mirror of https://github.com/MISP/PyMISP
403 lines
14 KiB
Python
403 lines
14 KiB
Python
#!/usr/bin/env python3
|
|
# -*- coding: utf-8 -*-
|
|
|
|
from datetime import date, datetime
|
|
|
|
from deprecated import deprecated # type: ignore
|
|
from json import JSONEncoder
|
|
from uuid import UUID
|
|
from abc import ABCMeta
|
|
|
|
try:
|
|
from rapidjson import load # type: ignore
|
|
from rapidjson import loads # type: ignore
|
|
from rapidjson import dumps # type: ignore
|
|
HAS_RAPIDJSON = True
|
|
except ImportError:
|
|
from json import load
|
|
from json import loads
|
|
from json import dumps
|
|
HAS_RAPIDJSON = False
|
|
|
|
import logging
|
|
from enum import Enum
|
|
from typing import Union, Optional, Any, Dict, List, Set, Mapping
|
|
|
|
from .exceptions import PyMISPInvalidFormat, PyMISPError
|
|
|
|
|
|
from collections.abc import MutableMapping
|
|
from functools import lru_cache
|
|
from pathlib import Path
|
|
|
|
logger = logging.getLogger('pymisp')
|
|
|
|
resources_path = Path(__file__).parent / 'data'
|
|
misp_objects_path = resources_path / 'misp-objects' / 'objects'
|
|
with (resources_path / 'describeTypes.json').open('r') as f:
|
|
describe_types = load(f)['result']
|
|
|
|
|
|
class MISPFileCache(object):
|
|
# cache up to 150 JSON structures in class attribute
|
|
|
|
@staticmethod
|
|
@lru_cache(maxsize=150)
|
|
def _load_json(path: Path) -> Union[dict, None]:
|
|
if not path.exists():
|
|
return None
|
|
with path.open('r', encoding='utf-8') as f:
|
|
data = load(f)
|
|
return data
|
|
|
|
|
|
class Distribution(Enum):
|
|
your_organisation_only = 0
|
|
this_community_only = 1
|
|
connected_communities = 2
|
|
all_communities = 3
|
|
sharing_group = 4
|
|
inherit = 5
|
|
|
|
|
|
class ThreatLevel(Enum):
|
|
high = 1
|
|
medium = 2
|
|
low = 3
|
|
undefined = 4
|
|
|
|
|
|
class Analysis(Enum):
|
|
initial = 0
|
|
ongoing = 1
|
|
completed = 2
|
|
|
|
|
|
def _int_to_str(d: Dict[str, Any]) -> Dict[str, Any]:
|
|
# transform all integer back to string
|
|
for k, v in d.items():
|
|
if isinstance(v, dict):
|
|
d[k] = _int_to_str(v)
|
|
elif isinstance(v, int) and not isinstance(v, bool):
|
|
d[k] = str(v)
|
|
return d
|
|
|
|
|
|
@deprecated(reason=" Use method default=pymisp_json_default instead of cls=MISPEncode", version='2.4.117', action='default')
|
|
class MISPEncode(JSONEncoder):
|
|
def default(self, obj):
|
|
if isinstance(obj, AbstractMISP):
|
|
return obj.jsonable()
|
|
elif isinstance(obj, (datetime, date)):
|
|
return obj.isoformat()
|
|
elif isinstance(obj, Enum):
|
|
return obj.value
|
|
elif isinstance(obj, UUID):
|
|
return str(obj)
|
|
return JSONEncoder.default(self, obj)
|
|
|
|
|
|
class AbstractMISP(MutableMapping, MISPFileCache, metaclass=ABCMeta):
|
|
__resources_path = resources_path
|
|
__misp_objects_path = misp_objects_path
|
|
__describe_types = describe_types
|
|
|
|
def __init__(self, **kwargs):
|
|
"""Abstract class for all the MISP objects.
|
|
NOTE: Every method in every classes inheriting this one are doing
|
|
changes in memory and do not modify data on a remote MISP instance.
|
|
To do so, you need to call the respective add_* or update_*
|
|
methods in ExpandedPyMISP/PyMISP.
