Adding a security token

[Sabareeswar P. B.]

Hi,
 I am new to frameworks like WS-policy and WS-Security.

I am using synapse as a SOAP intermediary and I want to introduce a username 
token in the soap message which comes out of synapse.
The token must look like

            
xmlns:oas="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd";
      <oas:Security>
         <oas:UsernameToken>
            <oas:Username>admin</oas:Username>
            <oas:Password>admin123</oas:Password>
         </oas:UsernameToken>
      </oas:Security>

Could you please tell me how I must proceed with synapse?

Regards,
Sabareeswar
+91 80 668 82267