RE: Non dom based signature?

[Vincent Finn]

> From: Berin Lautenbach
> Not so much a function.  If you create a Reference with a URI that 
> points to the file you want to use, that should do the trick.

trying this and failing
I'm sure I am missing something obvious but I can't see any examples using URI and 
mine isn't working

I created a reference with a URI that points to the file and called sign and the sign 
function throws
"XPath requires DOM_NODES input type"

The function I use is below
Any idea what I am missing?

I have tried having the URI with and without the root node <DALML/> part with no 
difference
I have tried setting or not setting a URI resolver
and I have tried the generic and xerces resolvers
nothing helps

        Vin

the string sDocument is "<Start></Start>"

// begin code
void XMLSignature::SignDocument(std::string const& sDocument, std::string& sOutput)
{
  XMLPlatformUtils::Initialize();
  XSECPlatformUtils::Initialise();

  // parse the document
  XercesDOMParser domParser;
  domParser.setDoNamespaces(true);
  MemBufInputSource memIS((const XMLByte*) sDocument.c_str(), sDocument.size(), 
"XSECMem");
  domParser.parse(memIS);
  DOMDocument* doc = domParser.getDocument();
  DOMElement *rootElem = doc->getDocumentElement();

  // Create a signature object
  XSECProvider prov;
  DSIGSignature * sig = prov.newSignature();
  sig->setDSIGNSPrefix(MAKE_UNICODE_STRING("ds"));

  // Insert the signature DOM nodes into the doc
  DOMElement *sigNode;
  sigNode = sig->createBlankSignature(doc, CANON_C14N_COM, SIGNATURE_HMAC, HASH_SHA1);
  rootElem->appendChild(sigNode);

//////////////////////////////
// Here are my attempts at the URI

  XMLUri uri(MAKE_UNICODE_STRING("file:///C:/dbs/haha.xml#DALML"));
  //XSECURIResolverGenericWin32 theResolver;
  XSECURIResolverXerces theResolver;
  theResolver.setBaseURI(uri.getUriText());
  sig->setURIResolver(&theResolver);
  DSIGReference * ref = 
sig->createReference(MAKE_UNICODE_STRING("file:///C:/dbs/haha.xml#DALML"));
  // Create an envelope reference for the text to be signed
  ref->appendEnvelopedSignatureTransform();

// End attempts
//////////////////////////////

        // Set the HMAC Key to be our key, the signature will own this so we don't 
want an auto_ptr
        OpenSSLCryptoKeyHMAC* hmacKey = new OpenSSLCryptoKeyHMAC();
        hmacKey->setKey((unsigned char *) g_acKey, strlen(g_acKey));
        sig->setSigningKey(hmacKey);

        // Sign the document
        try{
        sig->sign();
        }
        catch (XSECException &e)
        {
                std::wstring ws(e.getMsg());
                std::cout << "An error occured during a signature load\n   Message: "
                << std::endl;
                exit(1);
        }

        prov.releaseSignature(sig);

        // write the file
        DOMImplementation *impl = doc->getImplementation();
        std::auto_ptr<DOMWriter> theSerializer(impl->createDOMWriter());
        USES_CONVERSION;
        sOutput  = W2A(theSerializer->writeToString(*doc));
        
        XSECPlatformUtils::Terminate();
        XMLPlatformUtils::Terminate();
}