1 /*
2 * Copyright 2017 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 io.netty.util.internal.PlatformDependent;
19
20 import java.lang.reflect.InvocationTargetException;
21 import java.lang.reflect.Method;
22 import javax.net.ssl.SSLEngine;
23
24 /**
25 * Contains methods that can be used to detect if conscrypt is usable.
26 */
27 final class Conscrypt {
28 // This class exists to avoid loading other conscrypt related classes using features only available in JDK8+,
29 // because we need to maintain JDK6+ runtime compatibility.
30 private static final Method IS_CONSCRYPT_SSLENGINE;
31
32 static {
33 Method isConscryptSSLEngine = null;
34
35 // Only works on Java14 and earlier for now
36 // See https://github.com/google/conscrypt/issues/838
37 if (PlatformDependent.javaVersion() < 15 || PlatformDependent.isAndroid()) {
38 try {
39 Class<?> providerClass = Class.forName("org.conscrypt.OpenSSLProvider", true,
40 PlatformDependent.getClassLoader(ConscryptAlpnSslEngine.class));
41 providerClass.newInstance();
42
43 Class<?> conscryptClass = Class.forName("org.conscrypt.Conscrypt", true,
44 PlatformDependent.getClassLoader(ConscryptAlpnSslEngine.class));
45 isConscryptSSLEngine = conscryptClass.getMethod("isConscrypt", SSLEngine.class);
46 } catch (Throwable ignore) {
47 // ignore
48 }
49 }
50 IS_CONSCRYPT_SSLENGINE = isConscryptSSLEngine;
51 }
52
53 /**
54 * Indicates whether or not conscrypt is available on the current system.
55 */
56 static boolean isAvailable() {
57 return IS_CONSCRYPT_SSLENGINE != null;
58 }
59
60 /**
61 * Returns {@code true} if the passed in {@link SSLEngine} is handled by Conscrypt, {@code false} otherwise.
62 */
63 static boolean isEngineSupported(SSLEngine engine) {
64 try {
65 return IS_CONSCRYPT_SSLENGINE != null && (Boolean) IS_CONSCRYPT_SSLENGINE.invoke(null, engine);
66 } catch (IllegalAccessException ignore) {
67 return false;
68 } catch (InvocationTargetException ex) {
69 throw new RuntimeException(ex);
70 }
71 }
72
73 private Conscrypt() { }
74 }