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import textwrap
import pytest
import Evtx.Evtx as evtx
import Evtx.Nodes as e_nodes
from fixtures import *
try:
import lxml
no_lxml = False
except:
no_lxml = True
def test_parse_records(system):
'''
regression test demonstrating that all record metadata can be parsed.
Args:
system (bytes): the system.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(system, 0x0)
for i, chunk in enumerate(fh.chunks()):
for j, record in enumerate(chunk.records()):
assert record.magic() == 0x2a2a
def test_parse_records2(security):
'''
regression test demonstrating that all record metadata can be parsed.
Args:
security (bytes): the security.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(security, 0x0)
for i, chunk in enumerate(fh.chunks()):
for j, record in enumerate(chunk.records()):
assert record.magic() == 0x2a2a
def one(iterable):
'''
fetch a single element from the given iterable.
Args:
iterable (iterable): a sequence of things.
Returns:
object: the first thing in the sequence.
'''
for i in iterable:
return i
def extract_structure(node):
'''
given an evtx bxml node, generate a tree of all the nodes.
each node has:
- str: node type
- str: (optional) value
- list: (optional) children
Args:
node (evtx.Node): the root node.
Returns:
list: the tree representing the bxml structure.
'''
name = node.__class__.__name__
if isinstance(node, e_nodes.BXmlTypeNode):
# must go before is VariantTypeNode
value = None
elif isinstance(node, e_nodes.VariantTypeNode):
value = node.string()
elif isinstance(node, e_nodes.OpenStartElementNode):
value = node.tag_name()
elif isinstance(node, e_nodes.AttributeNode):
value = node.attribute_name().string()
else:
value = None
children = []
if isinstance(node, e_nodes.BXmlTypeNode):
children.append(extract_structure(node._root))
elif isinstance(node, e_nodes.TemplateInstanceNode) and node.is_resident_template():
children.append(extract_structure(node.template()))
children.extend(list(map(extract_structure, node.children())))
if isinstance(node, e_nodes.RootNode):
substitutions = list(map(extract_structure, node.substitutions()))
children.append(['Substitutions', None, substitutions])
if children:
return [name, value, children]
elif value:
return [name, value]
else:
return [name]
def test_parse_record(system):
'''
regression test demonstrating binary xml nodes getting parsed.
Args:
system (bytes): the system.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(system, 0x0)
chunk = one(fh.chunks())
record = one(chunk.records())
# generated by hand, but matches the output of extract_structure.
expected = \
['RootNode', None, [
['StreamStartNode'],
['TemplateInstanceNode', None, [
['TemplateNode', None, [
['StreamStartNode'],
['OpenStartElementNode', 'Event', [
['AttributeNode', 'xmlns', [
['ValueNode', None, [
['WstringTypeNode', 'http://schemas.microsoft.com/win/2004/08/events/event']]]]],
['CloseStartElementNode'],
['OpenStartElementNode', 'System', [
['CloseStartElementNode'],
['OpenStartElementNode', 'Provider', [
['AttributeNode', 'Name', [
['ValueNode', None, [
['WstringTypeNode', 'Microsoft-Windows-Eventlog']]]]],
['AttributeNode', 'Guid', [
['ValueNode', None, [
['WstringTypeNode', '{fc65ddd8-d6ef-4962-83d5-6e5cfe9ce148}']]]]],
['CloseEmptyElementNode']]],
['OpenStartElementNode', 'EventID', [
['AttributeNode', 'Qualifiers', [
['ConditionalSubstitutionNode']]],
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Version', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Level', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Task', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Opcode', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Keywords', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'TimeCreated', [
['AttributeNode', 'SystemTime', [
['ConditionalSubstitutionNode']]],
['CloseEmptyElementNode']]],
['OpenStartElementNode', 'EventRecordID', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'Correlation', [
['AttributeNode', 'ActivityID', [
['ConditionalSubstitutionNode']]],
['AttributeNode', 'RelatedActivityID', [
['ConditionalSubstitutionNode']]],
['CloseEmptyElementNode']]],
['OpenStartElementNode', 'Execution', [
['AttributeNode', 'ProcessID', [
['ConditionalSubstitutionNode']]],
['AttributeNode', 'ThreadID', [
['ConditionalSubstitutionNode']]],
['CloseEmptyElementNode']]],
['OpenStartElementNode', 'Channel', [
['CloseStartElementNode'],
['ValueNode', None, [
['WstringTypeNode', 'System']]],
['CloseElementNode']]],
['OpenStartElementNode', 'Computer', [
['CloseStartElementNode'],
['ValueNode', None, [
