yaml
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        if !args.empty? || args[0] == '-h'
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          usage_save
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          return
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        end
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        if args[0]
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          usage_save
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          return
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        end
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        group = 'default'
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        if (@host && !@host.empty?) && (@port && !@port.empty? && @port.to_i > 0)
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          config = { group.to_s => { 'server' => @host, 'port' => @port } }
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          ::File.open(Aggregator_yaml.to_s, 'wb') { |f| f.puts YAML.dump(config) }
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          print_good("#{Aggregator_yaml} created.")
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        else
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          print_error('Missing server/port - reconnect and then try again.')
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          return
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        end
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      end
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      def cmd_aggregator_connect(*args)
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        if !args[0] && ::File.readable?(Aggregator_yaml.to_s)
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          lconfig = YAML.load_file(Aggregator_yaml.to_s)
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          @host = lconfig['default']['server']
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          @port = lconfig['default']['port']
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          aggregator_login
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          return
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        end
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        if args.empty? || args[0].empty? || args[0] == '-h'
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          usage_connect
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          return
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        end
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        @host = @port = @sslv = nil
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        case args.length
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        when 1
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          @host, @port = args[0].split(':', 2)
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          @port ||= '2447'
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        when 2
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          @host, @port = args
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        else
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          usage_connect
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          return
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        end
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        aggregator_login
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      end
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      def cmd_aggregator_sessions(*args)
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        case args.length
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        when 0
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          is_detailed = false
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        when 1
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          unless args[0] == '-v'
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            usage_sessions
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            return
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          end
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          is_detailed = true
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        else
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          usage_sessions
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          return
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        end
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        return unless aggregator_verify
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        sessions_list = @aggregator.sessions
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        return if sessions_list.nil?
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        session_map = {}
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        # get details for each session and print in format of sessions -v
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        sessions_list.each do |session|
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          session_id, target = session
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          details = @aggregator.session_details(session_id)
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          local_id = nil
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          framework.sessions.each_pair do |key, value|
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            next unless value.conn_id == session_id
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            local_id = key
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          end
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          # filter session that do not have details as forwarding options (this may change later)
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          next unless details && details['ID']
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          session_map[details['ID']] = [details, target, local_id]
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        end
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        print_status('Remote sessions')
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        print_status('===============')
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        print_status('')
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        if session_map.empty?
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          print_status('No remote sessions.')
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        else
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          unless is_detailed
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            print_status('  Id  Remote Id  Type                      Information          Connection')
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            print_status('  --  ---------  ----                      -----------          ----------')
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          end
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          session_map.keys.sort.each do |key|
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            details, target, local_id = session_map[key]
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            if is_detailed
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              show_session_detailed(details, target, local_id)
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            else
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              show_session(details, target, local_id)
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            end
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          end
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        end
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      end
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      def cmd_aggregator_addresses(*_args)
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        return if !aggregator_verify
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        address_list = @aggregator.available_addresses
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        return if address_list.nil?
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        print_status('Remote addresses found:')
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        address_list.each do |addr|
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          print_status("    #{addr}")
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        end
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      end
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      def cmd_aggregator_cable_add(*args)
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        host, port, certificate = nil
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        case args.length
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        when 1
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          host, port = args[0].split(':', 2)
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        when 2
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          host, port = args[0].split(':', 2)
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          if port.nil?
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            port = args[1]
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          else
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            certificate = args[1]
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          end
