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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.saml;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.util.List;
import javax.xml.crypto.dsig.SignatureMethod;
import javax.xml.crypto.dsig.SignedInfo;
import javax.xml.crypto.dsig.XMLSignContext;
import javax.xml.crypto.dsig.dom.DOMSignContext;
import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec;
import javax.xml.crypto.dsig.spec.ExcC14NParameterSpec;
import org.apache.wss4j.common.SignatureActionToken;
import org.apache.wss4j.common.WSEncryptionPart;
import org.apache.wss4j.common.crypto.Crypto;
import org.apache.wss4j.common.crypto.CryptoType;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.common.saml.OpenSAMLUtil;
import org.apache.wss4j.common.saml.SAMLKeyInfo;
import org.apache.wss4j.common.saml.SAMLUtil;
import org.apache.wss4j.common.saml.SamlAssertionWrapper;
import org.apache.wss4j.common.token.BinarySecurity;
import org.apache.wss4j.common.token.DOMX509Data;
import org.apache.wss4j.common.token.DOMX509IssuerSerial;
import org.apache.wss4j.common.token.Reference;
import org.apache.wss4j.common.token.SecurityTokenReference;
import org.apache.wss4j.common.token.X509Security;
import org.apache.wss4j.common.util.KeyUtils;
import org.apache.wss4j.dom.WSConstants;
import org.apache.wss4j.dom.WSDocInfo;
import org.apache.wss4j.dom.handler.RequestData;
import org.apache.wss4j.dom.message.WSSecHeader;
import org.apache.wss4j.dom.message.WSSecSignature;
import org.apache.wss4j.dom.transform.STRTransform;
import org.apache.wss4j.dom.util.WSSecurityUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
public class WSSecSignatureSAML extends WSSecSignature {
private static final org.slf4j.Logger LOG =
org.slf4j.LoggerFactory.getLogger(WSSecSignatureSAML.class);
private boolean senderVouches;
private SecurityTokenReference secRefSaml;
private String secRefID;
private Element samlToken;
private Crypto userCrypto;
private Crypto issuerCrypto;
private String issuerKeyName;
private String issuerKeyPW;
private boolean useDirectReferenceToAssertion;
/**
* Constructor.
*/
public WSSecSignatureSAML(WSSecHeader securityHeader) {
super(securityHeader);
}
public WSSecSignatureSAML(Document doc) {
super(doc);
}
/**
* Builds a signed soap envelope with SAML token.
*
* The method first gets an appropriate security header. According to the
* defined parameters for certificate handling the signature elements are
* constructed and inserted into the wsse:Signature
*
* @param uCrypto
* The user's Crypto instance
* @param samlAssertion
* the complete SAML assertion
* @param iCrypto
* An instance of the Crypto API to handle keystore SAML token
* issuer and to generate certificates
* @param iKeyName
* Private key to use in case of "sender-Vouches"
* @param iKeyPW
* Password for issuer private key
* @return A signed SOAP envelope as Document
* @throws WSSecurityException
*/
public Document build(
Crypto uCrypto, SamlAssertionWrapper samlAssertion,
Crypto iCrypto, String iKeyName, String iKeyPW
) throws WSSecurityException {
prepare(uCrypto, samlAssertion, iCrypto, iKeyName, iKeyPW);
if (getParts().isEmpty()) {
getParts().add(WSSecurityUtil.getDefaultEncryptionPart(getDocument()));
} else {
for (WSEncryptionPart part : getParts()) {
if ("STRTransform".equals(part.getName()) && part.getId() == null) {
part.setId(strUri);
}
}
}
//
// Add the STRTransform for the SecurityTokenReference to the SAML assertion
// if it exists
//
if (secRefID != null) {
String soapNamespace =
WSSecurityUtil.getSOAPNamespace(getDocument().getDocumentElement());
WSEncryptionPart encP =
new WSEncryptionPart("STRTransform", soapNamespace, "Content");
encP.setId(secRefID);
getParts().add(encP);
}
List referenceList = addReferencesToSign(getParts());
prependSAMLElementsToHeader();
if (senderVouches) {
computeSignature(referenceList, secRefSaml.getElement());
} else {
computeSignature(referenceList, samlToken);
}
//
// if we have a BST prepend it in front of the Signature according to
// strict layout rules.
//
if (bstToken != null) {
prependBSTElementToHeader();
}
return getDocument();
}
/**
* Initialize a WSSec SAML Signature.
*
* The method sets up and initializes a WSSec SAML Signature structure after
* the relevant information was set. After setup of the references to
* elements to sign may be added. After all references are added they can be
* signed.
*
* This method does not add the Signature element to the security header.
