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List:       xml-security-dev
Subject:    DO NOT REPLY [Bug 40783]  New:  - NPE in ResolverDirectHTTP.engineCanResolve
From:       bugzilla () apache ! org
Date:       2006-10-18 8:46:11
Message-ID: bug-40783-6260 () http ! issues ! apache ! org/bugzilla/
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http://issues.apache.org/bugzilla/show_bug.cgi?id=40783

           Summary: NPE in ResolverDirectHTTP.engineCanResolve
           Product: Security
           Version: unspecified
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Signature
        AssignedTo: security-dev@xml.apache.org
        ReportedBy: info@frankcornelis.be


When executing the following code using XML Security 1.4.Beta2 you'll get an
NPE. I think a better error reporting would be something like: cannot resolve URI.

XMLSignature signature = new XMLSignature(testDocument, null,
				XMLSignature.ALGO_ID_SIGNATURE_RSA_SHA512,
				Canonicalizer.ALGO_ID_C14N_WITH_COMMENTS);

Element signatureElement = signature.getElement();
Element rootElement = (Element) testDocument.getFirstChild();
rootElement.appendChild(signatureElement);

Transforms transforms = new Transforms(testDocument);
signature.addDocument("urn:unknown:uri", transforms,
    MessageDigestAlgorithm.ALGO_ID_DIGEST_SHA512);

signature.addKeyInfo(publicKey);

signature.sign(privateKey);



The NPE stack trace:

java.lang.NullPointerException
	at
org.apache.xml.security.utils.resolver.implementations.ResolverDirectHTTP.engineCanResolve(Unknown
Source)
	at org.apache.xml.security.utils.resolver.ResourceResolver.canResolve(Unknown
Source)
	at org.apache.xml.security.utils.resolver.ResourceResolver.getInstance(Unknown
Source)
	at org.apache.xml.security.utils.resolver.ResourceResolver.getInstance(Unknown
Source)
	at
org.apache.xml.security.signature.Reference.getContentsBeforeTransformation(Unknown
Source)
	at
org.apache.xml.security.signature.Reference.dereferenceURIandPerformTransforms(Unknown
Source)
	at org.apache.xml.security.signature.Reference.calculateDigest(Unknown Source)
	at org.apache.xml.security.signature.Reference.generateDigestValue(Unknown Source)
	at org.apache.xml.security.signature.Manifest.generateDigestValues(Unknown Source)
	at org.apache.xml.security.signature.XMLSignature.sign(Unknown Source)

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