nrf Mesh Sniffer Android Export - Unencrypted

[jm_solar]

We are using the nrf mesh sniffer android app to record logs of our mesh network to try and track down some weird behaviors possibly related to the messages being sent. The devices in question are not accessible for logging when the behavior occurs, thus the external logging. 

The issue is proving to be potentially more complex interactions than can be manually analyzed from looking at the logs in the app. So I exported the logs from the app planning to analyze them with a python script or other data tool.  However the export seems to be only the raw data, not the unencrypted message contents. 

How do I export the message contents or decrypt the raw data json file on a pc?

[Hung Bui]

Hi Jonathan, 

I checked internally and got the following reply: 

The exported data contain a json with raw data and key values. Users would need to export the data and write own sw to decrypt the cells based on the Bluetooth Mesh specification. Some hint may be found in the nRF Mesh app (iOS): https://github.com/NordicSemiconductor/IOS-nRF-Mesh-Library/blob/main/Library/Crypto/Crypto.swift

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Unfortunately we don't have a guide on how you can decrypt it on a PC. 

[jm_solar]

Thanks for the response, is it possible to file this as a feature request for that app? Seems like if you have it unencrypted in the app it should be easy to export in that format as well. 

[Aleksander Nowakowski]

Hi, thank you for the feedback. We have added it to backlog. Unfortunately I can't promise any resolution dates.