* See prependSignatureElementToHeader() method.
*
* @param uCrypto
* The user's Crypto instance
* @param samlAssertion
* the complete SAML assertion
* @param iCrypto
* An instance of the Crypto API to handle keystore SAML token
* issuer and to generate certificates
* @param iKeyName
* Private key to use in case of "sender-Vouches"
* @param iKeyPW
* Password for issuer private key
* @throws WSSecurityException
*/
public void prepare(
Crypto uCrypto, SamlAssertionWrapper samlAssertion, Crypto iCrypto,
String iKeyName, String iKeyPW
) throws WSSecurityException {
LOG.debug("Beginning ST signing...");
userCrypto = uCrypto;
issuerCrypto = iCrypto;
issuerKeyName = iKeyName;
issuerKeyPW = iKeyPW;
samlToken = samlAssertion.toDOM(getDocument());
//
// Get some information about the SAML token content. This controls how
// to deal with the whole stuff. First get the Authentication statement
// (includes Subject), then get the _first_ confirmation method only
// thats if "senderVouches" is true.
//
String confirmMethod = null;
List methods = samlAssertion.getConfirmationMethods();
if (methods != null && !methods.isEmpty()) {
confirmMethod = methods.get(0);
}
if (OpenSAMLUtil.isMethodSenderVouches(confirmMethod)) {
senderVouches = true;
}
//
// Gather some info about the document to process and store it for
// retrieval
//
if (super.getWsDocInfo() == null) {
WSDocInfo wsDocInfo = new WSDocInfo(getDocument());
super.setWsDocInfo(wsDocInfo);
}
X509Certificate[] certs = null;
PublicKey publicKey = null;
if (senderVouches) {
CryptoType cryptoType = new CryptoType(CryptoType.TYPE.ALIAS);
cryptoType.setAlias(issuerKeyName);
certs = issuerCrypto.getX509Certificates(cryptoType);
getWsDocInfo().setCrypto(issuerCrypto);
} else {
//
// in case of key holder: - get the user's certificate that _must_ be
// included in the SAML token. To ensure the cert integrity the SAML
// token must be signed (by the issuer).
//
if (userCrypto == null || !samlAssertion.isSigned()) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILURE,
"invalidSAMLsecurity",
new Object[] {"for SAML Signature (Key Holder)"});
}
if (secretKey == null) {
RequestData data = new RequestData();
data.setWsDocInfo(getWsDocInfo());
SignatureActionToken actionToken = new SignatureActionToken();
data.setSignatureToken(actionToken);
actionToken.setCrypto(userCrypto);
SAMLKeyInfo samlKeyInfo =
SAMLUtil.getCredentialFromSubject(
samlAssertion, new WSSSAMLKeyInfoProcessor(data),
userCrypto, data.getCallbackHandler()
);
if (samlKeyInfo != null) {
publicKey = samlKeyInfo.getPublicKey();
certs = samlKeyInfo.getCerts();
getWsDocInfo().setCrypto(userCrypto);
}
}
}
if ((certs == null || certs.length == 0 || certs[0] == null)
&& publicKey == null && secretKey == null) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILURE,
"noCertsFound",
new Object[] {"SAML signature"});
}
if (getSignatureAlgorithm() == null) {
PublicKey key = null;
if (certs != null && certs[0] != null) {
key = certs[0].getPublicKey();
} else if (publicKey != null) {
key = publicKey;
} else {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILURE, "unknownSignatureAlgorithm"
);
}
String pubKeyAlgo = key.getAlgorithm();
LOG.debug("automatic sig algo detection: {}", pubKeyAlgo);
if (pubKeyAlgo.equalsIgnoreCase("DSA")) {
setSignatureAlgorithm(WSConstants.DSA);
} else if (pubKeyAlgo.equalsIgnoreCase("RSA")) {
setSignatureAlgorithm(WSConstants.RSA);
} else {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILURE,
"unknownSignatureAlgorithm",
new Object[] {pubKeyAlgo});
}
}
sig = null;
try {
C14NMethodParameterSpec c14nSpec = null;
if (isAddInclusivePrefixes() && getSigCanonicalization().equals(WSConstants.C14N_EXCL_OMIT_COMMENTS)) {
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
List prefixes = getInclusivePrefixes(securityHeaderElement, false);
c14nSpec = new ExcC14NParameterSpec(prefixes);
}
c14nMethod =
signatureFactory.newCanonicalizationMethod(getSigCanonicalization(), c14nSpec);
} catch (Exception ex) {
