PyMISP/pymisp/tools/abstractgenerator.py

64 lines
2.7 KiB
Python

#!/usr/bin/env python
from __future__ import annotations
from datetime import datetime, date
from dateutil.parser import parse
from typing import Any
from .. import MISPObject
from ..exceptions import InvalidMISPObject
class AbstractMISPObjectGenerator(MISPObject):
def _detect_epoch(self, timestamp: str | int | float) -> bool:
try:
tmp = float(timestamp)
if tmp < 30000000:
# Assuming the user doesn't want to report anything before datetime(1970, 12, 14, 6, 20)
# The date is most probably in the format 20180301
return False
return True
except ValueError:
return False
def _sanitize_timestamp(self, timestamp: datetime | date | dict[str, Any] | str | int | float | None = None) -> datetime:
if not timestamp:
return datetime.now()
if isinstance(timestamp, datetime):
return timestamp
elif isinstance(timestamp, date):
return datetime.combine(timestamp, datetime.min.time())
elif isinstance(timestamp, dict):
if not isinstance(timestamp['value'], datetime):
timestamp['value'] = parse(timestamp['value'])
return timestamp['value']
else: # Supported: float/int/string
if isinstance(timestamp, (str, int, float)) and self._detect_epoch(timestamp):
# It converts to the *local* datetime, which is consistent with the rest of the code.
return datetime.fromtimestamp(float(timestamp))
elif isinstance(timestamp, str):
return parse(timestamp)
else:
raise Exception(f'Unable to convert {timestamp} to a datetime.')
def generate_attributes(self) -> None:
"""Contains the logic where all the values of the object are gathered"""
if hasattr(self, '_parameters') and self._definition is not None:
for object_relation in self._definition['attributes']:
value = self._parameters.pop(object_relation, None)
if not value:
continue
if isinstance(value, dict):
self.add_attribute(object_relation, **value)
elif isinstance(value, list):
self.add_attributes(object_relation, *value)
else:
# Assume it is the value only
self.add_attribute(object_relation, value=value)
if self._strict and self._known_template and self._parameters:
raise InvalidMISPObject('Some object relations are unknown in the template and could not be attached: {}'.format(', '.join(self._parameters)))