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The Apache WSS4J project provides a Java implementation of the primary security standards
for Web Services, namely the OASIS Web Services Security (WS-Security) specifications
from the OASIS Web Services Security TC.
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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.ws.security.saml;
import org.apache.ws.security.WSConstants;
import org.apache.ws.security.WSDerivedKeyTokenPrincipal;
import org.apache.ws.security.WSDocInfo;
import org.apache.ws.security.WSPasswordCallback;
import org.apache.ws.security.WSSecurityEngine;
import org.apache.ws.security.WSSecurityEngineResult;
import org.apache.ws.security.WSSecurityException;
import org.apache.ws.security.components.crypto.AlgorithmSuite;
import org.apache.ws.security.components.crypto.AlgorithmSuiteValidator;
import org.apache.ws.security.components.crypto.CryptoType;
import org.apache.ws.security.handler.RequestData;
import org.apache.ws.security.message.token.SecurityTokenReference;
import org.apache.ws.security.processor.EncryptedKeyProcessor;
import org.apache.ws.security.processor.Processor;
import org.apache.ws.security.saml.ext.AssertionWrapper;
import org.apache.ws.security.str.STRParser;
import org.apache.ws.security.str.SignatureSTRParser;
import org.apache.ws.security.util.Base64;
import org.apache.ws.security.util.WSSecurityUtil;
import org.opensaml.saml2.core.SubjectConfirmationData;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.Text;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.xml.crypto.XMLStructure;
import javax.xml.crypto.dom.DOMStructure;
import javax.xml.crypto.dsig.keyinfo.KeyInfoFactory;
import javax.xml.crypto.dsig.keyinfo.KeyValue;
import javax.xml.crypto.dsig.keyinfo.X509Data;
import javax.xml.crypto.dsig.keyinfo.X509IssuerSerial;
import javax.xml.namespace.QName;
import java.security.NoSuchProviderException;
import java.security.Principal;
import java.security.PublicKey;
import java.security.cert.X509Certificate;
import java.util.HashMap;
import java.util.List;
/**
* Utility methods for SAML stuff
*/
public final class SAMLUtil {
private static final QName BINARY_SECRET =
new QName(WSConstants.WST_NS, "BinarySecret");
private static final QName BINARY_SECRET_05_12 =
new QName(WSConstants.WST_NS_05_12, "BinarySecret");
private SAMLUtil() {
// Complete
}
/**
* Get an AssertionWrapper object from parsing a SecurityTokenReference that uses
* a KeyIdentifier that points to a SAML Assertion.
*
* @param secRef the SecurityTokenReference to the SAML Assertion
* @param strElement The SecurityTokenReference DOM element
* @param request The RequestData instance used to obtain configuration
* @param wsDocInfo The WSDocInfo object that holds previous results
* @return an AssertionWrapper object
* @throws WSSecurityException
*/
public static AssertionWrapper getAssertionFromKeyIdentifier(
SecurityTokenReference secRef,
Element strElement,
RequestData request,
WSDocInfo wsDocInfo
) throws WSSecurityException {
String keyIdentifierValue = secRef.getKeyIdentifierValue();
String type = secRef.getKeyIdentifierValueType();
WSSecurityEngineResult result = wsDocInfo.getResult(keyIdentifierValue);
AssertionWrapper assertion = null;
Element token = null;
if (result != null) {
assertion =
(AssertionWrapper)result.get(WSSecurityEngineResult.TAG_SAML_ASSERTION);
return assertion;
} else {
token =
secRef.findProcessedTokenElement(
strElement.getOwnerDocument(), wsDocInfo,
request.getCallbackHandler(),
keyIdentifierValue, type
);
if (token != null) {
if (!"Assertion".equals(token.getLocalName())) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLsecurity"
);
}
return new AssertionWrapper(token);
}
token =
secRef.findUnprocessedTokenElement(
strElement.getOwnerDocument(), wsDocInfo,
request.getCallbackHandler(), keyIdentifierValue, type
);
if (token == null || !"Assertion".equals(token.getLocalName())) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLsecurity"
);
}
Processor proc = request.getWssConfig().getProcessor(WSSecurityEngine.SAML_TOKEN);
List samlResult =
proc.handleToken(token, request, wsDocInfo);
return
(AssertionWrapper)samlResult.get(0).get(
WSSecurityEngineResult.TAG_SAML_ASSERTION
);
}
}
/**
* Parse a SAML Assertion to obtain a SAMLKeyInfo object from
* the Subject of the assertion
*
* @param assertion The SAML Assertion
* @param data The RequestData instance used to obtain configuration
* @param docInfo A WSDocInfo instance
* @param bspCompliant Whether to process tokens in compliance with the BSP spec or not
* @return a SAMLKeyInfo object
* @throws WSSecurityException
*/
public static SAMLKeyInfo getCredentialFromSubject(
