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   /*
    * Copyright 2014 The Netty Project
    *
    * The Netty Project 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:
    *
    *   https://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 io.netty.handler.ssl.util;
  
  import io.netty.util.internal.EmptyArrays;
  import io.netty.util.internal.logging.InternalLogger;
  import io.netty.util.internal.logging.InternalLoggerFactory;
  
  import javax.net.ssl.ManagerFactoryParameters;
  import javax.net.ssl.TrustManager;
  import javax.net.ssl.TrustManagerFactory;
  import javax.net.ssl.X509TrustManager;
  import java.security.KeyStore;
  import java.security.cert.X509Certificate;
  
  /**
   * An insecure {@link TrustManagerFactory} that trusts all X.509 certificates without any verification.
   * <p>
   * <strong>NOTE:</strong>
   * Never use this {@link TrustManagerFactory} in production.
   * It is purely for testing purposes, and thus it is very insecure.
   * </p>
   */
  public final class InsecureTrustManagerFactory extends SimpleTrustManagerFactory {
  
      private static final InternalLogger logger = InternalLoggerFactory.getInstance(InsecureTrustManagerFactory.class);
  
      public static final TrustManagerFactory INSTANCE = new InsecureTrustManagerFactory();
  
      private static final TrustManager tm = new X509TrustManager() {
          @Override
          public void checkClientTrusted(X509Certificate[] chain, String s) {
              if (logger.isDebugEnabled()) {
                  logger.debug("Accepting a client certificate: " + chain[0].getSubjectDN());
              }
          }
  
          @Override
          public void checkServerTrusted(X509Certificate[] chain, String s) {
              if (logger.isDebugEnabled()) {
                  logger.debug("Accepting a server certificate: " + chain[0].getSubjectDN());
              }
          }
  
          @Override
          public X509Certificate[] getAcceptedIssuers() {
              return EmptyArrays.EMPTY_X509_CERTIFICATES;
          }
      };
  
      private InsecureTrustManagerFactory() { }
  
      @Override
      protected void engineInit(KeyStore keyStore) throws Exception { }
  
      @Override
      protected void engineInit(ManagerFactoryParameters managerFactoryParameters) throws Exception { }
  
      @Override
      protected TrustManager[] engineGetTrustManagers() {
          return new TrustManager[] { tm };
      }
  }