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Python-RSA is a pure-Python RSA implementation. It supportsencryption and decryption, signing and verifying signatures, and keygeneration according to PKCS#1 version 1.5. It can be used as a Pythonlibrary as well as on the commandline. The code was mostly written bySybren A. Stüvel.

Documentation can be found at thePython-RSA homepage.

Download and install using:

pip install rsa

or download it from thePython Package Index.

The source code is maintained atGitHub and islicensed under theApache 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 insetup.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._version133
• rsa._version200
• rsa.bigfile
• rsa.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 allsupported versions of Python.

Version 4.0 drops support for Python 2.6 and 3.3.