| |
| """The default plugin for parsing OLE Compound Files (OLECF).""" |
|
|
| from dfdatetime import filetime as dfdatetime_filetime |
| from dfdatetime import semantic_time as dfdatetime_semantic_time |
|
|
| from plaso.containers import events |
| from plaso.containers import time_events |
| from plaso.lib import definitions |
| from plaso.parsers import olecf |
| from plaso.parsers.olecf_plugins import interface |
|
|
|
|
| class OLECFItemEventData(events.EventData): |
| """OLECF item event data. |
| |
| Attributes: |
| name (str): name of the OLE Compound File item. |
| size (int): data size of the OLE Compound File item. |
| """ |
|
|
| DATA_TYPE = 'olecf:item' |
|
|
| def __init__(self): |
| """Initializes event data.""" |
| super(OLECFItemEventData, self).__init__(data_type=self.DATA_TYPE) |
| self.name = None |
| self.size = None |
|
|
|
|
| class DefaultOLECFPlugin(interface.OLECFPlugin): |
| """Class to define the default OLECF file plugin.""" |
|
|
| NAME = 'olecf_default' |
| DATA_FORMAT = 'Generic OLE compound item' |
|
|
| def _ParseItem(self, parser_mediator, olecf_item): |
| """Parses an OLECF item. |
| |
| Args: |
| parser_mediator (ParserMediator): mediates interactions between parsers |
| and other components, such as storage and dfvfs. |
| olecf_item (pyolecf.item): OLECF item. |
| |
| Returns: |
| bool: True if an event was produced. |
| """ |
| result = False |
|
|
| event_data = OLECFItemEventData() |
| event_data.name = olecf_item.name |
| event_data.size = olecf_item.size |
|
|
| creation_time, modification_time = self._GetTimestamps(olecf_item) |
| if creation_time: |
| date_time = dfdatetime_filetime.Filetime(timestamp=creation_time) |
| event = time_events.DateTimeValuesEvent( |
| date_time, definitions.TIME_DESCRIPTION_CREATION) |
| parser_mediator.ProduceEventWithEventData(event, event_data) |
| result = True |
|
|
| if modification_time: |
| date_time = dfdatetime_filetime.Filetime(timestamp=modification_time) |
| event = time_events.DateTimeValuesEvent( |
| date_time, definitions.TIME_DESCRIPTION_MODIFICATION) |
| parser_mediator.ProduceEventWithEventData(event, event_data) |
| result = True |
|
|
| for sub_item in olecf_item.sub_items: |
| if self._ParseItem(parser_mediator, sub_item): |
| result = True |
|
|
| return result |
|
|
| def Process(self, parser_mediator, root_item=None, **kwargs): |
| """Extracts events from an OLECF file. |
| |
| Args: |
| parser_mediator (ParserMediator): mediates interactions between parsers |
| and other components, such as storage and dfvfs. |
| root_item (Optional[pyolecf.item]): root item of the OLECF file. |
| |
| Raises: |
| ValueError: If the root item is not set. |
| """ |
| |
| super(DefaultOLECFPlugin, self).Process(parser_mediator, **kwargs) |
|
|
| if not root_item: |
| raise ValueError('Root item not set.') |
|
|
| if not self._ParseItem(parser_mediator, root_item): |
| event_data = OLECFItemEventData() |
| event_data.name = root_item.name |
| event_data.size = root_item.size |
|
|
| |
| date_time = dfdatetime_semantic_time.NotSet() |
| event = time_events.DateTimeValuesEvent( |
| date_time, definitions.TIME_DESCRIPTION_CREATION) |
| parser_mediator.ProduceEventWithEventData(event, event_data) |
|
|
|
|
| olecf.OLECFParser.RegisterPlugin(DefaultOLECFPlugin) |
|
|
