python-lora
Python wrapper for LoRa payloads from Thingpark/Actility, allowing decryption of the payload.
- Depends on cryptography
- Based on crypto code in Lora-net/LoRaMac-node
- Tested with python 2.7, 3.6, 3.7, 3.8, 3.9
- Available on pypi
Usage
pip install python-lora
cryptography requires cffi which in turn requires libffi-dev and python-dev.
from lora.payload import LoRaPayload
xmlstr = '''<?xml version="1.0" encoding="UTF-8"?>
<DevEUI_uplink xmlns="http://uri.actility.com/lora">[...]
<FCntUp>2</FCntUp>[...]
<payload_hex>[...]</payload_hex>[...]
</DevEUI_uplink>'''
payload = LoRaPayload(xmlstr)
key = 'AABBCCDDEEFFAABBCCDDEEFFAABBCCDD'
dev_addr = '00112233'
plaintext = payload.decrypt(key, dev_addr)
You can also use loramac_decrypt without the XML wrapper to decode a hex-encoded FRMPayload:
>>> from lora.crypto import loramac_decrypt
>>> payload = '11daf7a44d5e2bbe557176e9e6c8da'
>>> sequence_counter = 2
>>> key = 'AABBCCDDEEFFAABBCCDDEEFFAABBCCDD'
>>> dev_addr = '00112233'
>>> loramac_decrypt(payload, sequence_counter, key, dev_addr)
[222, 59, 24, 8, 7, 155, 237, 158, 103, 125, 93, 34, 161, 204, 33]
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