Custom UsernameToken

[Dylan McReynolds]

I have a partner who has implemented an STS in .NET. They require a 
custom-generated UsernameToken tag within the wsse:Security header. The 
tag has a unique namespace and its contents are unique.

If I add WSHandlerConstants.USERNAME_TOKEN to the 
WSHandlerConstants.ACTION property, it produces a wsse:UsernameToken. 
However, they want this custom tag to be a child of the wsse:Security tag:

       Map<String, Object> outProps = new HashMap<String, Object>();
       outProps.put(WSHandlerConstants.ACTION, 
WSHandlerConstants.SAML_TOKEN_UNSIGNED + " " + 
WSHandlerConstants.USERNAME_TOKEN);

       outProps.put(WSHandlerConstants.SAML_PROP_FILE, "saml.properties");
       outProps.put(WSHandlerConstants.USER, "foo_username");
       outProps.put(WSHandlerConstants.PASSWORD_TYPE, WSConstants.PW_TEXT);
       outProps.put(WSHandlerConstants.MUST_UNDERSTAND, "true");
       outProps.put(WSHandlerConstants.PW_CALLBACK_REF, new 
PasswordHandler("bar_password"));
       WSS4JOutInterceptor wssOut = new WSS4JOutInterceptor(outProps); 
//request
       bus.getOutInterceptors().add(wssOut);


I've tried extending WSS4JOutInterceptor, building my token in the 
handleMessage method and adding it to the headers using:
   Header header = new Header(qname, elem);
  msg.getHeaders().add(header);

But this ends up as its own header.

Is there someway that I can add to the wsse:Security tag, or modify the 
wsse:UsernameToken tag?

Thanks,
Dylan McReynolds