mirror of https://github.com/MISP/PyMISPGalaxies
696 lines
25 KiB
Python
696 lines
25 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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import json
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from json import JSONEncoder
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import os
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import sys
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from collections.abc import Mapping
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from glob import glob
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import re
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from typing import List, Dict, Optional, Any, Tuple, Iterator, overload, Union
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if sys.version_info >= (3, 8):
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from typing import Literal
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else:
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from typing_extensions import Literal
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try:
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import jsonschema # type: ignore
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HAS_JSONSCHEMA = True
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except ImportError:
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HAS_JSONSCHEMA = False
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class EncodeGalaxies(JSONEncoder):
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def default(self, obj: Any) -> Dict[str, str]:
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if isinstance(obj, Galaxy):
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return obj.to_dict()
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return JSONEncoder.default(self, obj)
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class EncodeClusters(JSONEncoder):
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def default(self, obj: Any) -> Dict[str, str]:
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if isinstance(obj, (Cluster, ClusterValue, ClusterValueMeta)):
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return obj.to_dict()
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return JSONEncoder.default(self, obj)
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class PyMISPGalaxiesError(Exception):
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def __init__(self, message: str):
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super(PyMISPGalaxiesError, self).__init__(message)
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self.message = message
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class UnableToRevertMachinetag(PyMISPGalaxiesError):
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pass
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class Galaxy():
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"""
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Represents a galaxy in the PyMISPGalaxies library.
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Attributes:
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galaxy (Dict[str, str]): The dictionary containing the galaxy data.
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type (str): The type of the galaxy.
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name (str): The name of the galaxy.
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icon (str): The icon of the galaxy.
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description (str): The description of the galaxy.
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version (str): The version of the galaxy.
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uuid (str): The UUID of the galaxy.
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namespace (str, optional): The namespace of the galaxy.
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kill_chain_order (str, optional): The kill chain order of the galaxy.
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"""
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def __init__(self, galaxy: Dict[str, str]):
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"""
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Initializes a new instance of the Galaxy class.
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Args:
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galaxy (Dict[str, str]): The dictionary containing the galaxy data.
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"""
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self.galaxy = galaxy
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self.type = self.galaxy['type']
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self.name = self.galaxy['name']
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self.icon = self.galaxy['icon']
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self.description = self.galaxy['description']
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self.version = self.galaxy['version']
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self.uuid = self.galaxy['uuid']
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self.namespace = self.galaxy.pop('namespace', None)
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self.kill_chain_order = self.galaxy.pop('kill_chain_order', None)
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def to_json(self) -> str:
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"""
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Converts the galaxy object to a JSON string.
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Returns:
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str: The JSON representation of the galaxy object.
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"""
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return json.dumps(self, cls=EncodeGalaxies)
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def to_dict(self) -> Dict[str, str]:
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"""
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Converts the galaxy object to a dictionary.
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Returns:
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Dict[str, str]: The dictionary representation of the galaxy object.
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"""
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to_return = {'type': self.type, 'name': self.name, 'description': self.description,
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'version': self.version, 'uuid': self.uuid, 'icon': self.icon}
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if self.namespace:
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to_return['namespace'] = self.namespace
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if self.kill_chain_order:
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to_return['kill_chain_order'] = self.kill_chain_order
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return to_return
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class Galaxies(Mapping): # type: ignore
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"""
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A class representing a collection of MISP galaxies.
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Parameters:
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- galaxies: A list of dictionaries representing the galaxies. Each dictionary should contain the name and other properties of a galaxy.
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If left empty, the galaxies are loaded from the data folder.
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Attributes:
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- galaxies: A dictionary containing the galaxies, where the keys are the names of the galaxies and the values are instances of the Galaxy class.
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- root_dir_galaxies: The root directory of the MISP galaxies.
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Methods:
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- validate_with_schema: Validates the galaxies against the schema.
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- __getitem__: Returns the galaxy with the specified name.
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- __iter__: Returns an iterator over the galaxy names.
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- __len__: Returns the number of galaxies in the collection.
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"""
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def __init__(self, galaxies: List[Dict[str, str]] = []):
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"""
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Initializes a new instance of the Galaxies class.
