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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.xml.security.signature;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.xml.parsers.ParserConfigurationException;
import org.apache.xml.security.c14n.CanonicalizationException;
import org.apache.xml.security.c14n.InvalidCanonicalizerException;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.transforms.Transforms;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.I18n;
import org.apache.xml.security.utils.SignatureElementProxy;
import org.apache.xml.security.utils.XMLUtils;
import org.apache.xml.security.utils.resolver.ResourceResolver;
import org.apache.xml.security.utils.resolver.ResourceResolverSpi;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;
/**
* Handles <ds:Manifest> elements.
* This element holds the Reference elements
*/
public class Manifest extends SignatureElementProxy {
/**
* The maximum number of references per Manifest, if secure validation is enabled.
*/
public static final int MAXIMUM_REFERENCE_COUNT = 30;
/** {@link org.apache.commons.logging} logging facility */
private static org.apache.commons.logging.Log log =
org.apache.commons.logging.LogFactory.getLog(Manifest.class);
/** Field references */
private List references;
private Element[] referencesEl;
/** Field verificationResults[] */
private boolean verificationResults[] = null;
/** Field resolverProperties */
private Map resolverProperties = null;
/** Field perManifestResolvers */
private List perManifestResolvers = null;
private boolean secureValidation;
/**
* Constructs {@link Manifest}
*
* @param doc the {@link Document} in which XMLsignature is placed
*/
public Manifest(Document doc) {
super(doc);
XMLUtils.addReturnToElement(this.constructionElement);
this.references = new ArrayList();
}
/**
* Constructor Manifest
*
* @param element
* @param baseURI
* @throws XMLSecurityException
*/
public Manifest(Element element, String baseURI) throws XMLSecurityException {
this(element, baseURI, false);
}
/**
* Constructor Manifest
*
* @param element
* @param baseURI
* @param secureValidation
* @throws XMLSecurityException
*/
public Manifest(
Element element, String baseURI, boolean secureValidation
) throws XMLSecurityException {
super(element, baseURI);
Attr attr = element.getAttributeNodeNS(null, "Id");
if (attr != null) {
element.setIdAttributeNode(attr, true);
}
this.secureValidation = secureValidation;
// check out Reference children
this.referencesEl =
XMLUtils.selectDsNodes(
this.constructionElement.getFirstChild(), Constants._TAG_REFERENCE
);
int le = this.referencesEl.length;
if (le == 0) {
// At least one Reference must be present. Bad.
Object exArgs[] = { Constants._TAG_REFERENCE, Constants._TAG_MANIFEST };
throw new DOMException(DOMException.WRONG_DOCUMENT_ERR,
I18n.translate("xml.WrongContent", exArgs));
}
if (secureValidation && le > MAXIMUM_REFERENCE_COUNT) {
Object exArgs[] = { le, MAXIMUM_REFERENCE_COUNT };
throw new XMLSecurityException("signature.tooManyReferences", exArgs);
}
// create List
this.references = new ArrayList(le);
for (int i = 0; i < le; i++) {
Element refElem = referencesEl[i];
Attr refAttr = refElem.getAttributeNodeNS(null, "Id");
if (refAttr != null) {
refElem.setIdAttributeNode(refAttr, true);
}
this.references.add(null);
}
}
/**
* This addDocument method is used to add a new resource to the
* signed info. A {@link org.apache.xml.security.signature.Reference} is built
* from the supplied values.
*
* @param baseURI the URI of the resource where the XML instance was stored
* @param referenceURI URI attribute in Reference for specifying
* where data is
* @param transforms org.apache.xml.security.signature.Transforms object with an ordered
* list of transformations to be performed.
* @param digestURI The digest algorithm URI to be used.
