| /* |
| * Copyright 2019 The gRPC Authors |
| * |
| * 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 io.grpc.internal; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.security.Provider; |
| |
| /** |
| * Utility to load dynamically Conscrypt when it is available. |
| */ |
| public final class ConscryptLoader { |
| private static final Method NEW_PROVIDER_METHOD; |
| private static final Method IS_CONSCRYPT_METHOD; |
| |
| static { |
| Method newProvider; |
| Method isConscrypt; |
| try { |
| Class<?> conscryptClass = Class.forName("org.conscrypt.Conscrypt"); |
| newProvider = conscryptClass.getMethod("newProvider"); |
| isConscrypt = conscryptClass.getMethod("isConscrypt", Provider.class); |
| } catch (ClassNotFoundException ex) { |
| newProvider = null; |
| isConscrypt = null; |
| } catch (NoSuchMethodException ex) { |
| throw new AssertionError(ex); |
| } |
| NEW_PROVIDER_METHOD = newProvider; |
| IS_CONSCRYPT_METHOD = isConscrypt; |
| } |
| |
| /** |
| * Returns {@code true} when the Conscrypt Java classes are available. Does not imply it actually |
| * works on this platform. |
| */ |
| public static boolean isPresent() { |
| return NEW_PROVIDER_METHOD != null; |
| } |
| |
| /** Same as {@code Conscrypt.isConscrypt(Provider)}. */ |
| public static boolean isConscrypt(Provider provider) { |
| if (!isPresent()) { |
| return false; |
| } |
| try { |
| return (Boolean) IS_CONSCRYPT_METHOD.invoke(null, provider); |
| } catch (IllegalAccessException ex) { |
| throw new AssertionError(ex); |
| } catch (InvocationTargetException ex) { |
| throw new AssertionError(ex); |
| } |
| } |
| |
| /** Same as {@code Conscrypt.newProvider()}. */ |
| public static Provider newProvider() throws Throwable { |
| if (!isPresent()) { |
| Class.forName("org.conscrypt.Conscrypt"); |
| throw new AssertionError("Unexpected failure referencing Conscrypt class"); |
| } |
| // Exceptions here probably mean something's wrong with the JNI loading. Maybe the platform is |
| // not supported. It's an error, but it may occur in some environments as part of normal |
| // operation. It's too hard to distinguish "normal" from "abnormal" failures here. |
| return (Provider) NEW_PROVIDER_METHOD.invoke(null); |
| } |
| } |