/**
* 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.wss4j.stax.impl.processor.input;
import org.apache.wss4j.binding.wss10.TransformationParametersType;
import org.apache.wss4j.common.bsp.BSPRule;
import org.apache.wss4j.common.cache.ReplayCache;
import org.apache.wss4j.common.ext.Attachment;
import org.apache.wss4j.common.ext.AttachmentRequestCallback;
import org.apache.wss4j.common.ext.AttachmentResultCallback;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.stax.impl.transformer.AttachmentContentSignatureTransform;
import org.apache.wss4j.stax.securityToken.SecurityTokenReference;
import org.apache.xml.security.binding.excc14n.InclusiveNamespaces;
import org.apache.xml.security.binding.xmldsig.CanonicalizationMethodType;
import org.apache.xml.security.binding.xmldsig.ReferenceType;
import org.apache.xml.security.binding.xmldsig.SignatureType;
import org.apache.xml.security.binding.xmldsig.TransformType;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.stax.ext.*;
import org.apache.xml.security.stax.ext.stax.XMLSecEvent;
import org.apache.xml.security.stax.ext.stax.XMLSecStartElement;
import org.apache.xml.security.stax.impl.processor.input.AbstractSignatureReferenceVerifyInputProcessor;
import org.apache.xml.security.stax.impl.transformer.canonicalizer.Canonicalizer20010315_Excl;
import org.apache.xml.security.stax.impl.util.DigestOutputStream;
import org.apache.xml.security.stax.impl.util.UnsynchronizedBufferedOutputStream;
import org.apache.xml.security.stax.securityEvent.AlgorithmSuiteSecurityEvent;
import org.apache.xml.security.stax.securityEvent.SignedElementSecurityEvent;
import org.apache.wss4j.stax.ext.*;
import org.apache.wss4j.stax.securityEvent.SignedPartSecurityEvent;
import org.apache.wss4j.stax.securityEvent.TimestampSecurityEvent;
import org.apache.xml.security.stax.securityToken.InboundSecurityToken;
import org.apache.xml.security.stax.securityToken.SecurityToken;
import org.apache.xml.security.stax.securityToken.SecurityTokenProvider;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.*;
public class WSSSignatureReferenceVerifyInputProcessor extends AbstractSignatureReferenceVerifyInputProcessor {
private boolean replayChecked = false;
public WSSSignatureReferenceVerifyInputProcessor(InputProcessorChain inputProcessorChain,
SignatureType signatureType, InboundSecurityToken inboundSecurityToken,
XMLSecurityProperties securityProperties) throws XMLSecurityException {
super(inputProcessorChain, signatureType, inboundSecurityToken, securityProperties);
this.addAfterProcessor(WSSSignatureReferenceVerifyInputProcessor.class.getName());
checkBSPCompliance((WSInboundSecurityContext)inputProcessorChain.getSecurityContext());
}
@Override
protected void verifyExternalReference(
InputProcessorChain inputProcessorChain, InputStream inputStream,
final ReferenceType referenceType) throws XMLSecurityException, XMLStreamException {
if (referenceType.getURI().startsWith("cid:")) {
CallbackHandler attachmentCallbackHandler =
((WSSSecurityProperties) getSecurityProperties()).getAttachmentCallbackHandler();
if (attachmentCallbackHandler == null) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY,
"empty", "no attachment callbackhandler supplied"
);
}
String attachmentId = referenceType.getURI().substring(4);
AttachmentRequestCallback attachmentRequestCallback = new AttachmentRequestCallback();
attachmentRequestCallback.setAttachmentId(attachmentId);
try {
attachmentCallbackHandler.handle(new Callback[]{attachmentRequestCallback});
} catch (Exception e) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY, e);
}
List<Attachment> attachments = attachmentRequestCallback.getAttachments();
if (attachments == null || attachments.isEmpty() || !attachmentId.equals(attachments.get(0).getId())) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY,
"empty", "Attachment not found"
);
}
final Attachment attachment = attachments.get(0);
InputStream attachmentInputStream = attachment.getSourceStream();
if (!attachmentInputStream.markSupported()) {
attachmentInputStream = new BufferedInputStream(attachmentInputStream);
}
//todo workaround 2GB limit somehow?