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        when 3
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          host, port, certificate = args
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        else
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          usage_cable_add
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          return
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        end
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        if !aggregator_verify || args.empty? || args[0] == '-h' || \
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           port.nil? || port.to_i <= 0
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          usage_cable_add
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          return
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        end
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        certificate = File.new(certificate).read if certificate && File.exist?(certificate)
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        @aggregator.add_cable(Metasploit::Aggregator::Cable::HTTPS, host, port, certificate)
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      end
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      def cmd_aggregator_cables(*_args)
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        return if !aggregator_verify
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        res = @aggregator.cables
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        print_status('Remote Cables:')
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        res.each do |k|
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          print_status("    #{k}")
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        end
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      end
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      def cmd_aggregator_cable_remove(*args)
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        case args.length
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        when 1
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          host, port = args[0].split(':', 2)
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        when 2
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          host, port = args
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        end
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        if !aggregator_verify || args.empty? || args[0] == '-h' || host.nil?
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          usage_cable_remove
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          return
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        end
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        @aggregator.remove_cable(host, port)
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      end
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      def cmd_aggregator_session_park(*args)
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        return if !aggregator_verify
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        case args.length
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        when 1
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          session_id = args[0]
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          s = framework.sessions.get(session_id)
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          if s.nil?
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            print_status("#{session_id} is not a valid session.")
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          elsif @aggregator.sessions.keys.include? s.conn_id
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            @aggregator.release_session(s.conn_id)
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            framework.sessions.deregister(s)
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          else
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            # TODO: determine if we can add a transport and route with the
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            # aggregator. For now, just report action not taken.
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            print_status("#{session_id} does not originate from the aggregator connection.")
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          end
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        else
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          usage('aggregator_session_park session_id')
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          return
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        end
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      end
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      def cmd_aggregator_default_forward(*_args)
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        return if !aggregator_verify
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        @aggregator.register_default(@aggregator.uuid, nil)
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      end
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      def cmd_aggregator_session_forward(*args)
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        return if !aggregator_verify
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        remote_id = nil
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        case args.length
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        when 1
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          remote_id = args[0]
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        else
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          usage_session_forward
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          return
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        end
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        # find session with ID matching request
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        @aggregator.sessions.each do |session|
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          session_uri, _target = session
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          details = @aggregator.session_details(session_uri)
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          next unless details['ID'] == remote_id
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          return @aggregator.obtain_session(session_uri, @aggregator.uuid)
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        end
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        print_error("#{remote_id} was not found.")
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      end
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      def cmd_aggregator_disconnect(*_args)
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        if @aggregator && @aggregator.available?
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          # check if this connection is the default forward
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          @aggregator.register_default(nil, nil) if @aggregator.default == @aggregator.uuid
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          # now check for any specifically forwarded sessions
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          local_sessions_by_id = {}
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          framework.sessions.each_pair do |_id, s|
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            local_sessions_by_id[s.conn_id] = s
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          end
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          sessions = @aggregator.sessions
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          unless sessions.nil?
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            sessions.each_pair do |session, console|
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              next unless local_sessions_by_id.keys.include?(session)
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              if console == @aggregator.uuid
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                # park each session locally addressed
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                cmd_aggregator_session_park(framework.sessions.key(local_sessions_by_id[session]))
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              else
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                # simple disconnect session that were from the default forward
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                framework.sessions.deregister(local_sessions_by_id[session])
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              end
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            end
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          end
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        end
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        @aggregator.stop if @aggregator
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        if @payload_job_ids
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          @payload_job_ids.each do |id|
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            framework.jobs.stop_job(id)
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          end
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          @payload_job_ids = nil
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        end
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        @aggregator = nil
