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file_encryptor-0.2.9
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مشاهده بیشترتوضیحات
Tool for convergently encrypting files used by MetaDisk.
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | file_encryptor-0.2.9 |
| نام | file_encryptor |
| نسخه کتابخانه | 0.2.9 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | Storj Labs |
| ایمیل نویسنده | hello@storj.io |
| آدرس صفحه اصلی | https://github.com/Storj/file-encryptor |
| آدرس اینترنتی | https://pypi.org/project/file_encryptor/ |
| مجوز | The MIT License (MIT) Copyright (c) 2014 Storj Labs Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
File Encryptor
==============
|Build Status| |Coverage Status| |PyPI version|
This is a library used by MetaDisk to convergently encrypt and decrypt
files. It contains helper methods to encrypt and decrypt files inline
(without using extra space) and to stream decryption.
Installation
------------
You can easily install ``file-encryptor`` using pip:
::
pip install file_encryptor
Usage
-----
Here’s an example to encrypt a file inline using convergent encryption:
.. code:: python
import file_encryptor.convergence
key = convergence.encrypt_inline_file("/path/to/file", None)
You can also specify a passphrase:
.. code:: python
import file_encryptor.convergence
key = convergence.encrypt_inline_file("/path/to/file", "rainbow dinosaur secret")
To decrypt a file inline, you need the key that was returned by the
encrypt method:
.. code:: python
import file_encryptor.convergence
key = convergence.encrypt_inline_file("/path/to/file", "rainbow dinosaur secret")
convergence.decrypt_inline_file("/path/to/file", key)
The reason why you cannot use the passphrase directly is because the key
is derived from both the passphrase and the SHA-256 of the original
file.
For streaming applications, you can decrypt a file with a generator:
.. code:: python
for chunk in convergence.decrypt_generator("/path/to/file", key):
do_something_with_chunk(chunk)
Cryptoconcerns
--------------
The key generation mechanism is the following:
.. code:: python
key = HMAC-SHA256(passphrase, hex(SHA256(file-contents)))
If no passphrase is given, a default is used.
The file itself is encrypted using AES128-CTR, from pycrypto. We’re not
specifying any IV, thinking that for convergent encryption that is the
right thing to do.
Testing
-------
To run tests, execute the following command in the project root:
::
python setup.py test -a "--doctest-modules --pep8 -v tests/"
To run tests with detailed coverage output, execute:
::
coverage run setup.py test -a "--doctest-modules --pep8 -v tests/"
coverage report -m --include="file_encryptor/*"
.. |Build Status| image:: https://travis-ci.org/Storj/file-encryptor.svg
:target: https://travis-ci.org/Storj/file-encryptor
.. |Coverage Status| image:: https://coveralls.io/repos/Storj/file-encryptor/badge.png?branch=master
:target: https://coveralls.io/r/Storj/file-encryptor?branch=master
.. |PyPI version| image:: https://badge.fury.io/py/file_encryptor.svg
:target: http://badge.fury.io/py/file_encryptor
نحوه نصب
نصب پکیج whl file_encryptor-0.2.9:
pip install file_encryptor-0.2.9.whl
نصب پکیج tar.gz file_encryptor-0.2.9:
pip install file_encryptor-0.2.9.tar.gz