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  1. JDK
  2. JDK-8044215

Unable to initiate SpNego using a S4U2Proxy GSSCredential (Krb5ProxyCredential)

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P4 P4
    • 9
    • 8u5
    • security-libs
    • b36
    • x86
    • windows_2008

        FULL PRODUCT VERSION :
        java version "1.8.0_05"
        Java(TM) SE Runtime Environment (build 1.8.0_05-b13)
        Java HotSpot(TM) 64-Bit Server VM (build 25.5-b02, mixed mode)

        ADDITIONAL OS VERSION INFORMATION :
        Microsoft Windows [Version 6.1.7601]

        A DESCRIPTION OF THE PROBLEM :
        Server account has constrained delegation.
        After SpNego is established with the client, GSSContext.getDelegCred() returns a GSSCredential that is wrapping a Krb5ProxyCredential
        Then, trying to that GSSCredential to create another GSSContext, and call GSSContext.initSecContext. Receives the following exception:
        ...
        Caused by: GSSException: No valid credentials provided (Mechanism level: Failure unspecified at GSS-API level (Mechanism level: Generic error (description in e-text) (60) - Client principal does not match))
          at sun.security.jgss.spnego.SpNegoContext.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at com.mellmo.roambi.http.auth.spnego.SPNEGOAuthScheme.authenticate(SPNEGOAuthScheme.java:368)
          ... 404 more
        Caused by: GSSException: Failure unspecified at GSS-API level (Mechanism level: Generic error (description in e-text) (60) - Client principal does not match)
          at sun.security.jgss.krb5.Krb5Context.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.spnego.SpNegoContext.GSS_initSecContext(Unknown Source)
          ... 408 more
        Caused by: KrbException: Generic error (description in e-text) (60) - Client principal does not match
          at sun.security.krb5.KrbCred.<init>(Unknown Source)
          at sun.security.jgss.krb5.InitialToken$OverloadedChecksum.<init>(Unknown Source)
          at sun.security.jgss.krb5.InitSecContextToken.<init>(Unknown Source)
          ... 412 more

        STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
        Server account has constrained delegation.
        After SpNego is established with the client, GSSContext.getDelegCred() returns a GSSCredential that is wrapping a Krb5ProxyCredential
        Then, trying to that GSSCredential to create another GSSContext, and call GSSContext.initSecContext.

        EXPECTED VERSUS ACTUAL BEHAVIOR :
        EXPECTED -
        expected GSSContext.initSecContext to be successful.
        ACTUAL -
        saw an exception
        ...
        Caused by: GSSException: No valid credentials provided (Mechanism level: Failure unspecified at GSS-API level (Mechanism level: Generic error (description in e-text) (60) - Client principal does not match))
          at sun.security.jgss.spnego.SpNegoContext.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at com.mellmo.roambi.http.auth.spnego.SPNEGOAuthScheme.authenticate(SPNEGOAuthScheme.java:368)
          ... 404 more
        Caused by: GSSException: Failure unspecified at GSS-API level (Mechanism level: Generic error (description in e-text) (60) - Client principal does not match)
          at sun.security.jgss.krb5.Krb5Context.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.GSSContextImpl.initSecContext(Unknown Source)
          at sun.security.jgss.spnego.SpNegoContext.GSS_initSecContext(Unknown Source)
          ... 408 more
        Caused by: KrbException: Generic error (description in e-text) (60) - Client principal does not match
          at sun.security.krb5.KrbCred.<init>(Unknown Source)
          at sun.security.jgss.krb5.InitialToken$OverloadedChecksum.<init>(Unknown Source)
          at sun.security.jgss.krb5.InitSecContextToken.<init>(Unknown Source)
          ... 412 more

        REPRODUCIBILITY :
        This bug can be reproduced always.

        CUSTOMER SUBMITTED WORKAROUND :
        I patched KrbCred.java but removing the following check:
         /*
                if (!serviceTicket.getClient().equals(client))
                    throw new KrbException(Krb5.KRB_ERR_GENERIC,
                                        "Client principal does not match");
                */

        and I was able to proceed.

              weijun Weijun Wang
              webbuggrp Webbug Group
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                Created:
                Updated:
                Resolved: