def query(self, query=None, _composite_filters=None):
"""Search and retrieve STIX objects based on the complete query.
A "complete query" includes the filters from the query, the filters
attached to this MemorySource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters).
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from the
CompositeDataSource, not user supplied
Returns:
(list): list of STIX objects that matches the supplied
query. As the MemoryStore(i.e. MemorySink) adds STIX objects to memory
as they are supplied (either as python dictionary or STIX object), it
is returned in the same form as it as added.
"""
if query is None:
query = FilterSet()
else:
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# Apply STIX common property filters.
all_data = list(apply_common_filters(self._data.values(), query))
return all_data
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retreive STIX objects based on the complete query
A "complete query" includes the filters from the query, the filters
attached to MemorySource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters)
Args:
query (list): list of filters to search on
version (str): If present, it forces the parser to use the version
provided. Otherwise, the library will make the best effort based
on checking the "spec_version" property.
_composite_filters (FilterSet): collection of filters passed from
the CompositeDataSource, not user supplied
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are received from TAXII as dicts,
parsed into python STIX objects and then returned.
"""
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# parse taxii query params (that can be applied remotely)
taxii_filters = self._parse_taxii_filters(query)
# taxii2client requires query params as keywords
taxii_filters_dict = dict((f.property, f.value) for f in taxii_filters)
# query TAXII collection
try:
all_data = self.collection.get_objects(**taxii_filters_dict)['objects']
# deduplicate data (before filtering as reduces wasted filtering)
all_data = deduplicate(all_data)
# apply local (CompositeDataSource, TAXIICollectionSource and query) filters
query.remove(taxii_filters)
all_data = list(apply_common_filters(all_data, query))
except HTTPError as e:
# if resources not found or access is denied from TAXII server, return empty list
if e.response.status_code == 404:
raise DataSourceError(
"The requested STIX objects for the TAXII Collection resource defined in"
" the supplied TAXII Collection object are either not found or access is"
" denied. Received error: ", e,
)
# parse python STIX objects from the STIX object dicts
stix_objs = [parse(stix_obj_dict, allow_custom=self.allow_custom, version=version) for stix_obj_dict in all_data]
return stix_objs
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retreive STIX objects based on the complete query
A "complete query" includes the filters from the query, the filters
attached to MemorySource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters)
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from the
CompositeDataSource, not user supplied
version (str): Which STIX2 version to use. (e.g. "2.0", "2.1"). If
None, use latest version.
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are received from TAXII as dicts,
parsed into python STIX objects and then returned.
"""
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# parse taxii query params (that can be applied remotely)
taxii_filters = self._parse_taxii_filters(query)
# taxii2client requires query params as keywords
taxii_filters_dict = dict((f.property, f.value) for f in taxii_filters)
# query TAXII collection
try:
all_data = self.collection.get_objects(
**taxii_filters_dict)["objects"]
# deduplicate data (before filtering as reduces wasted filtering)
all_data = deduplicate(all_data)
# apply local (CompositeDataSource, TAXIICollectionSource and query) filters
query.remove(taxii_filters)
all_data = list(apply_common_filters(all_data, query))
except HTTPError:
# if resources not found or access is denied from TAXII server, return empty list
all_data = []
# parse python STIX objects from the STIX object dicts
stix_objs = [
parse(stix_obj_dict,
allow_custom=self.allow_custom,
version=version) for stix_obj_dict in all_data
]
return stix_objs
def query(self, query=None, _composite_filters=None):
"""Search and retrieve STIX objects based on the complete query.
A "complete query" includes the filters from the query, the filters
attached to this MemorySource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters).
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from
the CompositeDataSource, not user supplied
Returns:
(list): list of STIX objects that match the supplied query.
"""
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
all_objs = itertools.chain.from_iterable(
value.all_versions.values() if isinstance(value, _ObjectFamily
) else [value]
for value in self._data.values())
# Apply STIX common property filters.
all_data = list(apply_common_filters(all_objs, query))
return all_data
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retrieve STIX objects based on the complete query.
A "complete query" includes the filters from the query, the filters
attached to this FileSystemSource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters).
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from
the CompositeDataSource, not user supplied
version (str): If present, it forces the parser to use the version
provided. Otherwise, the library will make the best effort based
on checking the "spec_version" property.