|
|
"""
|
|
super().__init__()
|
|
self.__edited: bool = True # As we create a new object, we assume it is edited
|
|
self.__not_jsonable: List[str] = []
|
|
self._fields_for_feed: Set
|
|
self.__self_defined_describe_types: Optional[Dict] = None
|
|
self.uuid: str
|
|
|
|
if kwargs.get('force_timestamps') is not None:
|
|
# Ignore the edited objects and keep the timestamps.
|
|
self.__force_timestamps: bool = True
|
|
else:
|
|
self.__force_timestamps: bool = False
|
|
|
|
@property
|
|
def describe_types(self) -> Dict:
|
|
if self.__self_defined_describe_types:
|
|
return self.__self_defined_describe_types
|
|
return self.__describe_types
|
|
|
|
@describe_types.setter
|
|
def describe_types(self, describe_types: Dict):
|
|
self.__self_defined_describe_types = describe_types
|
|
|
|
@property
|
|
def resources_path(self) -> Path:
|
|
return self.__resources_path
|
|
|
|
@property
|
|
def misp_objects_path(self) -> Path:
|
|
return self.__misp_objects_path
|
|
|
|
@misp_objects_path.setter
|
|
def misp_objects_path(self, misp_objects_path: Union[str, Path]):
|
|
if isinstance(misp_objects_path, str):
|
|
misp_objects_path = Path(misp_objects_path)
|
|
self.__misp_objects_path = misp_objects_path
|
|
|
|
def from_dict(self, **kwargs) -> None:
|
|
"""Loading all the parameters as class properties, if they aren't `None`.
|
|
This method aims to be called when all the properties requiring a special
|
|
treatment are processed.
|
|
Note: This method is used when you initialize an object with existing data so by default,
|
|
the class is flaged as not edited."""
|
|
for prop, value in kwargs.items():
|
|
if value is None:
|
|
continue
|
|
setattr(self, prop, value)
|
|
# We load an existing dictionary, marking it an not-edited
|
|
self.__edited = False
|
|
|
|
def update_not_jsonable(self, *args) -> None:
|
|
"""Add entries to the __not_jsonable list"""
|
|
self.__not_jsonable += args
|
|
|
|
def set_not_jsonable(self, args: List[str]) -> None:
|
|
"""Set __not_jsonable to a new list"""
|
|
self.__not_jsonable = args
|
|
|
|
def _remove_from_not_jsonable(self, *args) -> None:
|
|
"""Remove the entries that are in the __not_jsonable list"""
|
|
for entry in args:
|
|
try:
|
|
self.__not_jsonable.remove(entry)
|
|
except ValueError:
|
|
pass
|
|
|
|
def from_json(self, json_string: str) -> None:
|
|
"""Load a JSON string"""
|
|
self.from_dict(**loads(json_string))
|
|
|
|
def to_dict(self) -> Dict:
|
|
"""Dump the class to a dictionary.
|
|
This method automatically removes the timestamp recursively in every object
|
|
that has been edited is order to let MISP update the event accordingly."""
|
|
is_edited = self.edited
|
|
to_return = {}
|
|
for attribute, val in self.items():
|
|
if val is None:
|
|
continue
|
|
elif isinstance(val, list) and len(val) == 0:
|
|
continue
|
|
elif isinstance(val, str):
|
|
val = val.strip()
|
|
if attribute == 'timestamp':
|
|
if not self.__force_timestamps and is_edited:
|
|
# In order to be accepted by MISP, the timestamp of an object
|
|
# needs to be either newer, or None.
|
|
# If the current object is marked as edited, the easiest is to
|
|
# skip the timestamp and let MISP deal with it
|
|
continue
|
|
else:
|
|
val = self._datetime_to_timestamp(val)
|
|
if (attribute in ['first_seen', 'last_seen', 'datetime']
|
|
and isinstance(val, datetime)
|
|
and not val.tzinfo):
|
|
# Need to make sure the timezone is set. Otherwise, it will be processed as UTC on the server
|
|
val = val.astimezone()
|
|
|
|
to_return[attribute] = val
|
|
to_return = _int_to_str(to_return)
|
|
return to_return
|
|
|
|
def jsonable(self) -> Dict:
|
|
"""This method is used by the JSON encoder"""
|
|
return self.to_dict()
|
|
|
|
def _to_feed(self) -> Dict:
|
|
if not hasattr(self, '_fields_for_feed') or not self._fields_for_feed:
|
|
raise PyMISPError('Unable to export in the feed format, _fields_for_feed is missing.')
