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.
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
Version 4.1 dropped support for Python 2.7, and soon after that version 4.2 was released. Neither of the two made it explicit in setup.cfg that Python 3.5 or newer is required. This caused issues on Python 2.7, as Pip happily upgraded to the new version.
Version 4.3 is a re-tagged release of version 4.0. It is the last to support Python 2.7.
Version 4.4 will be a re-tagged release of version 4.2, and explicitly require Python 3.5 or newer.
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.