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Parameters:
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- galaxies: A list of dictionaries representing the galaxies. Each dictionary should contain the name and other properties of a galaxy.
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If left empty, the galaxies are loaded from the data folder.
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"""
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if not galaxies:
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galaxies = []
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self.root_dir_galaxies = os.path.join(os.path.abspath(os.path.dirname(sys.modules['pymispgalaxies'].__file__)), # type: ignore
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'data', 'misp-galaxy', 'galaxies')
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for galaxy_file in glob(os.path.join(self.root_dir_galaxies, '*.json')):
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with open(galaxy_file, 'r') as f:
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galaxies.append(json.load(f))
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self.galaxies = {}
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for galaxy in galaxies:
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self.galaxies[galaxy['name']] = Galaxy(galaxy)
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def validate_with_schema(self) -> None:
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"""
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Validates the galaxies against the schema.
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Raises:
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- ImportError: If the jsonschema module is not installed.
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"""
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if not HAS_JSONSCHEMA:
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raise ImportError('jsonschema is required: pip install jsonschema')
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schema = os.path.join(os.path.abspath(os.path.dirname(sys.modules['pymispgalaxies'].__file__)), # type: ignore
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'data', 'misp-galaxy', 'schema_galaxies.json')
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with open(schema, 'r') as f:
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loaded_schema = json.load(f)
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for g in self.galaxies.values():
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jsonschema.validate(g.galaxy, loaded_schema)
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def __getitem__(self, name: str) -> Galaxy:
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"""
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Returns the galaxy with the specified name.
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Parameters:
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- name: The name of the galaxy.
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Returns:
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- The Galaxy instance with the specified name.
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Raises:
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- KeyError: If the galaxy with the specified name does not exist.
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"""
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return self.galaxies[name]
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def __iter__(self) -> Iterator[str]:
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"""
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Returns an iterator over the galaxy names.
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Returns:
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- An iterator over the galaxy names.
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"""
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return iter(self.galaxies)
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def __len__(self) -> int:
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"""
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Returns the number of galaxies in the collection.
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Returns:
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- The number of galaxies in the collection.
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"""
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return len(self.galaxies)
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class ClusterValueMeta():
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def __init__(self, m: Dict[str, str]):
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self.type = m.pop('type', None)
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self.complexity = m.pop('complexity', None)
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self.effectiveness = m.pop('effectiveness', None)
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self.country = m.pop('country', None)
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self.possible_issues = m.pop('possible_issues', None)
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self.colour = m.pop('colour', None)
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self.motive = m.pop('motive', None)
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self.impact = m.pop('impact', None)
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self.refs = m.pop('refs', None)
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self.synonyms = m.pop('synonyms', None)
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self.derivated_from = m.pop('derivated_from', None)
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self.status = m.pop('status', None)
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self.date = m.pop('date', None)
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self.encryption = m.pop('encryption', None)
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self.extensions = m.pop('extensions', None)
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self.ransomnotes = m.pop('ransomnotes', None)
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# NOTE: meta can have aditional properties. We only load the ones
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# defined on the schema
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self.additional_properties = m
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def to_json(self) -> str:
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return json.dumps(self, cls=EncodeClusters)
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def to_dict(self) -> Dict[str, str]:
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to_return = {}
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if self.type:
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to_return['type'] = self.type
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if self.complexity:
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to_return['complexity'] = self.complexity
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if self.effectiveness:
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to_return['effectiveness'] = self.effectiveness
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if self.country:
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to_return['country'] = self.country
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if self.possible_issues:
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to_return['possible_issues'] = self.possible_issues
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if self.colour:
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to_return['colour'] = self.colour
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if self.motive:
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to_return['motive'] = self.motive
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if self.impact:
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to_return['impact'] = self.impact
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if self.refs:
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to_return['refs'] = self.refs
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if self.synonyms:
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to_return['synonyms'] = self.synonyms
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if self.derivated_from:
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to_return['derivated_from'] = self.derivated_from
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if self.status:
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to_return['status'] = self.status
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if self.date:
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to_return['date'] = self.date
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if self.encryption:
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to_return['encryption'] = self.encryption
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if self.extensions:
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to_return['extensions'] = self.extensions
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if self.ransomnotes:
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to_return['ransomnotes'] = self.ransomnotes
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if self.additional_properties:
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to_return.update(self.additional_properties)
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return to_return
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class ClusterValue():
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"""
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Represents a cluster value.
