[xmlsec] Signing works in command line tool but not in code? [SEC=UNCLASSIFIED]

[Cartland, Bruce]

I am using the command line tool to successfully sign a template file. A
dotnet soap service successfully processes the sign.xml file. 

	xmlsec --sign --print-debug --privkey-der pk.der --output
sign.xml vstsout.xml

I am now trying the same thing in code with exactly the same files but
the signature fails. I based this on the sample "sign1.c". However I
notice the command line source uses a quite different approach (e.g. a
keymanager instance). Before I delve into that, is there anything
obviously missing here?

	doc = xmlParseFile("vstsout.xml");
	node = xmlSecFindNode(xmlDocGetRootElement(doc),
xmlSecNodeSignature, xmlSecDSigNs);
      dsigCtx = xmlSecDSigCtxCreate(NULL);
      dsigCtx->signKey = xmlSecCryptoAppKeyLoad("pk.der",
xmlSecKeyDataFormatDer, NULL, NULL, NULL);
      xmlSecKeySetName(dsigCtx->signKey, BAD_CAST "pk-der");

      xmlSecDSigCtxSign(dsigCtx, node);   <<<<<<-------- the signature
fails

Thanks muchly
Bruce 

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