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are loaded from their json files,
parsed into a python STIX objects and then returned.
"""
all_data = []
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
auth_types, auth_ids = _find_search_optimizations(query)
type_dirs = _get_matching_dir_entries(
self._stix_dir,
auth_types,
stat.S_ISDIR,
)
for type_dir in type_dirs:
type_path = os.path.join(self._stix_dir, type_dir)
type_is_versioned = _is_versioned_type_dir(type_path, type_dir)
if type_is_versioned:
type_results = _search_versioned(
query,
type_path,
auth_ids,
self.allow_custom,
version,
self.encoding,
)
else:
type_results = _search_unversioned(
query,
type_path,
auth_ids,
self.allow_custom,
version,
self.encoding,
)
all_data.extend(type_results)
return all_data
def related_to(self,
obj,
relationship_type=None,
source_only=False,
target_only=False,
filters=None):
"""Retrieve STIX Objects that have a Relationship involving the given
STIX object.
Only one of `source_only` and `target_only` may be `True`.
Args:
obj (STIX object OR dict OR str): The STIX object (or its ID) whose
related objects will be looked up.
relationship_type (str): Only retrieve objects related by this
Relationships type. If None, all related objects will be
returned, regardless of type.
source_only (bool): Only examine Relationships for which this
object is the source_ref. Default: False.
target_only (bool): Only examine Relationships for which this
object is the target_ref. Default: False.
filters (list): list of additional filters the related objects must
match.
Returns:
list: The STIX objects related to the given STIX object.
"""
results = []
rels = self.relationships(obj, relationship_type, source_only,
target_only)
try:
obj_id = obj['id']
except TypeError:
# Assume `obj` is an ID string
obj_id = obj
# Get all unique ids from the relationships except that of the object
ids = set()
for r in rels:
ids.update((r.source_ref, r.target_ref))
ids.discard(obj_id)
# Assemble filters
filter_list = FilterSet(filters)
for i in ids:
results.extend(
self.query([f for f in filter_list] + [Filter('id', '=', i)]))
return results
def get(self, stix_id, version=None, _composite_filters=None):
"""Retrieve STIX object from local/remote STIX Collection
endpoint.
Args:
stix_id (str): The STIX ID of the STIX object to be retrieved.
version (str): If present, it forces the parser to use the version
provided. Otherwise, the library will make the best effort based
on checking the "spec_version" property.
_composite_filters (FilterSet): collection of filters passed from
the parent CompositeDataSource, not user supplied
Returns:
(STIX object): STIX object that has the supplied STIX ID.
The STIX object is received from TAXII has dict, parsed into
a python STIX object and then returned
"""
# combine all query filters
query = FilterSet()
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# don't extract TAXII filters from query (to send to TAXII endpoint)
# as directly retrieving a STIX object by ID
try:
stix_objs = self.collection.get_object(stix_id)['objects']
stix_obj = list(apply_common_filters(stix_objs, query))
except HTTPError as e:
if e.response.status_code == 404:
# if resource not found or access is denied from TAXII server,
# return None
stix_obj = []
else:
raise DataSourceError(
"TAXII Collection resource returned error", e)
if len(stix_obj):
stix_obj = parse(stix_obj[0],
allow_custom=self.allow_custom,
version=version)
if stix_obj['id'] != stix_id:
# check - was added to handle erroneous TAXII servers
stix_obj = None
else:
stix_obj = None
return stix_obj
def get(self, stix_id, _composite_filters=None):
"""Retrieve STIX object by STIX ID
Federated retrieve method, iterates through all DataSources
defined in the "data_sources" parameter. Each data source has a
specific API retrieve-like function and associated parameters. This
function does a federated retrieval and consolidation of the data
returned from all the STIX data sources.
A composite data source will pass its attached filters to
each configured data source, pushing filtering to them to handle.
Args:
stix_id (str): the id of the STIX object to retrieve.
_composite_filters (FilterSet): a collection of filters passed from a
CompositeDataSource (i.e. if this CompositeDataSource is attached
to another parent CompositeDataSource), not user supplied.
Returns:
stix_obj: The STIX object to be returned.