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      end
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      def aggregator_login
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        if !((@host && !@host.empty?) && (@port && !@port.empty? && @port.to_i > 0))
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          usage_connect
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          return
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        end
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        if (@host != 'localhost') && (@host != '127.0.0.1')
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          print_error('Warning: SSL connections are not verified in this release, it is possible for an attacker')
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          print_error('         with the ability to man-in-the-middle the Aggregator traffic to capture the Aggregator')
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          print_error('         traffic, if you are running this on an untrusted network.')
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          return
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        end
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        # Wrap this so a duplicate session does not prevent access
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        begin
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          cmd_aggregator_disconnect
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        rescue ::Interrupt => e
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          raise e
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        rescue ::Exception
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        end
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        begin
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          print_status("Connecting to Aggregator instance at #{@host}:#{@port}...")
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          @aggregator = Metasploit::Aggregator::ServerProxy.new(@host, @port)
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        end
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        aggregator_compatibility_check
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        unless @payload_job_ids
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          @payload_job_ids = []
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          @my_io = local_handler
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        end
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        @aggregator.register_response_channel(@my_io)
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        @aggregator
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      end
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      def aggregator_compatibility_check
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        false if @aggregator.nil?
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        unless @aggregator.available?
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          print_error("Connection to aggregator @ #{@host}:#{@port} is unavailable.")
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          cmd_aggregator_disconnect
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        end
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      end
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      def local_handler
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        # get a random ephemeral port
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        server = TCPServer.new('127.0.0.1', 0)
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        port = server.addr[1]
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        server.close
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        multi_handler = framework.exploits.create('multi/handler')
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        multi_handler.datastore['LHOST'] = '127.0.0.1'
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        # multi_handler.datastore['PAYLOAD']              = "multi/meterpreter/reverse_https"
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        multi_handler.datastore['PAYLOAD'] = 'multi/meterpreter/reverse_http'
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        multi_handler.datastore['LPORT'] = port.to_s
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        # %w(DebugOptions PrependMigrate PrependMigrateProc
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        #  InitialAutoRunScript AutoRunScript CAMPAIGN_ID HandlerSSLCert
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        #  StagerVerifySSLCert PayloadUUIDTracking PayloadUUIDName
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        #  IgnoreUnknownPayloads SessionRetryTotal SessionRetryWait
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        #  SessionExpirationTimeout SessionCommunicationTimeout).each do |opt|
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        #   multi_handler.datastore[opt] = datastore[opt] if datastore[opt]
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        # end
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        multi_handler.datastore['ExitOnSession'] = false
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        multi_handler.datastore['EXITFUNC'] = 'thread'
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        multi_handler.exploit_simple(
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          'LocalInput' => nil,
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          'LocalOutput' => nil,
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          'Payload' => multi_handler.datastore['PAYLOAD'],
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          'RunAsJob' => true
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        )
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        @payload_job_ids << multi_handler.job_id
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        # requester = Metasploit::Aggregator::Http::SslRequester.new(multi_handler.datastore['LHOST'], multi_handler.datastore['LPORT'])
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        requester = Metasploit::Aggregator::Http::Requester.new(multi_handler.datastore['LHOST'], multi_handler.datastore['LPORT'])
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        requester
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      end
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      # borrowed from Msf::Sessions::Meterpreter for now
451
      def guess_target_platform(os)
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        case os
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        when /windows/i
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          Msf::Module::Platform::Windows.realname.downcase
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        when /darwin/i
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          Msf::Module::Platform::OSX.realname.downcase
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        when /mac os ?x/i
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          # this happens with java on OSX (for real!)
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          Msf::Module::Platform::OSX.realname.downcase
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        when /freebsd/i
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          Msf::Module::Platform::FreeBSD.realname.downcase
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        when /openbsd/i, /netbsd/i
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          Msf::Module::Platform::BSD.realname.downcase
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        else
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          Msf::Module::Platform::Linux.realname.downcase
466
        end
467
      end
468

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      def pad_space(status, length)
470
        status << ' ' while status.length < length
471
        status
472
      end
473

474
      private :guess_target_platform
475
      private :aggregator_login
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      private :aggregator_compatibility_check
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      private :aggregator_verify
478
      private :local_handler
479
      private :pad_space
480
      private :show_session
481
      private :show_session_detailed
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    end
483

484
    #
485
    # Plugin initialization
486
    #
487

488
    def initialize(framework, opts)
489
      super
490

491
      #
492
      # Require the metasploit/aggregator gem, but fail nicely if it's not there.
493
      #
494
      begin
495
        require 'metasploit/aggregator'
496
      rescue LoadError
497
        raise 'WARNING: metasploit/aggregator is not available for now.'
498
      end
499

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      add_console_dispatcher(AggregatorCommandDispatcher)
501
      print_status('Aggregator interaction has been enabled')
502
    end
503

504
    def cleanup
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      remove_console_dispatcher('Aggregator')
506
    end
507

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    def name
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      'aggregator'
510
    end
511

512
    def desc
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      'Interacts with the external Session Aggregator'
514
    end
515
  end
516
end
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