ca certificate format

[martinadolfi]

Is this a bug or a feature request?

Somewhere between a bug, a feature, and some info on the docs I guess ;)

What did you expect?

Well, I don´t know what file format to use for the --mqtt-ca-cert option

What happened?

I used pem and der format for the CA, but I got this error:

ERRO[0000] could not setup mqtt backend, retry in 2 seconds: Network Error : x509: certificate signed by unknown authority

Also, just to try, I passed any other file (not a certificate, i.e. the start.sh file suggested for kelink), and it gives the same error, it doesn't tell me there's an error on the certificate itself.

What version are your using?

lora-gateway-bridge version 2.1.5

How can your issue be reproduced?

Just try to use the --mqtt-ca-cert option not knowing the right certificate format ;)

/user/lora-gateway-bridge/bin/lora-gateway-bridge --mqtt-server ssl://dev-marting-3.exo.local:1883 --mqtt-ca-cert /user/lora-gateway-bridge/certnew.cer

Could you share your log output?

/user/lora-gateway-bridge/bin/lora-gateway-bridge --mqtt-server ssl://dev-marting-3.exo.local:1883 --mqtt-ca-cert /user/lora-gateway-bridge/certnew.cer
INFO[0000] starting LoRa Gateway Bridge                  docs="https://docs.loraserver.io/lora-gateway-bridge/" version=2.1.5
INFO[0000] backend: connecting to mqtt broker            server="ssl://dev-marting-3.exo.local:1883"
ERRO[0000] could not setup mqtt backend, retry in 2 seconds: Network Error : x509: certificate signed by unknown authority
INFO[0002] backend: connecting to mqtt broker            server="ssl://dev-marting-3.exo.local:1883"
ERRO[0002] could not setup mqtt backend, retry in 2 seconds: Network Error : x509: certificate signed by unknown authority

[brocaar]

This was implemented in #42. @minggi or @siscia could you give an answer on the above question?

[siscia]

I believe that the problem is that the certificate is signed by an unknown autority.
#42 just add a certificate to the list of certificate to check.

Then I believe, don't quote me on this one, that is the MQTT library that check if the certificates is "correct"...