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cti-python-stix2/stix2/test/test_data_sources.py

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import pytest
from taxii2client import Collection
from stix2 import Filter, MemorySource
from stix2.sources import (CompositeDataSource, DataSink, DataSource,
DataStore, make_id, taxii)
from stix2.sources.filters import apply_common_filters
from stix2.utils import deduplicate
COLLECTION_URL = 'https://example.com/api1/collections/91a7b528-80eb-42ed-a74d-c6fbd5a26116/'
class MockTAXIIClient(object):
"""Mock for taxii2_client.TAXIIClient"""
pass
@pytest.fixture
def collection():
return Collection(COLLECTION_URL, MockTAXIIClient())
@pytest.fixture
def ds():
return DataSource()
IND1 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND2 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND3 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.936Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND4 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND5 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND6 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-31T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND7 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
IND8 = {
"created": "2017-01-27T13:49:53.935Z",
"id": "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f",
"labels": [
"url-watchlist"
],
"modified": "2017-01-27T13:49:53.935Z",
"name": "Malicious site hosting downloader",
"pattern": "[url:value = 'http://x4z9arb.cn/4712']",
"type": "indicator",
"valid_from": "2017-01-27T13:49:53.935382Z"
}
STIX_OBJS2 = [IND6, IND7, IND8]
STIX_OBJS1 = [IND1, IND2, IND3, IND4, IND5]
def test_ds_abstract_class_smoke():
ds1 = DataSource()
ds2 = DataSink()
ds3 = DataStore(source=ds1, sink=ds2)
with pytest.raises(NotImplementedError):
ds3.add(None)
with pytest.raises(NotImplementedError):
ds3.all_versions("malware--fdd60b30-b67c-11e3-b0b9-f01faf20d111")
with pytest.raises(NotImplementedError):
ds3.get("malware--fdd60b30-b67c-11e3-b0b9-f01faf20d111")
with pytest.raises(NotImplementedError):
ds3.query([Filter("id", "=", "malware--fdd60b30-b67c-11e3-b0b9-f01faf20d111")])
def test_ds_taxii(collection):
ds = taxii.TAXIICollectionSource(collection)
assert ds.collection is not None
def test_ds_taxii_name(collection):
ds = taxii.TAXIICollectionSource(collection)
assert ds.collection is not None
def test_parse_taxii_filters():
query = [
Filter("added_after", "=", "2016-02-01T00:00:01.000Z"),
Filter("id", "=", "taxii stix object ID"),
Filter("type", "=", "taxii stix object ID"),
Filter("version", "=", "first"),
Filter("created_by_ref", "=", "Bane"),
]
expected_params = {
"added_after": "2016-02-01T00:00:01.000Z",
"match[id]": "taxii stix object ID",
"match[type]": "taxii stix object ID",
"match[version]": "first"
}
ds = taxii.TAXIICollectionSource(collection)
taxii_filters = ds._parse_taxii_filters(query)
assert taxii_filters == expected_params
def test_add_get_remove_filter(ds):
# First 3 filters are valid, remaining fields are erroneous in some way
valid_filters = [
Filter('type', '=', 'malware'),
Filter('id', '!=', 'stix object id'),
Filter('labels', 'in', ["heartbleed", "malicious-activity"]),
]
# Invalid filters - wont pass creation
# these filters will not be allowed to be created
# check proper errors are raised when trying to create them
with pytest.raises(ValueError) as excinfo:
# create Filter that has an operator that is not allowed
Filter('modified', '*', 'not supported operator - just place holder')
assert str(excinfo.value) == "Filter operator '*' not supported for specified field: 'modified'"
with pytest.raises(TypeError) as excinfo:
# create Filter that has a value type that is not allowed
Filter('created', '=', object())
