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# -*- coding: utf-8 -*-
"""Analysis plugin related functions and classes for testing."""
from plaso.analysis import mediator as analysis_mediator
from plaso.containers import events
from plaso.engine import timeliner
from plaso.parsers import interface as parsers_interface
from plaso.parsers import mediator as parsers_mediator
from plaso.storage.fake import writer as fake_writer
from tests import test_lib as shared_test_lib
from tests.containers import test_lib as containers_test_lib
class AnalysisPluginTestCase(shared_test_lib.BaseTestCase):
"""The unit test case for an analysis plugin."""
def _AnalyzeEvents(
self, event_values_list, plugin, user_accounts=None):
"""Analyzes events using the analysis plugin.
Args:
event_values_list (list[dict[str, object]]): list of event values.
plugin (AnalysisPlugin): plugin.
user_accounts (Optional[list[UserAccountArtifact]]): user accounts.
Returns:
FakeStorageWriter: storage writer.
"""
storage_writer = fake_writer.FakeStorageWriter()
storage_writer.Open()
for user_account in user_accounts or []:
storage_writer.AddAttributeContainer(user_account)
test_events = []
for event, event_data, event_data_stream in (
containers_test_lib.CreateEventsFromValues(event_values_list)):
storage_writer.AddAttributeContainer(event_data_stream)
event_data.SetEventDataStreamIdentifier(event_data_stream.GetIdentifier())
storage_writer.AddAttributeContainer(event_data)
event.SetEventDataIdentifier(event_data.GetIdentifier())
storage_writer.AddAttributeContainer(event)
test_events.append((event, event_data, event_data_stream))
mediator = analysis_mediator.AnalysisMediator(
user_accounts=user_accounts)
mediator.SetStorageWriter(storage_writer)
for event, event_data, event_data_stream in test_events:
plugin.ExamineEvent(mediator, event, event_data, event_data_stream)
analysis_report = plugin.CompileReport(mediator)
storage_writer.AddAttributeContainer(analysis_report)
return storage_writer
def _ParseAndAnalyzeFile(self, path_segments, parser, plugin):
"""Parses and analyzes a file using the parser and analysis plugin.
Args:
path_segments (list[str]): path segments inside the test data directory.
parser (BaseParser): parser.
plugin (AnalysisPlugin): plugin.
Returns:
FakeStorageWriter: storage writer.
Raises:
SkipTest: if the path inside the test data directory does not exist and
the test should be skipped.
"""
storage_writer = self._ParseFile(path_segments, parser)
mediator = analysis_mediator.AnalysisMediator()
mediator.SetStorageWriter(storage_writer)
for event in storage_writer.GetSortedEvents():
event_data = None
event_data_identifier = event.GetEventDataIdentifier()
if event_data_identifier:
event_data = storage_writer.GetAttributeContainerByIdentifier(
events.EventData.CONTAINER_TYPE, event_data_identifier)
event_data_stream = None
if event_data:
event_data_stream_identifier = event_data.GetEventDataStreamIdentifier()
if event_data_stream_identifier:
event_data_stream = storage_writer.GetAttributeContainerByIdentifier(
events.EventDataStream.CONTAINER_TYPE,
event_data_stream_identifier)
plugin.ExamineEvent(mediator, event, event_data, event_data_stream)
analysis_report = plugin.CompileReport(mediator)
storage_writer.AddAttributeContainer(analysis_report)
return storage_writer
def _ParseFile(self, path_segments, parser):
"""Parses a file using the parser.
Args:
path_segments (list[str]): path segments inside the test data directory.
parser (BaseParser): parser.
Returns:
FakeStorageWriter: storage writer.
Raises:
SkipTest: if the path inside the test data directory does not exist and
the test should be skipped.
"""
parser_mediator = parsers_mediator.ParserMediator()
storage_writer = fake_writer.FakeStorageWriter()
storage_writer.Open()
parser_mediator.SetStorageWriter(storage_writer)
file_entry = self._GetTestFileEntry(path_segments)
parser_mediator.SetFileEntry(file_entry)
event_data_stream = events.EventDataStream()
parser_mediator.ProduceEventDataStream(event_data_stream)
if isinstance(parser, parsers_interface.FileEntryParser):
parser.Parse(parser_mediator)
elif isinstance(parser, parsers_interface.FileObjectParser):
file_object = file_entry.GetFileObject()
parser.Parse(parser_mediator, file_object)
else:
self.fail('Got unexpected parser type: {0!s}'.format(type(parser)))
self._ProcessEventData(storage_writer)
return storage_writer
def _ProcessEventData(self, storage_writer):
"""Generate events from event data.
Args:
storage_writer (StorageWriter): storage writer.
"""
event_data_timeliner = timeliner.EventDataTimeliner(
data_location=shared_test_lib.DATA_PATH)
event_data = storage_writer.GetFirstWrittenEventData()
while event_data:
event_data_stream_identifier = event_data.GetEventDataStreamIdentifier()
event_data_stream = None
if event_data_stream_identifier:
event_data_stream = storage_writer.GetAttributeContainerByIdentifier(
events.EventDataStream.CONTAINER_TYPE, event_data_stream_identifier)
event_data_timeliner.ProcessEventData(
storage_writer, event_data, event_data_stream)
event_data = storage_writer.GetNextWrittenEventData()
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