WSSubject returning null - Urgent!

Hi All,

I have this code which needs to be migrated from a different Webservice codebase to mine. I did it and when i hit my webservice now, I have a callbackhandler (which i migrated from the other WS) which has the following code, which always returns WSSubject.getCallerSubject() as null. I am totally new to the callbackhandler concept.

public WebAuthClientCallbackHandler(String username, char[] password,
      java.util.Map properties) throws IOException, SRSSystemFault
  {
    super();
   
    String clientID = null;

try {
		
		Subject subj = com.ibm.websphere.security.auth.WSSubject.getCallerSubject();
		
		Iterator it = subj.getPrivateCredentials().iterator();

while (it.hasNext()) {
			Object obj = it.next();
			if (obj != null
					&& obj instanceof com.ibm.wsspi.wssecurity.auth.token.UsernameToken) {
				
				com.ibm.wsspi.wssecurity.auth.token.UsernameToken unt = (com.ibm.wsspi.wssecurity.auth.token.UsernameToken) obj;
				clientID = unt.getPrincipal();			
			}
		}
	} catch (Exception e) {
		e.printStackTrace();
		
		throw new SRSSystemFault(-1, e.getMessage());
	}	
   	
	String valForClientID = GenericProperty.getPropertyValue(clientID);
	StringTokenizer st = new StringTokenizer(valForClientID);
	username = st.nextToken();
	String encryptedPassword = st.nextToken();
	
	
	if(StringUtility.isExist(username) || StringUtility.isExist(encryptedPassword)){	
		try {
			DecryptUserCredential decryptUserCredential = new DecryptUserCredential();
			password = decryptUserCredential.getDecryptedString(encryptedPassword).toCharArray();			
		}catch (Exception e) {
			
		}
	}else{
		throw new IOException("Could not read Username and Password from properties file"); 
	}
	
	
	this._wasUsername = username;
	this._wasPassword = password;
	this._properties = properties;
  }

The second line in the try block is the culprit. It throws nullpointerexception since Subject is null. Please help me out.

[VK: Added code tags]

Hi, having same problem. Did you manage to fix this?

Thanks.