Can't Verify a SOAP message

Question

I have a problem in verifying a SOAP message that I have created my self, after signing the message and then convert it to string, I try to verify it, but it returns false each time, but when I use the Document after siging it without converting it to a string , it works, I really need some one to tell me why is it doing this here is the code for both cases
- Converting Document to String before verifying sugnature
signature.sign(dsc);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer trans = tf.newTransformer();
StringWriter signedXMl = new StringWriter();
trans.transform(new DOMSource(docElement), new StreamResult(signedXMl));
String tempstr = signedXMl.toString();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
NodeList nl = null;
DocumentBuilder builder = dbf.newDocumentBuilder();
Document doc = builder.parse(new InputSource(new StringReader(inXML)));
nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
if (nl.getLength() == 0)
                    System.out.println("In main: ERROR - Cannot find Signature element");
validateElement(nl.item(0),kp);---------------------------------------------------------------------------------------------
- Using the same Document element used in Signing for verification
signature.sign(dsc);
NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS, "Signature");
validateElement(nl.item(0),kp);----------------------------------------------
both use validateElement function
private static void validateElement(Node signElement,KeyPair kp) {
                 DOMValidateContext valContext = new DOMValidateContext(kp.getPublic(), signElement);
          String providerName = System.getProperty("jsr105Provider","org.jcp.xml.dsig.internal.dom.XMLDSigRI");
          XMLSignatureFactory factory = null;
          XMLSignature signature = null;
          try
               factory = XMLSignatureFactory.getInstance("DOM",(Provider) Class.forName(providerName).newInstance());
               signature = factory.unmarshalXMLSignature(valContext);
               boolean coreValidity = signature.validate(valContext);
               String kiki  = null;
               boolean sv = signature.getSignatureValue().validate(valContext);
               //System.out.println("signature validation status: " sv);
               Iterator i = signature.getSignedInfo().getReferences().iterator();
               for (int j=0; i.hasNext(); j++)
                    boolean refValid = ((Reference) i.next()).validate(valContext);
                    String koko = null;
          } catch (Exception e)
               String koko = null;
I really apreciate any input, I don't know what to do

Answer 1

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