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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.
/*
* Copyright 2003-2005 The Apache Software Foundation.
*
* Licensed 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;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.ws.security.components.crypto.Crypto;
import org.apache.ws.security.conversation.ConversationConstants;
import org.apache.ws.security.message.token.UsernameToken;
import org.apache.ws.security.processor.Processor;
import org.apache.ws.security.util.WSSecurityUtil;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.security.auth.callback.CallbackHandler;
import javax.xml.namespace.QName;
import java.util.Vector;
/**
* WS-Security Engine.
*
*
* @author Davanum Srinivas ([email protected]).
* @author Werner Dittmann ([email protected]).
*/
public class WSSecurityEngine {
public static final String VALUE_TYPE = "ValueType";
private static Log log = LogFactory.getLog(WSSecurityEngine.class.getName());
private static Log tlog =
LogFactory.getLog("org.apache.ws.security.TIME");
private static WSSecurityEngine engine = null;
/**
* The WSSConfig instance used by this SecurityEngine to
* find Processors for processing security headers
*/
private WSSConfig wssConfig = null;
private boolean doDebug = false;
/**
* wsse:BinarySecurityToken as defined by WS Security specification
*/
public static final QName binaryToken = new QName(WSConstants.WSSE_NS, WSConstants.BINARY_TOKEN_LN);
/**
* wsse:UsernameToken as defined by WS Security specification
*/
public static final QName usernameToken = new QName(WSConstants.WSSE_NS, WSConstants.USERNAME_TOKEN_LN);
/**
* wsu:Timestamp as defined by OASIS WS Security specification,
*/
public static final QName timeStamp = new QName(WSConstants.WSU_NS, WSConstants.TIMESTAMP_TOKEN_LN);
/**
* wsse11:signatureConfirmation as defined by OASIS WS Security specification,
*/
public static final QName signatureConfirmation = new QName(WSConstants.WSSE11_NS, WSConstants.SIGNATURE_CONFIRMATION_LN);
/**
* ds:Signature as defined by XML Signature specification,
* enhanced by WS Security specification
*/
public static final QName SIGNATURE = new QName(WSConstants.SIG_NS, WSConstants.SIG_LN);
/**
* xenc:EncryptedKey as defined by XML Encryption specification,
* enhanced by WS Security specification
*/
public static final QName ENCRYPTED_KEY = new QName(WSConstants.ENC_NS, WSConstants.ENC_KEY_LN);
/**
* xenc:EncryptedData as defined by XML Encryption specification,
* enhanced by WS Security specification
*/
public static final QName ENCRYPTED_DATA = new QName(WSConstants.ENC_NS, WSConstants.ENC_DATA_LN);
/**
* xenc:ReferenceList as defined by XML Encryption specification,
*/
public static final QName REFERENCE_LIST = new QName(WSConstants.ENC_NS, WSConstants.REF_LIST_LN);
/**
* saml:Assertion as defined by SAML specification
*/
public static final QName SAML_TOKEN = new QName(WSConstants.SAML_NS, WSConstants.ASSERTION_LN);
/**
* wsc:DerivedKeyToken as defined by WS-SecureConversation specification
*/
public static final QName DERIVED_KEY_TOKEN_05_02 = new QName(ConversationConstants.WSC_NS_05_02, ConversationConstants.DERIVED_KEY_TOKEN_LN);
/**
* wsc:SecurityContextToken as defined by WS-SecureConversation specification
*/
public static final QName SECURITY_CONTEXT_TOKEN_05_02 = new QName(ConversationConstants.WSC_NS_05_02, ConversationConstants.SECURITY_CONTEXT_TOKEN_LN);
/**
* wsc:DerivedKeyToken as defined by WS-SecureConversation specification in WS-SX
*/
public static final QName DERIVED_KEY_TOKEN_05_12 = new QName(ConversationConstants.WSC_NS_05_12, ConversationConstants.DERIVED_KEY_TOKEN_LN);
/**
* wsc:SecurityContextToken as defined by WS-SecureConversation specification in WS-SX
*/
public static final QName SECURITY_CONTEXT_TOKEN_05_12 = new QName(ConversationConstants.WSC_NS_05_12, ConversationConstants.SECURITY_CONTEXT_TOKEN_LN);
public WSSecurityEngine() {
}
/**
* Get a singleton instance of security engine.
*
*
* @return ws-security engine.
*/
public synchronized static WSSecurityEngine getInstance() {
if (engine == null) {
engine = new WSSecurityEngine();
}
return engine;
}
/**
* @return the WSSConfig object set on this instance, or
* the statically defined one, if the instance-level
* config object is null.
*/
public final WSSConfig
getWssConfig() {
return (wssConfig == null) ? WSSConfig.getDefaultWSConfig() : wssConfig;
}
/**
* @param the WSSConfig instance for this WSSecurityEngine to use
*
* @return the WSSConfig instance previously set on this
* WSSecurityEngine instance
*/
public final WSSConfig
setWssConfig(WSSConfig cfg) {
WSSConfig ret = wssConfig;
wssConfig = cfg;
return ret;
}
/**
* Process the security header given the soap envelope as W3C document.
*
* This is the main entry point to verify or decrypt a SOAP enevelope.
* First check if a wsse:Security is availabe with the
* defined actor.
*
* @param doc the SOAP envelope as {@link Document}
* @param actor the engine works on behalf of this actor. Refer
* to the SOAP specification about actor or role
*
* @param cb a callback hander to the caller to resolve passwords during
* encryption and {@link UsernameToken} handling
* @param crypto the object that implements the access to the keystore and the
* handling of certificates.
