com.nimbusds.jose.crypto.bc.BouncyCastleProviderSingleton Maven / Gradle / Ivy
/*
* nimbus-jose-jwt
*
* Copyright 2012-2016, Connect2id Ltd.
*
* 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 com.nimbusds.jose.crypto.bc;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
/**
* BouncyCastle JCA provider singleton, intended to prevent memory leaks by
* ensuring a single instance is loaded at all times. Application code that
* needs a BouncyCastle JCA provider should use the {@link #getInstance()}
* method to obtain an instance.
*
* Requires the following optional dependency:
*
*
* <dependency>
* <groupId>org.bouncycastle</groupId>
* <artifactId>bcprov-jdk15on</artifactId>
* <version>[1.68,2.0.0)</version>
* <optional>true</optional>
* </dependency>
*
*
* Important: The BouncyCastle FIPS JCA provider dependency
* must not be present to prevent class conflicts!
*
* @author Vladimir Dzhuvinov
*/
public final class BouncyCastleProviderSingleton {
/**
* The BouncyCastle provider, lazily instantiated.
*/
private static BouncyCastleProvider bouncyCastleProvider;
/**
* Prevents external instantiation.
*/
private BouncyCastleProviderSingleton() { }
/**
* Returns a BouncyCastle JCA provider instance.
*
* @return The BouncyCastle JCA provider instance.
*/
public static BouncyCastleProvider getInstance() {
if (bouncyCastleProvider == null) {
bouncyCastleProvider = new BouncyCastleProvider();
}
return bouncyCastleProvider;
}
}