cti-python-stix2/stix2/custom.py

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from collections import OrderedDict
import re
from .base import _cls_init, _Extension, _Observable, _STIXBase
from .core import (
STIXDomainObject, _register_marking, _register_object,
_register_observable, _register_observable_extension,
)
from .utils import TYPE_REGEX, get_class_hierarchy_names
def _custom_object_builder(cls, type, properties, version):
class _CustomObject(cls, STIXDomainObject):
if not re.match(TYPE_REGEX, type):
raise ValueError(
"Invalid type name '%s': must only contain the "
"characters a-z (lowercase ASCII), 0-9, and hyphen (-)." % type,
)
elif len(type) < 3 or len(type) > 250:
raise ValueError(
"Invalid type name '%s': must be between 3 and 250 characters." % type,
)
if not properties or not isinstance(properties, list):
raise ValueError("Must supply a list, containing tuples. For example, [('property1', IntegerProperty())]")
_type = type
_properties = OrderedDict(properties)
def __init__(self, **kwargs):
_STIXBase.__init__(self, **kwargs)
_cls_init(cls, self, kwargs)
_register_object(_CustomObject, version=version)
return _CustomObject
def _custom_marking_builder(cls, type, properties, version):
class _CustomMarking(cls, _STIXBase):
if not properties or not isinstance(properties, list):
raise ValueError("Must supply a list, containing tuples. For example, [('property1', IntegerProperty())]")
_type = type
_properties = OrderedDict(properties)
def __init__(self, **kwargs):
_STIXBase.__init__(self, **kwargs)
_cls_init(cls, self, kwargs)
_register_marking(_CustomMarking, version=version)
return _CustomMarking
def _custom_observable_builder(cls, type, properties, version):
class _CustomObservable(cls, _Observable):
if not re.match(TYPE_REGEX, type):
raise ValueError(
"Invalid observable type name '%s': must only contain the "
"characters a-z (lowercase ASCII), 0-9, and hyphen (-)." % type,
)
elif len(type) < 3 or len(type) > 250:
raise ValueError("Invalid observable type name '%s': must be between 3 and 250 characters." % type)
if not properties or not isinstance(properties, list):
raise ValueError("Must supply a list, containing tuples. For example, [('property1', IntegerProperty())]")
if version == "2.0":
# If using STIX2.0, check properties ending in "_ref/s" are ObjectReferenceProperties
for prop_name, prop in properties:
if prop_name.endswith('_ref') and ('ObjectReferenceProperty' not in get_class_hierarchy_names(prop)):
raise ValueError(
"'%s' is named like an object reference property but "
"is not an ObjectReferenceProperty." % prop_name,
)
elif (prop_name.endswith('_refs') and ('ListProperty' not in get_class_hierarchy_names(prop) or
'ObjectReferenceProperty' not in get_class_hierarchy_names(prop.contained))):
raise ValueError(
"'%s' is named like an object reference list property but "
"is not a ListProperty containing ObjectReferenceProperty." % prop_name,
)
else:
# If using STIX2.1 (or newer...), check properties ending in "_ref/s" are ReferenceProperties
for prop_name, prop in properties:
if prop_name.endswith('_ref') and ('ReferenceProperty' not in get_class_hierarchy_names(prop)):
raise ValueError(
"'%s' is named like a reference property but "
"is not a ReferenceProperty." % prop_name,
)
elif (prop_name.endswith('_refs') and ('ListProperty' not in get_class_hierarchy_names(prop) or
'ReferenceProperty' not in get_class_hierarchy_names(prop.contained))):
raise ValueError(
"'%s' is named like a reference list property but "
"is not a ListProperty containing ReferenceProperty." % prop_name,
)
_type = type
_properties = OrderedDict(properties)
def __init__(self, **kwargs):
_Observable.__init__(self, **kwargs)
_cls_init(cls, self, kwargs)
_register_observable(_CustomObservable, version=version)
return _CustomObservable
def _custom_extension_builder(cls, observable, type, properties, version):
if not observable or not issubclass(observable, _Observable):
raise ValueError("'observable' must be a valid Observable class!")
class _CustomExtension(cls, _Extension):
if not re.match(TYPE_REGEX, type):
raise ValueError(
"Invalid extension type name '%s': must only contain the "
"characters a-z (lowercase ASCII), 0-9, and hyphen (-)." % type,
)
elif len(type) < 3 or len(type) > 250:
raise ValueError("Invalid extension type name '%s': must be between 3 and 250 characters." % type)
if not properties or not isinstance(properties, list):
raise ValueError("Must supply a list, containing tuples. For example, [('property1', IntegerProperty())]")
_type = type
_properties = OrderedDict(properties)
def __init__(self, **kwargs):
_Extension.__init__(self, **kwargs)
_cls_init(cls, self, kwargs)
_register_observable_extension(observable, _CustomExtension, version=version)
return _CustomExtension