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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.wss4j.dom.message;
import java.security.NoSuchProviderException;
import java.security.Provider;
import java.util.List;
import javax.xml.crypto.XMLStructure;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.CanonicalizationMethod;
import javax.xml.crypto.dsig.SignatureMethod;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.XMLSignContext;
import javax.xml.crypto.dsig.XMLSignature;
import javax.xml.crypto.dsig.XMLSignatureFactory;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.keyinfo.KeyInfo;
import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.ExcC14NParameterSpec;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.apache.wss4j.common.WSEncryptionPart;
import org.apache.wss4j.common.derivedKey.ConversationConstants;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.common.token.Reference;
import org.apache.wss4j.common.token.SecurityTokenReference;
import org.apache.wss4j.common.util.KeyUtils;
import org.apache.wss4j.common.util.XMLUtils;
import org.apache.wss4j.dom.WSConstants;
import org.apache.wss4j.dom.WSDocInfo;
import org.apache.wss4j.dom.transform.STRTransform;
import org.apache.wss4j.dom.util.WSSecurityUtil;
/**
* Builder to sign with derived keys
*/
public class WSSecDKSign extends WSSecDerivedKeyBase {
private static final org.slf4j.Logger LOG =
org.slf4j.LoggerFactory.getLogger(WSSecDKSign.class);
private String sigAlgo = WSConstants.HMAC_SHA1;
private String digestAlgo = WSConstants.SHA1;
private String canonAlgo = WSConstants.C14N_EXCL_OMIT_COMMENTS;
private byte[] signatureValue;
private String keyInfoUri;
private SecurityTokenReference secRef;
private String strUri;
private WSDocInfo wsDocInfo;
private XMLSignatureFactory signatureFactory;
private XMLSignature sig;
private KeyInfo keyInfo;
private CanonicalizationMethod c14nMethod;
private int derivedKeyLength = -1;
private boolean addInclusivePrefixes = true;
public WSSecDKSign(WSSecHeader securityHeader) {
super(securityHeader);
init(null);
}
public WSSecDKSign(Document doc) {
this(doc, null);
}
public WSSecDKSign(Document doc, Provider provider) {
super(doc);
init(provider);
}
private void init(Provider provider) {
if (provider == null) {
// Try to install the Santuario Provider - fall back to the JDK provider if this does
// not work
try {
signatureFactory = XMLSignatureFactory.getInstance("DOM", "ApacheXMLDSig");
} catch (NoSuchProviderException ex) {
signatureFactory = XMLSignatureFactory.getInstance("DOM");
}
} else {
signatureFactory = XMLSignatureFactory.getInstance("DOM", provider);
}
}
public Document build(byte[] ephemeralKey) throws WSSecurityException {
prepare(ephemeralKey);
if (getParts().isEmpty()) {
getParts().add(WSSecurityUtil.getDefaultEncryptionPart(getDocument()));
} else {
for (WSEncryptionPart part : getParts()) {
if ("STRTransform".equals(part.getName()) && part.getId() == null) {
part.setId(strUri);
}
}
}
List referenceList = addReferencesToSign(getParts());
computeSignature(referenceList);
//
// prepend elements in the right order to the security header
//
prependDKElementToHeader();
return getDocument();
}
public void prepare(byte[] ephemeralKey) throws WSSecurityException {
super.prepare(ephemeralKey);
wsDocInfo = new WSDocInfo(getDocument());
sig = null;
try {
C14NMethodParameterSpec c14nSpec = null;
if (addInclusivePrefixes && canonAlgo.equals(WSConstants.C14N_EXCL_OMIT_COMMENTS)) {
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
List prefixes =
getInclusivePrefixes(securityHeaderElement, false);
c14nSpec = new ExcC14NParameterSpec(prefixes);
}
c14nMethod = signatureFactory.newCanonicalizationMethod(canonAlgo, c14nSpec);
} catch (Exception ex) {
LOG.error("", ex);
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_SIGNATURE, ex, "noXMLSig"
);
}
keyInfoUri = getIdAllocator().createSecureId("KI-", keyInfo);
secRef = new SecurityTokenReference(getDocument());
strUri = getIdAllocator().createSecureId("STR-", secRef);
secRef.setID(strUri);
if (addWSUNamespace) {
secRef.addWSUNamespace();
}
Reference ref = new Reference(getDocument());
ref.setURI("#" + getId());
String ns =
ConversationConstants.getWSCNs(getWscVersion())
+ ConversationConstants.TOKEN_TYPE_DERIVED_KEY_TOKEN;
ref.setValueType(ns);
secRef.setReference(ref);
XMLStructure structure = new DOMStructure(secRef.getElement());
wsDocInfo.addTokenElement(secRef.getElement(), false);
KeyInfoFactory keyInfoFactory = signatureFactory.getKeyInfoFactory();
keyInfo =
keyInfoFactory.newKeyInfo(
java.util.Collections.singletonList(structure), keyInfoUri
);
}
/**
* Returns the SignatureElement.
* The method can be called any time after prepare().
* @return The DOM Element of the signature.
*/
public Element getSignatureElement() {
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
return
XMLUtils.getDirectChildElement(
securityHeaderElement, WSConstants.SIG_LN, WSConstants.SIG_NS
);
}
/**
* This method adds references to the Signature.
