BadCredentialsException: Kerberos validation not succesfull - spring

Question

I would like to perform authentification with SPNEGO. I use:
spring-core-3.1.0.RELEASE.jar
spring-security-core-3.1.0.RELEASE.jar
spring-security-kerberos-core-1.0.0.M2.jar
package codec from spring
core security 3.0.7 (https://jira.springsource.org/browse/SES-98)
tomcat
My Config file looks like the following. When I try to authentificate with the above libraries I got the following exception.
Had someone the same problem and handled it?
Config file (taken from spring security kerberos example):
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:sec="http://www.springframework.org/schema/security"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-3.1.xsd">
<!-- This configuration uses SPNEGO by default, but one could also use a form if he directly goes to /login.html -->
<sec:http entry-point-ref="spnegoEntryPoint" use-expressions="true">
<sec:intercept-url pattern="/secure/**" access="isAuthenticated()" />
<sec:custom-filter ref="spnegoAuthenticationProcessingFilter"
position="BASIC_AUTH_FILTER" />
<sec:form-login login-page="/login.html" default-target-url="/secure/index.jsp"/>
</sec:http>
<bean id="spnegoEntryPoint"
class="org.springframework.security.extensions.kerberos.web.SpnegoEntryPoint" />
<bean id="spnegoAuthenticationProcessingFilter"
class="org.springframework.security.extensions.kerberos.web.SpnegoAuthenticationProcessingFilter">
<property name="authenticationManager" ref="authenticationManager" />
</bean>
<sec:authentication-manager alias="authenticationManager">
<sec:authentication-provider ref="kerberosServiceAuthenticationProvider" /> <!-- Used with SPNEGO -->
<sec:authentication-provider user-service-ref="dummyUserDetailsService"/> <!-- Used with form login -->
</sec:authentication-manager>
<bean id="kerberosServiceAuthenticationProvider"
class="org.springframework.security.extensions.kerberos.KerberosServiceAuthenticationProvider">
<property name="ticketValidator">
<bean
class="org.springframework.security.extensions.kerberos.SunJaasKerberosTicketValidator">
<property name="servicePrincipal" value="HTTP/xxx.xx.xx.xx#XX-XXX.XXX.XX" />
<!-- Setting keyTabLocation to a classpath resource will most likely not work in a Java EE application Server -->
<!-- See the Javadoc for more information on that -->
<property name="keyTabLocation" value="file:/home/xxxxx/conf/krb5/krb5.keytab" />
<property name="debug" value="true" />
</bean>
</property>
<property name="userDetailsService" ref="dummyUserDetailsService" />
</bean>
<!-- This bean definition enables a very detailed Kerberos logging -->
<bean
class="org.springframework.security.extensions.kerberos.GlobalSunJaasKerberosConfig">
<property name="debug" value="true" />
</bean>
<!--
Just returns the User authenticated by Kerberos and gives him the
ROLE_USER
-->
<bean id="dummyUserDetailsService"
class="org.springframework.security.extensions.kerberos.sample.DummyUserDetailsService" />
</beans>
Exception which I got:
org.springframework.security.authentication.BadCredentialsException: Kerberos validation not succesfull
at org.springframework.security.extensions.kerberos.SunJaasKerberosTicketValidator.validateTicket(SunJaasKerberosTicketValidator.java:69)
at org.springframework.security.extensions.kerberos.KerberosServiceAuthenticationProvider.authenticate(KerberosServiceAuthenticationProvider.java:86)
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:156)
at org.springframework.security.extensions.kerberos.web.SpnegoAuthenticationProcessingFilter.doFilter(SpnegoAuthenticationProcessingFilter.java:131)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:323)
at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:173)
at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.ha.session.JvmRouteBinderValve.invoke(JvmRouteBinderValve.java:219)
at org.apache.catalina.ha.tcp.ReplicationValve.invoke(ReplicationValve.java:333)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.security.PrivilegedActionException: GSSException: Failure unspecified at GSS-API level (Mechanism level: Invalid argument (400) - Cannot find key of appropriate
type to decrypt AP REP - RC4 with HMAC)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.springframework.security.extensions.kerberos.SunJaasKerberosTicketValidator.validateTicket(SunJaasKerberosTicketValidator.java:67)
... 29 more
Caused by: GSSException: Failure unspecified at GSS-API level (Mechanism level: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - RC4 with HMAC)
at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:778)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285)
at sun.security.jgss.spnego.SpNegoContext.GSS_acceptSecContext(SpNegoContext.java:871)
at sun.security.jgss.spnego.SpNegoContext.acceptSecContext(SpNegoContext.java:544)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:342)
at sun.security.jgss.GSSContextImpl.acceptSecContext(GSSContextImpl.java:285)
at org.springframework.security.extensions.kerberos.SunJaasKerberosTicketValidator$KerberosValidateAction.run(SunJaasKerberosTicketValidator.java:146)
at org.springframework.security.extensions.kerberos.SunJaasKerberosTicketValidator$KerberosValidateAction.run(SunJaasKerberosTicketValidator.java:136)
... 32 more
Caused by: KrbException: Invalid argument (400) - Cannot find key of appropriate type to decrypt AP REP - RC4 with HMAC
at sun.security.krb5.KrbApReq.authenticate(KrbApReq.java:273)
at sun.security.krb5.KrbApReq.<init>(KrbApReq.java:144)
at sun.security.jgss.krb5.InitSecContextToken.<init>(InitSecContextToken.java:108)
at sun.security.jgss.krb5.Krb5Context.acceptSecContext(Krb5Context.java:761)
... 40 more

Answer 1

I found the problem.
Spring-security-kerbos requires path to keytab file as "Resource String" (details: http://static.springsource.org/spring/docs/3.0.x/reference/resources.html).
When I set path as "file:/home/xxxxx/conf/krb5/krb5.keytab" then application runs but I think that it can't open the file later and Kerberos cant load any key. Unfortunately Log from Kerberos is not so clear.
When I set path as "/home/xxxxx/conf/krb5/krb5.keytab" I got the following exception
Caused by: java.io.FileNotFoundException: ServletContext resource [/home/xxxxx/conf/krb5/krb5.keytab] cannot be resolved to URL because it does not exist
Solution for this issue can be the fix in the file SunJaasKerberosTicketValidator.java:
private String keyTabLocation;
LoginConfig loginConfig = new LoginConfig(keyTabLocation, servicePrincipal, debug);
instead of:
private Resource keyTabLocation;
LoginConfig loginConfig = new LoginConfig(keyTabLocation.getURL().toExternalForm(), servicePrincipal, debug);
With this fix everything works. We can set path to file in format "/home/xxxxx/conf/krb5/krb5.keytab"
If someone knows more details about it, please write it here.

Answer 2

At least Java 7 is not (or, my version is not) able to handle the "file:" prefix: See this link. I had to make the same modification to Spring sources as you did. Thanks, this was helpful. Wasted half a week on trying different configurations.