AssertionWrapper assertion,
RequestData data,
WSDocInfo docInfo,
boolean bspCompliant
) throws WSSecurityException {
if (assertion.getSaml1() != null) {
return getCredentialFromSubject(assertion.getSaml1(), data, docInfo, bspCompliant);
} else {
return getCredentialFromSubject(assertion.getSaml2(), data, docInfo, bspCompliant);
}
}
/**
* Try to get the secret key from a CallbackHandler implementation
* @param cb a CallbackHandler implementation
* @return An array of bytes corresponding to the secret key (can be null)
* @throws WSSecurityException
*/
private static byte[] getSecretKeyFromCallbackHandler(
String id,
CallbackHandler cb
) throws WSSecurityException {
if (cb != null) {
WSPasswordCallback pwcb =
new WSPasswordCallback(id, WSPasswordCallback.SECRET_KEY);
try {
cb.handle(new Callback[]{pwcb});
} catch (Exception e1) {
throw new WSSecurityException(WSSecurityException.FAILURE, "noKey",
new Object[] { id }, e1);
}
return pwcb.getKey();
}
return null;
}
/**
* Get the SAMLKeyInfo object corresponding to the credential stored in the Subject of a
* SAML 1.1 assertion
* @param assertion The SAML 1.1 assertion
* @param data The RequestData instance used to obtain configuration
* @param docInfo A WSDocInfo instance
* @param bspCompliant Whether to process tokens in compliance with the BSP spec or not
* @return The SAMLKeyInfo object obtained from the Subject
* @throws WSSecurityException
*/
public static SAMLKeyInfo getCredentialFromSubject(
org.opensaml.saml1.core.Assertion assertion,
RequestData data,
WSDocInfo docInfo,
boolean bspCompliant
) throws WSSecurityException {
// First try to get the credential from a CallbackHandler
byte[] key = getSecretKeyFromCallbackHandler(assertion.getID(), data.getCallbackHandler());
if (key != null && key.length > 0) {
return new SAMLKeyInfo(key);
}
for (org.opensaml.saml1.core.Statement stmt : assertion.getStatements()) {
org.opensaml.saml1.core.Subject samlSubject = null;
if (stmt instanceof org.opensaml.saml1.core.AttributeStatement) {
org.opensaml.saml1.core.AttributeStatement attrStmt =
(org.opensaml.saml1.core.AttributeStatement) stmt;
samlSubject = attrStmt.getSubject();
} else if (stmt instanceof org.opensaml.saml1.core.AuthenticationStatement) {
org.opensaml.saml1.core.AuthenticationStatement authStmt =
(org.opensaml.saml1.core.AuthenticationStatement) stmt;
samlSubject = authStmt.getSubject();
} else {
org.opensaml.saml1.core.AuthorizationDecisionStatement authzStmt =
(org.opensaml.saml1.core.AuthorizationDecisionStatement)stmt;
samlSubject = authzStmt.getSubject();
}
if (samlSubject == null) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLToken",
new Object[] {"for Signature (no Subject)"}
);
}
Element sub = samlSubject.getSubjectConfirmation().getDOM();
Element keyInfoElement =
WSSecurityUtil.getDirectChildElement(sub, "KeyInfo", WSConstants.SIG_NS);
if (keyInfoElement != null) {
return getCredentialFromKeyInfo(keyInfoElement, data, docInfo, bspCompliant);
}
}
return null;
}
/**
* Get the SAMLKeyInfo object corresponding to the credential stored in the Subject of a
* SAML 2 assertion
* @param assertion The SAML 2 assertion
* @param data The RequestData instance used to obtain configuration
* @param docInfo A WSDocInfo instance
* @param bspCompliant Whether to process tokens in compliance with the BSP spec or not
* @return The SAMLKeyInfo object obtained from the Subject
* @throws WSSecurityException
*/
public static SAMLKeyInfo getCredentialFromSubject(
org.opensaml.saml2.core.Assertion assertion,
RequestData data,
WSDocInfo docInfo,
boolean bspCompliant
) throws WSSecurityException {
// First try to get the credential from a CallbackHandler
byte[] key = getSecretKeyFromCallbackHandler(assertion.getID(), data.getCallbackHandler());
if (key != null && key.length > 0) {
return new SAMLKeyInfo(key);
}
org.opensaml.saml2.core.Subject samlSubject = assertion.getSubject();
if (samlSubject == null) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLToken",
new Object[]{"for Signature (no Subject)"}
);
}
List subjectConfList =
samlSubject.getSubjectConfirmations();
for (org.opensaml.saml2.core.SubjectConfirmation subjectConfirmation : subjectConfList) {
SubjectConfirmationData subjConfData =
subjectConfirmation.getSubjectConfirmationData();
Element sub = subjConfData.getDOM();
Element keyInfoElement =
WSSecurityUtil.getDirectChildElement(sub, "KeyInfo", WSConstants.SIG_NS);
if (keyInfoElement != null) {
return getCredentialFromKeyInfo(keyInfoElement, data, docInfo, bspCompliant);
}
}
return null;
}
/**
* This method returns a SAMLKeyInfo corresponding to the credential found in the
* KeyInfo (DOM Element) argument.
