114 lines
3.5 KiB
Python
114 lines
3.5 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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#
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# Copyright 2013 The Plaso Project Authors.
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# Please see the AUTHORS file for details on individual authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Formatter for Windows EventLog (EVT) files."""
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from plaso.lib import errors
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from plaso.formatters import interface
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class WinEvtFormatter(interface.ConditionalEventFormatter):
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"""Define the formatting for Windows EventLog (EVT) record."""
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DATA_TYPE = 'windows:evt:record'
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# TODO: add string representation of facility.
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FORMAT_STRING_PIECES = [
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u'[{event_identifier} /',
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u'0x{event_identifier:04x}]',
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u'Severity: {severity_string}',
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u'Record Number: {record_number}',
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u'Event Type: {event_type_string}',
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u'Event Category: {event_category}',
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u'Source Name: {source_name}',
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u'Computer Name: {computer_name}',
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u'Strings: {strings}']
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FORMAT_STRING_SHORT_PIECES = [
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u'[{event_identifier} /',
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u'0x{event_identifier:04x}]',
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u'Strings: {strings}']
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SOURCE_LONG = 'WinEVT'
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SOURCE_SHORT = 'EVT'
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# Mapping of the numeric event types to a descriptive string.
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_EVENT_TYPES = [
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u'Error event',
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u'Warning event',
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u'Information event',
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u'Success Audit event',
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u'Failure Audit event']
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_SEVERITY = [
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u'Success',
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u'Informational',
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u'Warning',
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u'Error']
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def GetEventTypeString(self, event_type):
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"""Retrieves a string representation of the event type.
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Args:
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event_type: The numeric event type.
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Returns:
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An Unicode string containing a description of the event type.
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"""
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if event_type >= 0 and event_type < len(self._EVENT_TYPES):
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return self._EVENT_TYPES[event_type]
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return u'Unknown {0:d}'.format(event_type)
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def GetSeverityString(self, severity):
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"""Retrieves a string representation of the severity.
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Args:
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severity: The numeric severity.
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Returns:
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An Unicode string containing a description of the event type.
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"""
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if severity >= 0 and severity < len(self._SEVERITY):
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return self._SEVERITY[severity]
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return u'Unknown {0:d}'.format(severity)
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def GetMessages(self, event_object):
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"""Returns a list of messages extracted from an event object.
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Args:
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event_object: The event object (EventObject) containing the event
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specific data.
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Returns:
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A list that contains both the longer and shorter version of the message
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string.
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"""
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if self.DATA_TYPE != event_object.data_type:
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raise errors.WrongFormatter(u'Unsupported data type: {0:s}.'.format(
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event_object.data_type))
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# Update event object with the event type string.
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event_object.event_type_string = self.GetEventTypeString(
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event_object.event_type)
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# TODO: add string representation of facility.
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# Update event object with the severity string.
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event_object.severity_string = self.GetSeverityString(event_object.severity)
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return super(WinEvtFormatter, self).GetMessages(event_object)
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