attachmentInputStream.mark(Integer.MAX_VALUE); //we can process at maximum 2G with the standard jdk streams
try {
DigestOutputStream digestOutputStream =
createMessageDigestOutputStream(referenceType, inputProcessorChain.getSecurityContext());
UnsynchronizedBufferedOutputStream bufferedDigestOutputStream =
new UnsynchronizedBufferedOutputStream(digestOutputStream);
if (referenceType.getTransforms() != null) {
Transformer transformer =
buildTransformerChain(referenceType, bufferedDigestOutputStream, inputProcessorChain, null);
if (!(transformer instanceof AttachmentContentSignatureTransform)) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY,
"empty", "First transform must be Attachment[Content|Complete]SignatureTransform"
);
}
Map<String, Object> transformerProperties = new HashMap<String, Object>(2);
transformerProperties.put(
AttachmentContentSignatureTransform.ATTACHMENT, attachment);
transformer.setProperties(transformerProperties);
transformer.transform(attachmentInputStream);
bufferedDigestOutputStream.close();
} else {
XMLSecurityUtils.copy(attachmentInputStream, bufferedDigestOutputStream);
bufferedDigestOutputStream.close();
}
compareDigest(digestOutputStream.getDigestValue(), referenceType);
//reset the inputStream to be able to reuse it
attachmentInputStream.reset();
} catch (IOException e) {
throw new XMLSecurityException(e);
}
//create a new attachment and do the result callback
final Attachment resultAttachment = new Attachment();
resultAttachment.setId(attachmentId);
resultAttachment.setMimeType(attachment.getMimeType());
resultAttachment.addHeaders(attachment.getHeaders());
resultAttachment.setSourceStream(attachmentInputStream);
AttachmentResultCallback attachmentResultCallback = new AttachmentResultCallback();
attachmentResultCallback.setAttachmentId(attachmentId);
attachmentResultCallback.setAttachment(resultAttachment);
try {
attachmentCallbackHandler.handle(new Callback[]{attachmentResultCallback});
} catch (Exception e) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.INVALID_SECURITY, e);
}
// Create a security event for this signed Attachment
final DocumentContext documentContext = inputProcessorChain.getDocumentContext();
SignedPartSecurityEvent signedPartSecurityEvent =
new SignedPartSecurityEvent(getInboundSecurityToken(), true, documentContext.getProtectionOrder());
signedPartSecurityEvent.setAttachment(true);
signedPartSecurityEvent.setCorrelationID(referenceType.getId());
inputProcessorChain.getSecurityContext().registerSecurityEvent(signedPartSecurityEvent);
} else {
super.verifyExternalReference(
inputProcessorChain, inputStream, referenceType);
}
}
private void checkBSPCompliance(WSInboundSecurityContext securityContext) throws WSSecurityException {
List<ReferenceType> references = getSignatureType().getSignedInfo().getReference();
for (int i = 0; i < references.size(); i++) {
ReferenceType referenceType = references.get(i);
if (referenceType.getTransforms() == null) {
securityContext.handleBSPRule(BSPRule.R5416);
} else if (referenceType.getTransforms().getTransform().size() == 0) {
securityContext.handleBSPRule(BSPRule.R5411);
} else {
List<TransformType> transformTypes = referenceType.getTransforms().getTransform();
for (int j = 0; j < transformTypes.size(); j++) {
TransformType transformType = transformTypes.get(j);
final String algorithm = transformType.getAlgorithm();
if (!WSSConstants.NS_C14N_EXCL.equals(algorithm)
&& !WSSConstants.NS_XMLDSIG_FILTER2.equals(algorithm)
&& !WSSConstants.SOAPMESSAGE_NS10_STRTransform.equals(algorithm)