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Attributes:
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uuid (str): The UUID of the cluster value.
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value (Any): The value of the cluster.
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description (str): The description of the cluster value.
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meta (ClusterValueMeta): The metadata associated with the cluster value.
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searchable (List[str]): A list of searchable terms for the cluster value.
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Methods:
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__init__(self, v: Dict[str, Any]): Initializes a ClusterValue object.
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__init_meta(self, m: Optional[Dict[str, str]]) -> Optional[ClusterValueMeta]: Initializes the metadata for the cluster value.
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to_json(self) -> str: Converts the ClusterValue object to a JSON string.
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to_dict(self) -> Dict[str, Any]: Converts the ClusterValue object to a dictionary.
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"""
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def __init__(self, v: Dict[str, Any]):
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"""
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Initializes a ClusterValue object.
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Args:
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v (Dict[str, Any]): A dictionary containing the cluster value information.
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Raises:
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PyMISPGalaxiesError: If the cluster value is invalid (no value).
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"""
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if not v['value']:
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raise PyMISPGalaxiesError("Invalid cluster (no value): {}".format(v))
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self.uuid = v.get('uuid', None)
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self.value = v['value']
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self.description = v.get('description')
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self.meta = self.__init_meta(v.get('meta'))
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self.searchable = [self.value]
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if self.uuid:
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self.searchable.append(self.uuid)
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if self.meta and self.meta.synonyms:
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self.searchable += self.meta.synonyms
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self.searchable = list(set(self.searchable))
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def __init_meta(self, m: Optional[Dict[str, str]]) -> Optional[ClusterValueMeta]:
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"""
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Initializes the metadata for the cluster value.
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Args:
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m (Optional[Dict[str, str]]): A dictionary containing the metadata for the cluster value.
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Returns:
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Optional[ClusterValueMeta]: The initialized ClusterValueMeta object or None if no metadata is provided.
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"""
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if not m:
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return None
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return ClusterValueMeta(m)
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def to_json(self) -> str:
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"""
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Converts the ClusterValue object to a JSON string.
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Returns:
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str: The JSON representation of the ClusterValue object.
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"""
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return json.dumps(self, cls=EncodeClusters)
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def to_dict(self) -> Dict[str, Any]:
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"""
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Converts the ClusterValue object to a dictionary.
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Returns:
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Dict[str, Any]: The dictionary representation of the ClusterValue object.
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"""
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to_return = {'value': self.value}
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if self.uuid:
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to_return['uuid'] = self.uuid
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if self.description:
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to_return['description'] = self.description
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if self.meta:
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to_return['meta'] = self.meta
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return to_return
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class Cluster(Mapping): # type: ignore
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"""
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Represents a cluster in the PyMISPGalaxies library.
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Attributes:
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cluster (Dict[str, Any]): The dictionary containing the cluster data.
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cluster (str): The name of the existing cluster to load from the data folder.
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name (str): The name of the cluster.
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type (str): The type of the cluster.
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source (str): The source of the cluster.
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authors (str): The authors of the cluster.
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description (str): The description of the cluster.
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uuid (str): The UUID of the cluster.
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version (str): The version of the cluster.
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category (str): The category of the cluster.
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cluster_values (Dict[str, ClusterValue]): A dictionary containing the cluster values, where the keys are the values of the cluster and the values are instances of the ClusterValue class.
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duplicates (List[Tuple[str, str]]): A list of tuples representing duplicate values in the cluster, where each tuple contains the name of the cluster and the duplicate value.
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Methods:
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__init__(self, cluster: Dict[str, Any] | str, skip_duplicates: bool = False): Initializes a Cluster object from a dict or existing cluster file
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search(self, query: str, return_tags: bool = False) -> Union[List[ClusterValue], List[str]]: Searches for values in the cluster that match the given query.