* @return a result vector
* @throws WSSecurityException
* @see WSSecurityEngine#processSecurityHeader(Element securityHeader, CallbackHandler cb,Crypto sigCrypto, Crypto decCrypto)
*/
public Vector processSecurityHeader(Document doc,
String actor,
CallbackHandler cb,
Crypto crypto)
throws WSSecurityException {
return processSecurityHeader(doc, actor, cb, crypto, crypto);
}
/**
* Process the security header given the soap envelope as W3C document.
*
* This is the main entry point to verify or decrypt a SOAP enevelope.
* First check if a wsse:Security is availabe with the
* defined actor.
*
* @param doc the SOAP envelope as {@link Document}
* @param actor the engine works on behalf of this actor. Refer
* to the SOAP specification about actor or role
*
* @param cb a callback hander to the caller to resolve passwords during
* encryption and {@link UsernameToken} handling
* @param sigCrypto the object that implements the access to the keystore and the
* handling of certificates for Signature
* @param decCrypto the object that implements the access to the keystore and the
* handling of certificates for Decryption
* @return a result vector
* @throws WSSecurityException
* @see WSSecurityEngine#processSecurityHeader(Element securityHeader, CallbackHandler cb,Crypto sigCrypto, Crypto decCrypto)
*/
public Vector processSecurityHeader(Document doc,
String actor,
CallbackHandler cb,
Crypto sigCrypto,
Crypto decCrypto)
throws WSSecurityException {
doDebug = log.isDebugEnabled();
if (doDebug) {
log.debug("enter processSecurityHeader()");
}
if (actor == null) {
actor = "";
}
Vector wsResult = null;
SOAPConstants sc = WSSecurityUtil.getSOAPConstants(doc.getDocumentElement());
Element elem = WSSecurityUtil.getSecurityHeader(doc, actor, sc);
if (elem != null) {
if (doDebug) {
log.debug("Processing WS-Security header for '" + actor
+ "' actor.");
}
wsResult = processSecurityHeader(elem, cb, sigCrypto, decCrypto);
}
return wsResult;
}
/**
* Process the security header given the wsse:Security DOM
* Element.
*
* This function loops over all direct child elements of the
* wsse:Security header. If it finds a knwon element, it
* transfers control to the appropriate handling function. The method
* processes the known child elements in the same order as they appear in
* the wsse:Security element. This is in accordance to the WS
* Security specification.
*
* Currently the functions can handle the following child elements:
*
*
* - {@link #SIGNATURE
ds:Signature}
* - {@link #ENCRYPTED_KEY
xenc:EncryptedKey}
* - {@link #REFERENCE_LIST
xenc:ReferenceList}
* - {@link #usernameToken
wsse:UsernameToken}
* - {@link #timeStamp
wsu:Timestamp}
*
*
* Note that additional child elements can be processed if appropriate
* Processors have been registered with the WSSCondig instance set
* on this class.
*
* @param securityHeader the wsse:Security header element
* @param cb a callback hander to the caller to resolve passwords during
* encryption and {@link UsernameToken}handling
* @param sigCrypto the object that implements the access to the keystore and the
* handling of certificates used for Signature
* @param decCrypto the object that implements the access to the keystore and the
* handling of certificates used for Decryption
* @return a Vector of {@link WSSecurityEngineResult}. Each element in the
* the Vector represents the result of a security action. The elements
* are ordered according to the sequence of the security actions in the
* wsse:Signature header. The Vector maybe empty if no security processing
* was performed.
* @throws WSSecurityException
*/
protected Vector processSecurityHeader(Element securityHeader,
CallbackHandler cb,
Crypto sigCrypto,
Crypto decCrypto) throws WSSecurityException {
long t0 = 0, t1 = 0, t2 = 0;
if (tlog.isDebugEnabled()) {
t0 = System.currentTimeMillis();
}
/*
* Gather some info about the document to process and store
* it for retrival. Store the implemenation of signature crypto
* (no need for encryption --- yet)
*/
WSDocInfo wsDocInfo = new WSDocInfo(securityHeader.getOwnerDocument().hashCode());
wsDocInfo.setCrypto(sigCrypto);
NodeList list = securityHeader.getChildNodes();
int len = list.getLength();
Node elem;
if (tlog.isDebugEnabled()) {
t1 = System.currentTimeMillis();
}
Vector returnResults = new Vector();
for (int i = 0; i < len; i++) {
elem = list.item(i);
if (elem.getNodeType() != Node.ELEMENT_NODE) {
continue;
}
QName el = new QName(elem.getNamespaceURI(), elem.getLocalName());
final WSSConfig cfg = getWssConfig();
Processor p = cfg.getProcessor(el);
/*
* Call the processor for this token. After the processor returns,
* store it for later retrival. The token processor may store some
* information about the processed token
*/
if (p != null) {
p.handleToken((Element) elem, sigCrypto, decCrypto, cb, wsDocInfo, returnResults, cfg);
wsDocInfo.setProcessor(p);
} else {
/*
* Add check for a BinarySecurityToken, add info to WSDocInfo. If BST is
* found before a Signature token this would speed up (at least a little
* bit) the processing of STR Transform.
*/
if (doDebug) {
log.debug("Unknown Element: " + elem.getLocalName() + " " + elem.getNamespaceURI());
}
}
}
if (tlog.isDebugEnabled()) {
t2 = System.currentTimeMillis();
tlog.debug("processHeader: total " + (t2 - t0) +
", prepare " + (t1 - t0) +
", handle " + (t2 - t1));
}
return returnResults;
}
}