* @param referenceId
* @param referenceType
* @throws XMLSignatureException
*/
public void addDocument(
String baseURI, String referenceURI, Transforms transforms,
String digestURI, String referenceId, String referenceType
) throws XMLSignatureException {
// the this.doc is handed implicitly by the this.getOwnerDocument()
Reference ref =
new Reference(this.doc, baseURI, referenceURI, this, transforms, digestURI);
if (referenceId != null) {
ref.setId(referenceId);
}
if (referenceType != null) {
ref.setType(referenceType);
}
// add Reference object to our cache vector
this.references.add(ref);
// add the Element of the Reference object to the Manifest/SignedInfo
this.constructionElement.appendChild(ref.getElement());
XMLUtils.addReturnToElement(this.constructionElement);
}
/**
* The calculation of the DigestValues in the References must be after the
* References are already added to the document and during the signing
* process. This ensures that all necessary data is in place.
*
* @throws ReferenceNotInitializedException
* @throws XMLSignatureException
*/
public void generateDigestValues()
throws XMLSignatureException, ReferenceNotInitializedException {
for (int i = 0; i < this.getLength(); i++) {
// update the cached Reference object, the Element content is automatically updated
Reference currentRef = this.references.get(i);
currentRef.generateDigestValue();
}
}
/**
* Return the nonnegative number of added references.
*
* @return the number of references
*/
public int getLength() {
return this.references.size();
}
/**
* Return the i th reference. Valid i
* values are 0 to {link@ getSize}-1.
*
* @param i Index of the requested {@link Reference}
* @return the i th reference
* @throws XMLSecurityException
*/
public Reference item(int i) throws XMLSecurityException {
if (this.references.get(i) == null) {
// not yet constructed, so _we_ have to
Reference ref =
new Reference(referencesEl[i], this.baseURI, this, secureValidation);
this.references.set(i, ref);
}
return this.references.get(i);
}
/**
* Sets the Id attribute
*
* @param Id the Id attribute in ds:Manifest
*/
public void setId(String Id) {
if (Id != null) {
this.constructionElement.setAttributeNS(null, Constants._ATT_ID, Id);
this.constructionElement.setIdAttributeNS(null, Constants._ATT_ID, true);
}
}
/**
* Returns the Id attribute
*
* @return the Id attribute in ds:Manifest
*/
public String getId() {
return this.constructionElement.getAttributeNS(null, Constants._ATT_ID);
}
/**
* Used to do a reference
* validation of all enclosed references using the {@link Reference#verify} method.
*
* This step loops through all {@link Reference}s and does verify the hash
* values. If one or more verifications fail, the method returns
* false. If all verifications are successful,
* it returns true. The results of the individual reference
* validations are available by using the {@link #getVerificationResult(int)} method
*
* @return true if all References verify, false if one or more do not verify.
* @throws MissingResourceFailureException if a {@link Reference} does not verify
* (throws a {@link org.apache.xml.security.signature.ReferenceNotInitializedException}
* because of an uninitialized {@link XMLSignatureInput}
* @see org.apache.xml.security.signature.Reference#verify
* @see org.apache.xml.security.signature.SignedInfo#verify()
* @see org.apache.xml.security.signature.MissingResourceFailureException
* @throws XMLSecurityException
*/
public boolean verifyReferences()
throws MissingResourceFailureException, XMLSecurityException {
return this.verifyReferences(false);
}
/**
* Used to do a reference
* validation of all enclosed references using the {@link Reference#verify} method.
*
*
This step loops through all {@link Reference}s and does verify the hash
* values. If one or more verifications fail, the method returns
* false. If all verifications are successful,
* it returns true. The results of the individual reference
* validations are available by using the {@link #getVerificationResult(int)} method
*
* @param followManifests
* @return true if all References verify, false if one or more do not verify.