LOG.error("", ex);
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_SIGNATURE, ex, "noXMLSig"
);
}
keyInfoUri = getIdAllocator().createSecureId("KeyId-", keyInfo);
SecurityTokenReference secRef = new SecurityTokenReference(getDocument());
strUri = getIdAllocator().createSecureId("STRId-", secRef);
secRef.setID(strUri);
setSecurityTokenReference(secRef);
if (certs != null && certs.length != 0) {
certUri = getIdAllocator().createSecureId("CertId-", certs[0]);
}
//
// If the sender vouches, then we must sign the SAML token _and_ at
// least one part of the message (usually the SOAP body). To do so we
// need to - put in a reference to the SAML token. Thus we create a STR
// and insert it into the wsse:Security header - set a reference of the
// created STR to the signature and use STR Transform during the
// signature
//
try {
if (senderVouches) {
secRefSaml = new SecurityTokenReference(getDocument());
secRefID = getIdAllocator().createSecureId("STRSAMLId-", secRefSaml);
secRefSaml.setID(secRefID);
if (useDirectReferenceToAssertion) {
Reference ref = new Reference(getDocument());
ref.setURI("#" + samlAssertion.getId());
if (samlAssertion.getSaml1() != null) {
ref.setValueType(WSConstants.WSS_SAML_KI_VALUE_TYPE);
secRefSaml.addTokenType(WSConstants.WSS_SAML_TOKEN_TYPE);
} else if (samlAssertion.getSaml2() != null) {
secRefSaml.addTokenType(WSConstants.WSS_SAML2_TOKEN_TYPE);
}
secRefSaml.setReference(ref);
} else {
Element keyId = getDocument().createElementNS(WSConstants.WSSE_NS, "wsse:KeyIdentifier");
String valueType = null;
if (samlAssertion.getSaml1() != null) {
valueType = WSConstants.WSS_SAML_KI_VALUE_TYPE;
secRefSaml.addTokenType(WSConstants.WSS_SAML_TOKEN_TYPE);
} else if (samlAssertion.getSaml2() != null) {
valueType = WSConstants.WSS_SAML2_KI_VALUE_TYPE;
secRefSaml.addTokenType(WSConstants.WSS_SAML2_TOKEN_TYPE);
}
keyId.setAttributeNS(
null, "ValueType", valueType
);
keyId.appendChild(getDocument().createTextNode(samlAssertion.getId()));
Element elem = secRefSaml.getElement();
elem.appendChild(keyId);
}
getWsDocInfo().addTokenElement(secRefSaml.getElement(), false);
}
} catch (Exception ex) {
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILED_SIGNATURE, ex, "noXMLSig"
);
}
X509Certificate cert = certs != null ? certs[0] : null;
configureKeyInfo(secRef, cert, iCrypto != null ? iCrypto : uCrypto, samlAssertion);
getWsDocInfo().addTokenElement(samlToken, false);
}
private void configureKeyInfo(
SecurityTokenReference secRef, X509Certificate cert,
Crypto crypto, SamlAssertionWrapper samlAssertion
) throws WSSecurityException {
if (getCustomKeyInfoElement() == null) {
if (senderVouches) {
switch (keyIdentifierType) {
case WSConstants.BST_DIRECT_REFERENCE:
Reference ref = new Reference(getDocument());
ref.setURI("#" + certUri);
BinarySecurity binarySecurity = new X509Security(getDocument());
((X509Security) binarySecurity).setX509Certificate(cert);
binarySecurity.setID(certUri);
bstToken = binarySecurity.getElement();
getWsDocInfo().addTokenElement(bstToken, false);
ref.setValueType(binarySecurity.getValueType());
secRef.setReference(ref);
break;
case WSConstants.X509_KEY_IDENTIFIER :
secRef.setKeyIdentifier(cert);
break;
case WSConstants.SKI_KEY_IDENTIFIER:
secRef.setKeyIdentifierSKI(cert, crypto);
break;
case WSConstants.THUMBPRINT_IDENTIFIER:
secRef.setKeyIdentifierThumb(cert);
break;
case WSConstants.ISSUER_SERIAL:
final String issuer = cert.getIssuerDN().getName();
final java.math.BigInteger serialNumber = cert.getSerialNumber();
final DOMX509IssuerSerial domIssuerSerial =
new DOMX509IssuerSerial(getDocument(), issuer, serialNumber);
final DOMX509Data domX509Data = new DOMX509Data(getDocument(), domIssuerSerial);
secRef.setUnknownElement(domX509Data.getElement());
break;
default:
throw new WSSecurityException(
WSSecurityException.ErrorCode.FAILURE, "unsupportedKeyId"
);
}
} else if (useDirectReferenceToAssertion) {
Reference ref = new Reference(getDocument());
ref.setURI("#" + samlAssertion.getId());
