My apologies if this has already been discussed somewhere, I have tried a number of searches to see if this is either a known issue or common error on the client side but so far only found references to Java issues that should have been resolved a long time ago.

I have a Red Hat server running in Amazon EC2 with IPA ipa-server-2.1.3-9.el6.x86_64 installed - I have an admin user and a test_user defined.


From my local machine using kinit works without error.

I have developed a test Java client to make use of the Krb5LoginModule, I am currently debugging further but thought I would mail this in parallel in case I am missing something obvious but I keep getting the failure that is at the bottom of this message.

This failure is reported when using java-1.7.0-openjdk-1.7.0.3.x86_64 - however I have also tried using various Oracle JDKs, both 6 and 7.

I know the password is correct as verified using kinit, also if I use jdk1.6.0_30 AND set the system property for Kerberos debugging to true on the client it works.

The only difference I currently see between the failure scenario and success scenario is that for success rc4-hmac is selected for the PA-ENC-TIMESTAMP for the failure scenario here aes256-cts-hmac-sha1-96 is selected instead.

For the work I am currently using IPA for I could just force the use of rc4-hmac but would really like to get to the bottom of the cause of this.

Looking forward to any ideas.

Regards,
Darran Lofthouse.


Exception in thread "main" javax.security.auth.login.LoginException: Integrity check on decrypted field failed (31) - PREAUTH_FAILED at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:759) at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:580)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at javax.security.auth.login.LoginContext.invoke(LoginContext.java:784)
        at 
javax.security.auth.login.LoginContext.access$000(LoginContext.java:203)
        at javax.security.auth.login.LoginContext$5.run(LoginContext.java:721)
        at javax.security.auth.login.LoginContext$5.run(LoginContext.java:719)
        at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.login.LoginContext.invokeCreatorPriv(LoginContext.java:718)
        at javax.security.auth.login.LoginContext.login(LoginContext.java:590)
at com.darranl.as.sasl.gssapi.KerberosLoginUtil.login(KerberosLoginUtil.java:50) at com.darranl.as.sasl.gssapi.KerberosLoginUtil.main(KerberosLoginUtil.java:136) Caused by: KrbException: Integrity check on decrypted field failed (31) - PREAUTH_FAILED
        at sun.security.krb5.KrbAsRep.<init>(KrbAsRep.java:82)
        at sun.security.krb5.KrbAsReqBuilder.send(KrbAsReqBuilder.java:316)
        at sun.security.krb5.KrbAsReqBuilder.action(KrbAsReqBuilder.java:361)
at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:721)
        ... 14 more
Caused by: KrbException: Identifier doesn't match expected value (906)
        at sun.security.krb5.internal.KDCRep.init(KDCRep.java:143)
        at sun.security.krb5.internal.ASRep.init(ASRep.java:65)
        at sun.security.krb5.internal.ASRep.<init>(ASRep.java:60)
        at sun.security.krb5.KrbAsRep.<init>(KrbAsRep.java:60)
        ... 17 more

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