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From Paul Jamason <pjama...@gpsmail.ucsd.edu>
Subject NPE with WSSecurityEngineResult
Date Sat, 05 Nov 2005 03:57:14 GMT
Hi,

I'm attempting to read the username from the soap header ws-security 
block in my web service, using the following code 
(modified from the snippet shown at 
http://ws.apache.org/wss4j/apidocs/org/apache/ws/axis/security/package-summary.html):

String user = null;
         try {
 	    MessageContext context = 
MessageContext.getCurrentContext();
             Vector recvResults = (Vector) 
context.getProperty(WSHandlerConstants.RECV_RESULTS);
 	    WSHandlerResult result = (WSHandlerResult) 
recvResults.get(0);
 	    Vector results = result.getResults();
 	    WSSecurityEngineResult wsseResult = 
(WSSecurityEngineResult) results.get(0);
 	    String DN = wsseResult.getPrincipal().getName();
 	    user = DN.substring(13, DN.indexOf(','));
         } catch (Exception e) {
             e.printStackTrace(System.err);
 	}


However, I get an NPE here:

     String DN = wsseResult.getPrincipal().getName();


Here's the stack trace:

java.lang.NullPointerException
         at 
edu.ucsd.sopac.reason.asa.ws.ASA_Receive.authRequest(ASA_Receive.java:65)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:85)
         at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:58)
         at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java(Compiled

Code))
         at java.lang.reflect.Method.invoke(Method.java(Compiled 
Code))
         at 
org.apache.axis.providers.java.RPCProvider.invokeMethod(RPCProvider.java:388)
         at 
org.apache.axis.providers.java.RPCProvider.processMessage(RPCProvider.java:283)
         at 
org.apache.axis.providers.java.JavaProvider.invoke(JavaProvider.java:323)
         at 
org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
         at 
org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
         at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
         at 
org.apache.axis.handlers.soap.SOAPService.invoke(SOAPService.java:453)
         at 
org.apache.axis.server.AxisServer.invoke(AxisServer.java:281)
         at 
org.apache.axis.transport.http.AxisServlet.doPost(AxisServlet.java:699)
         at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
         at 
org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
         at 
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
         at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
         at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
         at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
         at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
         at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
         at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
         at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
         at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
         at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
         at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
         at 
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
         at 
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
         at 
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
         at java.lang.Thread.run(Thread.java:568)


I am able to get debug output for WSSecurityEngine (handler output):

- enter processSecurityHeader()
- Processing WS-Security header for '' actor.
- Found UsernameToken list element
- UsernameToken user test
- UsernameToken password CcgmjRKPSS/vVrETPlpGWgwsSQg=
- UsernameToken callback password <removed>
- Found Timestamp list element
- Preparing to verify the timestamp
- Current time: 2005-11-05T03:06:47Z
- Timestamp created: 2005-11-05T03:06:47Z
- Timestamp expires: 2005-11-05T03:11:47Z
- Validation of Timestamp: Everything is ok

but not for WSS4JHandler, for the code snippet above.  Both are set 
to DEBUG in log4j.properties.

If I use the code snippet at the url above, the NPE occurs at:

WSSecurityEngineResult eResult = (WSSecurityEngineResult) hResults.get(j);

Finally, I am seeing the "java.lang.NoSuchFieldException: 
m_functions" error in the log, which still persists despite 
creating the $JAVA_HOME/jre/lib/endorsed directory and placing 
xalan-2.6.0.jar there.

Thanks in advance for any help.

Paul



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