['WstringTypeNode', 'WKS-WIN764BITB.shieldbase.local']]],
['CloseElementNode']]],
['OpenStartElementNode', 'Security', [
['AttributeNode', 'UserID', [
['ConditionalSubstitutionNode']]],
['CloseEmptyElementNode']]],
['CloseElementNode']]],
['OpenStartElementNode', 'UserData', [
['CloseStartElementNode'],
['ConditionalSubstitutionNode'],
['CloseElementNode']]],
['CloseElementNode']]],
['EndOfStreamNode']]]]],
['Substitutions', None, [
['UnsignedByteTypeNode', '4'],
['UnsignedByteTypeNode', '0'],
['UnsignedWordTypeNode', '105'],
['UnsignedWordTypeNode', '105'],
['NullTypeNode'],
['Hex64TypeNode', '0x8000000000000000'],
['FiletimeTypeNode', '2012-03-14 04:17:43.354563'],
['NullTypeNode'],
['UnsignedDwordTypeNode', '820'],
['UnsignedDwordTypeNode', '2868'],
['UnsignedQwordTypeNode', '12049'],
['UnsignedByteTypeNode', '0'],
['NullTypeNode'],
['NullTypeNode'],
['NullTypeNode'],
['NullTypeNode'],
['NullTypeNode'],
['NullTypeNode'],
['NullTypeNode'],
['BXmlTypeNode', None, [
['RootNode', None, [
['StreamStartNode'],
['TemplateInstanceNode', None, [
['TemplateNode', None, [
['StreamStartNode'],
['OpenStartElementNode', 'AutoBackup', [
['AttributeNode', 'xmlns:auto-ns3', [
['ValueNode', None, [
['WstringTypeNode', 'http://schemas.microsoft.com/win/2004/08/events']]]]],
['AttributeNode', 'xmlns', [
['ValueNode', None, [
['WstringTypeNode', 'http://manifests.microsoft.com/win/2004/08/windows/eventlog']]]]],
['CloseStartElementNode'],
['OpenStartElementNode', 'Channel', [
['CloseStartElementNode'],
['NormalSubstitutionNode'],
['CloseElementNode']]],
['OpenStartElementNode', 'BackupPath', [
['CloseStartElementNode'],
['NormalSubstitutionNode'],
['CloseElementNode']]],
['CloseElementNode']]],
['EndOfStreamNode']]]]],
['Substitutions', None, [
['WstringTypeNode', 'System'],
['WstringTypeNode', 'C:\Windows\System32\Winevt\Logs\Archive-System-2012-03-14-04-17-39-932.evtx']]]]]]]]]]]
assert extract_structure(record.root()) == expected
def test_render_record(system):
'''
regression test demonstrating formatting a record to xml.
Args:
system (bytes): the system.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(system, 0x0)
chunk = one(fh.chunks())
record = one(chunk.records())
xml = record.xml()
assert xml == textwrap.dedent('''\
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"><System><Provider Name="Microsoft-Windows-Eventlog" Guid="{fc65ddd8-d6ef-4962-83d5-6e5cfe9ce148}"></Provider>
<EventID Qualifiers="">105</EventID>
<Version>0</Version>
<Level>4</Level>
<Task>105</Task>
<Opcode>0</Opcode>
<Keywords>0x8000000000000000</Keywords>
<TimeCreated SystemTime="2012-03-14 04:17:43.354563"></TimeCreated>
<EventRecordID>12049</EventRecordID>
<Correlation ActivityID="" RelatedActivityID=""></Correlation>
<Execution ProcessID="820" ThreadID="2868"></Execution>
<Channel>System</Channel>
<Computer>WKS-WIN764BITB.shieldbase.local</Computer>
<Security UserID=""></Security>
</System>
<UserData><AutoBackup xmlns:auto-ns3="http://schemas.microsoft.com/win/2004/08/events" xmlns="http://manifests.microsoft.com/win/2004/08/windows/eventlog"><Channel>System</Channel>
<BackupPath>C:\\Windows\\System32\\Winevt\\Logs\\Archive-System-2012-03-14-04-17-39-932.evtx</BackupPath>
</AutoBackup>
</UserData>
</Event>
''')
def test_render_records(system):
'''
regression test demonstrating formatting records to xml.
Args:
system (bytes): the system.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(system, 0x0)
for chunk in fh.chunks():
for record in chunk.records():
assert record.xml() is not None
def test_render_records2(security):
'''
regression test demonstrating formatting records to xml.
Args:
security (bytes): the security.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(security, 0x0)
for chunk in fh.chunks():
for record in chunk.records():
assert record.xml() is not None
@pytest.mark.skipif(no_lxml, reason='lxml not installed')
def test_render_records_lxml(system):
'''
regression test demonstrating formatting records to xml.
Args:
system (bytes): the system.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(system, 0x0)
for i, chunk in enumerate(fh.chunks()):
for j, record in enumerate(chunk.records()):
assert record.lxml() is not None
@pytest.mark.skipif(no_lxml, reason='lxml not installed')
def test_render_records_lxml2(security):
'''
regression test demonstrating formatting records to xml.
Args:
security (bytes): the security.evtx test file contents. pytest fixture.
'''
fh = evtx.FileHeader(security, 0x0)
for i, chunk in enumerate(fh.chunks()):
for j, record in enumerate(chunk.records()):
assert record.lxml() is not None
|