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machinetags(self) -> List[str]: Returns a list of machine tags for the cluster.
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get_by_external_id(self, external_id: str) -> ClusterValue: Returns the cluster value with the specified external ID.
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__str__(self) -> str: Returns a string representation of the cluster.
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__getitem__(self, name: str) -> ClusterValue: Returns the cluster value with the specified name.
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__len__(self) -> int: Returns the number of cluster values in the cluster.
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__iter__(self) -> Iterator[str]: Returns an iterator over the cluster values.
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to_json(self) -> str: Converts the Cluster object to a JSON string.
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to_dict(self) -> Dict[str, Any]: Converts the Cluster object to a dictionary.
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"""
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@overload
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def __init__(self, cluster: str, skip_duplicates: bool = False):
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"""
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Initializes a Cluster object from an existing cluster.
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Args:
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cluster (str): The name of the existing cluster to load from the data folder.
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skip_duplicates (bool, optional): Flag indicating whether to skip duplicate values. Defaults to False.
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"""
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...
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@overload
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def __init__(self, cluster: Dict[str, Any], skip_duplicates: bool = False):
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"""
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Initializes a Cluster object from a dictionary.
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Args:
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cluster (Dict[str, Any]): A dictionary containing the cluster data.
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skip_duplicates (bool, optional): Flag indicating whether to skip duplicate values. Defaults to False.
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"""
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...
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def __init__(self, cluster, skip_duplicates: bool = False):
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if isinstance(cluster, str):
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root_dir_clusters = os.path.join(os.path.abspath(os.path.dirname(sys.modules['pymispgalaxies'].__file__)), 'data', 'misp-galaxy', 'clusters')
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cluster_file = os.path.join(root_dir_clusters, f"{cluster}.json")
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with open(cluster_file, 'r') as f:
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self.__init__(json.load(f), skip_duplicates=skip_duplicates)
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else:
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self.cluster = cluster
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self.name = self.cluster['name']
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self.type = self.cluster['type']
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self.source = self.cluster['source']
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self.authors = self.cluster['authors']
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self.description = self.cluster['description']
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self.uuid = self.cluster['uuid']
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self.version = self.cluster['version']
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self.category = self.cluster['category']
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self.cluster_values = {}
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self.duplicates = []
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try:
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for value in self.cluster['values']:
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new_cluster_value = ClusterValue(value)
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self.add(new_cluster_value, skip_duplicates)
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except KeyError:
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pass
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@overload
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def search(self, query: str, return_tags: Literal[False] = False) -> List[ClusterValue]:
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...
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@overload
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def search(self, query: str, return_tags: Literal[True]) -> List[str]:
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...
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@overload
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def search(self, query: str, return_tags: bool) -> Union[List[ClusterValue], List[str]]:
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...
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def search(self, query: str, return_tags: bool = False) -> Union[List[ClusterValue], List[str]]:
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"""
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Searches for values in the cluster that match the given query.
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Args:
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query (str): The query to search for.
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return_tags (bool, optional): Flag indicating whether to return machine tags instead of cluster values. Defaults to False.
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Returns:
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Union[List[ClusterValue], List[str]]: A list of matching cluster values or machine tags.
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"""
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matching = []
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for v in self.values():
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if [s for s in v.searchable if query.lower() in s.lower()]:
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if return_tags:
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matching.append('misp-galaxy:{}="{}"'.format(self.type, v.value))
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else:
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matching.append(v)
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return matching
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def machinetags(self) -> List[str]:
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"""
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Returns a list of machine tags for the cluster.
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Returns:
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List[str]: A list of machine tags.
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"""
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to_return = []
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for v in self.values():
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to_return.append('misp-galaxy:{}="{}"'.format(self.type, v.value))
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return to_return
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def get_by_external_id(self, external_id: str) -> ClusterValue:
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"""
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Returns the cluster value with the specified external ID.
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Args:
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external_id (str): The external ID to search for.
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Returns:
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ClusterValue: The cluster value with the specified external ID.
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Raises:
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KeyError: If no value with the specified external ID is found.
