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.util.ArrayList;
  import java.util.Collection;
  import java.util.List;
  
  import org.w3c.dom.Element;
  
  import org.apache.cxf.message.Message;
  import org.apache.cxf.ws.policy.AssertionInfo;
  import org.apache.cxf.ws.policy.AssertionInfoMap;
  import org.apache.cxf.ws.security.policy.SP12Constants;
  import org.apache.cxf.ws.security.policy.SPConstants;
  import org.apache.cxf.ws.security.policy.model.X509Token;
  import org.apache.ws.security.WSConstants;
  import org.apache.ws.security.WSSecurityEngineResult;
  import org.apache.ws.security.message.token.BinarySecurity;
  import org.apache.ws.security.util.WSSecurityUtil;
  
  /**
   * Validate an X509 Token policy.
   */
  public class X509TokenPolicyValidator extends AbstractTokenPolicyValidator implements TokenPolicyValidator {
      
      private static final String X509_V3_VALUETYPE = WSConstants.X509TOKEN_NS + "#X509v3";
      private static final String PKI_VALUETYPE = WSConstants.X509TOKEN_NS + "#X509PKIPathv1";
      
      public boolean validatePolicy(
          AssertionInfoMap aim,
          Message message,
          Element soapBody,
          List<WSSecurityEngineResult> results,
          List<WSSecurityEngineResult> signedResults
      ) {
          Collection<AssertionInfo> ais = aim.get(SP12Constants.X509_TOKEN);
          if (ais == null || ais.isEmpty()) {
              return true;
          }
          
          List<WSSecurityEngineResult> bstResults = new ArrayList<WSSecurityEngineResult>();
          WSSecurityUtil.fetchAllActionResults(results, WSConstants.BST, bstResults);
          
          for (AssertionInfo ai : ais) {
              X509Token x509TokenPolicy = (X509Token)ai.getAssertion();
              ai.setAsserted(true);
  
              if (!isTokenRequired(x509TokenPolicy, message)) {
                  continue;
              }
  
              if (bstResults.isEmpty()) {
                  ai.setNotAsserted(
                      "The received token does not match the token inclusion requirement"
                  );
                  continue;
              }
  
              if (!checkTokenType(x509TokenPolicy.getTokenVersionAndType(), bstResults)) {
                  ai.setNotAsserted("An incorrect X.509 Token Type is detected");
                  continue;
              }
          }
          return true;
      }
      
      /**
       * Check that at least one received token matches the token type.
       */
      private boolean checkTokenType(
          String requiredVersionAndType,
          List<WSSecurityEngineResult> bstResults
      ) {
          if (bstResults.isEmpty()) {
              return false;
          }
  
          String requiredType = X509_V3_VALUETYPE;
          if (SPConstants.WSS_X509_PKI_PATH_V1_TOKEN10.equals(requiredType)
              || SPConstants.WSS_X509_PKI_PATH_V1_TOKEN11.equals(requiredType)) {
              requiredType = PKI_VALUETYPE;
          }
  
          for (WSSecurityEngineResult result : bstResults) {
              BinarySecurity binarySecurityToken = 
                  (BinarySecurity)result.get(WSSecurityEngineResult.TAG_BINARY_SECURITY_TOKEN);
              if (binarySecurityToken != null) {
                  String type = binarySecurityToken.getValueType();
                  if (requiredType.equals(type)) {
                      return true;
                  }
              }
          }
          return false;
      }
  }
  