FULL PRODUCT VERSION :
java version  " 1.7.0_25 " 
Java(TM) SE Runtime Environment (build 1.7.0_25-b15)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.35-2 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
When using a ID to reference the part, which should be signed in the XML document - on validating the reference cannot be resolved.

Stacktrace:
$ ~/programs/jdk1.7.0_25/bin/java -cp bin XmlSigningTest
Exception in thread  " main "  javax.xml.crypto.dsig.XMLSignatureException: javax.xml.crypto.URIReferenceException: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(DOMReference.java:412)
...

REGRESSION.  Last worked in version 7

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
* Create a keystore with password  " changeit " : keytool -genkeypair -keyalg RSA -alias mykey -keystore mykeystore.jks
* Create the source xml file with the following content:
<?xml version= " 1.0 "  encoding= " UTF-8 " ?>
<PurchaseOrder ID= " _123 " >
 <Item number= " 130046593231 " >
  <Description>Video Game</Description>
  <Price>10.29</Price>
 </Item>
 <Buyer id= " 8492340 " >
  <Name>My Name</Name>
  <Address>
   <Street>One Network Drive</Street>
   <Town>Burlington</Town>
   <State>MA</State>
   <Country>United States</Country>
   <PostalCode>01803</PostalCode>
  </Address>
 </Buyer>
</PurchaseOrder>

* Execute the test case, see source code section.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
No exception, but  " Validation Result: true " 
ACTUAL -
Stacktrace:
$ ~/programs/jdk1.7.0_25/bin/java -cp bin XmlSigningTest
Exception in thread  " main "  javax.xml.crypto.dsig.XMLSignatureException: javax.xml.crypto.URIReferenceException: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(DOMReference.java:412)
at org.jcp.xml.dsig.internal.dom.DOMReference.digest(DOMReference.java:338)
at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.digestReference(DOMXMLSignature.java:471)
at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.sign(DOMXMLSignature.java:367)
at XmlSigningTest.main(XmlSigningTest.java:111)
Caused by: javax.xml.crypto.URIReferenceException: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(DOMURIDereferencer.java:124)
at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(DOMReference.java:404)
... 4 more
Caused by: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at com.sun.org.apache.xml.internal.security.utils.resolver.implementations.ResolverFragment.engineResolve(ResolverFragment.java:90)
at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.resolve(ResourceResolver.java:283)
at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(DOMURIDereferencer.java:117)
... 5 more
javax.xml.crypto.URIReferenceException: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(DOMURIDereferencer.java:124)
at org.jcp.xml.dsig.internal.dom.DOMReference.dereference(DOMReference.java:404)
at org.jcp.xml.dsig.internal.dom.DOMReference.digest(DOMReference.java:338)
at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.digestReference(DOMXMLSignature.java:471)
at org.jcp.xml.dsig.internal.dom.DOMXMLSignature.sign(DOMXMLSignature.java:367)
at XmlSigningTest.main(XmlSigningTest.java:111)
Caused by: com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolverException: Cannot resolve element with ID _123
at com.sun.org.apache.xml.internal.security.utils.resolver.implementations.ResolverFragment.engineResolve(ResolverFragment.java:90)
at com.sun.org.apache.xml.internal.security.utils.resolver.ResourceResolver.resolve(ResourceResolver.java:283)
at org.jcp.xml.dsig.internal.dom.DOMURIDereferencer.dereference(DOMURIDereferencer.java:117)
... 5 more


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.security.Key;
import java.security.KeyStore;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import javax.xml.crypto.AlgorithmMethod;
import javax.xml.crypto.KeySelector;
import javax.xml.crypto.KeySelectorException;
import javax.xml.crypto.KeySelectorResult;
import javax.xml.crypto.XMLCryptoContext;
import javax.xml.crypto.XMLStructure;
import javax.xml.crypto.dsig.CanonicalizationMethod;
import javax.xml.crypto.dsig.DigestMethod;
import javax.xml.crypto.dsig.Reference;
import javax.xml.crypto.dsig.SignatureMethod;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.Transform;
import javax.xml.crypto.dsig.XMLSignature;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.dom.DOMValidateContext;
import javax.xml.crypto.dsig.keyinfo.KeyInfo;
import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
import javax.xml.crypto.dsig.keyinfo.X509Data;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.TransformParameterSpec;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Document;
import org.w3c.dom.NodeList;

/**
 *
 * keytool -genkeypair -keyalg RSA -alias mykey -keystore mykeystore.jks
 *
 *
 * @see http://www.oracle.com/technetwork/articles/javase/dig-signature-api-140772.html
 */
public class XmlSigningTest {

    private static final String ID =  " #_123 " ;

    public static void main(String[] args) throws Exception {
        // Create a DOM XMLSignatureFactory that will be used to
        // generate the enveloped signature.
        XMLSignatureFactory fac = XMLSignatureFactory.getInstance( " DOM " );