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"""
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for value in self.cluster_values.values():
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if value.meta and value.meta.additional_properties and value.meta.additional_properties.get('external_id') == external_id:
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return value
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raise KeyError('No value with external_id: {}'.format(external_id))
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@overload
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def add(self, cv: dict, skip_duplicates: bool = False) -> None:
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...
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@overload
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def add(self, cv: ClusterValue, skip_duplicates: bool = False) -> None:
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...
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def add(self, cv, skip_duplicates: bool = False) -> None:
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"""
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Adds a cluster value to the cluster.
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"""
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if isinstance(cv, dict):
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cv = ClusterValue(cv)
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if self.get(cv.value):
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if skip_duplicates:
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self.duplicates.append((self.name, cv.value))
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else:
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raise PyMISPGalaxiesError("Duplicate value ({}) in cluster: {}".format(cv.value, self.name))
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self.cluster_values[cv.value] = cv
|
|
|
|
def __str__(self) -> str:
|
|
"""
|
|
Returns a string representation of the cluster.
|
|
|
|
Returns:
|
|
str: A string representation of the cluster.
|
|
"""
|
|
return '\n'.join(self.machinetags())
|
|
|
|
def __getitem__(self, name: str) -> ClusterValue:
|
|
"""
|
|
Returns the cluster value with the specified name.
|
|
|
|
Args:
|
|
name (str): The name of the cluster value.
|
|
|
|
Returns:
|
|
ClusterValue: The cluster value with the specified name.
|
|
"""
|
|
return self.cluster_values[name]
|
|
|
|
def __len__(self) -> int:
|
|
"""
|
|
Returns the number of cluster values in the cluster.
|
|
|
|
Returns:
|
|
int: The number of cluster values.
|
|
"""
|
|
return len(self.cluster_values)
|
|
|
|
def __iter__(self) -> Iterator[str]:
|
|
"""
|
|
Returns an iterator over the cluster values.
|
|
|
|
Returns:
|
|
Iterator[str]: An iterator over the cluster values.
|
|
"""
|
|
return iter(self.cluster_values)
|
|
|
|
def to_json(self) -> str:
|
|
"""
|
|
Converts the Cluster object to a JSON string.
|
|
|
|
Returns:
|
|
str: The JSON representation of the Cluster object.
|
|
"""
|
|
return json.dumps(self, cls=EncodeClusters)
|
|
|
|
def to_dict(self) -> Dict[str, Any]:
|
|
"""
|
|
Converts the Cluster object to a dictionary.
|
|
|
|
Returns:
|
|
Dict[str, Any]: The dictionary representation of the Cluster object.
|
|
"""
|
|
to_return = {'name': self.name, 'type': self.type, 'source': self.source,
|
|
'authors': self.authors, 'description': self.description,
|
|
'uuid': self.uuid, 'version': self.version, 'category': self.category,
|
|
'values': []}
|
|
to_return['values'] = [v for v in self.values()]
|
|
return to_return
|
|
|
|
|
|
class Clusters(Mapping): # type: ignore
|
|
|
|
def __init__(self, clusters: List[Dict[str, str]] = [], skip_duplicates: bool = False):
|
|
"""
|
|
Allows to interact with a group of clusters.
|
|
|
|
Args:
|
|
clusters (List[Dict[str, str]], optional): A list of dictionaries representing clusters. If left empty, load the clusters from the data folder.
|
|
skip_duplicates (bool, optional): Flag indicating whether to skip duplicate clusters. Defaults to False.
|
|
"""
|
|
if not clusters:
|
|
clusters = []
|
|
self.root_dir_clusters = os.path.join(os.path.abspath(os.path.dirname(sys.modules['pymispgalaxies'].__file__)), # type: ignore
|
|
'data', 'misp-galaxy', 'clusters')
|
|
for cluster_file in glob(os.path.join(self.root_dir_clusters, '*.json')):
|
|
with open(cluster_file, 'r') as f:
|
|
clusters.append(json.load(f))
|
|
self.clusters = {}
|
|
for cluster in clusters:
|
|
self.clusters[cluster['type']] = Cluster(cluster, skip_duplicates=skip_duplicates)
|
|
|
|
def validate_with_schema(self) -> None:
|
|
"""
|
|
Validates the clusters against the schema.
