[SWS-841] NullPointerException on First invocation to Spring WS Service with Nonce Created: 23/Jul/13  Updated: 20/Aug/13  Resolved: 20/Aug/13

Status: Resolved
Project: Spring Web Services
Component/s: Security
Affects Version/s: 2.0.4
Fix Version/s: 2.1.4

Type: Support Priority: Major
Reporter: Jorge Perez Assignee: Arjen Poutsma
Resolution: Won't Fix Votes: 1
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

JBoss 5.1 GA on GNU/Linux server
Tested also with same AS in a Windows 7 laptop

Attachments: XML File wsatrmen001-servlet.xml    


I have a web service implemented with Spring WS stack over a JBoss 5.1 GA.

The service has configured as one of the interceptors the security interceptor:

<bean id="wsSecurityInterceptor" class="org.springframework.ws.soap.security.xwss.XwsSecurityInterceptor">
  <property name="policyConfiguration" value="/WEB-INF/securityPolicy.xml" />
  <property name="callbackHandlers">
      <ref bean="ldapAuthenticationHandler" />

The content of securityPolicy.xml file is the following one:

<xwss:RequireUsernameToken passwordDigestRequired="false" nonceRequired="true" />

The problem is that since I set the nonceRequired attribute to true, always the first invocation sent to the service returns a NullPointerException:

   <faultstring xml:lang="en">java.lang.NullPointerException; nested exception is com.sun.xml.wss.XWSSecurityException: java.lang.NullPointerException</faultstring>

On following invocations exception is never found again.
It seems related to the nonce cache, as it in first invocation the cache is not created yet and instead of validating any input nonce, it returns this exception.

Is there any way to avoid this problem? The environment on which the app is installed restarts everyday so always users get this error once a day.

I attach the full appContext file of the web service in case it helps.

Thanks a lot and regards.

Comment by Steven Bauer [ 24/Jul/13 ]

I am seeing the same issue.
Also JBOSS 5.1.
spring-ws-core version 2.1.3.RELEASE

Comment by Arjen Poutsma [ 20/Aug/13 ]

Added code tags.

Comment by Arjen Poutsma [ 20/Aug/13 ]

Could you give me the full stack trace of the server side? I'd like to know where the NPE occurs.

Comment by Arjen Poutsma [ 20/Aug/13 ]

After some more verification, it seems that the NPE occurs when a message does contain a Nonce element, but does not contain a Created element. XWSS does not like this, and throws a NullPointerException with the following stacktrace:

Caused by: com.sun.xml.wss.XWSSecurityException: java.lang.NullPointerException
	at com.sun.xml.wss.impl.misc.XWSSProcessor2_0Impl.verifyInboundMessage(XWSSProcessor2_0Impl.java:150)
	at org.springframework.ws.soap.security.xwss.XwsSecurityInterceptor.validateMessage(XwsSecurityInterceptor.java:164)
	... 28 more
Caused by: java.lang.NullPointerException
	at java.util.Hashtable.put(Hashtable.java:394)
	at com.sun.xml.wss.impl.misc.NonceCache.validateAndCacheNonce(NonceCache.java:93)
	at com.sun.xml.wss.impl.misc.DefaultNonceManager.validateNonce(DefaultNonceManager.java:74)
	at com.sun.xml.wss.impl.misc.DefaultSecurityEnvironmentImpl.validateAndCacheNonce(DefaultSecurityEnvironmentImpl.java:1506)
	at com.sun.xml.wss.impl.filter.AuthenticationTokenFilter.getUserNameTokenFromMessage(AuthenticationTokenFilter.java:308)
	at com.sun.xml.wss.impl.filter.AuthenticationTokenFilter.processUserNameToken(AuthenticationTokenFilter.java:106)
	at com.sun.xml.wss.impl.HarnessUtil.processWSSPolicy(HarnessUtil.java:105)
	at com.sun.xml.wss.impl.HarnessUtil.processDeep(HarnessUtil.java:268)
	at com.sun.xml.wss.impl.SecurityRecipient.processMessagePolicy(SecurityRecipient.java:1027)
	at com.sun.xml.wss.impl.SecurityRecipient.processMessagePolicy(SecurityRecipient.java:815)
	at com.sun.xml.wss.impl.SecurityRecipient.validateMessage(SecurityRecipient.java:256)
	at com.sun.xml.wss.impl.misc.XWSSProcessor2_0Impl.verifyInboundMessage(XWSSProcessor2_0Impl.java:148)
	... 29 more

The stacktrace originates from the fact that com.sun.xml.wss.impl.misc.NonceCache.validateAndCacheNonce wants to insert a null value for the created date into a Hashtable, which does not allow null values.

I tried to create a workaround for this, by repeating the XWSS method call twice (as suggested in the description), but this seems to have no effect.

Closing as Won't Fix, because it appears to be a XWSS issue with no possible workaround. If more investigation is requested, please supply a reproducible test case in the same format as org.springframework.ws.soap.security.xwss.XwssMessageInterceptorUsernameTokenTest.

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