Element bstElem = encrKey.getBinarySecurityTokenElement();
if (bstElem != null) {
addTopDownElement(bstElem);
}
encrKey.appendToHeader(secHeader);
WSSecDKSign dkSig = new WSSecDKSign(wssConfig);
dkSig.setSigCanonicalization(binding.getAlgorithmSuite().getInclusiveC14n());
dkSig.setSignatureAlgorithm(binding.getAlgorithmSuite().getSymmetricSignature());