Pure Python RSA implementation
Python-RSA is a pure-Python RSA implementation. It supports
encryption and decryption, signing and verifying signatures, and key
generation according to PKCS#1 version 1.5. It can be used as a Python
library as well as on the commandline. The code was mostly written by
Sybren A. Stüvel.
Documentation can be found at the Python-RSA homepage. For all changes, check the changelog.
Download and install using:
pip install rsa
or download it from the Python Package Index.
The source code is maintained at GitHub and is
licensed under the Apache License, version 2.0
Security
Because of how Python internally stores numbers, it is very hard (if not impossible) to make a pure-Python program secure against timing attacks. This library is no exception, so use it with care. See https://securitypitfalls.wordpress.com/2018/08/03/constant-time-compare-in-python/ for more info.
Major changes in 4.1
Version 4.0 was the last version to support Python 2 and 3.4. Version 4.1 is compatible with Python 3.5+ only.
Major changes in 4.0
Version 3.4 was the last version in the 3.x range. Version 4.0 drops the following modules,
as they are insecure:
rsa._version133rsa._version200rsa.bigfilersa.varblock
Those modules were marked as deprecated in version 3.4.
Furthermore, in 4.0 the I/O functions is streamlined to always work with bytes on all
supported versions of Python.
Version 4.0 drops support for Python 2.6 and 3.3.