|
|
|
|
Raises:
|
|
ImportError: If jsonschema is not installed.
|
|
"""
|
|
if not HAS_JSONSCHEMA:
|
|
raise ImportError('jsonschema is required: pip install jsonschema')
|
|
schema = os.path.join(os.path.abspath(os.path.dirname(sys.modules['pymispgalaxies'].__file__)), # type: ignore
|
|
'data', 'misp-galaxy', 'schema_clusters.json')
|
|
with open(schema, 'r') as f:
|
|
loaded_schema = json.load(f)
|
|
for c in self.values():
|
|
jsonschema.validate(c.cluster, loaded_schema)
|
|
|
|
def all_machinetags(self) -> List[str]:
|
|
"""
|
|
Returns a list of all machinetags in the clusters.
|
|
|
|
Returns:
|
|
List[str]: A list of machinetags.
|
|
"""
|
|
return [cluster.machinetags() for cluster in self.values()]
|
|
|
|
def revert_machinetag(self, machinetag: str) -> Tuple[Cluster, ClusterValue]:
|
|
"""
|
|
Reverts a machinetag to its original cluster and value.
|
|
|
|
Args:
|
|
machinetag (str): The machinetag to revert.
|
|
|
|
Returns:
|
|
Tuple[Cluster, ClusterValue]: A tuple containing the original cluster and value.
|
|
|
|
Raises:
|
|
UnableToRevertMachinetag: If the machinetag could not be found.
|
|
"""
|
|
try:
|
|
_, cluster_type, cluster_value = re.findall('^([^:]*):([^=]*)="([^"]*)"$', machinetag)[0]
|
|
cluster: Cluster = self[cluster_type]
|
|
value: ClusterValue = cluster[cluster_value]
|
|
return cluster, value
|
|
except Exception:
|
|
raise UnableToRevertMachinetag('The machinetag {} could not be found.'.format(machinetag))
|
|
|
|
def search(self, query: str, return_tags: bool = False) -> List[Tuple[Cluster, str]]:
|
|
"""
|
|
Searches for clusters and values matching the given query.
|
|
|
|
Args:
|
|
query (str): The query to search for.
|
|
return_tags (bool, optional): Flag indicating whether to return the matching tags. Defaults to False.
|
|
|
|
Returns:
|
|
List[Tuple[Cluster, str]]: A list of tuples containing the matching cluster and value.
|
|
|
|
"""
|
|
to_return = []
|
|
for cluster in self.values():
|
|
values = cluster.search(query, return_tags)
|
|
if not values:
|
|
continue
|
|
to_return.append((cluster, values))
|
|
return to_return
|
|
|
|
def __getitem__(self, name: str) -> Cluster:
|
|
"""
|
|
Returns the cluster with the specified name.
|
|
|
|
Args:
|
|
name (str): The name of the cluster.
|
|
|
|
Returns:
|
|
Cluster: The cluster object.
|
|
|
|
Raises:
|
|
KeyError: If the cluster with the specified name does not exist.
|
|
"""
|
|
return self.clusters[name]
|
|
|
|
def __iter__(self) -> Iterator[str]:
|
|
"""
|
|
Returns an iterator over the cluster names.
|
|
|
|
Returns:
|
|
Iterator[str]: An iterator over the cluster names.
|
|
"""
|
|
return iter(self.clusters)
|
|
|
|
def __len__(self) -> int:
|
|
"""
|
|
Returns the number of clusters.
|
|
|
|
Returns:
|
|
int: The number of clusters.
|
|
"""
|
|
return len(self.clusters)
|
|
|
|
def __str__(self) -> str:
|
|
"""
|
|
Returns a string representation of the Clusters object.
|
|
|
|
Returns:
|
|
str: A string representation of the Clusters object.
|
|
"""
|
|
to_print = ''
|
|
for cluster in self.values():
|
|
to_print += '{}\n\n'.format(cluster)
|
|
return to_print
|