MQTT security with JWT

[J0sh1101]

Hey, 

With the current mqtt_client library, you can secure your data with an x509 certificate. Is there a way to use a JWT token for authentication?( I have seen that the JWT is already implemented for the nRF CLoud API calls.) There are also quite a few MQTT brokers that support JWT authentication. 

https://www.emqx.io/mqtt-security 

https://www.hivemq.com/blog/mqtt-security-fundamentals-oauth-2-0-mqtt/ 

Thanks!

[Didrik Rokhaug]

Hi,

The JWT is just used as the username or password, so there is nothing stopping you from using JWTs with MQTT in NCS.

Just note that the mqtt_helper library doesn't support setting the password field (per NCS 2.5.0), so if you need to use that field, you must either modify the mqtt_helper library, or use the mqtt_client library directly.

Best regards,

Didrik