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 javax.net.ssl.SSLEngine;
21 import java.lang.reflect.InvocationTargetException;
22 import java.lang.reflect.Method;
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 if ((PlatformDependent.javaVersion() >= 8 &&
36 // Only works on Java14 and earlier for now
37 // See https://github.com/google/conscrypt/issues/838
38 PlatformDependent.javaVersion() < 15) || PlatformDependent.isAndroid()) {
39 try {
40 Class<?> providerClass = Class.forName("org.conscrypt.OpenSSLProvider", true,
41 PlatformDependent.getClassLoader(ConscryptAlpnSslEngine.class));
42 providerClass.newInstance();
43
44 Class<?> conscryptClass = Class.forName("org.conscrypt.Conscrypt", true,
45 PlatformDependent.getClassLoader(ConscryptAlpnSslEngine.class));
46 isConscryptSSLEngine = conscryptClass.getMethod("isConscrypt", SSLEngine.class);
47 } catch (Throwable ignore) {
48 // ignore
49 }
50 }
51 IS_CONSCRYPT_SSLENGINE = isConscryptSSLEngine;
52 }
53
54 /**
55 * Indicates whether or not conscrypt is available on the current system.
56 */
57 static boolean isAvailable() {
58 return IS_CONSCRYPT_SSLENGINE != null;
59 }
60
61 /**
62 * Returns {@code true} if the passed in {@link SSLEngine} is handled by Conscrypt, {@code false} otherwise.
63 */
64 static boolean isEngineSupported(SSLEngine engine) {
65 try {
66 return IS_CONSCRYPT_SSLENGINE != null && (Boolean) IS_CONSCRYPT_SSLENGINE.invoke(null, engine);
67 } catch (IllegalAccessException ignore) {
68 return false;
69 } catch (InvocationTargetException ex) {
70 throw new RuntimeException(ex);
71 }
72 }
73
74 private Conscrypt() { }
75 }