/**
* 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.cxf.ws.security.wss4j;
import java.security.Principal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.security.auth.Subject;
import javax.security.auth.callback.CallbackHandler;
import javax.xml.namespace.QName;
import org.w3c.dom.Element;
import org.apache.cxf.binding.soap.SoapMessage;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.headers.Header;
import org.apache.cxf.helpers.CastUtils;
import org.apache.cxf.helpers.DOMUtils;
import org.apache.cxf.interceptor.Fault;
import org.apache.cxf.interceptor.security.DefaultSecurityContext;
import org.apache.cxf.message.MessageUtils;
import org.apache.cxf.security.SecurityContext;
import org.apache.cxf.ws.policy.AssertionInfo;
import org.apache.cxf.ws.policy.AssertionInfoMap;
import org.apache.cxf.ws.security.SecurityConstants;
import org.apache.wss4j.common.cache.ReplayCache;
import org.apache.wss4j.common.ext.WSPasswordCallback;
import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.common.principal.UsernameTokenPrincipal;
import org.apache.wss4j.common.principal.WSUsernameTokenPrincipalImpl;
import org.apache.wss4j.dom.WSConstants;
import org.apache.wss4j.dom.WSDocInfo;
import org.apache.wss4j.dom.WSSConfig;
import org.apache.wss4j.dom.WSSecurityEngineResult;
import org.apache.wss4j.dom.bsp.BSPEnforcer;
import org.apache.wss4j.dom.handler.RequestData;
import org.apache.wss4j.dom.handler.WSHandlerConstants;
import org.apache.wss4j.dom.handler.WSHandlerResult;
import org.apache.wss4j.dom.message.WSSecUsernameToken;
import org.apache.wss4j.dom.processor.UsernameTokenProcessor;
import org.apache.wss4j.dom.validate.Validator;
import org.apache.wss4j.policy.SP13Constants;
import org.apache.wss4j.policy.SPConstants;
import org.apache.wss4j.policy.model.AbstractSecurityAssertion;
import org.apache.wss4j.policy.model.SupportingTokens;
import org.apache.wss4j.policy.model.UsernameToken;
import org.apache.xml.security.exceptions.Base64DecodingException;
import org.apache.xml.security.utils.Base64;
/**
*
*/
public class UsernameTokenInterceptor extends AbstractTokenInterceptor {
public UsernameTokenInterceptor() {
super();
}
protected void processToken(SoapMessage message) {
Header h = findSecurityHeader(message, false);
if (h == null) {
return;
}
Element el = (Element)h.getObject();
Element child = DOMUtils.getFirstElement(el);
while (child != null) {
if (SPConstants.USERNAME_TOKEN.equals(child.getLocalName())
&& WSConstants.WSSE_NS.equals(child.getNamespaceURI())) {
try {
final UsernameTokenPrincipal princ = getPrincipal(child, message);
if (princ != null) {
List<WSSecurityEngineResult>v = new ArrayList<WSSecurityEngineResult>();
int action = WSConstants.UT;
if (princ.getPassword() == null) {
action = WSConstants.UT_NOPASSWORD;
}
v.add(0, new WSSecurityEngineResult(action, princ, null, null, null));
List<WSHandlerResult> results = CastUtils.cast((List<?>)message
.get(WSHandlerConstants.RECV_RESULTS));
if (results == null) {
results = new ArrayList<WSHandlerResult>();
message.put(WSHandlerConstants.RECV_RESULTS, results);
}
WSHandlerResult rResult = new WSHandlerResult(null, v);
results.add(0, rResult);
assertTokens(message, princ, false);
message.put(WSS4JInInterceptor.PRINCIPAL_RESULT, princ);
SecurityContext sc = message.get(SecurityContext.class);
if (sc == null || sc.getUserPrincipal() == null) {
String nonce = null;
if (princ.getNonce() != null) {
nonce = Base64.encode(princ.getNonce());
}
Subject subject = createSubject(princ.getName(), princ.getPassword(),
princ.isPasswordDigest(), nonce, princ.getCreatedTime());