*
* @param references The list of references to sign
* @throws WSSecurityException
*/
public List addReferencesToSign(
List references
) throws WSSecurityException {
return
addReferencesToSign(
getDocument(),
references,
wsDocInfo,
signatureFactory,
addInclusivePrefixes,
digestAlgo
);
}
/**
* Compute the Signature over the references.
*
* After references are set this method computes the Signature for them.
* This method can be called any time after the references were set. See
* addReferencesToSign().
*
* @throws WSSecurityException
*/
public void computeSignature(
List referenceList
) throws WSSecurityException {
computeSignature(referenceList, true, null);
}
/**
* Compute the Signature over the references.
*
* After references are set this method computes the Signature for them.
* This method can be called any time after the references were set. See
* addReferencesToSign().
*
* @throws WSSecurityException
*/
public void computeSignature(
List referenceList,
boolean prepend,
Element siblingElement
) throws WSSecurityException {
try {
java.security.Key key = getDerivedKey(sigAlgo);
SignatureMethod signatureMethod =
signatureFactory.newSignatureMethod(sigAlgo, null);
SignedInfo signedInfo =
signatureFactory.newSignedInfo(c14nMethod, signatureMethod, referenceList);
sig = signatureFactory.newXMLSignature(
signedInfo,
keyInfo,
null,
getIdAllocator().createId("SIG-", null),
null);
//
// Figure out where to insert the signature element
//
XMLSignContext signContext = null;
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
if (prepend) {
if (siblingElement == null) {
siblingElement = (Element)securityHeaderElement.getFirstChild();
}
if (siblingElement == null) {
signContext = new DOMSignContext(key, securityHeaderElement);
} else {
signContext = new DOMSignContext(key, securityHeaderElement, siblingElement);
}
} else {
signContext = new DOMSignContext(key, securityHeaderElement);
}
signContext.putNamespacePrefix(WSConstants.SIG_NS, WSConstants.SIG_PREFIX);
if (WSConstants.C14N_EXCL_OMIT_COMMENTS.equals(canonAlgo)) {
signContext.putNamespacePrefix(
WSConstants.C14N_EXCL_OMIT_COMMENTS,
WSConstants.C14N_EXCL_OMIT_COMMENTS_PREFIX
);
}
signContext.setProperty(STRTransform.TRANSFORM_WS_DOC_INFO, wsDocInfo);
wsDocInfo.setCallbackLookup(callbackLookup);
// Add the elements to sign to the Signature Context
wsDocInfo.setTokensOnContext((DOMSignContext)signContext);
sig.sign(signContext);
signatureValue = sig.getSignatureValue().getValue();
} catch (Exception ex) {
LOG.error(ex.getMessage(), ex);
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_SIGNATURE, ex
);
}
}
protected int getDerivedKeyLength() throws WSSecurityException {
return derivedKeyLength > 0 ? derivedKeyLength : KeyUtils.getKeyLength(sigAlgo);
}
public void setDerivedKeyLength(int keyLength) {
derivedKeyLength = keyLength;
}
/**
* Set the signature algorithm to use. The default is WSConstants.SHA1.
* @param algorithm the signature algorithm to use.
*/
public void setSignatureAlgorithm(String algorithm) {
sigAlgo = algorithm;
}
/**
* @return the signature algorithm to use
*/
public String getSignatureAlgorithm() {
return sigAlgo;
}
/**
* Returns the the value of wsu:Id attribute of the Signature element.
*
* @return Return the wsu:Id of this token or null if the signature has not been generated.
*/
public String getSignatureId() {
if (sig == null) {
return null;
}
return sig.getId();
}
/**
* Set the digest algorithm to use. The default is WSConstants.SHA1.
* @param algorithm the digest algorithm to use.
*/
public void setDigestAlgorithm(String algorithm) {
digestAlgo = algorithm;
}
/**
* @return the digest algorithm to use
*/
public String getDigestAlgorithm() {
return digestAlgo;
}
/**
* @return Returns the signatureValue.
*/
public byte[] getSignatureValue() {
return signatureValue;
}
/**
* Set the canonicalization method to use.
*
* If the canonicalization method is not set then the recommended Exclusive
* XML Canonicalization is used by default Refer to WSConstants which
* algorithms are supported.
*
* @param algo Is the name of the signature algorithm
* @see WSConstants#C14N_OMIT_COMMENTS
* @see WSConstants#C14N_WITH_COMMENTS
* @see WSConstants#C14N_EXCL_OMIT_COMMENTS
* @see WSConstants#C14N_EXCL_WITH_COMMENTS
*/
public void setSigCanonicalization(String algo) {
canonAlgo = algo;
}
/**
* Get the canonicalization method.
*
* If the canonicalization method was not set then Exclusive XML
* Canonicalization is used by default.
*
* @return The string describing the canonicalization algorithm.
*/
public String getSigCanonicalization() {
return canonAlgo;
}
public boolean isAddInclusivePrefixes() {
return addInclusivePrefixes;
}
public void setAddInclusivePrefixes(boolean addInclusivePrefixes) {
this.addInclusivePrefixes = addInclusivePrefixes;
}
}
