/**
 * 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.systest.sts.intermediary_transformation;

import java.util.List;

import org.apache.wss4j.common.ext.WSSecurityException;
import org.apache.wss4j.common.saml.SamlAssertionWrapper;
import org.apache.wss4j.dom.handler.RequestData;
import org.apache.wss4j.dom.validate.Credential;
import org.apache.wss4j.dom.validate.SamlAssertionValidator;
import org.opensaml.saml.saml2.core.Assertion;
import org.opensaml.saml.saml2.core.AttributeStatement;
import org.opensaml.saml.saml2.core.NameID;
import org.opensaml.saml.saml2.core.Subject;

/**
 * This class validates a SAML 2 Assertion and checks that it has a Subject with a value 
 * containing "alice" or bob
 */
public class OnBehalfOfValidator extends SamlAssertionValidator {
    
    @Override
    public Credential validate(Credential credential, RequestData data) throws WSSecurityException {
        Credential validatedCredential = super.validate(credential, data);
        SamlAssertionWrapper assertion = validatedCredential.getSamlAssertion();
        
        Assertion saml2Assertion = assertion.getSaml2();
        if (saml2Assertion == null) {
            throw new WSSecurityException(WSSecurityException.ErrorCode.FAILURE, "invalidSAMLsecurity");
        }
        
        List<AttributeStatement> attributeStatements = saml2Assertion.getAttributeStatements();
        if (attributeStatements == null || attributeStatements.isEmpty()) {
            throw new WSSecurityException(WSSecurityException.ErrorCode.FAILURE, "invalidSAMLsecurity");
        }
        
        Subject subject = saml2Assertion.getSubject();
        NameID nameID = subject.getNameID();
        String subjectName = nameID.getValue();
        if ("alice".equals(subjectName) || "bob".equals(subjectName)) {
            return validatedCredential;
        }
        
        throw new WSSecurityException(WSSecurityException.ErrorCode.FAILURE, "invalidSAMLsecurity");
    }

}
