import logging
import lzma
from abc import ABC
from pathlib import Path
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
from credsweeper.utils.util import Util
logger = logging.getLogger(__name__)
[docs]
class LzmaScanner(AbstractScanner, ABC):
"""Implements lzma scanning"""
[docs]
def data_scan(
self, #
data_provider: DataContentProvider, #
depth: int, #
recursive_limit_size: int) -> Optional[List[Candidate]]:
"""Extracts data from lzma archive and launches data_scan"""
try:
file_path = Path(data_provider.file_path)
new_path = file_path.as_posix()
if ".xz" == file_path.suffix:
new_path = new_path[:-3]
elif ".lzma" == file_path.suffix:
new_path = new_path[:-5]
lzma_content_provider = DataContentProvider(data=lzma.decompress(data_provider.data),
file_path=new_path,
file_type=Util.get_extension(new_path),
info=f"{data_provider.info}|LZMA:{file_path}")
new_limit = recursive_limit_size - len(lzma_content_provider.data)
lzma_candidates = self.recursive_scan(lzma_content_provider, depth, new_limit)
return lzma_candidates
except Exception as lzma_exc:
logger.error(f"{data_provider.file_path}:{lzma_exc}")
return None