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Issue eclipse-ee4j#2016 Better compatibility detection
- can run with any compatible implementation, not only NPN Bootstrap - with new JDK versions after 8u250 uses it's JSSE impl by default - still can use older NPN bootstrap versions if configured - can use also other implementations (openjsse) Signed-off-by: David Matejcek <dmatej@seznam.cz>
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modules/http2/src/main/java/org/glassfish/grizzly/http2/AplnExtensionCompatibility.java
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| /* | ||
| * Copyright (c) 2012, 2017 Oracle and/or its affiliates. All rights reserved. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License v. 2.0, which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0. | ||
| * | ||
| * This Source Code may also be made available under the following Secondary | ||
| * Licenses when the conditions for such availability set forth in the | ||
| * Eclipse Public License v. 2.0 are satisfied: GNU General Public License, | ||
| * version 2 with the GNU Classpath Exception, which is available at | ||
| * https://www.gnu.org/software/classpath/license.html. | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 | ||
| */ | ||
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| package org.glassfish.grizzly.http2; | ||
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| import java.lang.reflect.Method; | ||
| import java.util.Objects; | ||
| import java.util.function.BiFunction; | ||
| import java.util.logging.Logger; | ||
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| import javax.net.ssl.SSLEngine; | ||
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| class AplnExtensionCompatibility { | ||
| private static final Logger LOG = Logger.getLogger(AplnExtensionCompatibility.class.getName()); | ||
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| private static final String IMPL_CLASS_NAME = "sun.security.ssl.SSLEngineImpl"; | ||
| private static final String METHOD_NAME = "setHandshakeApplicationProtocolSelector"; | ||
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| private static AplnExtensionCompatibility INSTANCE; | ||
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| private final boolean alpnExtensionGrizzly; | ||
| private final boolean protocolSelectorSetterInApi; | ||
| private final boolean protocolSelectorSetterInImpl; | ||
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| public static synchronized AplnExtensionCompatibility getInstance() { | ||
| if (INSTANCE == null) { | ||
| INSTANCE = new AplnExtensionCompatibility(); | ||
| } | ||
| return INSTANCE; | ||
| } | ||
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| public boolean isAlpnExtensionAvailable() { | ||
| return isAlpnExtensionGrizzly() || isProtocolSelectorSetterInApi() || isProtocolSelectorSetterInImpl(); | ||
| } | ||
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| public boolean isAlpnExtensionGrizzly() { | ||
| return alpnExtensionGrizzly; | ||
| } | ||
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| public boolean isProtocolSelectorSetterInApi() { | ||
| return protocolSelectorSetterInApi; | ||
| } | ||
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| public boolean isProtocolSelectorSetterInImpl() { | ||
| return protocolSelectorSetterInImpl; | ||
| } | ||
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| public Method getProtocolSelectorSetter(final SSLEngine engine) { | ||
| Objects.requireNonNull(engine, "engine"); | ||
| try { | ||
| // newer JSSE versions implement this method. | ||
| // some JDK8 versions (Zulu 8u265) don't see the method as public on impl | ||
| final Class<? extends SSLEngine> engineClass; | ||
| if (isHandshakeSetterInApi()) { | ||
| engineClass = SSLEngine.class; | ||
| } else { | ||
| engineClass = engine.getClass(); | ||
| } | ||
| return engineClass.getMethod(METHOD_NAME, BiFunction.class); | ||
| } catch (final NoSuchMethodException e) { | ||
| throw new IllegalArgumentException("The method public void setHandshakeApplicationProtocolSelector(" | ||
| + "BiFunction<SSLEngine, List<String>, String> selector) is not declared by" | ||
| + " the " + engine.getClass().getName() + ".", e); | ||
| } | ||
| } | ||
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| private AplnExtensionCompatibility() { | ||
| this.alpnExtensionGrizzly = isClassAvailableOnBootstrapClasspath("sun.security.ssl.GrizzlyNPN"); | ||
| this.protocolSelectorSetterInApi = isHandshakeSetterInApi(); | ||
| this.protocolSelectorSetterInImpl = isHandshakeSetterInImpl(); | ||
| } | ||
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| private static boolean isClassAvailableOnBootstrapClasspath(final String className) { | ||
| try { | ||
| ClassLoader.getSystemClassLoader().loadClass(className); | ||
| return true; | ||
| } catch (final ClassNotFoundException e) { | ||
| LOG.config("The class with the name '" + className + "' is not available on the bootstrap classpath."); | ||
| return false; | ||
| } | ||
| } | ||
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| private static boolean isHandshakeSetterInImpl() { | ||
| try { | ||
| Class.forName(IMPL_CLASS_NAME).getMethod(METHOD_NAME, BiFunction.class); | ||
| return true; | ||
| } catch (final IllegalAccessError e) { | ||
| LOG.config(() -> "The class " + IMPL_CLASS_NAME + " is not accessible."); | ||
| return false; | ||
| } catch (final ClassNotFoundException | NoClassDefFoundError e) { | ||
| LOG.config(() -> "The class " + IMPL_CLASS_NAME + " cloud not be found."); | ||
| return false; | ||
| } catch (final NoSuchMethodException e) { | ||
| LOG.config(() -> "The method public void setHandshakeApplicationProtocolSelector(" | ||
| + "BiFunction<SSLEngine, List<String>, String> selector) is not declared by" | ||
| + " the " + IMPL_CLASS_NAME + " class."); | ||
| return false; | ||
| } | ||
| } | ||
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| private static boolean isHandshakeSetterInApi() { | ||
| try { | ||
| // new grizzly bootstrap versions implement this method. | ||
| SSLEngine.class.getMethod(METHOD_NAME, BiFunction.class); | ||
| return true; | ||
| } catch (final NoSuchMethodException e) { | ||
| LOG.config("The method public void setHandshakeApplicationProtocolSelector(" | ||
| + "BiFunction<SSLEngine, List<String>, String> selector) is not declared by" | ||
| + " the " + SSLEngine.class.getName() + "."); | ||
| return false; | ||
| } | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return super.toString() + "ALPN available: " + isAlpnExtensionAvailable() | ||
| + ", ALPN is Grizzly: " + isAlpnExtensionGrizzly() | ||
| + ", setHandshakeApplicationProtocolSelector in API: " + isProtocolSelectorSetterInApi() | ||
| + ", setHandshakeApplicationProtocolSelector in impl: " + isProtocolSelectorSetterInImpl(); | ||
| } | ||
| } |
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