mirror of https://github.com/CIRCL/PyCIRCLean
138 lines
6.0 KiB
Markdown
138 lines
6.0 KiB
Markdown
[](https://travis-ci.org/CIRCL/PyCIRCLean)
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[](https://codecov.io/github/CIRCL/PyCIRCLean?branch=master)
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# PyCIRCLean
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PyCIRCLean is the core Python code used by [CIRCLean](https://github.com/CIRCL/Circlean/), an open-source
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USB key and document sanitizer created by [CIRCL](https://www.circl.lu/). This module has been separated from the
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device-specific scripts and can be used for dedicated security applications to sanitize documents from hostile environments
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to trusted environments. PyCIRCLean is currently Python 3.6+ compatible. Also, while [kittengroomer](./kittengroomer) can
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run on any platform supported by python-magic/libmagic, [filecheck.py](./filecheck/filecheck.py) has some dependencies that
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are Linux-only, and running the full test suite will require access to a Linux box or VM.
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# Installation
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~~~
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git clone https://github.com/CIRCL/PyCIRCLean.git
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cd PyCIRCLean
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pip3 install -e .
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~~~
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# How to use PyCIRCLean
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PyCIRCLean is a simple Python library to handle file checking and sanitization.
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PyCIRCLean is designed to be extended to cover specific checking
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and sanitization workflows in different organizations such as industrial
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environments or restricted/classified ICT environments. A series of practical examples utilizing PyCIRCLean can be found
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in the [./examples](./examples) directory. Note: for commits beyond version 2.2.0 these
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examples are out of date and not guaranteed to work with the PyCIRCLean API. Please check [helpers.py](./kittengroomer/
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helpers.py) or [filecheck.py](./filecheck/filecheck.py) to see the new API interface.
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The following simple example using PyCIRCLean will only copy files with a .conf extension matching the 'text/plain'
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mimetype. If any other file is found in the source directory, the files won't be copied to the destination directory.
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~~~python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import os
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import magic
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from kittengroomer import FileBase, KittenGroomerBase, main
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# Extension
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class Config:
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configfiles = {'.conf': 'text/plain'}
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class FileSpec(FileBase):
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def __init__(self, src_path, dst_path):
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"""Init file object, set the extension."""
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super(FileSpec, self).__init__(src_path, dst_path)
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self.valid_files = {}
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# The initial version will only accept the file extensions/mimetypes listed here.
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self.valid_files.update(Config.configfiles)
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def check(self):
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valid = True
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expected_mime = self.valid_files.get(self.extension)
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if expected_mime is None:
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# Unexpected extension => disallowed
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valid = False
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compare_ext = 'Extension: {} - Expected: {}'.format(self.cur_file.extension, ', '.join(self.valid_files.keys()))
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elif self.mimetype != expected_mime:
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# Unexpected mimetype => disallowed
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valid = False
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compare_mime = 'Mime: {} - Expected: {}'.format(self.cur_file.mimetype, expected_mime)
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else:
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self.should_copy = False
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if self.should_copy:
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self.safe_copy()
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class KittenGroomerSpec(KittenGroomerBase):
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def __init__(self, root_src=None, root_dst=None):
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"""Initialize the basics of the copy."""
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if root_src is None:
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root_src = os.path.join(os.sep, 'media', 'src')
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if root_dst is None:
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root_dst = os.path.join(os.sep, 'media', 'dst')
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super(KittenGroomerSpec, self).__init__(root_src, root_dst)
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def processdir(self):
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"""Main function doing the processing."""
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to_copy = []
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error = []
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for srcpath in self.list_all_files(self.src_root_dir):
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dstpath = srcpath.replace(self.src_root_dir, self.dst_root_dir)
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cur_file = FileSpec(srcpath, dstpath)
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cur_file.check()
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if __name__ == '__main__':
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main(KittenGroomerSpec, ' Only copy some files, returns an error is anything else is found')
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~~~
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# How to contribute
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We welcome contributions (including bug fixes and new example file processing
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workflows) via pull requests. We are particularly interested in any new workflows
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that can be used to improve security in different organizations. If you see any
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potential enhancements required to support your sanitization workflow, please feel
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free to open an issue. Read [CONTRIBUTING.md](/CONTRIBUTING.md) for more
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information.
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# License
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~~~
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Copyright (C) 2013-2015 Raphaël Vinot
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Copyright (C) 2013-2015 CIRCL - Computer Incident Response Center Luxembourg (℅ smile gie)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of the organization nor the names of its contributors
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may be used to endorse or promote products derived from this software
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without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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~~~
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