&& !WSSConstants.NS_XMLDSIG_ENVELOPED_SIGNATURE.equals(algorithm)
&& !WSSConstants.SWA_ATTACHMENT_CONTENT_SIG_TRANS.equals(algorithm)
&& !WSSConstants.SWA_ATTACHMENT_COMPLETE_SIG_TRANS.equals(algorithm)) {
securityContext.handleBSPRule(BSPRule.R5423);
if (j == transformTypes.size() - 1 &&
!WSSConstants.NS_C14N_EXCL.equals(algorithm)
&& !WSSConstants.SOAPMESSAGE_NS10_STRTransform.equals(algorithm)
&& !WSSConstants.SWA_ATTACHMENT_CONTENT_SIG_TRANS.equals(algorithm)
&& !WSSConstants.SWA_ATTACHMENT_COMPLETE_SIG_TRANS.equals(algorithm)) {
securityContext.handleBSPRule(BSPRule.R5412);
}
InclusiveNamespaces inclusiveNamespacesType = XMLSecurityUtils.getQNameType(transformType.getContent(), XMLSecurityConstants.TAG_c14nExcl_InclusiveNamespaces);
if (WSSConstants.NS_C14N_EXCL.equals(algorithm)
&& inclusiveNamespacesType != null
&& inclusiveNamespacesType.getPrefixList().size() == 0) {
securityContext.handleBSPRule(BSPRule.R5407);
}
if (WSSConstants.SOAPMESSAGE_NS10_STRTransform.equals(algorithm)) {
if (inclusiveNamespacesType != null
&& inclusiveNamespacesType.getPrefixList().size() == 0) {
securityContext.handleBSPRule(BSPRule.R5413);
}
TransformationParametersType transformationParametersType =
XMLSecurityUtils.getQNameType(transformType.getContent(), WSSConstants.TAG_wsse_TransformationParameters);
if (transformationParametersType == null) {
securityContext.handleBSPRule(BSPRule.R3065);
} else {
CanonicalizationMethodType canonicalizationMethodType =
XMLSecurityUtils.getQNameType(transformationParametersType.getAny(), WSSConstants.TAG_dsig_CanonicalizationMethod);
if (canonicalizationMethodType == null) {
securityContext.handleBSPRule(BSPRule.R3065);
}
}
}
}
}
}
if (!(WSSConstants.NS_XMLDSIG_SHA1.equals(referenceType.getDigestMethod().getAlgorithm())
|| WSSConstants.NS_XENC_SHA256.equals(referenceType.getDigestMethod().getAlgorithm())
|| WSSConstants.NS_XENC_SHA512.equals(referenceType.getDigestMethod().getAlgorithm()))) {
// Weakening this a bit to allow SHA > 1
securityContext.handleBSPRule(BSPRule.R5420);
}
}
}
@Override
public XMLSecEvent processNextEvent(InputProcessorChain inputProcessorChain) throws XMLStreamException, XMLSecurityException {
//this is the earliest possible point to check for an replay attack
if (!replayChecked) {
replayChecked = true;
detectReplayAttack(inputProcessorChain);
}
return super.processNextEvent(inputProcessorChain);
}
@Override
protected void processElementPath(List<QName> elementPath, InputProcessorChain inputProcessorChain,
XMLSecEvent xmlSecEvent, ReferenceType referenceType)
throws XMLSecurityException {
//fire a SecurityEvent:
final DocumentContext documentContext = inputProcessorChain.getDocumentContext();
if (elementPath.size() == 3 && WSSUtils.isInSOAPHeader(elementPath)
|| elementPath.size() == 2 && WSSUtils.isInSOAPBody(elementPath)) {
SignedPartSecurityEvent signedPartSecurityEvent =
new SignedPartSecurityEvent(getInboundSecurityToken(), true, documentContext.getProtectionOrder());
signedPartSecurityEvent.setElementPath(elementPath);
signedPartSecurityEvent.setXmlSecEvent(xmlSecEvent);
signedPartSecurityEvent.setCorrelationID(referenceType.getId());
inputProcessorChain.getSecurityContext().registerSecurityEvent(signedPartSecurityEvent);
} else {
SignedElementSecurityEvent signedElementSecurityEvent =
new SignedElementSecurityEvent(getInboundSecurityToken(), true, documentContext.getProtectionOrder());
signedElementSecurityEvent.setElementPath(elementPath);
signedElementSecurityEvent.setXmlSecEvent(xmlSecEvent);