|
|
if hasattr(self, '_set_default') and callable(self._set_default): # type: ignore
|
|
self._set_default() # type: ignore
|
|
to_return = {}
|
|
for field in self._fields_for_feed:
|
|
if getattr(self, field, None) is not None:
|
|
if field in ['timestamp', 'publish_timestamp']:
|
|
to_return[field] = self._datetime_to_timestamp(getattr(self, field))
|
|
elif isinstance(getattr(self, field), (datetime, date)):
|
|
to_return[field] = getattr(self, field).isoformat()
|
|
else:
|
|
to_return[field] = getattr(self, field)
|
|
else:
|
|
if field in ['data', 'first_seen', 'last_seen', 'deleted']:
|
|
# special fields
|
|
continue
|
|
raise PyMISPError('The field {} is required in {} when generating a feed.'.format(field, self.__class__.__name__))
|
|
to_return = _int_to_str(to_return)
|
|
return to_return
|
|
|
|
def to_json(self, sort_keys: bool = False, indent: Optional[int] = None) -> str:
|
|
"""Dump recursively any class of type MISPAbstract to a json string"""
|
|
return dumps(self, default=pymisp_json_default, sort_keys=sort_keys, indent=indent)
|
|
|
|
def __getitem__(self, key):
|
|
try:
|
|
if key[0] != '_' and key not in self.__not_jsonable:
|
|
return self.__dict__[key]
|
|
raise KeyError
|
|
except AttributeError:
|
|
# Expected by pop and other dict-related methods
|
|
raise KeyError
|
|
|
|
def __setitem__(self, key, value):
|
|
setattr(self, key, value)
|
|
|
|
def __delitem__(self, key):
|
|
delattr(self, key)
|
|
|
|
def __iter__(self):
|
|
'''When we call **self, skip keys:
|
|
* starting with _
|
|
* in __not_jsonable
|
|
* timestamp if the object is edited *unless* it is forced
|
|
'''
|
|
return iter({k: v for k, v in self.__dict__.items()
|
|
if not (k[0] == '_'
|
|
or k in self.__not_jsonable
|
|
or (not self.__force_timestamps and (k == 'timestamp' and self.__edited)))})
|
|
|
|
def __len__(self) -> int:
|
|
return len([k for k in self.__dict__.keys() if not (k[0] == '_' or k in self.__not_jsonable)])
|
|
|
|
@property
|
|
def edited(self) -> bool:
|
|
"""Recursively check if an object has been edited and update the flag accordingly
|
|
to the parent objects"""
|
|
if self.__edited:
|
|
return self.__edited
|
|
for p, val in self.items():
|
|
if isinstance(val, AbstractMISP) and val.edited:
|
|
self.__edited = True
|
|
break
|
|
elif isinstance(val, list) and all(isinstance(a, AbstractMISP) for a in val):
|
|
if any(a.edited for a in val):
|
|
self.__edited = True
|
|
break
|
|
return self.__edited
|
|
|
|
@edited.setter
|
|
def edited(self, val: bool):
|
|
"""Set the edit flag"""
|
|
if isinstance(val, bool):
|
|
self.__edited = val
|
|
else:
|
|
raise PyMISPError('edited can only be True or False')
|
|
|
|
def __setattr__(self, name: str, value: Any):
|
|
if name[0] != '_' and not self.__edited and name in self:
