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From Ian Hummel <>
Subject Problems writing signed document to disk
Date Thu, 03 Apr 2008 20:27:50 GMT
Hi everyone,

Something weird is going on when I try to write my signed Document to  

					//doc is a Document which has gone through the signing process...
		Transformer xformer =  
		DOMSource source = new DOMSource(doc);
		StreamResult result = new StreamResult(new File("output.xml"));
		xformer.transform(source, result);

		DocumentBuilderFactory dbf2 = DocumentBuilderFactory.newInstance();
		DocumentBuilder db2 = dbf2.newDocumentBuilder();
		Document doc2 = db2.parse(new File("output.xml"));
		boolean res1 = CryptoUtils.verifyXmlSignature(doc);
		boolean res2 = CryptoUtils.verifyXmlSignature(doc2);
		System.out.println("RES 1 (raw) was " + res1);
		System.out.println("RES 2 (read) was " + res2);

This code prints out:

INFO - Verification  
successful for URI "#IC01"
WARN - Verification  
failed for URI "#IC01"
WARN  CryptoUtils - Signature was invalid
RES 1 (raw) was true
RES 2 (read) was false

any idea why writing the DOM to disk would make subsequent reads to  
validate it fail?

The only things I can think of are a) the Transformer is altering the  
document before writing it to disk or b) there are a lot of elements  
whose content is base64 encoded and making somehow they are getting  
mangled when written to disk?

Any help is appreciated!

- ian.
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