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Thread: Kerberos ticket validation - GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)

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    Question Kerberos ticket validation - GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)

    I am a seasoned c# developer have have worked with Java here and there it is fairly similar in many respects. I am struggling to get something that is very simple to do in .net in java ans that is validate a kerberos ticket. i have some simple code that generates a ticket after asking for a username and password and the ticket generation works. I want to then pass this to a server to validate the user coming in but i get the following error:


    Exception in thread "main" GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)
    at sun.security.jgss.GSSHeader.<init>(GSSHeader.java: 97)
    at sun.security.jgss.GSSContextImpl.acceptSecContext( GSSContextImpl.java:306)
    at sun.security.jgss.GSSContextImpl.acceptSecContext( GSSContextImpl.java:285)
    at com.company.KerberosTicketRetriever.retrieveTicket (KerberosTicketRetriever.java:194)
    at com.company.Main.main(Main.java:28)

    On doing research it looks to be like i might need an SPN (service principal name) for the server which i can do but i don't know what the service name is that i need to register that for. I have an Apache Ignite server that i have written a java plugin for that authenticates and authorizes users. The plumbing for that is all working and now i need to get the kerberos validation working but have this issue. If i have to create an SPN what would the service be or can that be anything i make up like "Ignite" for example.


    Lastly, does anyone know if there is an easier way to do a single signon or kerberos authentication. I tried waffle and spnego but that seems to be for web clients.

    thanks Wayne

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    Default Re: Kerberos ticket validation - GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)

    This is a very specific question about using some product. Is there a forum for it?
    I don't know if anyone here has knowledge about that product.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: Kerberos ticket validation - GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)

    its just java code i have the source code for it. All i am trying to do is authenticate kerberos from a client to a service

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    Default Re: Kerberos ticket validation - GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)

    Exception in thread "main" GSSException: Defective token detected (Mechanism level: GSSHeader did not find the right tag)
    What did the API doc say about the exception that was thrown?

    Your description of the problem is a lot of jargon that has no meaning for me.
    Can you break the problem down into a question using java programming terms?
    If you don't understand my answer, don't ignore it, ask a question.

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