|
|
# The private members don't matter
|
|
# If we already have a key with that name, we're modifying it.
|
|
self.__edited = True
|
|
super().__setattr__(name, value)
|
|
|
|
def _datetime_to_timestamp(self, d: Union[int, float, str, datetime]) -> int:
|
|
"""Convert a datetime object to a timestamp (int)"""
|
|
if isinstance(d, (int, float, str)):
|
|
# Assume we already have a timestamp
|
|
return int(d)
|
|
return int(d.timestamp())
|
|
|
|
def _add_tag(self, tag: Optional[Union[str, 'MISPTag', Mapping]] = None, **kwargs):
|
|
"""Add a tag to the attribute (by name or a MISPTag object)"""
|
|
if isinstance(tag, str):
|
|
misp_tag = MISPTag()
|
|
misp_tag.from_dict(name=tag)
|
|
elif isinstance(tag, MISPTag):
|
|
misp_tag = tag
|
|
elif isinstance(tag, dict):
|
|
misp_tag = MISPTag()
|
|
misp_tag.from_dict(**tag)
|
|
elif kwargs:
|
|
misp_tag = MISPTag()
|
|
misp_tag.from_dict(**kwargs)
|
|
else:
|
|
raise PyMISPInvalidFormat(f"The tag is in an invalid format (can be either string, MISPTag, or an expanded dict): {tag}")
|
|
if misp_tag not in self.tags: # type: ignore
|
|
self.Tag.append(misp_tag)
|
|
self.edited = True
|
|
return misp_tag
|
|
|
|
def _set_tags(self, tags: List['MISPTag']):
|
|
"""Set a list of prepared MISPTag."""
|
|
if all(isinstance(x, MISPTag) for x in tags):
|
|
self.Tag = tags
|
|
else:
|
|
raise PyMISPInvalidFormat('All the attributes have to be of type MISPTag.')
|
|
|
|
def __eq__(self, other) -> bool:
|
|
if isinstance(other, AbstractMISP):
|
|
return self.to_dict() == other.to_dict()
|
|
elif isinstance(other, dict):
|
|
return self.to_dict() == other
|
|
else:
|
|
return False
|
|
|
|
def __repr__(self) -> str:
|
|
return '<{self.__class__.__name__} - please define me>'.format(self=self)
|
|
|
|
|
|
class MISPTag(AbstractMISP):
|
|
|
|
_fields_for_feed: set = {'name', 'colour'}
|
|
|
|
def __init__(self, **kwargs):
|
|
super().__init__(**kwargs)
|
|
self.name: str
|
|
self.exportable: bool
|
|
|
|
def from_dict(self, **kwargs):
|
|
if kwargs.get('Tag'):
|
|
kwargs = kwargs.get('Tag')
|
|
super().from_dict(**kwargs)
|
|
|
|
def _set_default(self):
|
|
if not hasattr(self, 'colour'):
|
|
self.colour = '#ffffff'
|
|
|
|
def _to_feed(self) -> Dict:
|
|
if hasattr(self, 'exportable') and not self.exportable:
|
|
return {}
|
|
return super()._to_feed()
|
|
|
|
def delete(self):
|
|
self.deleted = True
|
|
self.edited = True
|
|
|
|
def __repr__(self) -> str:
|
|
if hasattr(self, 'name'):
|
|
return '<{self.__class__.__name__}(name={self.name})>'.format(self=self)
|
|
return '<{self.__class__.__name__}(NotInitialized)>'.format(self=self)
|
|
|
|
|
|
if HAS_RAPIDJSON:
|
|
def pymisp_json_default(obj: Union[AbstractMISP, datetime, date, Enum, UUID]) -> Union[Dict, str]:
|
|
if isinstance(obj, AbstractMISP):
|
|
return obj.jsonable()
|
|
elif isinstance(obj, (datetime, date)):
|
|
return obj.isoformat()
|
|
elif isinstance(obj, Enum):
|
|
return obj.value
|
|
elif isinstance(obj, UUID):
|
|
return str(obj)
|
|
else:
|
|
def pymisp_json_default(obj: Union[AbstractMISP, datetime, date, Enum, UUID]) -> Union[Dict, str]:
|
|
if isinstance(obj, AbstractMISP):
|
|
return obj.jsonable()
|
|
elif isinstance(obj, (datetime, date)):
|
|
return obj.isoformat()
|
|
elif isinstance(obj, Enum):
|
|
return obj.value
|
|
elif isinstance(obj, UUID):
|
|
return str(obj)
|