content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed 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 com.alibaba.nacos.common.tls;
  
  import javax.net.ssl.SSLContext;
  import java.security.KeyManagementException;
  import java.security.NoSuchAlgorithmException;
  
  /**
   * Utils for build {@link SSLContext}.
   *
   * <p>Currently only supports client-side
   *
   * <h3>Making your client support TLS without authentication</h3>
   * <pre>
   * System.setProperty({@link TlsSystemConfig#TLS_ENABLE}, "true");
   * </pre>
   *
   * <h3>Making your client support TLS one-way authentication</h3>
   *
   * <pre>
   * System.setProperty({@link TlsSystemConfig#TLS_ENABLE}, "true");
   * System.setProperty({@link TlsSystemConfig#CLIENT_AUTH}, "true");
   * System.setProperty({@link TlsSystemConfig#CLIENT_TRUST_CERT}, "trustCert");
   * </pre>
   *
   * @author wangwei
   * @date 2020/8/19 2:59 PM
   */
  public final class TlsHelper {
      
      /**
       * Returns a {@link org.apache.http.ssl.SSLContexts}.
       *
       * <p>For example</p>
       * <code>HttpsURLConnection.setDefaultSSLSocketFactory(TlsHelper.buildSslContext(true).getSocketFactory());</code>
       *
       * @param forClient whether for client
       * @return {@link SSLContext}
       * @throws NoSuchAlgorithmException Not support the specified algorithm
       * @throws KeyManagementException   KeyManagement exception
       */
      public static SSLContext buildSslContext(boolean forClient)
              throws NoSuchAlgorithmException, KeyManagementException {
          
          SSLContext sslcontext = SSLContext.getInstance("TLS");
          sslcontext.init(null, SelfTrustManager
                          .trustManager(TlsSystemConfig.tlsClientAuthServer, TlsSystemConfig.tlsClientTrustCertPath),
                  new java.security.SecureRandom());
          return sslcontext;
      }
  }
  