* @param keyInfoElement The KeyInfo as a DOM Element
* @param data The RequestData instance used to obtain configuration
* @param docInfo A WSDocInfo instance
* @param bspCompliant Whether to process tokens in compliance with the BSP spec or not
* @return The credential (as a SAMLKeyInfo object)
* @throws WSSecurityException
*/
public static SAMLKeyInfo getCredentialFromKeyInfo(
Element keyInfoElement,
RequestData data,
WSDocInfo docInfo,
boolean bspCompliant
) throws WSSecurityException {
//
// First try to find an EncryptedKey, BinarySecret or a SecurityTokenReference via DOM
//
Node node = keyInfoElement.getFirstChild();
while (node != null) {
if (Node.ELEMENT_NODE == node.getNodeType()) {
QName el = new QName(node.getNamespaceURI(), node.getLocalName());
if (el.equals(WSSecurityEngine.ENCRYPTED_KEY)) {
EncryptedKeyProcessor proc = new EncryptedKeyProcessor();
List result =
proc.handleToken((Element)node, data, docInfo, data.getSamlAlgorithmSuite());
byte[] secret =
(byte[])result.get(0).get(
WSSecurityEngineResult.TAG_SECRET
);
return new SAMLKeyInfo(secret);
} else if (el.equals(BINARY_SECRET) || el.equals(BINARY_SECRET_05_12)) {
Text txt = (Text)node.getFirstChild();
return new SAMLKeyInfo(Base64.decode(txt.getData()));
} else if (SecurityTokenReference.STR_QNAME.equals(el)) {
STRParser strParser = new SignatureSTRParser();
strParser.parseSecurityTokenReference(
(Element)node, data, docInfo, new HashMap()
);
SAMLKeyInfo samlKeyInfo = new SAMLKeyInfo(strParser.getCertificates());
samlKeyInfo.setPublicKey(strParser.getPublicKey());
samlKeyInfo.setSecret(strParser.getSecretKey());
Principal principal = strParser.getPrincipal();
// Check for compliance against the defined AlgorithmSuite
AlgorithmSuite algorithmSuite = data.getSamlAlgorithmSuite();
if (algorithmSuite != null && principal instanceof WSDerivedKeyTokenPrincipal) {
AlgorithmSuiteValidator algorithmSuiteValidator = new
AlgorithmSuiteValidator(algorithmSuite);
algorithmSuiteValidator.checkDerivedKeyAlgorithm(
((WSDerivedKeyTokenPrincipal)principal).getAlgorithm()
);
algorithmSuiteValidator.checkSignatureDerivedKeyLength(
((WSDerivedKeyTokenPrincipal)principal).getLength()
);
}
return samlKeyInfo;
}
}
node = node.getNextSibling();
}
//
// Next marshal the KeyInfo DOM element into a javax KeyInfo object and get the
// (public key) credential
//
X509Certificate[] certs = null;
KeyInfoFactory keyInfoFactory = null;
try {
keyInfoFactory = KeyInfoFactory.getInstance("DOM", "ApacheXMLDSig");
} catch (NoSuchProviderException ex) {
keyInfoFactory = KeyInfoFactory.getInstance("DOM");
}
XMLStructure keyInfoStructure = new DOMStructure(keyInfoElement);
try {
javax.xml.crypto.dsig.keyinfo.KeyInfo keyInfo =
keyInfoFactory.unmarshalKeyInfo(keyInfoStructure);
List list = keyInfo.getContent();
for (int i = 0; i < list.size(); i++) {
XMLStructure xmlStructure = (XMLStructure) list.get(i);
if (xmlStructure instanceof KeyValue) {
PublicKey publicKey = ((KeyValue)xmlStructure).getPublicKey();
return new SAMLKeyInfo(publicKey);
} else if (xmlStructure instanceof X509Data) {
List x509Data = ((X509Data)xmlStructure).getContent();
for (int j = 0; j < x509Data.size(); j++) {
Object x509obj = x509Data.get(j);
if (x509obj instanceof X509Certificate) {
certs = new X509Certificate[1];
certs[0] = (X509Certificate)x509obj;
return new SAMLKeyInfo(certs);
} else if (x509obj instanceof X509IssuerSerial) {
if (data.getSigCrypto() == null) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "noSigCryptoFile"
);
}
CryptoType cryptoType = new CryptoType(CryptoType.TYPE.ISSUER_SERIAL);
cryptoType.setIssuerSerial(
((X509IssuerSerial)x509obj).getIssuerName(),
((X509IssuerSerial)x509obj).getSerialNumber()
);
certs = data.getSigCrypto().getX509Certificates(cryptoType);
if (certs == null || certs.length < 1) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLsecurity",
new Object[]{"cannot get certificate or key"}
);
}
return new SAMLKeyInfo(certs);
}
}
}
}
} catch (Exception ex) {
throw new WSSecurityException(
WSSecurityException.FAILURE, "invalidSAMLsecurity",
new Object[]{"cannot get certificate or key"}, ex
);
}
return null;
}
}