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arnaud239955
arnaud239955
Associate III
July 21, 2016
Question

ERROR: SSL/TLS Error: Unable to connect (-112)

  • July 21, 2016
  • 2 replies
  • 848 views
Posted on July 21, 2016 at 13:33

Hello,

I managed to setup a full mutual auth TLS system with SPWF01Sx and Nginx server.

I have reliability problems to open the socket. Sometimes, the socket opens without problem, sometimes opening fails and I get the error -112.

Looking at Nginx logs, the connexion doesn't reach the server, so the problem seems to be on the device connection.

Is there a detailed description of possible causes of error -112 ?

Any advice on how to debug the issue is welcome.

Best regards

Zirco

#error-ssl/tls-mutual-auth
    This topic has been closed for replies.

    2 replies

    Gerardo GALLUCCI
    Gerardo GALLUCCI
    ST Employee
    July 22, 2016
    Posted on July 22, 2016 at 08:28

    Hi Z,

    I think you are facing some low RAM problems. -112 indicates a failure on security algorithm, probably due to big certificates in size (are you using RSA?). If you really need mutual authentication:

    - use ECC in place of RSA

    - use smaller certificates

    - monitor free_heap before a secured&mutual sockon

    Ciao

    jerry

    arnaud239955
    arnaud239955Author
    Associate III
    July 22, 2016
    Posted on July 22, 2016 at 16:02

    Hello Jerry

    Thanks you for your answer.

    I moved to ECC keys and the problem disappeared. So this issue is closed.

    Best regards

    Zirco

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