SOAP KeyInfo Values

Question

I am trying to configure my signature for a SOAP message. The only part I left is to populate KeyInfo as such:

> <KeyInfo>
>       <wsse:SecurityTokenReference>
>           <wsse:KeyIdentifier ValueType="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-x509-token-profile-1.0#X509SubjectKeyIdentifier">XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX</wsse:KeyIdentifier>
>       </wsse:SecurityTokenReference>
>     </KeyInfo>

I tried several methods, but I could not achieve this with KeyInfo and KeyInfoFactory.

If this is the wrong way to do this, how can I make sure KeyInfo is populated as part of my signature?

XMLSignature signature = sigFactory.newXMLSignature(signedinfo,keyinfo)

I can add information to the X509, but I see no way to add a SecurityTokenReference