* @throws MissingResourceFailureException if a {@link Reference} does not verify
* (throws a {@link org.apache.xml.security.signature.ReferenceNotInitializedException}
* because of an uninitialized {@link XMLSignatureInput}
* @see org.apache.xml.security.signature.Reference#verify
* @see org.apache.xml.security.signature.SignedInfo#verify(boolean)
* @see org.apache.xml.security.signature.MissingResourceFailureException
* @throws XMLSecurityException
*/
public boolean verifyReferences(boolean followManifests)
throws MissingResourceFailureException, XMLSecurityException {
if (referencesEl == null) {
this.referencesEl =
XMLUtils.selectDsNodes(
this.constructionElement.getFirstChild(), Constants._TAG_REFERENCE
);
}
if (log.isDebugEnabled()) {
log.debug("verify " + referencesEl.length + " References");
log.debug("I am " + (followManifests
? "" : "not") + " requested to follow nested Manifests");
}
if (referencesEl.length == 0) {
throw new XMLSecurityException("empty");
}
if (secureValidation && referencesEl.length > MAXIMUM_REFERENCE_COUNT) {
Object exArgs[] = { referencesEl.length, MAXIMUM_REFERENCE_COUNT };
throw new XMLSecurityException("signature.tooManyReferences", exArgs);
}
this.verificationResults = new boolean[referencesEl.length];
boolean verify = true;
for (int i = 0; i < this.referencesEl.length; i++) {
Reference currentRef =
new Reference(referencesEl[i], this.baseURI, this, secureValidation);
this.references.set(i, currentRef);
// if only one item does not verify, the whole verification fails
try {
boolean currentRefVerified = currentRef.verify();
this.setVerificationResult(i, currentRefVerified);
if (!currentRefVerified) {
verify = false;
}
if (log.isDebugEnabled()) {
log.debug("The Reference has Type " + currentRef.getType());
}
// was verification successful till now and do we want to verify the Manifest?
if (verify && followManifests && currentRef.typeIsReferenceToManifest()) {
if (log.isDebugEnabled()) {
log.debug("We have to follow a nested Manifest");
}
try {
XMLSignatureInput signedManifestNodes =
currentRef.dereferenceURIandPerformTransforms(null);
Set nl = signedManifestNodes.getNodeSet();
Manifest referencedManifest = null;
Iterator nlIterator = nl.iterator();
findManifest: while (nlIterator.hasNext()) {
Node n = nlIterator.next();
if ((n.getNodeType() == Node.ELEMENT_NODE)
&& ((Element) n).getNamespaceURI().equals(Constants.SignatureSpecNS)
&& ((Element) n).getLocalName().equals(Constants._TAG_MANIFEST)
) {
try {
referencedManifest =
new Manifest(
(Element)n, signedManifestNodes.getSourceURI(), secureValidation
);
break findManifest;
} catch (XMLSecurityException ex) {
if (log.isDebugEnabled()) {
log.debug(ex);
}
// Hm, seems not to be a ds:Manifest
}
}
}
if (referencedManifest == null) {
// The Reference stated that it points to a ds:Manifest
// but we did not find a ds:Manifest in the signed area
throw new MissingResourceFailureException("empty", currentRef);
}
referencedManifest.perManifestResolvers = this.perManifestResolvers;
referencedManifest.resolverProperties = this.resolverProperties;
boolean referencedManifestValid =
referencedManifest.verifyReferences(followManifests);
if (!referencedManifestValid) {
verify = false;
log.warn("The nested Manifest was invalid (bad)");
} else {
if (log.isDebugEnabled()) {
log.debug("The nested Manifest was valid (good)");
}
}
} catch (IOException ex) {
throw new ReferenceNotInitializedException("empty", ex);
} catch (ParserConfigurationException ex) {
throw new ReferenceNotInitializedException("empty", ex);
} catch (SAXException ex) {
throw new ReferenceNotInitializedException("empty", ex);
}
}
} catch (ReferenceNotInitializedException ex) {
Object exArgs[] = { currentRef.getURI() };
throw new MissingResourceFailureException(
"signature.Verification.Reference.NoInput", exArgs, ex, currentRef
);
}
}
return verify;
}
/**
* Method setVerificationResult
*
* @param index
* @param verify
*/
private void setVerificationResult(int index, boolean verify) {
if (this.verificationResults == null) {
this.verificationResults = new boolean[this.getLength()];
}
this.verificationResults[index] = verify;
}
/**
* After verifying a {@link Manifest} or a {@link SignedInfo} using the
* {@link Manifest#verifyReferences()} or {@link SignedInfo#verify()} methods,
* the individual results can be retrieved with this method.
