mprsa: A MicroPython module for working with RSA keys

[git-n-pissed]

I've been needing RSA support for a while, and while several existing modules came close to giving me what I wanted, none fulfilled all my criteria, so I ended up making my own called mprsa. From the read me:

Description

This module is a mash-up of python-rsa, Toms Fast Math (ported to MicroPython by Damiano Mazzella, the author of ucrypto), and python-asn1. The goal was to create a MicroPython module that would:

1. Be simple to use
2. Support loading/exporting RSA keys in common formats/structures
3. Support generation of new keys
4. Support signing/verification with blinding using common hashing algorithms
5. Support encryption/decryption with blinding

Supported Key Formats

• Private:

  • PKCS#1 DER
  • PKCS#1 PEM
  • PKCS#8 DER
  • PKCS#8 PEM

• Public:

  • PKCS#1 DER
  • PKCS#1 PEM
  • X.509/SPKI DER
  • X.509/SPKI PEM

The OpenSSL commands used to generate supported keys are contained in the docstrings for the functions that operate on those keys.

Supported Hashing Algorithms

• SHA-1
• SHA-256

Check it out if you want. At this point I've only tested it on an ESP32-S3, so if you end up playing around with it and have the chance to run the test.py file on some other hardware and can confirm it works, let me know.

https://github.com/git-n-pissed/mprsa