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.security.cert.X509Certificate;
  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.model.AsymmetricBinding;
  import org.apache.cxf.ws.security.policy.model.Token;
  import org.apache.cxf.ws.security.policy.model.TokenWrapper;
  import org.apache.cxf.ws.security.policy.model.X509Token;
  import org.apache.ws.security.WSConstants;
  import org.apache.ws.security.WSSecurityEngineResult;
  
  /**
   * Validate an AsymmetricBinding policy.
   */
  public class AsymmetricBindingPolicyValidator extends AbstractBindingPolicyValidator {
      
      public boolean validatePolicy(
          AssertionInfoMap aim,
          Message message,
          Element soapBody,
          List<WSSecurityEngineResult> results,
          List<WSSecurityEngineResult> signedResults,
          List<WSSecurityEngineResult> encryptedResults
      ) {
          Collection<AssertionInfo> ais = aim.get(SP12Constants.ASYMMETRIC_BINDING);
          if (ais == null || ais.isEmpty()) {                       
              return true;
          }
          
          boolean hasDerivedKeys = false;
          for (WSSecurityEngineResult result : results) {
              Integer actInt = (Integer)result.get(WSSecurityEngineResult.TAG_ACTION);
              if (actInt.intValue() == WSConstants.DKT) {
                  hasDerivedKeys = true;
                  break;
              }
          }
          
          for (AssertionInfo ai : ais) {
              AsymmetricBinding binding = (AsymmetricBinding)ai.getAssertion();
              ai.setAsserted(true);
  
              // Check the protection order
              if (!checkProtectionOrder(binding, ai, results)) {
                  continue;
              }
              
              // Check various properties of the binding
              if (!checkProperties(binding, ai, aim, results, signedResults, message)) {
                  continue;
              }
              
              // Check various tokens of the binding
              if (!checkTokens(binding, ai, aim, hasDerivedKeys, signedResults, encryptedResults)) {
                  continue;
              }
          }
          
          return true;
      }
      
      
      /**
       * Check various tokens of the binding
       */
      private boolean checkTokens(
          AsymmetricBinding binding, 
          AssertionInfo ai,
          AssertionInfoMap aim,
          boolean hasDerivedKeys,
          List<WSSecurityEngineResult> signedResults,
          List<WSSecurityEngineResult> encryptedResults
      ) {
          boolean result = true;
          if (binding.getInitiatorToken() != null) {
              result &= checkInitiatorTokens(binding.getInitiatorToken(), binding, ai, aim, hasDerivedKeys,
                                          signedResults, encryptedResults);            
          }
          if (binding.getInitiatorSignatureToken() != null) {
              result &= checkInitiatorTokens(binding.getInitiatorSignatureToken(), binding, ai, aim,
                                          hasDerivedKeys, signedResults, encryptedResults);
          }
          if (binding.getInitiatorEncryptionToken() != null) {
              result &= checkInitiatorTokens(binding.getInitiatorEncryptionToken(), binding, ai, aim,
                                          hasDerivedKeys, signedResults, encryptedResults);
          }
          if (binding.getRecipientToken() != null) {
              result &= checkRecipientTokens(binding.getRecipientToken(), binding, ai, aim, hasDerivedKeys,
                                          signedResults, encryptedResults);
          }
          if (binding.getRecipientSignatureToken() != null) {
              result &= checkRecipientTokens(binding.getRecipientSignatureToken(), binding, ai, aim,
                                          hasDerivedKeys, signedResults, encryptedResults);
          }
          if (binding.getRecipientEncryptionToken() != null) {
              result &= checkRecipientTokens(binding.getRecipientEncryptionToken(), binding, ai, aim,
                                          hasDerivedKeys, signedResults, encryptedResults);
          }
          
          return result;
      }
      
      private boolean checkInitiatorTokens(
          TokenWrapper wrapper, 
          AsymmetricBinding binding, 
          AssertionInfo ai,
          AssertionInfoMap aim, 
          boolean hasDerivedKeys,
          List<WSSecurityEngineResult> signedResults,
          List<WSSecurityEngineResult> encryptedResults) {
  
          Token token = wrapper.getToken();
          if (token instanceof X509Token) {
              boolean foundCert = false;
              for (WSSecurityEngineResult result : signedResults) {
                  X509Certificate cert = (X509Certificate)result
                      .get(WSSecurityEngineResult.TAG_X509_CERTIFICATE);
                  if (cert != null) {
                      foundCert = true;
                      break;
                  }
              }
              if (!foundCert && !signedResults.isEmpty()) {
                  String error = "An X.509 certificate was not used for the " + wrapper.getName();
                  notAssertPolicy(aim, wrapper.getName(), error);
                  ai.setNotAsserted(error);
                  return false;
              }
          }
          assertPolicy(aim, wrapper);
          if (!checkDerivedKeys(wrapper, hasDerivedKeys, signedResults, encryptedResults)) {
              ai.setNotAsserted("Message fails the DerivedKeys requirement");
              return false;
          }
  
          return true;
      }
  
      private boolean checkRecipientTokens(
          TokenWrapper wrapper, 
          AsymmetricBinding binding, 
          AssertionInfo ai,
          AssertionInfoMap aim, 
          boolean hasDerivedKeys,
          List<WSSecurityEngineResult> signedResults,
          List<WSSecurityEngineResult> encryptedResults) {
  
          assertPolicy(aim, wrapper);
          if (!checkDerivedKeys(wrapper, hasDerivedKeys, signedResults, encryptedResults)) {
              ai.setNotAsserted("Message fails the DerivedKeys requirement");
              return false;
          }
  
          return true;
      }
      
  }
  