"""
if not self.has_data_sources():
raise AttributeError("CompositeDataSource has no data sources")
all_data = []
all_filters = FilterSet()
all_filters.add(self.filters)
if _composite_filters:
all_filters.add(_composite_filters)
# for every configured Data Source, call its retrieve handler
for ds in self.data_sources:
data = ds.get(stix_id=stix_id, _composite_filters=all_filters)
if data:
all_data.append(data)
# remove duplicate versions
if len(all_data) > 0:
all_data = deduplicate(all_data)
else:
return None
# reduce to most recent version
stix_obj = sorted(all_data, key=lambda k: k['modified'],
reverse=True)[0]
return stix_obj
def get(self, stix_id, version=None, _composite_filters=None):
"""Retrieve STIX object from local/remote STIX Collection
endpoint.
Args:
stix_id (str): The STIX ID of the STIX object to be retrieved.
_composite_filters (FilterSet): collection of filters passed from the parent
CompositeDataSource, not user supplied
version (str): Which STIX2 version to use. (e.g. "2.0", "2.1"). If
None, use latest version.
Returns:
(STIX object): STIX object that has the supplied STIX ID.
The STIX object is received from TAXII has dict, parsed into
a python STIX object and then returned
"""
# combine all query filters
query = FilterSet()
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# dont extract TAXII filters from query (to send to TAXII endpoint)
# as directly retrieveing a STIX object by ID
try:
stix_objs = self.collection.get_object(stix_id)["objects"]
stix_obj = list(apply_common_filters(stix_objs, query))
except HTTPError as e:
if e.response.status_code == 404:
# if resource not found or access is denied from TAXII server, return None
stix_obj = []
else:
raise DataSourceError(
"TAXII Collection resource returned error", e)
if len(stix_obj):
stix_obj = parse(stix_obj[0],
allow_custom=self.allow_custom,
version=version)
if stix_obj.id != stix_id:
# check - was added to handle erroneous TAXII servers
stix_obj = None
else:
stix_obj = None
return stix_obj
def get(self, stix_id, _composite_filters=None):
"""Retrieve STIX object by STIX ID
Federated retrieve method, iterates through all DataSources
defined in the "data_sources" parameter. Each data source has a
specific API retrieve-like function and associated parameters. This
function does a federated retrieval and consolidation of the data
returned from all the STIX data sources.
A composite data source will pass its attached filters to
each configured data source, pushing filtering to them to handle.
Args:
stix_id (str): the id of the STIX object to retrieve.
_composite_filters (FilterSet): a collection of filters passed from a
CompositeDataSource (i.e. if this CompositeDataSource is attached
to another parent CompositeDataSource), not user supplied.
Returns:
stix_obj: The STIX object to be returned.
"""
if not self.has_data_sources():
raise AttributeError("CompositeDataSource has no data sources")
all_data = []
all_filters = FilterSet()
all_filters.add(self.filters)
if _composite_filters:
all_filters.add(_composite_filters)
# for every configured Data Source, call its retrieve handler
for ds in self.data_sources:
data = ds.get(stix_id=stix_id, _composite_filters=all_filters)
if data:
all_data.append(data)
# Search for latest version
stix_obj = latest_ver = None
for obj in all_data:
ver = obj.get("modified") or obj.get("created")
if stix_obj is None or ver is None or ver > latest_ver:
stix_obj = obj
latest_ver = ver
return stix_obj
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retrieve STIX objects based on the complete query.
A "complete query" includes the filters from the query, the filters
attached to this FileSystemSource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters).
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from the
CompositeDataSource, not user supplied
version (str): Which STIX2 version to use. (e.g. "2.0", "2.1"). If
None, use latest version.
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are loaded from their json files,
parsed into a python STIX objects and then returned.
"""
all_data = []
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
auth_types, auth_ids = _find_search_optimizations(query)
type_dirs = _get_matching_dir_entries(self._stix_dir, auth_types,
stat.S_ISDIR)
for type_dir in type_dirs:
type_path = os.path.join(self._stix_dir, type_dir)
if type_dir == "marking-definition":
type_results = _search_markings(query, type_path, auth_ids,
self.allow_custom, version)
else:
type_results = _search_versioned(query, type_path, auth_ids,
self.allow_custom, version)
all_data.extend(type_results)
return all_data
def query(self, query=None, _composite_filters=None):
"""Retrieve STIX objects that match a query.
