public void digest(XMLSignContext signContext) throws XMLSignatureException {
Data data = null;
if (appliedTransformData == null) {
data = dereference(signContext);
} else {
data = appliedTransformData;
}
digestValue = transform(data, signContext);
// insert digestValue into DigestValue element
String encodedDV = Base64.encode(digestValue);
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Reference object uri = " + uri);
}
Element digestElem = DOMUtils.getLastChildElement(refElem);
if (digestElem == null) {
throw new XMLSignatureException("DigestValue element expected");
}
DOMUtils.removeAllChildren(digestElem);
digestElem.appendChild(refElem.getOwnerDocument().createTextNode(encodedDV));
digested = true;
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Reference digesting completed");
}
}
/**
* Creates a <code>DOMReference</code> from an element.
*
* @param refElem a Reference element
*/
public DOMReference(Element refElem, XMLCryptoContext context) throws MarshalException {
// unmarshal Transforms, if specified
Element nextSibling = DOMUtils.getFirstChildElement(refElem);
List transforms = new ArrayList(5);
if (nextSibling.getLocalName().equals("Transforms")) {
Element transformElem = DOMUtils.getFirstChildElement(nextSibling);
while (transformElem != null) {
transforms.add(new DOMTransform(transformElem, context));
transformElem = DOMUtils.getNextSiblingElement(transformElem);
}
nextSibling = DOMUtils.getNextSiblingElement(nextSibling);
}
// unmarshal DigestMethod
Element dmElem = nextSibling;
this.digestMethod = DOMDigestMethod.unmarshal(dmElem);
// unmarshal DigestValue
try {
Element dvElem = DOMUtils.getNextSiblingElement(dmElem);
this.digestValue = Base64.decode(dvElem);
} catch (Base64DecodingException bde) {
throw new MarshalException(bde);
}
// unmarshal attributes
this.uri = DOMUtils.getAttributeValue(refElem, "URI");
this.id = DOMUtils.getAttributeValue(refElem, "Id");
this.type = DOMUtils.getAttributeValue(refElem, "Type");
this.here = refElem.getAttributeNodeNS(null, "URI");
this.refElem = refElem;
if (transforms.isEmpty()) {
this.transforms = Collections.EMPTY_LIST;
} else {
this.transforms = Collections.unmodifiableList(transforms);
}
this.appliedTransforms = Collections.EMPTY_LIST;
this.allTransforms = transforms;
this.appliedTransformData = null;
}
public void marshal(Node parent, String dsPrefix, DOMCryptoContext context)
throws MarshalException {
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Marshalling Reference");
}
Document ownerDoc = DOMUtils.getOwnerDocument(parent);
refElem = DOMUtils.createElement(ownerDoc, "Reference", XMLSignature.XMLNS, dsPrefix);
// set attributes
DOMUtils.setAttributeID(refElem, "Id", id);
DOMUtils.setAttribute(refElem, "URI", uri);
DOMUtils.setAttribute(refElem, "Type", type);
// create and append Transforms element
if (!transforms.isEmpty() || !appliedTransforms.isEmpty()) {
Element transformsElem =
DOMUtils.createElement(ownerDoc, "Transforms", XMLSignature.XMLNS, dsPrefix);
refElem.appendChild(transformsElem);
for (int i = 0, size = appliedTransforms.size(); i < size; i++) {
DOMStructure transform = (DOMStructure) appliedTransforms.get(i);
transform.marshal(transformsElem, dsPrefix, context);
}
for (int i = 0, size = transforms.size(); i < size; i++) {
DOMStructure transform = (DOMStructure) transforms.get(i);
transform.marshal(transformsElem, dsPrefix, context);
}
}
// create and append DigestMethod element
((DOMDigestMethod) digestMethod).marshal(refElem, dsPrefix, context);
// create and append DigestValue element
if (log.isLoggable(Level.FINE)) {
log.log(Level.FINE, "Adding digestValueElem");
}
Element digestValueElem =
DOMUtils.createElement(ownerDoc, "DigestValue", XMLSignature.XMLNS, dsPrefix);
if (digestValue != null) {
digestValueElem.appendChild(ownerDoc.createTextNode(Base64.encode(digestValue)));
}
refElem.appendChild(digestValueElem);
parent.appendChild(refElem);
here = refElem.getAttributeNodeNS(null, "URI");
}