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8da954f7a4
Also unify how new Security Providers are installed. Thanks to Paul Schaub for helping with this.
54 lines
1.8 KiB
Java
54 lines
1.8 KiB
Java
/**
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*
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* Copyright 2019 Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.lang.reflect.InvocationTargetException;
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import java.security.Provider;
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import java.security.Security;
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import org.jxmpp.util.cache.LruCache;
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public class SecurityUtil {
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private static final LruCache<Class<? extends Provider>, Void> INSERTED_PROVIDERS_CACHE = new LruCache<>(8);
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public static void ensureProviderAtFirstPosition(Class<? extends Provider> providerClass) {
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if (INSERTED_PROVIDERS_CACHE.containsKey(providerClass)) {
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return;
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}
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Provider provider;
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try {
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provider = providerClass.getDeclaredConstructor().newInstance();
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} catch (InstantiationException | IllegalAccessException | IllegalArgumentException | InvocationTargetException
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| NoSuchMethodException | SecurityException e) {
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throw new IllegalArgumentException(e);
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}
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String providerName = provider.getName();
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int installedPosition ;
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synchronized (Security.class) {
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Security.removeProvider(providerName);
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installedPosition = Security.insertProviderAt(provider, 1);
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}
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assert installedPosition == 1;
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INSERTED_PROVIDERS_CACHE.put(providerClass, null);
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}
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}
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