code: /**
   * 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.policyvalidators;
  
  import java.net.URI;
  import java.util.List;
  
  import org.w3c.dom.Element;
  
  import org.apache.cxf.helpers.DOMUtils;
  import org.apache.ws.security.saml.ext.AssertionWrapper;
  
  /**
   * Validate a WS-SecurityPolicy Claims policy for the 
   * "http://schemas.xmlsoap.org/ws/2005/05/identity" namespace.
   */
  public class DefaultClaimsPolicyValidator implements ClaimsPolicyValidator {
      
      private static final String DEFAULT_CLAIMS_NAMESPACE = 
          "http://schemas.xmlsoap.org/ws/2005/05/identity";
      
      /**
       * Validate a particular Claims policy against a received SAML Assertion. 
       * Return true if the policy is valid.
       */
      public boolean validatePolicy(
          Element claimsPolicy,
          AssertionWrapper assertion
      ) {
          if (claimsPolicy == null) {
              return false;
          }
          
          String dialect = claimsPolicy.getAttributeNS(null, "Dialect");
          if (!DEFAULT_CLAIMS_NAMESPACE.equals(dialect)) {
              return false;
          }
          
          Element claimType = DOMUtils.getFirstElement(claimsPolicy);
          while (claimType != null) {
              if ("ClaimType".equals(claimType.getLocalName())) {
                  String claimTypeUri = claimType.getAttributeNS(null, "Uri");
                  String claimTypeOptional = claimType.getAttributeNS(null, "Optional");
                  
                  if (("".equals(claimTypeOptional) || !Boolean.parseBoolean(claimTypeOptional))
                      && !findClaimInAssertion(assertion, URI.create(claimTypeUri))) {
                      return false;
                  }
              }
              
              claimType = DOMUtils.getNextElement(claimType);
          }
          
          return true;
      }
      
      /**
       * Return the dialect that this ClaimsPolicyValidator can parse
       */
      public String getDialect() {
          return DEFAULT_CLAIMS_NAMESPACE;
      }
      
      private boolean findClaimInAssertion(AssertionWrapper assertion, URI claimURI) {
          if (assertion.getSaml1() != null) {
              return findClaimInAssertion(assertion.getSaml1(), claimURI);
          } else if (assertion.getSaml2() != null) {
              return findClaimInAssertion(assertion.getSaml2(), claimURI);
          }
          return false;
      }
      
      private boolean findClaimInAssertion(org.opensaml.saml2.core.Assertion assertion, URI claimURI) {
          List<org.opensaml.saml2.core.AttributeStatement> attributeStatements = 
              assertion.getAttributeStatements();
          if (attributeStatements == null || attributeStatements.isEmpty()) {
              return false;
          }
          
          for (org.opensaml.saml2.core.AttributeStatement statement : attributeStatements) {
              
              List<org.opensaml.saml2.core.Attribute> attributes = statement.getAttributes();
              for (org.opensaml.saml2.core.Attribute attribute : attributes) {
                  
                  if (attribute.getName().equals(claimURI.toString())
                      && attribute.getAttributeValues() != null && !attribute.getAttributeValues().isEmpty()) {
                      return true;
                  }
              }
          }
          return false;
      }
      
      private boolean findClaimInAssertion(org.opensaml.saml1.core.Assertion assertion, URI claimURI) {
          List<org.opensaml.saml1.core.AttributeStatement> attributeStatements = 
              assertion.getAttributeStatements();
          if (attributeStatements == null || attributeStatements.isEmpty()) {
              return false;
          }
          
          for (org.opensaml.saml1.core.AttributeStatement statement : attributeStatements) {
              
              List<org.opensaml.saml1.core.Attribute> attributes = statement.getAttributes();
              for (org.opensaml.saml1.core.Attribute attribute : attributes) {
                  
                  URI attributeNamespace = URI.create(attribute.getAttributeNamespace());
                  String desiredRole = attributeNamespace.relativize(claimURI).toString();
                  if (attribute.getAttributeName().equals(desiredRole)
                      && attribute.getAttributeValues() != null && !attribute.getAttributeValues().isEmpty()) {
                      return true;
                  }
              }
          }
          return false;
      }
  }
  