        Reference ref = fac
            .newReference(ID, fac.newDigestMethod(DigestMethod.SHA1, null),
                Collections.singletonList(fac.newTransform(Transform.ENVELOPED, (TransformParameterSpec) null)), null,
                null);

        // Create the SignedInfo.
        SignedInfo si = fac.newSignedInfo(
            fac.newCanonicalizationMethod(CanonicalizationMethod.INCLUSIVE, (C14NMethodParameterSpec) null),
            fac.newSignatureMethod(SignatureMethod.RSA_SHA1, null), Collections.singletonList(ref));

        // Load the KeyStore and get the signing key and certificate.
        KeyStore ks = KeyStore.getInstance( " JKS " );
        ks.load(new FileInputStream( " mykeystore.jks " ),  " changeit " .toCharArray());
        KeyStore.PrivateKeyEntry keyEntry = (KeyStore.PrivateKeyEntry) ks.getEntry( " mykey " ,
            new KeyStore.PasswordProtection( " changeit " .toCharArray()));
        X509Certificate cert = (X509Certificate) keyEntry.getCertificate();

        // Create the KeyInfo containing the X509Data.
        KeyInfoFactory kif = fac.getKeyInfoFactory();
        List x509Content = new ArrayList();
        x509Content.add(cert.getSubjectX500Principal().getName());
        x509Content.add(cert);
        X509Data xd = kif.newX509Data(x509Content);
        KeyInfo ki = kif.newKeyInfo(Collections.singletonList(xd));

        // Instantiate the document to be signed.
        DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
        dbf.setNamespaceAware(true);
        Document doc = dbf.newDocumentBuilder().parse(new FileInputStream( " purchaseOrder.xml " ));

        // Create a DOMSignContext and specify the RSA PrivateKey and
        // location of the resulting XMLSignature's parent element.
        DOMSignContext dsc = new DOMSignContext(keyEntry.getPrivateKey(), doc.getDocumentElement());

        // Create the XMLSignature, but don't sign it yet.
        XMLSignature signature = fac.newXMLSignature(si, ki);

        // Marshal, generate, and sign the enveloped signature.
        signature.sign(dsc);

        // Output the resulting document.
        OutputStream os = new FileOutputStream( " signedPurchaseOrder.xml " );
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer trans = tf.newTransformer();
        trans.transform(new DOMSource(doc), new StreamResult(os));

        // Find Signature element.
        NodeList nl = doc.getElementsByTagNameNS(XMLSignature.XMLNS,  " Signature " );
        if (nl.getLength() == 0) {
            throw new Exception( " Cannot find Signature element " );
        }

        // Create a DOMValidateContext and specify a KeySelector
        // and document context.
        DOMValidateContext valContext = new DOMValidateContext(new X509KeySelector(), nl.item(0));

        // Unmarshal the XMLSignature.
        XMLSignature signature2 = fac.unmarshalXMLSignature(valContext);

        // Validate the XMLSignature.
        boolean coreValidity = signature2.validate(valContext);
        
        System.out.println( " Validation Result:  "  + coreValidity);
    }

    public static class X509KeySelector extends KeySelector {
        @Override
        public KeySelectorResult select(KeyInfo keyInfo, KeySelector.Purpose purpose, AlgorithmMethod method,
            XMLCryptoContext context) throws KeySelectorException {
            Iterator ki = keyInfo.getContent().iterator();
            while (ki.hasNext()) {
                XMLStructure info = (XMLStructure) ki.next();
                if (!(info instanceof X509Data)) {
                    continue;
                }
                X509Data x509Data = (X509Data) info;
                Iterator xi = x509Data.getContent().iterator();
                while (xi.hasNext()) {
                    Object o = xi.next();
                    if (!(o instanceof X509Certificate)) {
                        continue;
                    }
                    final PublicKey key = ((X509Certificate) o).getPublicKey();
                    // Make sure the algorithm is compatible
                    // with the method.
                    if (algEquals(method.getAlgorithm(), key.getAlgorithm())) {
                        return new KeySelectorResult() {
                            @Override
                            public Key getKey() {
                                return key;
                            }
                        };
                    }
                }
            }
            throw new KeySelectorException( " No key found! " );
        }

        static boolean algEquals(String algURI, String algName) {
            if ((algName.equalsIgnoreCase( " DSA " ) && algURI.equalsIgnoreCase(SignatureMethod.DSA_SHA1))
                || (algName.equalsIgnoreCase( " RSA " ) && algURI.equalsIgnoreCase(SignatureMethod.RSA_SHA1))) {
                return true;
            } else {
                return false;
            }
        }
    }
}

---------- END SOURCE ----------