# On Python 2, the type of object() is `<type 'object'>` On Python 3, it's `<class 'object'>`.
assert str(excinfo.value).startswith("Filter value type")
assert str(excinfo.value).endswith("is not supported. The type must be a python immutable type or dictionary")
assert len(ds.filters) == 0
ds.filters.add(valid_filters[0])
assert len(ds.filters) == 1
# Addin the same filter again will have no effect since `filters` uses a set
ds.filters.add(valid_filters[0])
assert len(ds.filters) == 1
ds.filters.add(valid_filters[1])
assert len(ds.filters) == 2
ds.filters.add(valid_filters[2])
assert len(ds.filters) == 3
assert set(valid_filters) == ds.filters
# remove
ds.filters.remove(valid_filters[0])
assert len(ds.filters) == 2
ds.filters.update(valid_filters)
def test_apply_common_filters(ds):
stix_objs = [
{
"created": "2017-01-27T13:49:53.997Z",
"description": "\n\nTITLE:\n\tPoison Ivy",
"id": "malware--fdd60b30-b67c-11e3-b0b9-f01faf20d111",
"labels": [
"remote-access-trojan"
],
"modified": "2017-01-27T13:49:53.997Z",
"name": "Poison Ivy",
"type": "malware"
},
{
"created": "2014-05-08T09:00:00.000Z",
"id": "indicator--a932fcc6-e032-176c-126f-cb970a5a1ade",
"labels": [
"file-hash-watchlist"
],
"modified": "2014-05-08T09:00:00.000Z",
"name": "File hash for Poison Ivy variant",
"pattern": "[file:hashes.'SHA-256' = 'ef537f25c895bfa782526529a9b63d97aa631564d5d789c2b765448c8635fb6c']",
"type": "indicator",
"valid_from": "2014-05-08T09:00:00.000000Z"
},
{
"created": "2014-05-08T09:00:00.000Z",
"granular_markings": [
{
"marking_ref": "marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed",
"selectors": [
"relationship_type"
]
}
],
"id": "relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463",
"modified": "2014-05-08T09:00:00.000Z",
"object_marking_refs": [
"marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9"
],
"relationship_type": "indicates",
"revoked": True,
"source_ref": "indicator--a932fcc6-e032-176c-126f-cb970a5a1ade",
"target_ref": "malware--fdd60b30-b67c-11e3-b0b9-f01faf20d111",
"type": "relationship"
},
{
"id": "vulnerability--ee916c28-c7a4-4d0d-ad56-a8d357f89fef",
"created": "2016-02-14T00:00:00.000Z",
"created_by_ref": "identity--00000000-0000-0000-0000-b8e91df99dc9",
"modified": "2016-02-14T00:00:00.000Z",
"type": "vulnerability",
"name": "CVE-2014-0160",
"description": "The (1) TLS...",
"external_references": [
{
"source_name": "cve",
"external_id": "CVE-2014-0160"
}
],
"labels": ["heartbleed", "has-logo"]
}
]
filters = [
Filter("type", "!=", "relationship"),
Filter("id", "=", "relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463"),
Filter("labels", "in", "remote-access-trojan"),
Filter("created", ">", "2015-01-01T01:00:00.000Z"),
Filter("revoked", "=", True),
Filter("revoked", "!=", True),
Filter("object_marking_refs", "=", "marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9"),
Filter("granular_markings.selectors", "in", "relationship_type"),
Filter("granular_markings.marking_ref", "=", "marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed"),
Filter("external_references.external_id", "in", "CVE-2014-0160,CVE-2017-6608"),
Filter("created_by_ref", "=", "identity--00000000-0000-0000-0000-b8e91df99dc9"),
Filter("object_marking_refs", "=", "marking-definition--613f2e26-0000-0000-0000-b8e91df99dc9"),
Filter("granular_markings.selectors", "in", "description"),
Filter("external_references.source_name", "=", "CVE"),
]
# "Return any object whose type is not relationship"
resp = list(apply_common_filters(stix_objs, [filters[0]]))
ids = [r['id'] for r in resp]
assert stix_objs[0]['id'] in ids
assert stix_objs[1]['id'] in ids
assert stix_objs[3]['id'] in ids
assert len(ids) == 3
# "Return any object that matched id relationship--2f9a9aa9-108a-4333-83e2-4fb25add0463"
resp = list(apply_common_filters(stix_objs, [filters[1]]))
assert resp[0]['id'] == stix_objs[2]['id']
assert len(resp) == 1
# "Return any object that contains remote-access-trojan in labels"
resp = list(apply_common_filters(stix_objs, [filters[2]]))
assert resp[0]['id'] == stix_objs[0]['id']
assert len(resp) == 1
# "Return any object created after 2015-01-01T01:00:00.000Z"
resp = list(apply_common_filters(stix_objs, [filters[3]]))
assert resp[0]['id'] == stix_objs[0]['id']
assert len(resp) == 2
# "Return any revoked object"
resp = list(apply_common_filters(stix_objs, [filters[4]]))
assert resp[0]['id'] == stix_objs[2]['id']
