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  1. 368a31f Mark 4.0 as released by Sybren A. Stüvel · 5 weeks ago master version-4.0
  2. 0d13454 Reword README.md for release of 4.0 by Sybren A. Stüvel · 5 weeks ago
  3. 1971c3e Declare Python 3.7 as supported by Sybren A. Stüvel · 5 weeks ago
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Pure Python RSA implementation

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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

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._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 all supported versions of Python.

Version 4.0 drops support for Python 2.6 and 3.3.