com.nimbusds.jose.crypto.bc.BouncyCastleFIPSProviderSingleton Maven / Gradle / Ivy
/*
* nimbus-jose-jwt
*
* Copyright 2012-2021, 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.jcajce.provider.BouncyCastleFipsProvider;
/**
* BouncyCastle FIPS JCA provider singleton, intended to prevent memory leaks
* by ensuring a single instance is loaded at all times. Application code that
* needs a BouncyCastle FIPS JCA provider should use the {@link #getInstance()}
* method to obtain an instance.
*
* Requires the following optional dependency:
*
*
* <dependency>
* <groupId>org.bouncycastle</groupId>
* <artifactId>bc-fips</artifactId>
* <version>[1.0.2,2.0.0)</version>
* <optional>true</optional>
* </dependency>
*
*
* Important: The plain BouncyCastle JCA provider
* dependency must not be present to prevent class conflicts!
*
* @author Vladimir Dzhuvinov
*/
public final class BouncyCastleFIPSProviderSingleton {
/**
* The BouncyCastle FIPS provider, lazily instantiated.
*/
private static BouncyCastleFipsProvider bouncyCastleFIPSProvider;
/**
* Prevents external instantiation.
*/
private BouncyCastleFIPSProviderSingleton() { }
/**
* Returns a BouncyCastle FIPS JCA provider instance.
*
* @return The BouncyCastle FIPS JCA provider instance.
*/
public static BouncyCastleFipsProvider getInstance() {
if (bouncyCastleFIPSProvider == null) {
bouncyCastleFIPSProvider = new BouncyCastleFipsProvider();
}
return bouncyCastleFIPSProvider;
}
}