175 lines
6.5 KiB
Python
175 lines
6.5 KiB
Python
import datetime as dt
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import re
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import pytest
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import pytz
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import stix2
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from .constants import FAKE_TIME, INDICATOR_ID, INDICATOR_KWARGS
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EXPECTED_INDICATOR = """{
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"created": "2017-01-01T00:00:01Z",
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"id": "indicator--01234567-89ab-cdef-0123-456789abcdef",
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"labels": [
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"malicious-activity"
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],
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"modified": "2017-01-01T00:00:01Z",
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"pattern": "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
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"type": "indicator",
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"valid_from": "1970-01-01T00:00:01Z"
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}"""
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EXPECTED_INDICATOR_REPR = "Indicator(" + " ".join("""
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created=datetime.datetime(2017, 1, 1, 0, 0, 1, tzinfo=<UTC>),
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id='indicator--01234567-89ab-cdef-0123-456789abcdef',
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labels=['malicious-activity'],
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modified=datetime.datetime(2017, 1, 1, 0, 0, 1, tzinfo=<UTC>),
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pattern="[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
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type='indicator',
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valid_from=datetime.datetime(1970, 1, 1, 0, 0, 1, tzinfo=<UTC>)
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""".split()) + ")"
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def test_indicator_with_all_required_properties():
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now = dt.datetime(2017, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
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epoch = dt.datetime(1970, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
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ind = stix2.Indicator(
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type="indicator",
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id=INDICATOR_ID,
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labels=['malicious-activity'],
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pattern="[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
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created=now,
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modified=now,
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valid_from=epoch,
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)
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assert str(ind) == EXPECTED_INDICATOR
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rep = re.sub(r"(\[|=| )u('|\"|\\\'|\\\")", r"\g<1>\g<2>", repr(ind))
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assert rep == EXPECTED_INDICATOR_REPR
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def test_indicator_autogenerated_properties(indicator):
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assert indicator.type == 'indicator'
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assert indicator.id == 'indicator--00000000-0000-0000-0000-000000000001'
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assert indicator.created == FAKE_TIME
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assert indicator.modified == FAKE_TIME
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assert indicator.labels == ['malicious-activity']
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assert indicator.pattern == "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']"
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assert indicator.valid_from == FAKE_TIME
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assert indicator['type'] == 'indicator'
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assert indicator['id'] == 'indicator--00000000-0000-0000-0000-000000000001'
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assert indicator['created'] == FAKE_TIME
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assert indicator['modified'] == FAKE_TIME
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assert indicator['labels'] == ['malicious-activity']
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assert indicator['pattern'] == "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']"
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assert indicator['valid_from'] == FAKE_TIME
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def test_indicator_type_must_be_indicator():
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with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
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stix2.Indicator(type='xxx', **INDICATOR_KWARGS)
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.prop_name == "type"
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assert excinfo.value.reason == "must equal 'indicator'."
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assert str(excinfo.value) == "Invalid value for Indicator 'type': must equal 'indicator'."
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def test_indicator_id_must_start_with_indicator():
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with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
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stix2.Indicator(id='my-prefix--', **INDICATOR_KWARGS)
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.prop_name == "id"
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assert excinfo.value.reason == "must start with 'indicator--'."
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assert str(excinfo.value) == "Invalid value for Indicator 'id': must start with 'indicator--'."
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def test_indicator_required_properties():
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with pytest.raises(stix2.exceptions.MissingPropertiesError) as excinfo:
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stix2.Indicator()
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.properties == ["labels", "pattern"]
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assert str(excinfo.value) == "No values for required properties for Indicator: (labels, pattern)."
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def test_indicator_required_property_pattern():
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with pytest.raises(stix2.exceptions.MissingPropertiesError) as excinfo:
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stix2.Indicator(labels=['malicious-activity'])
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.properties == ["pattern"]
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def test_indicator_created_ref_invalid_format():
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with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
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stix2.Indicator(created_by_ref='myprefix--12345678', **INDICATOR_KWARGS)
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.prop_name == "created_by_ref"
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assert excinfo.value.reason == "must start with 'identity'."
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assert str(excinfo.value) == "Invalid value for Indicator 'created_by_ref': must start with 'identity'."
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def test_indicator_revoked_invalid():
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with pytest.raises(stix2.exceptions.InvalidValueError) as excinfo:
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stix2.Indicator(revoked='no', **INDICATOR_KWARGS)
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.prop_name == "revoked"
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assert excinfo.value.reason == "must be a boolean value."
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def test_cannot_assign_to_indicator_attributes(indicator):
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with pytest.raises(stix2.exceptions.ImmutableError) as excinfo:
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indicator.valid_from = dt.datetime.now()
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assert str(excinfo.value) == "Cannot modify 'valid_from' property in <class 'stix2.sdo.Indicator'> after creation."
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def test_invalid_kwarg_to_indicator():
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with pytest.raises(stix2.exceptions.ExtraPropertiesError) as excinfo:
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stix2.Indicator(my_custom_property="foo", **INDICATOR_KWARGS)
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assert excinfo.value.cls == stix2.Indicator
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assert excinfo.value.properties == ['my_custom_property']
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assert str(excinfo.value) == "Unexpected properties for Indicator: (my_custom_property)."
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def test_created_modified_time_are_identical_by_default():
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"""By default, the created and modified times should be the same."""
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ind = stix2.Indicator(**INDICATOR_KWARGS)
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assert ind.created == ind.modified
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@pytest.mark.parametrize("data", [
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EXPECTED_INDICATOR,
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{
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"type": "indicator",
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"id": "indicator--01234567-89ab-cdef-0123-456789abcdef",
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"created": "2017-01-01T00:00:01Z",
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"modified": "2017-01-01T00:00:01Z",
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"labels": [
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"malicious-activity"
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],
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"pattern": "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']",
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"valid_from": "1970-01-01T00:00:01Z"
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},
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])
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def test_parse_indicator(data):
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idctr = stix2.parse(data)
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assert idctr.type == 'indicator'
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assert idctr.id == INDICATOR_ID
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assert idctr.created == dt.datetime(2017, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
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assert idctr.modified == dt.datetime(2017, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
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assert idctr.valid_from == dt.datetime(1970, 1, 1, 0, 0, 1, tzinfo=pytz.utc)
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assert idctr.labels[0] == "malicious-activity"
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assert idctr.pattern == "[file:hashes.MD5 = 'd41d8cd98f00b204e9800998ecf8427e']"
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