import logging
from abc import ABC
from typing import List, Optional
from credsweeper.credentials.candidate import Candidate
from credsweeper.deep_scanner.abstract_scanner import AbstractScanner
from credsweeper.file_handler.data_content_provider import DataContentProvider
logger = logging.getLogger(__name__)
[docs]
class EncoderScanner(AbstractScanner, ABC):
"""Implements recursive iteration when data might be encoded"""
[docs]
def data_scan(
self, #
data_provider: DataContentProvider, #
depth: int, #
recursive_limit_size: int) -> Optional[List[Candidate]]:
"""Tries to decode data from base64 encode to bytes and scan as bytes again"""
if result := data_provider.represent_as_encoded():
decoded_data_provider = DataContentProvider(data=data_provider.decoded,
file_path=data_provider.file_path,
file_type=data_provider.file_type,
info=f"{data_provider.info}|BASE64")
new_limit = recursive_limit_size - len(decoded_data_provider.data)
return self.recursive_scan(decoded_data_provider, depth, new_limit)
return None if result is None else []