assert len(resp) == 1
# "Return any object whose not revoked"
# Note that if 'revoked' property is not present in object.
# Currently we can't use such an expression to filter for... :(
resp = list(apply_common_filters(stix_objs, [filters[5]]))
assert len(resp) == 0
# "Return any object that matches marking-definition--613f2e26-407d-48c7-9eca-b8e91df99dc9 in object_marking_refs"
resp = list(apply_common_filters(stix_objs, [filters[6]]))
assert resp[0]['id'] == stix_objs[2]['id']
assert len(resp) == 1
# "Return any object that contains relationship_type in their selectors AND
# also has marking-definition--5e57c739-391a-4eb3-b6be-7d15ca92d5ed in marking_ref"
resp = list(apply_common_filters(stix_objs, [filters[7], filters[8]]))
assert resp[0]['id'] == stix_objs[2]['id']
assert len(resp) == 1
# "Return any object that contains CVE-2014-0160,CVE-2017-6608 in their external_id"
resp = list(apply_common_filters(stix_objs, [filters[9]]))
assert resp[0]['id'] == stix_objs[3]['id']
assert len(resp) == 1
# "Return any object that matches created_by_ref identity--00000000-0000-0000-0000-b8e91df99dc9"
resp = list(apply_common_filters(stix_objs, [filters[10]]))
assert len(resp) == 1
# "Return any object that matches marking-definition--613f2e26-0000-0000-0000-b8e91df99dc9 in object_marking_refs" (None)
resp = list(apply_common_filters(stix_objs, [filters[11]]))
assert len(resp) == 0
# "Return any object that contains description in its selectors" (None)
resp = list(apply_common_filters(stix_objs, [filters[12]]))
assert len(resp) == 0
# "Return any object that object that matches CVE in source_name" (None, case sensitive)
resp = list(apply_common_filters(stix_objs, [filters[13]]))
assert len(resp) == 0
def test_filters0(ds):
# "Return any object modified before 2017-01-28T13:49:53.935Z"
resp = list(apply_common_filters(STIX_OBJS2, [Filter("modified", "<", "2017-01-28T13:49:53.935Z")]))
assert resp[0]['id'] == STIX_OBJS2[1]['id']
assert len(resp) == 2
def test_filters1(ds):
# "Return any object modified after 2017-01-28T13:49:53.935Z"
resp = list(apply_common_filters(STIX_OBJS2, [Filter("modified", ">", "2017-01-28T13:49:53.935Z")]))
assert resp[0]['id'] == STIX_OBJS2[0]['id']
assert len(resp) == 1
def test_filters2(ds):
# "Return any object modified after or on 2017-01-28T13:49:53.935Z"
resp = list(apply_common_filters(STIX_OBJS2, [Filter("modified", ">=", "2017-01-27T13:49:53.935Z")]))
assert resp[0]['id'] == STIX_OBJS2[0]['id']
assert len(resp) == 3
def test_filters3(ds):
# "Return any object modified before or on 2017-01-28T13:49:53.935Z"
resp = list(apply_common_filters(STIX_OBJS2, [Filter("modified", "<=", "2017-01-27T13:49:53.935Z")]))
assert resp[0]['id'] == STIX_OBJS2[1]['id']
assert len(resp) == 2
def test_filters4(ds):
# Assert invalid Filter cannot be created
with pytest.raises(ValueError) as excinfo:
Filter("modified", "?", "2017-01-27T13:49:53.935Z")
assert str(excinfo.value) == ("Filter operator '?' not supported "
"for specified field: 'modified'")
def test_filters5(ds):
# "Return any object whose id is not indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f"
resp = list(apply_common_filters(STIX_OBJS2, [Filter("id", "!=", "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f")]))
assert resp[0]['id'] == STIX_OBJS2[0]['id']
assert len(resp) == 1
def test_deduplicate(ds):
unique = deduplicate(STIX_OBJS1)
# Only 3 objects are unique
# 2 id's vary
# 2 modified times vary for a particular id
assert len(unique) == 3
ids = [obj['id'] for obj in unique]
mods = [obj['modified'] for obj in unique]
assert "indicator--d81f86b8-975b-bc0b-775e-810c5ad45a4f" in ids
assert "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f" in ids
assert "2017-01-27T13:49:53.935Z" in mods
assert "2017-01-27T13:49:53.936Z" in mods
def test_add_remove_composite_datasource():
cds = CompositeDataSource()
ds1 = DataSource()
ds2 = DataSource()
ds3 = DataSink()
with pytest.raises(TypeError) as excinfo:
cds.add_data_sources([ds1, ds2, ds1, ds3])
assert str(excinfo.value) == ("DataSource (to be added) is not of type "
"stix2.DataSource. DataSource type is '<class 'stix2.sources.DataSink'>'")
cds.add_data_sources([ds1, ds2, ds1])
assert len(cds.get_all_data_sources()) == 2
cds.remove_data_sources([ds1.id, ds2.id])
assert len(cds.get_all_data_sources()) == 0
def test_composite_datasource_operations():
BUNDLE1 = dict(id="bundle--%s" % make_id(),
objects=STIX_OBJS1,
spec_version="2.0",
type="bundle")
cds = CompositeDataSource()
ds1 = MemorySource(stix_data=BUNDLE1)
ds2 = MemorySource(stix_data=STIX_OBJS2)
cds.add_data_sources([ds1, ds2])
indicators = cds.all_versions("indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f")
# In STIX_OBJS2 changed the 'modified' property to a later time...
assert len(indicators) == 2
indicator = cds.get("indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f")
assert indicator["id"] == "indicator--d81f86b9-975b-bc0b-775e-810c5ad45a4f"
assert indicator["modified"] == "2017-01-31T13:49:53.935Z"
assert indicator["type"] == "indicator"
query = [
Filter("type", "=", "indicator")
]
results = cds.query(query)
# STIX_OBJS2 has indicator with later time, one with different id, one with
# original time in STIX_OBJS1
assert len(results) == 3
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