text: # -*- coding: utf-8 -*-
  """Plug-in to format the Services and Drivers key with Start and Type values."""
  
  from __future__ import unicode_literals
  
  from plaso.containers import windows_events
  from plaso.containers import time_events
  from plaso.lib import definitions
  from plaso.parsers import winreg
  from plaso.parsers.winreg_plugins import interface
  
  
  class ServicesPlugin(interface.WindowsRegistryPlugin):
    """Plug-in to format the Services and Drivers keys having Type and Start."""
  
    NAME = 'windows_services'
    DESCRIPTION = 'Parser for services and drivers Registry data.'
  
    # TODO: use a key path prefix match here. Might be more efficient.
    # HKEY_LOCAL_MACHINE\\System\\CurrentControlSet\\Services
    FILTERS = frozenset([
        interface.WindowsRegistryKeyWithValuesFilter([
            'Start', 'Type'])])
  
    URLS = ['http://support.microsoft.com/kb/103000']
  
    def GetServiceDll(self, key):
      """Get the Service DLL for a service, if it exists.
  
      Checks for a ServiceDLL for in the Parameters subkey of a service key in
      the Registry.
  
      Args:
        key (dfwinreg.WinRegistryKey): a Windows Registry key.
  
      Returns:
        str: path of the service DLL or None.
      """
      parameters_key = key.GetSubkeyByName('Parameters')
      if not parameters_key:
        return None
  
      service_dll = parameters_key.GetValueByName('ServiceDll')
      if not service_dll:
        return None
  
      return service_dll.GetDataAsObject()
  
    # pylint 1.9.3 wants a docstring for kwargs, but this is not useful to add.
    # pylint: disable=missing-param-doc
    def ExtractEvents(self, parser_mediator, registry_key, **kwargs):
      """Extracts events from a Windows Registry key.
  
      Args:
        parser_mediator (ParserMediator): mediates interactions between parsers
            and other components, such as storage and dfvfs.
        registry_key (dfwinreg.WinRegistryKey): Windows Registry key.
      """
      values_dict = {}
  
      service_type_value = registry_key.GetValueByName('Type')
      service_start_value = registry_key.GetValueByName('Start')
  
      # Grab the ServiceDLL value if it exists.
      if service_type_value and service_start_value:
        service_dll = self.GetServiceDll(registry_key)
        if service_dll:
          values_dict['ServiceDll'] = service_dll
  
        # Gather all the other string and integer values and insert as they are.
        for value in registry_key.GetValues():
          if not value.name:
            continue
          if value.name not in values_dict:
            if value.DataIsString() or value.DataIsInteger():
              values_dict[value.name] = value.GetDataAsObject()
            elif value.DataIsMultiString():
              values_dict[value.name] = ', '.join(value.GetDataAsObject())
  
        # Create a specific service event, so that we can recognize and expand
        # certain values when we're outputting the event.
        event_data = windows_events.WindowsRegistryServiceEventData()
        event_data.key_path = registry_key.path
        event_data.offset = registry_key.offset
        event_data.regvalue = values_dict
        event_data.urls = self.URLS
  
        event = time_events.DateTimeValuesEvent(
            registry_key.last_written_time, definitions.TIME_DESCRIPTION_WRITTEN)
        parser_mediator.ProduceEventWithEventData(event, event_data)
  
  
  winreg.WinRegistryParser.RegisterPlugin(ServicesPlugin)
  