https://github.com/jacklinquan/micropython-cryptomsg

A MicroPython module to encrypt and decrypt messages with AES CBC mode.
https://github.com/jacklinquan/micropython-cryptomsg

Last synced: 2 months ago
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A MicroPython module to encrypt and decrypt messages with AES CBC mode.

• Host: GitHub
• URL: https://github.com/jacklinquan/micropython-cryptomsg
• Owner: jacklinquan
• License: mit
• Created: 2020-05-26T04:17:46.000Z (about 4 years ago)
• Default Branch: master
• Last Pushed: 2020-05-26T04:17:54.000Z (about 4 years ago)
• Last Synced: 2024-03-29T20:20:40.826Z (3 months ago)
• Language: Python
• Size: 2.93 KB
• Stars: 5
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-micropython - micropython-cryptomsg - A MicroPython module to encrypt and decrypt messages with AES CBC mode. (Libraries / Communications)

README

        
# micropython-cryptomsg

[![PyPI version](https://badge.fury.io/py/micropython-cryptomsg.svg)](https://badge.fury.io/py/micropython-cryptomsg) [![Downloads](https://pepy.tech/badge/micropython-cryptomsg)](https://pepy.tech/project/micropython-cryptomsg)

A MicroPython module to encrypt and decrypt messages with AES CBC mode.

This module only works under MicroPython and it is tested with MicroPython V1.12.

For a compatible CPython version, please find [Python package cryptomsg](https://github.com/jacklinquan/cryptomsg).

Please consider [![Paypal Donate](https://github.com/jacklinquan/images/blob/master/paypal_donate_button_200x80.png)](https://www.paypal.me/jacklinquan) to support me.

## Installation

``` Python

>>> import upip

>>> upip.install('micropython-cryptomsg')

```

Alternatively just copy cryptomsg.py to the MicroPython device.

## Usage

``` Python

>>> from cryptomsg import CryptoMsg

>>> message = 'YOUR MESSAGE'

>>> # Use default key and iv, not secure.

>>> cipher = CryptoMsg().encrypt_msg(message)

>>> cipher

b"E\xa8\x02\x08\xa3+m\xce'1\xc2\x1c\xa3\xeb\x06\x05"

>>> CryptoMsg().decrypt_msg(cipher)

b'YOUR MESSAGE'

>>> # Only set key, and iv is the same as key.

>>> cipher = CryptoMsg(b'YOUR KEY').encrypt_msg(message)

>>> cipher

b'o\x8e\xa8\x13\xda )\x10zS\xfd\xf5\xae\x90\x95\xfb'

>>> CryptoMsg(b'YOUR KEY').decrypt_msg(cipher)

b'YOUR MESSAGE'

>>> # Set both key and iv, strongest encryption. 

>>> cipher = CryptoMsg(b'YOUR KEY', b'YOUR IV').encrypt_msg(message)

>>> cipher

b'\xbflr\xf6\xae\xc1\xf9W\xfc\xcd&\xf3R\xd3\x8b\xde'

>>> CryptoMsg(b'YOUR KEY', b'YOUR IV').decrypt_msg(cipher)

b'YOUR MESSAGE'

```