message.put(SecurityContext.class,
createSecurityContext(princ, subject));
}
}
} catch (WSSecurityException ex) {
throw new Fault(ex);
} catch (Base64DecodingException ex) {
throw new Fault(ex);
}
}
child = DOMUtils.getNextElement(child);
}
}
protected UsernameTokenPrincipal getPrincipal(Element tokenElement, final SoapMessage message)
throws WSSecurityException, Base64DecodingException {
boolean bspCompliant = isWsiBSPCompliant(message);
boolean utWithCallbacks =
MessageUtils.getContextualBoolean(message, SecurityConstants.VALIDATE_TOKEN, true);
boolean allowNoPassword = isAllowNoPassword(message.get(AssertionInfoMap.class));
if (utWithCallbacks) {
UsernameTokenProcessor p = new UsernameTokenProcessor();
WSDocInfo wsDocInfo = new WSDocInfo(tokenElement.getOwnerDocument());
RequestData data = new RequestData() {
public CallbackHandler getCallbackHandler() {
return getCallback(message);
}
public Validator getValidator(QName qName) throws WSSecurityException {
Object validator =
message.getContextualProperty(SecurityConstants.USERNAME_TOKEN_VALIDATOR);
if (validator == null) {
return super.getValidator(qName);
}
return (Validator)validator;
}
};
// Configure replay caching
ReplayCache nonceCache =
WSS4JUtils.getReplayCache(
message, SecurityConstants.ENABLE_NONCE_CACHE, SecurityConstants.NONCE_CACHE_INSTANCE
);
data.setNonceReplayCache(nonceCache);
WSSConfig config = WSSConfig.getNewInstance();
config.setAllowUsernameTokenNoPassword(allowNoPassword);
data.setWssConfig(config);
if (!bspCompliant) {
data.setDisableBSPEnforcement(true);
}
List<WSSecurityEngineResult> results =
p.handleToken(tokenElement, data, wsDocInfo);
return (UsernameTokenPrincipal)results.get(0).get(WSSecurityEngineResult.TAG_PRINCIPAL);
} else {
UsernameTokenPrincipal principal = parseTokenAndCreatePrincipal(tokenElement, bspCompliant);
WSS4JTokenConverter.convertToken(message, principal);
return principal;
}
}
protected UsernameTokenPrincipal parseTokenAndCreatePrincipal(Element tokenElement, boolean bspCompliant)
throws WSSecurityException, Base64DecodingException {
BSPEnforcer bspEnforcer = new BSPEnforcer(!bspCompliant);
org.apache.wss4j.dom.message.token.UsernameToken ut =
new org.apache.wss4j.dom.message.token.UsernameToken(tokenElement, false, bspEnforcer);
WSUsernameTokenPrincipalImpl principal = new WSUsernameTokenPrincipalImpl(ut.getName(), ut.isHashed());
if (ut.getNonce() != null) {
principal.setNonce(Base64.decode(ut.getNonce()));
}
principal.setPassword(ut.getPassword());
principal.setCreatedTime(ut.getCreated());
principal.setPasswordType(ut.getPasswordType());
return principal;
}
protected boolean isWsiBSPCompliant(final SoapMessage message) {
String bspc = (String)message.getContextualProperty(SecurityConstants.IS_BSP_COMPLIANT);
// Default to WSI-BSP compliance enabled
return !("false".equals(bspc) || "0".equals(bspc));
}
private boolean isAllowNoPassword(AssertionInfoMap aim) throws WSSecurityException {
Collection<AssertionInfo> ais = getAllAssertionsByLocalname(aim, SPConstants.USERNAME_TOKEN);
if (!ais.isEmpty()) {
for (AssertionInfo ai : ais) {
UsernameToken policy = (UsernameToken)ai.getAssertion();
if (policy.getPasswordType() == UsernameToken.PasswordType.NoPassword) {
return true;
}
}
}
return false;
}
protected SecurityContext createSecurityContext(final Principal p, Subject subject) {
return new DefaultSecurityContext(p, subject);
}
/**
* Create a Subject representing a current user and its roles.
* This Subject is expected to contain at least one Principal representing a user
* and optionally followed by one or more principal Groups this user is a member of.