if (samlAssertion.getSaml1() != null) {
ref.setValueType(WSConstants.WSS_SAML_KI_VALUE_TYPE);
secRef.addTokenType(WSConstants.WSS_SAML_TOKEN_TYPE);
} else if (samlAssertion.getSaml2() != null) {
secRef.addTokenType(WSConstants.WSS_SAML2_TOKEN_TYPE);
}
secRef.setReference(ref);
} else {
Element keyId = getDocument().createElementNS(WSConstants.WSSE_NS, "wsse:KeyIdentifier");
String valueType = null;
if (samlAssertion.getSaml1() != null) {
valueType = WSConstants.WSS_SAML_KI_VALUE_TYPE;
secRef.addTokenType(WSConstants.WSS_SAML_TOKEN_TYPE);
} else if (samlAssertion.getSaml2() != null) {
valueType = WSConstants.WSS_SAML2_KI_VALUE_TYPE;
secRef.addTokenType(WSConstants.WSS_SAML2_TOKEN_TYPE);
}
keyId.setAttributeNS(
null, "ValueType", valueType
);
keyId.appendChild(getDocument().createTextNode(samlAssertion.getId()));
Element elem = secRef.getElement();
elem.appendChild(keyId);
}
}
marshalKeyInfo(getWsDocInfo());
}
/**
* Prepend the SAML elements to the elements already in the Security header.
*
* The method can be called any time after prepare(). This
* allows to insert the SAML elements at any position in the Security
* header.
*
* This methods first prepends the SAML security reference if mode is
* senderVouches, then the SAML token itself,
*/
public void prependSAMLElementsToHeader() {
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
if (senderVouches) {
WSSecurityUtil.prependChildElement(securityHeaderElement, secRefSaml.getElement());
}
WSSecurityUtil.prependChildElement(securityHeaderElement, samlToken);
}
/**
* 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,
Element siblingElement
) throws WSSecurityException {
try {
java.security.Key key;
if (senderVouches) {
key = issuerCrypto.getPrivateKey(issuerKeyName, issuerKeyPW);
} else if (secretKey != null) {
key = KeyUtils.prepareSecretKey(getSignatureAlgorithm(), secretKey);
} else {
key = userCrypto.getPrivateKey(user, password);
}
SignatureMethod signatureMethod =
signatureFactory.newSignatureMethod(getSignatureAlgorithm(), null);
SignedInfo signedInfo =
signatureFactory.newSignedInfo(c14nMethod, signatureMethod, referenceList);
sig = signatureFactory.newXMLSignature(
signedInfo,
keyInfo,
null,
getIdAllocator().createId("SIG-", null),
null);
Element securityHeaderElement = getSecurityHeader().getSecurityHeaderElement();
//
// Prepend the signature element to the security header (after the assertion)
//
XMLSignContext signContext = null;
if (siblingElement != null && siblingElement.getNextSibling() != null) {
signContext =
new DOMSignContext(key, securityHeaderElement, siblingElement.getNextSibling());
} else {
signContext = new DOMSignContext(key, securityHeaderElement);
}
if (getSignatureProvider() != null) {
signContext.setProperty("org.jcp.xml.dsig.internal.dom.SignatureProvider", getSignatureProvider());
}
signContext.putNamespacePrefix(WSConstants.SIG_NS, WSConstants.SIG_PREFIX);
if (WSConstants.C14N_EXCL_OMIT_COMMENTS.equals(getSigCanonicalization())) {
signContext.putNamespacePrefix(
WSConstants.C14N_EXCL_OMIT_COMMENTS,
WSConstants.C14N_EXCL_OMIT_COMMENTS_PREFIX
);
}
signContext.setProperty(STRTransform.TRANSFORM_WS_DOC_INFO, getWsDocInfo());
getWsDocInfo().setCallbackLookup(callbackLookup);
// Add the elements to sign to the Signature Context
getWsDocInfo().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
);
}
}
/**
* Return whether a Direct Reference is to be used to reference the assertion. The
* default is false.
* @return whether a Direct Reference is to be used to reference the assertion
*/
public boolean isUseDirectReferenceToAssertion() {
return useDirectReferenceToAssertion;
}
/**
* Set whether a Direct Reference is to be used to reference the assertion. The
* default is false.
* @param useDirectReferenceToAssertion whether a Direct Reference is to be used
* to reference the assertion
*/
public void setUseDirectReferenceToAssertion(boolean useDirectReferenceToAssertion) {
this.useDirectReferenceToAssertion = useDirectReferenceToAssertion;
}
}
