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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.wss4j.policy.stax.assertionStates;

import org.apache.wss4j.policy.AssertionState;
import org.apache.wss4j.policy.SPConstants;
import org.apache.wss4j.common.WSSPolicyException;
import org.apache.wss4j.policy.model.AbstractSecurityAssertion;
import org.apache.xml.security.stax.securityEvent.AbstractSecuredElementSecurityEvent;
import org.apache.xml.security.stax.securityEvent.SecurityEvent;
import org.apache.xml.security.stax.securityEvent.SecurityEventConstants;
import org.apache.wss4j.policy.stax.Assertable;
import org.apache.wss4j.policy.stax.DummyPolicyAsserter;
import org.apache.wss4j.policy.stax.PolicyAsserter;
import org.apache.wss4j.stax.securityEvent.WSSecurityEventConstants;
import org.apache.wss4j.stax.utils.WSSUtils;

import javax.xml.namespace.QName;

import java.util.List;

/**
 * WSP1.3, 6.6 Entire Header and Body Signatures Property
 */
public class OnlySignEntireHeadersAndBodyAssertionState extends AssertionState implements Assertable {

    private String roleOrActor;
    private PolicyAsserter policyAsserter;

    public OnlySignEntireHeadersAndBodyAssertionState(AbstractSecurityAssertion assertion,
                                                      PolicyAsserter policyAsserter,
                                                      boolean asserted,
                                                      String roleOrActor) {
        super(assertion, asserted);
        this.roleOrActor = roleOrActor;

        this.policyAsserter = policyAsserter;
        if (this.policyAsserter == null) {
            this.policyAsserter = new DummyPolicyAsserter();
        }

        if (asserted) {
            String namespace = getAssertion().getName().getNamespaceURI();
            policyAsserter.assertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY));
        }
    }

    @Override
    public SecurityEventConstants.Event[] getSecurityEventType() {
        return new SecurityEventConstants.Event[]{
                WSSecurityEventConstants.SIGNED_PART,
                WSSecurityEventConstants.SignedElement
        };
    }

    @Override
    public boolean assertEvent(SecurityEvent securityEvent) throws WSSPolicyException {
        String namespace = getAssertion().getName().getNamespaceURI();

        AbstractSecuredElementSecurityEvent abstractSecuredElementSecurityEvent = (AbstractSecuredElementSecurityEvent) securityEvent;
        if (abstractSecuredElementSecurityEvent.isSigned() && !abstractSecuredElementSecurityEvent.isAttachment()) {
            List elementPath = abstractSecuredElementSecurityEvent.getElementPath();
            if (elementPath.size() == 4 && WSSUtils.isInSecurityHeader(abstractSecuredElementSecurityEvent.getXmlSecEvent(),
                                                                       elementPath, roleOrActor)) {
                setAsserted(true);
                policyAsserter.assertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY));
                return true;
            }
            if (elementPath.size() == 3 && WSSUtils.isInSOAPHeader(elementPath)) {
                setAsserted(true);
                policyAsserter.assertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY));
                return true;
            }
            if (elementPath.size() == 2 && WSSUtils.isInSOAPBody(elementPath)) {
                setAsserted(true);
                policyAsserter.assertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY));
                return true;
            }
            setAsserted(false);
            setErrorMessage("OnlySignEntireHeadersAndBody not fulfilled, offending element: " + WSSUtils.pathAsString(elementPath));
            policyAsserter.unassertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY),
                                          getErrorMessage());
            return false;
        }

        policyAsserter.assertPolicy(new QName(namespace, SPConstants.ONLY_SIGN_ENTIRE_HEADERS_AND_BODY));
        return true;
    }
}