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1   /*
2    * Copyright 2021 The Netty Project
3    *
4    * The Netty Project licenses this file to you under the Apache License,
5    * version 2.0 (the "License"); you may not use this file except in compliance
6    * with the License. You may obtain a copy of the License at:
7    *
8    *   https://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13   * License for the specific language governing permissions and limitations
14   * under the License.
15   */
16  package io.netty.handler.ssl;
17  
18  import javax.net.ssl.SSLEngine;
19  
20  /**
21   * Contains methods that can be used to detect if BouncyCastle is usable.
22   */
23  final class BouncyCastle {
24  
25      private static final boolean BOUNCY_CASTLE_ON_CLASSPATH;
26  
27      static {
28          boolean bcOnClasspath = false;
29          try {
30              Class.forName("org.bouncycastle.jsse.provider.BouncyCastleJsseProvider");
31              bcOnClasspath = true;
32          } catch (Throwable ignore) {
33              // ignore
34          }
35          BOUNCY_CASTLE_ON_CLASSPATH = bcOnClasspath;
36      }
37  
38      /**
39       * Indicates whether or not BouncyCastle is available on the current system.
40       */
41      static boolean isAvailable() {
42          return BOUNCY_CASTLE_ON_CLASSPATH;
43      }
44  
45      /**
46       * Indicates whether or not BouncyCastle is the underlying SSLEngine.
47       */
48      static boolean isInUse(SSLEngine engine) {
49          return engine.getClass().getPackage().getName().startsWith("org.bouncycastle.jsse.provider");
50      }
51  
52      private BouncyCastle() {
53      }
54  }