signedElementSecurityEvent.setCorrelationID(referenceType.getId());
inputProcessorChain.getSecurityContext().registerSecurityEvent(signedElementSecurityEvent);
}
}
@Override
protected InternalSignatureReferenceVerifier getSignatureReferenceVerifier(
XMLSecurityProperties securityProperties, InputProcessorChain inputProcessorChain,
ReferenceType referenceType, XMLSecStartElement startElement) throws XMLSecurityException {
return new InternalSignatureReferenceVerifier((WSSSecurityProperties) securityProperties,
inputProcessorChain, referenceType, startElement);
}
private void detectReplayAttack(InputProcessorChain inputProcessorChain) throws WSSecurityException {
TimestampSecurityEvent timestampSecurityEvent =
inputProcessorChain.getSecurityContext().get(WSSConstants.PROP_TIMESTAMP_SECURITYEVENT);
ReplayCache replayCache =
((WSSSecurityProperties)getSecurityProperties()).getTimestampReplayCache();
if (timestampSecurityEvent != null && replayCache != null) {
final String cacheKey = String.valueOf(
timestampSecurityEvent.getCreated().getTimeInMillis()) +
"" + Arrays.hashCode(getSignatureType().getSignatureValue().getValue());
if (replayCache.contains(cacheKey)) {
throw new WSSecurityException(WSSecurityException.ErrorCode.MESSAGE_EXPIRED);
}
// Store the Timestamp/SignatureValue combination in the cache
Calendar expiresCal = timestampSecurityEvent.getExpires();
if (expiresCal != null) {
Date rightNow = new Date();
long currentTime = rightNow.getTime();
long expiresTime = expiresCal.getTimeInMillis();
replayCache.add(cacheKey, 1L + (expiresTime - currentTime) / 1000L);
} else {
replayCache.add(cacheKey);
}
}
}
@Override
protected Transformer buildTransformerChain(
ReferenceType referenceType, OutputStream outputStream,
InputProcessorChain inputProcessorChain,
AbstractSignatureReferenceVerifyInputProcessor.InternalSignatureReferenceVerifier internalSignatureReferenceVerifier)
throws XMLSecurityException {
if (referenceType.getTransforms() == null || referenceType.getTransforms().getTransform().size() == 0) {
throw new WSSecurityException(WSSecurityException.ErrorCode.INVALID_SECURITY);
}
List<TransformType> transformTypeList = referenceType.getTransforms().getTransform();
if (transformTypeList.size() > maximumAllowedTransformsPerReference) {
throw new WSSecurityException(WSSecurityException.ErrorCode.INVALID_SECURITY,
"secureProcessing.MaximumAllowedTransformsPerReference",
transformTypeList.size(),
maximumAllowedTransformsPerReference);
}
String algorithm = null;
Transformer parentTransformer = null;
for (int i = transformTypeList.size() - 1; i >= 0; i--) {
TransformType transformType = transformTypeList.get(i);
TransformationParametersType transformationParametersType =
XMLSecurityUtils.getQNameType(transformType.getContent(), WSSConstants.TAG_wsse_TransformationParameters);
if (transformationParametersType != null) {
CanonicalizationMethodType canonicalizationMethodType =
XMLSecurityUtils.getQNameType(transformationParametersType.getAny(), WSSConstants.TAG_dsig_CanonicalizationMethod);
if (canonicalizationMethodType != null) {
algorithm = canonicalizationMethodType.getAlgorithm();
InclusiveNamespaces inclusiveNamespacesType =
XMLSecurityUtils.getQNameType(canonicalizationMethodType.getContent(), XMLSecurityConstants.TAG_c14nExcl_InclusiveNamespaces);
Map<String, Object> transformerProperties = null;
if (inclusiveNamespacesType != null) {
transformerProperties = new HashMap<String, Object>();
transformerProperties.put(
Canonicalizer20010315_Excl.INCLUSIVE_NAMESPACES_PREFIX_LIST,