Federate the query to all DataSources attached to the
Composite Data Source.
Args:
query (list): list of filters to search on.
_composite_filters (FilterSet): a collection of filters passed from a
CompositeDataSource (i.e. if this CompositeDataSource is
attached to a parent CompositeDataSource), not user supplied.
Returns:
list: The STIX objects to be returned.
"""
if not self.has_data_sources():
raise AttributeError("CompositeDataSource has no data sources")
if not query:
# don't mess with the query (i.e. deduplicate, as that's done
# within the specific DataSources that are called)
query = []
all_data = []
all_filters = FilterSet()
all_filters.add(self.filters)
if _composite_filters:
all_filters.add(_composite_filters)
# federate query to all attached data sources,
# pass composite filters to id
for ds in self.data_sources:
data = ds.query(query=query, _composite_filters=all_filters)
all_data.extend(data)
# remove exact duplicates (where duplicates are STIX 2.0
# objects with the same 'id' and 'modified' values)
if len(all_data) > 0:
all_data = deduplicate(all_data)
return all_data
def all_versions(self, stix_id, _composite_filters=None):
"""Retrieve all versions of a STIX object by STIX ID.
Federated all_versions retrieve method - iterates through all
DataSources defined in "data_sources".
A composite data source will pass its attached filters to
each configured data source, pushing filtering to them to handle.
Args:
stix_id (str): id of the STIX objects to retrieve.
_composite_filters (FilterSet): a collection of filters passed from a
CompositeDataSource (i.e. if this CompositeDataSource is
attached to a parent CompositeDataSource), not user supplied.
Returns:
list: The STIX objects that have the specified id.
"""
if not self.has_data_sources():
raise AttributeError("CompositeDataSource has no data sources")
all_data = []
all_filters = FilterSet()
all_filters.add(self.filters)
if _composite_filters:
all_filters.add(_composite_filters)
# retrieve STIX objects from all configured data sources
for ds in self.data_sources:
data = ds.all_versions(stix_id=stix_id,
_composite_filters=all_filters)
all_data.extend(data)
# remove exact duplicates (where duplicates are STIX 2.0 objects
# with the same 'id' and 'modified' values)
if len(all_data) > 0:
all_data = deduplicate(all_data)
return all_data
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retreive STIX objects based on the complete query
A "complete query" includes the filters from the query, the filters
attached to MemorySource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters)
Args:
query (list): list of filters to search on
version (str): If present, it forces the parser to use the version
provided. Otherwise, the library will make the best effort based
on checking the "spec_version" property.
_composite_filters (FilterSet): collection of filters passed from
the CompositeDataSource, not user supplied
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are received from TAXII as dicts,
parsed into python STIX objects and then returned.
"""
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# parse taxii query params (that can be applied remotely)
taxii_filters = self._parse_taxii_filters(query)
# taxii2client requires query params as keywords
taxii_filters_dict = dict((f.property, f.value) for f in taxii_filters)
# query TAXII collection
all_data = []
paged_request = tcv21.as_pages if isinstance(
self.collection, tcv21.Collection) else tcv20.as_pages
try:
for resource in paged_request(self.collection.get_objects,
per_request=self.items_per_page,
**taxii_filters_dict):
all_data.extend(resource.get("objects", []))
except HTTPError as e:
# if resources not found or access is denied from TAXII server, return empty list
if e.response.status_code == 404:
raise DataSourceError(
"The requested STIX objects for the TAXII Collection resource defined in"
" the supplied TAXII Collection object are either not found or access is"
" denied. Received error: ",
e,
)
# TAXII 2.0 paging can result in a 416 (Range Not Satisfiable) if
# the server isn't sending Content-Range headers, so the pager just
# goes until it runs out of pages. So 416 can't be treated as a
# real error, just an end-of-pages condition. For other codes,
# propagate the exception.
elif e.response.status_code != 416:
raise
# deduplicate data (before filtering as reduces wasted filtering)
all_data = deduplicate(all_data)
# apply local (CompositeDataSource, TAXIICollectionSource and query) filters
query.remove(taxii_filters)
all_data = list(apply_common_filters(all_data, query))
# parse python STIX objects from the STIX object dicts
stix_objs = [
parse(stix_obj_dict,
allow_custom=self.allow_custom,
version=version) for stix_obj_dict in all_data
]
return stix_objs
def __init__(self):
super(DataSource, self).__init__()
self.id = make_id()
self.filters = FilterSet()
def query(self, query=None, version=None, _composite_filters=None):
"""Search and retrieve STIX objects based on the complete query.
