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Re: [mosquitto-dev] Mosquitto SSL Error : Unable to connect (A TLS error occurred.)


Did your broker have a configuration with the same cert file?


For example,


cafile /etc/lora-app-server/certs/CAcert.crt

certfile /etc/lora-app-server/certs/CAcert.crt

keyfile /etc/lora-app-server/certs/CAcert.key


If so, what is your system architecture?


Have a good day.


-----Original Message-----
From: "Cedric VIVES"<cvives@xxxxxxxxxxxxxxxx>
To: <mosquitto-dev@xxxxxxxxxxx>;
Sent: 2018-04-20 (금) 17:37:27
Subject: [mosquitto-dev] Mosquitto SSL Error : Unable to connect (A TLS error occurred.)


I have installed a LoRa Server with the following services :
- MQTT Broker (1.4.15-0mosquitto1~xenial1)
- LoRa-Server
- LoRa-App-Server

On the other side, A raspberry Pi (with raspbian) send data with the LoRa-Gateway-Bridge.

When the connection is unencrypted (tcp://@server on the LoRa-Gateway-Bridge.toml), it works !

However, in ssl :

The client is connected :

1524211792: New connection from on port 8883.
1524211792: New client connected from as 96240ae6-28cb-446c-8dd2-0d2d9f045487 (c1, k30).

But it the server doesn't receive anything because :

mosquitto_sub -h FQDN_OF_MY_SERVER -p 8883 -t "#"  --cafile /etc/lora-app-server/certs/CAcert.crt

=> Unable to connect (A TLS error occurred.)

The mosquitto logs shows :

1524212646: OpenSSL Error: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca
1524212646: OpenSSL Error: error:140940E5:SSL routines:ssl3_read_bytes:ssl handshake failure

For information, it is an official certificate with CN = name of the FQDN of the server.
When i check it by openssl :

openssl s_client -connect FQDN_OF_MY_SERVER:8883 -CAfile /etc/lora-gateway-bridge/certs/CECert.crt

=> Verify return code: 0 (ok)

I have seen in the archive that the same problem occured with older versions but not resolved...have you any advices to fix this issue ?


Cédric VIVES
Pôle Infrastructures Informatiques et Télécommunication 
Centre de Services Numériques
Tél. : +33 (0)5 61 55 93 72
INSA Toulouse 
135 avenue de Rangueil 
31077 Toulouse CEDEX 04

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