*
* @param index an index of into a {@link Manifest} or a {@link SignedInfo}
* @return the results of reference validation at the specified index
* @throws XMLSecurityException
*/
public boolean getVerificationResult(int index) throws XMLSecurityException {
if ((index < 0) || (index > this.getLength() - 1)) {
Object exArgs[] = { Integer.toString(index), Integer.toString(this.getLength()) };
Exception e =
new IndexOutOfBoundsException(
I18n.translate("signature.Verification.IndexOutOfBounds", exArgs)
);
throw new XMLSecurityException("generic.EmptyMessage", e);
}
if (this.verificationResults == null) {
try {
this.verifyReferences();
} catch (Exception ex) {
throw new XMLSecurityException("generic.EmptyMessage", ex);
}
}
return this.verificationResults[index];
}
/**
* Adds Resource Resolver for retrieving resources at specified URI attribute
* in reference element
*
* @param resolver {@link ResourceResolver} can provide the implemenatin subclass of
* {@link ResourceResolverSpi} for retrieving resource.
*/
public void addResourceResolver(ResourceResolver resolver) {
if (resolver == null) {
return;
}
if (perManifestResolvers == null) {
perManifestResolvers = new ArrayList();
}
this.perManifestResolvers.add(resolver);
}
/**
* Adds Resource Resolver for retrieving resources at specified URI attribute
* in reference element
*
* @param resolverSpi the implementation subclass of {@link ResourceResolverSpi} for
* retrieving the resource.
*/
public void addResourceResolver(ResourceResolverSpi resolverSpi) {
if (resolverSpi == null) {
return;
}
if (perManifestResolvers == null) {
perManifestResolvers = new ArrayList();
}
perManifestResolvers.add(new ResourceResolver(resolverSpi));
}
/**
* Get the Per-Manifest Resolver List
* @return the per-manifest Resolver List
*/
public List getPerManifestResolvers() {
return perManifestResolvers;
}
/**
* Get the resolver property map
* @return the resolver property map
*/
public Map getResolverProperties() {
return resolverProperties;
}
/**
* Used to pass parameters like proxy servers etc to the ResourceResolver
* implementation.
*
* @param key the key
* @param value the value
*/
public void setResolverProperty(String key, String value) {
if (resolverProperties == null) {
resolverProperties = new HashMap(10);
}
this.resolverProperties.put(key, value);
}
/**
* Returns the value at specified key
*
* @param key the key
* @return the value
*/
public String getResolverProperty(String key) {
return this.resolverProperties.get(key);
}
/**
* Method getSignedContentItem
*
* @param i
* @return The signed content of the i reference.
*
* @throws XMLSignatureException
*/
public byte[] getSignedContentItem(int i) throws XMLSignatureException {
try {
return this.getReferencedContentAfterTransformsItem(i).getBytes();
} catch (IOException ex) {
throw new XMLSignatureException("empty", ex);
} catch (CanonicalizationException ex) {
throw new XMLSignatureException("empty", ex);
} catch (InvalidCanonicalizerException ex) {
throw new XMLSignatureException("empty", ex);
} catch (XMLSecurityException ex) {
throw new XMLSignatureException("empty", ex);
}
}
/**
* Method getReferencedContentPriorTransformsItem
*
* @param i
* @return The contents before transformation of the reference i.
* @throws XMLSecurityException
*/
public XMLSignatureInput getReferencedContentBeforeTransformsItem(int i)
throws XMLSecurityException {
return this.item(i).getContentsBeforeTransformation();
}
/**
* Method getReferencedContentAfterTransformsItem
*
* @param i
* @return The contents after transformation of the reference i.
* @throws XMLSecurityException
*/
public XMLSignatureInput getReferencedContentAfterTransformsItem(int i)
throws XMLSecurityException {
return this.item(i).getContentsAfterTransformation();
}
/**
* Method getSignedContentLength
*
* @return The number of references contained in this reference.
*/
public int getSignedContentLength() {
return this.getLength();
}
/**
* Method getBaseLocalName
*
* @inheritDoc
*/
public String getBaseLocalName() {
return Constants._TAG_MANIFEST;
}
}