inclusiveNamespacesType.getPrefixList());
}
parentTransformer = WSSUtils.getTransformer(
null, outputStream, transformerProperties, algorithm, XMLSecurityConstants.DIRECTION.IN);
}
}
algorithm = transformType.getAlgorithm();
AlgorithmSuiteSecurityEvent algorithmSuiteSecurityEvent = new AlgorithmSuiteSecurityEvent();
algorithmSuiteSecurityEvent.setAlgorithmURI(algorithm);
algorithmSuiteSecurityEvent.setAlgorithmUsage(WSSConstants.SigTransform);
algorithmSuiteSecurityEvent.setCorrelationID(referenceType.getId());
inputProcessorChain.getSecurityContext().registerSecurityEvent(algorithmSuiteSecurityEvent);
InclusiveNamespaces inclusiveNamespacesType =
XMLSecurityUtils.getQNameType(transformType.getContent(), XMLSecurityConstants.TAG_c14nExcl_InclusiveNamespaces);
Map<String, Object> transformerProperties = null;
if (inclusiveNamespacesType != null) {
transformerProperties = new HashMap<String, Object>();
transformerProperties.put(
Canonicalizer20010315_Excl.INCLUSIVE_NAMESPACES_PREFIX_LIST,
inclusiveNamespacesType.getPrefixList());
}
if (parentTransformer != null) {
parentTransformer = WSSUtils.getTransformer(
parentTransformer, null, transformerProperties, algorithm, XMLSecurityConstants.DIRECTION.IN);
} else {
parentTransformer = WSSUtils.getTransformer(
null, outputStream, transformerProperties, algorithm, XMLSecurityConstants.DIRECTION.IN);
}
}
if (WSSConstants.SOAPMESSAGE_NS10_STRTransform.equals(algorithm)) {
internalSignatureReferenceVerifier.setTransformer(parentTransformer);
SecurityTokenProvider<? extends InboundSecurityToken> securityTokenProvider =
inputProcessorChain.getSecurityContext().getSecurityTokenProvider(XMLSecurityUtils.dropReferenceMarker(referenceType.getURI()));
if (securityTokenProvider == null) {
throw new WSSecurityException(WSSecurityException.ErrorCode.INVALID_SECURITY_TOKEN, "noReference");
}
SecurityToken securityToken = securityTokenProvider.getSecurityToken();
if (!(securityToken instanceof SecurityTokenReference)) {
throw new WSSecurityException(WSSecurityException.ErrorCode.UNSUPPORTED_SECURITY_TOKEN);
}
SecurityTokenReference securityTokenReference = (SecurityTokenReference) securityToken;
//todo analyse and fix me: the following statement could be problematic
inputProcessorChain.getDocumentContext().setIsInSignedContent(inputProcessorChain.getProcessors().indexOf(internalSignatureReferenceVerifier), internalSignatureReferenceVerifier);
XMLSecStartElement xmlSecStartElement = securityTokenReference.getXmlSecEvents().getLast().asStartElement();
internalSignatureReferenceVerifier.setStartElement(xmlSecStartElement);
Iterator<XMLSecEvent> xmlSecEventIterator = securityTokenReference.getXmlSecEvents().descendingIterator();
try {
while (xmlSecEventIterator.hasNext()) {
internalSignatureReferenceVerifier.processEvent(xmlSecEventIterator.next(), inputProcessorChain);
}
} catch (XMLStreamException e) {
throw new WSSecurityException(WSSecurityException.ErrorCode.INVALID_SECURITY, e);
}
}
return parentTransformer;
}
class InternalSignatureReferenceVerifier extends AbstractSignatureReferenceVerifyInputProcessor.InternalSignatureReferenceVerifier {
InternalSignatureReferenceVerifier(WSSSecurityProperties securityProperties, InputProcessorChain inputProcessorChain,
ReferenceType referenceType, XMLSecStartElement startElement) throws XMLSecurityException {
super(securityProperties, inputProcessorChain, referenceType, startElement);
this.addAfterProcessor(WSSSignatureReferenceVerifyInputProcessor.class.getName());
}
}
}