116 lines
3.3 KiB
Python
Executable file
116 lines
3.3 KiB
Python
Executable file
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2020 Google LLC
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""DFDewey Command-Line Interface."""
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import argparse
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import logging
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import os
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import sys
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from dfdewey.utils.image_processor import ImageProcessorOptions, ImageProcessor
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from dfdewey.utils.index_searcher import IndexSearcher
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STRING_INDEXING_LOG_INTERVAL = 10000000
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# Setup logging
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log = logging.getLogger('dfdewey')
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class _StringRecord():
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"""Elasticsearch string record.
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Attributes:
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image: Hash to identify the source image of the string
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offset: Byte offset of the string within the source image
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file_offset: If the string is extracted from a compressed stream, the byte
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offset within the stream
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data: The string to be indexed
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"""
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def __init__(self):
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self.image = ''
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self.offset = 0
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self.file_offset = None
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self.data = ''
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def main():
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"""Main DFDewey function."""
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args = parse_args()
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setup_logging()
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if not args.search and not args.search_list:
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# Processing an image since no search terms specified
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if args.image == 'all':
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log.error('Image must be supplied for processing.')
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sys.exit(1)
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image_processor_options = ImageProcessorOptions(
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not args.no_base64, not args.no_gzip, not args.no_zip)
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image_processor = ImageProcessor(
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args.case, os.path.abspath(args.image), image_processor_options)
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image_processor.process_image()
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else:
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index_searcher = IndexSearcher(args.case, args.image)
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if args.search:
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index_searcher.search(args.search)
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elif args.search_list:
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index_searcher.list_search(args.search_list)
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def parse_args():
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"""Argument parsing function.
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Returns:
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Arguments namespace.
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"""
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parser = argparse.ArgumentParser()
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parser.add_argument('case', help='case ID')
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parser.add_argument(
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'image', nargs='?', default='all', help='image file (default: \'all\')')
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# Indexing args
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parser.add_argument(
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'--no_base64', help='don\'t decode base64', action='store_true')
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parser.add_argument(
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'--no_gzip', help='don\'t decompress gzip', action='store_true')
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parser.add_argument(
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'--no_zip', help='don\'t decompress zip', action='store_true')
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# Search args
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parser.add_argument('-s', '--search', help='search query')
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parser.add_argument('--search_list', help='file with search queries')
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args = parser.parse_args()
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return args
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def setup_logging():
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"""Configure the logger."""
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log.propagate = False
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log.setLevel(logging.INFO)
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# Log to stdout
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console_handler = logging.StreamHandler(sys.stdout)
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console_handler.setLevel(logging.INFO)
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formatter = logging.Formatter('[%(levelname)s] %(message)s')
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console_handler.setFormatter(formatter)
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log.addHandler(console_handler)
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if __name__ == '__main__':
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main()
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