* @param name username
* @param password password
* @param isDigest true if a password digest is used
* @param nonce optional nonce
* @param created optional timestamp
* @return subject
* @throws SecurityException
*/
protected Subject createSubject(String name,
String password,
boolean isDigest,
String nonce,
String created) throws SecurityException {
return null;
}
protected UsernameToken assertTokens(SoapMessage message) {
AssertionInfoMap aim = message.get(AssertionInfoMap.class);
assertPolicy(aim, SPConstants.USERNAME_TOKEN10);
assertPolicy(aim, SPConstants.USERNAME_TOKEN11);
assertPolicy(aim, SPConstants.HASH_PASSWORD);
assertPolicy(aim, SPConstants.NO_PASSWORD);
assertPolicy(aim, SP13Constants.NONCE);
assertPolicy(aim, SP13Constants.CREATED);
return (UsernameToken)assertTokens(message, SPConstants.USERNAME_TOKEN, true);
}
private UsernameToken assertTokens(
SoapMessage message,
UsernameTokenPrincipal princ,
boolean signed
) {
AssertionInfoMap aim = message.get(AssertionInfoMap.class);
Collection<AssertionInfo> ais = getAllAssertionsByLocalname(aim, SPConstants.USERNAME_TOKEN);
UsernameToken tok = null;
for (AssertionInfo ai : ais) {
tok = (UsernameToken)ai.getAssertion();
ai.setAsserted(true);
if ((tok.getPasswordType() == UsernameToken.PasswordType.HashPassword)
&& (princ == null || !princ.isPasswordDigest())) {
ai.setNotAsserted("Password hashing policy not enforced");
} else {
assertPolicy(aim, SPConstants.HASH_PASSWORD);
}
if ((tok.getPasswordType() != UsernameToken.PasswordType.NoPassword)
&& isNonEndorsingSupportingToken(tok)
&& (princ == null || princ.getPassword() == null)) {
ai.setNotAsserted("Username Token No Password supplied");
} else {
assertPolicy(aim, SPConstants.NO_PASSWORD);
}
if (tok.isCreated() && princ.getCreatedTime() == null) {
ai.setNotAsserted("No Created Time");
} else {
assertPolicy(aim, SP13Constants.CREATED);
}
if (tok.isNonce() && princ.getNonce() == null) {
ai.setNotAsserted("No Nonce");
} else {
assertPolicy(aim, SP13Constants.NONCE);
}
}
assertPolicy(aim, SPConstants.USERNAME_TOKEN10);
assertPolicy(aim, SPConstants.USERNAME_TOKEN11);
assertPolicy(aim, SPConstants.SUPPORTING_TOKENS);
if (signed || isTLSInUse(message)) {
assertPolicy(aim, SPConstants.SIGNED_SUPPORTING_TOKENS);
}
return tok;
}
/**
* Return true if this UsernameToken policy is a (non-endorsing)SupportingToken. If this is
* true then the corresponding UsernameToken must have a password element.
*/
private boolean isNonEndorsingSupportingToken(
org.apache.wss4j.policy.model.UsernameToken usernameTokenPolicy
) {
AbstractSecurityAssertion supportingToken = usernameTokenPolicy.getParentAssertion();
if (supportingToken instanceof SupportingTokens
&& ((SupportingTokens)supportingToken).isEndorsing()) {
return false;
}
return true;
}
protected void addToken(SoapMessage message) {
UsernameToken tok = assertTokens(message);
Header h = findSecurityHeader(message, true);
WSSecUsernameToken utBuilder =
addUsernameToken(message, tok);
if (utBuilder == null) {
AssertionInfoMap aim = message.get(AssertionInfoMap.class);
Collection<AssertionInfo> ais =
getAllAssertionsByLocalname(aim, SPConstants.USERNAME_TOKEN);
for (AssertionInfo ai : ais) {
if (ai.isAsserted()) {
ai.setAsserted(false);
}
}
return;
}
Element el = (Element)h.getObject();
utBuilder.prepare(el.getOwnerDocument());
el.appendChild(utBuilder.getUsernameTokenElement());
}
protected WSSecUsernameToken addUsernameToken(SoapMessage message, UsernameToken token) {
String userName = (String)message.getContextualProperty(SecurityConstants.USERNAME);
WSSConfig wssConfig = (WSSConfig)message.getContextualProperty(WSSConfig.class.getName());
if (wssConfig == null) {
wssConfig = WSSConfig.getNewInstance();
}
if (!StringUtils.isEmpty(userName)) {
// If NoPassword property is set we don't need to set the password
if (token.getPasswordType() == UsernameToken.PasswordType.NoPassword) {
WSSecUsernameToken utBuilder = new WSSecUsernameToken(wssConfig);
utBuilder.setUserInfo(userName, null);
utBuilder.setPasswordType(null);
return utBuilder;
}
String password = (String)message.getContextualProperty(SecurityConstants.PASSWORD);
if (StringUtils.isEmpty(password)) {
password = getPassword(userName, token, WSPasswordCallback.Usage.USERNAME_TOKEN, message);
}
if (!StringUtils.isEmpty(password)) {
//If the password is available then build the token
WSSecUsernameToken utBuilder = new WSSecUsernameToken(wssConfig);
if (token.getPasswordType() == UsernameToken.PasswordType.HashPassword) {
utBuilder.setPasswordType(WSConstants.PASSWORD_DIGEST);
} else {
utBuilder.setPasswordType(WSConstants.PASSWORD_TEXT);
}
utBuilder.setUserInfo(userName, password);
return utBuilder;
} else {
policyNotAsserted(token, "No username available", message);
}
} else {
policyNotAsserted(token, "No username available", message);
}
return null;
}
}