/**
* 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.rs.security.oauth2.auth.saml;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.core.Form;
import javax.ws.rs.core.MultivaluedMap;
import org.w3c.dom.Element;
import org.apache.cxf.common.util.Base64Exception;
import org.apache.cxf.jaxrs.provider.FormEncodingProvider;
import org.apache.cxf.jaxrs.utils.ExceptionUtils;
import org.apache.cxf.jaxrs.utils.FormUtils;
import org.apache.cxf.jaxrs.utils.HttpUtils;
import org.apache.cxf.jaxrs.utils.JAXRSUtils;
import org.apache.cxf.message.Message;
import org.apache.cxf.rs.security.oauth2.saml.Constants;
import org.apache.cxf.rs.security.oauth2.saml.SamlOAuthValidator;
import org.apache.cxf.rs.security.oauth2.utils.Base64UrlUtility;
import org.apache.cxf.rs.security.oauth2.utils.OAuthConstants;
import org.apache.cxf.rs.security.saml.AbstractSamlInHandler;
import org.apache.cxf.rs.security.saml.SAMLUtils;
import org.apache.cxf.rs.security.saml.assertion.Subject;
import org.apache.wss4j.common.saml.SamlAssertionWrapper;
public class Saml2BearerAuthHandler extends AbstractSamlInHandler {
private FormEncodingProvider<Form> provider = new FormEncodingProvider<Form>(true);
private SamlOAuthValidator samlOAuthValidator = new SamlOAuthValidator();
public Saml2BearerAuthHandler() {
}
public void setSamlOAuthValidator(SamlOAuthValidator validator) {
samlOAuthValidator = validator;
}
public void filter(ContainerRequestContext context) {
Message message = JAXRSUtils.getCurrentMessage();
Form form = readFormData(message);
MultivaluedMap<String, String> formData = form.asMap();
String assertionType = formData.getFirst(Constants.CLIENT_AUTH_ASSERTION_TYPE);
String decodedAssertionType = assertionType != null ? HttpUtils.urlDecode(assertionType) : null;
if (decodedAssertionType == null || !Constants.CLIENT_AUTH_SAML2_BEARER.equals(decodedAssertionType)) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
String assertion = formData.getFirst(Constants.CLIENT_AUTH_ASSERTION_PARAM);
Element token = readToken(message, assertion);
String clientId = formData.getFirst(OAuthConstants.CLIENT_ID);
validateToken(message, token, clientId);
formData.remove(OAuthConstants.CLIENT_ID);
formData.remove(Constants.CLIENT_AUTH_ASSERTION_PARAM);
formData.remove(Constants.CLIENT_AUTH_ASSERTION_TYPE);
// restore input stream
try {
FormUtils.restoreForm(provider, form, message);
} catch (Exception ex) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
}
private Form readFormData(Message message) {
try {
return FormUtils.readForm(provider, message);
} catch (Exception ex) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
}
protected Element readToken(Message message, String assertion) {
if (assertion == null) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
try {
byte[] deflatedToken = Base64UrlUtility.decode(assertion);
InputStream is = new ByteArrayInputStream(deflatedToken);
return readToken(message, is);
} catch (Base64Exception ex) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
}
protected void validateToken(Message message, Element element, String clientId) {
SamlAssertionWrapper wrapper = toWrapper(element);
// The common SAML assertion validation:
// signature, subject confirmation, etc
super.validateToken(message, wrapper);
// This is specific to OAuth2 path
// Introduce SAMLOAuth2Validator to be reused between auth and grant handlers
Subject subject = SAMLUtils.getSubject(message, wrapper);
if (subject.getName() == null) {
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
if (clientId != null && !clientId.equals(subject.getName())) {
//TODO: Attempt to map client_id to subject.getName()
throw ExceptionUtils.toNotAuthorizedException(null, null);
}
samlOAuthValidator.validate(message, wrapper);
message.put(OAuthConstants.CLIENT_ID, subject.getName());
}
}