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I'm moving an application from WebLogic to JBoss EAP 6.4 and I almost have it working. The issue is that I can only get Kerberos authentication to work if I play with the isInitiator property in my standalone-full-ha.xml for the spnego-server.

If I set isInitiator=true, then I get the error on app-start "Pre-authentication information was invalid".

If I set isInitiator=false, then I get "NTLM specified. Downgraded to Basic Auth (and/or SSL) but downgrade not supported" when I go to the page.

However, if I then go back to isInitiator=true after it had failed with false, it works for a day.

It goes back to "Pre-authentication information was invalid" the next day. I have to attempt to connect with isInitiator=false again to get it to work again.

My standalone-full-ha.xaml looks like this:

 <system-properties>
        <property name="java.net.preferIPv4Stack" value="true"/>
        <property name="org.apache.coyote.http11.Http11Protocol.SERVER" value=""/>
        <property name="java.security.auth.login.config" value="/app/jb-8443/login.conf"/>
        <property name="java.security.krb5.conf" value="/app/jb-8443/krb5.conf"/>
        <property name="sun.security.krb5.debug" value="true"/>
        <property name="jboss.security.disable.secdomain.option" value="true"/>
        <property name="javax.security.auth.useSubjectCredsOnly" value="false"/>
    </system-properties>
...
 <security-domain name="spnego-client" cache-type="default">
                    <authentication>
                        <login-module code="com.sun.security.auth.module.Krb5LoginModule" flag="required"/>
                    </authentication>
                </security-domain>
                <security-domain name="spnego-server" cache-type="default">
                    <authentication>
                        <login-module code="com.sun.security.auth.module.Krb5LoginModule" flag="required">
                            <module-option name="storeKey" value="true"/>
                            <module-option name="useKeyTab" value="true"/>
                            <module-option name="useTicketCache" value="false"/>
                            <module-option name="isInitiator" value="true"/>
                            <module-option name="keyTab" value="/app/jb-8443/krb5.keytab"/>
                            <module-option name="debug" value="true"/>
                            <module-option name="principal" value="JOBSERVICE@FOREST.COMPANY.COM"/>
                            <module-option name="doNotPrompt" value="true"/>
                        </login-module>
                    </authentication>
                </security-domain>
                <security-domain name="com.sun.security.jgss.krb5.initiate" cache-type="default">
                    <authentication>
                        <login-module code="com.sun.security.auth.module.Krb5LoginModule" flag="required">
                            <module-option name="storeKey" value="true"/>
                            <module-option name="useKeyTab" value="true"/>
                            <module-option name="useTicketCache" value="false"/>
                            <module-option name="isInitiator" value="true"/>
                            <module-option name="keyTab" value="/app/jb-8443/krb5.keytab"/>
                            <module-option name="debug" value="true"/>
                            <module-option name="principal" value="JOBSERVICE@FOREST.COMPANY.COM"/>
                            <module-option name="doNotPrompt" value="true"/>
                        </login-module>
                    </authentication>
                </security-domain>
                <security-domain name="com.sun.security.jgss.krb5.accept" cache-type="default">
                    <authentication>
                        <login-module code="com.sun.security.auth.module.Krb5LoginModule" flag="required">
                            <module-option name="storeKey" value="true"/>
                            <module-option name="useKeyTab" value="true"/>
                            <module-option name="useTicketCache" value="false"/>
                            <module-option name="isInitiator" value="true"/>
                            <module-option name="keyTab" value="/app/pyks0app/jb-8443/krb5.keytab"/>
                            <module-option name="debug" value="true"/>
                            <module-option name="principal" value="JOBSERVICE@FOREST.COMPANY.COM"/>
                            <module-option name="doNotPrompt" value="true"/>
                        </login-module>
                    </authentication>
                </security-domain>

The login.conf has:

com.sun.security.jgss.krb5.initiate {
    com.sun.security.auth.module.Krb5LoginModule required
    doNotPrompt=true
    principal="JOBSERVICE@FOREST.COMPANY.COM"
    useKeyTab=true
    useTicketCache=false
    debug=true
    keyTab="/app/jb-8443/krb5.keytab"
    storeKey=true;
};

com.sun.security.jgss.krb5.accept {
    com.sun.security.auth.module.Krb5LoginModule required
    doNotPrompt=true
    principal="JOBSERVICE@FOREST.COMPANY.COM"
    useKeyTab=true
    keyTab="/app/jb-8443/krb5.keytab"
    storeKey=true
    useTicketCache=false
    isInitiator=false
    refreshKrb5Config=true
    moduleBanner=true
    storePass=true;
};
spnego-client {
 com.sun.security.auth.module.Krb5LoginModule required;
};
spnego-server {
 com.sun.security.auth.module.Krb5LoginModule required
 storeKey=true
 useKeyTab=true
 useTicketCache=false
 keyTab="/app/jb-8443/krb5.keytab"
 debug=true
 principal="JOBSERVICE@FOREST.COMPANY.COM"
 doNotPrompt=true;
};

The WebLogic deployment only had the spnego-client and spnego-server parts. I added the com.sun.security.jgss.krb5.initiate and com.sun.security.jgss.krb5.accept parts and after I added them I could connecting using the isInitiator flip trick.

Is there a way around this? Such as skipping pre-authentication if it hadn't connected today? If something cached for only 24h, keep it alive longer?

Are those initiate and accept parts needed on top of the spnego-server?

Jamie Mellway
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0 Answers0