A "complete query" includes the filters from the query, the filters
attached to this FileSystemSource, and any filters passed from a
CompositeDataSource (i.e. _composite_filters).
Args:
query (list): list of filters to search on
_composite_filters (FilterSet): collection of filters passed from the
CompositeDataSource, not user supplied
version (str): Which STIX2 version to use. (e.g. "2.0", "2.1"). If
None, use latest version.
Returns:
(list): list of STIX objects that matches the supplied
query. The STIX objects are loaded from their json files,
parsed into a python STIX objects and then returned.
"""
all_data = []
query = FilterSet(query)
# combine all query filters
if self.filters:
query.add(self.filters)
if _composite_filters:
query.add(_composite_filters)
# extract any filters that are for "type" or "id" , as we can then do
# filtering before reading in the STIX objects. A STIX 'type' filter
# can reduce the query to a single sub-directory. A STIX 'id' filter
# allows for the fast checking of the file names versus loading it.
file_filters = self._parse_file_filters(query)
# establish which subdirectories can be avoided in query
# by decluding as many as possible. A filter with "type" as the property
# means that certain STIX object types can be ruled out, and thus
# the corresponding subdirectories as well
include_paths = []
declude_paths = []
if "type" in [filter.property for filter in file_filters]:
for filter in file_filters:
if filter.property == "type":
if filter.op == "=":
include_paths.append(
os.path.join(self._stix_dir, filter.value))
elif filter.op == "!=":
declude_paths.append(
os.path.join(self._stix_dir, filter.value))
else:
# have to walk entire STIX directory
include_paths.append(self._stix_dir)
# if a user specifies a "type" filter like "type = <stix-object_type>",
# the filter is reducing the search space to single stix object types
# (and thus single directories). This makes such a filter more powerful
# than "type != <stix-object_type>" bc the latter is substracting
# only one type of stix object type (and thus only one directory),
# As such the former type of filters are given preference over the latter;
# i.e. if both exist in a query, that latter type will be ignored
if not include_paths:
# user has specified types that are not wanted (i.e. "!=")
# so query will look in all STIX directories that are not
# the specified type. Compile correct dir paths
for dir in os.listdir(self._stix_dir):
if os.path.abspath(os.path.join(self._stix_dir,
dir)) not in declude_paths:
include_paths.append(
os.path.abspath(os.path.join(self._stix_dir, dir)))
# grab stix object ID as well - if present in filters, as
# may forgo the loading of STIX content into memory
if "id" in [filter.property for filter in file_filters]:
for filter in file_filters:
if filter.property == "id" and filter.op == "=":
id_ = filter.value
break
else:
id_ = None
else:
id_ = None
# now iterate through all STIX objs
for path in include_paths:
for root, dirs, files in os.walk(path):
for file_ in files:
if not file_.endswith(".json"):
# skip non '.json' files as more likely to be random non-STIX files
continue
if not id_ or id_ == file_.split(".")[0]:
# have to load into memory regardless to evaluate other filters
try:
stix_obj = json.load(
open(os.path.join(root, file_)))
if stix_obj["type"] == "bundle":
stix_obj = stix_obj["objects"][0]
# naive STIX type checking
stix_obj["type"]
stix_obj["id"]
except (ValueError,
KeyError): # likely not a JSON file
raise TypeError(
"STIX JSON object at '{0}' could either not be parsed to "
"JSON or was not valid STIX JSON".format(
os.path.join(root, file_)))
# check against other filters, add if match
all_data.extend(apply_common_filters([stix_obj],
query))
all_data = deduplicate(all_data)
# parse python STIX objects from the STIX object dicts
stix_objs = [
parse(stix_obj_dict,
allow_custom=self.allow_custom,
version=version) for stix_obj_dict in all_data
]
return stix_objs
