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Java library for Javascript Object Signing and Encryption (JOSE) and JSON Web Tokens (JWT)

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/*
 * nimbus-jose-jwt
 *
 * Copyright 2012-2016, Connect2id Ltd and contributors.
 *
 * 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.impl;


import java.security.AlgorithmParameters;
import java.security.NoSuchAlgorithmException;
import java.security.Provider;


/**
 * Utility for creating {@link java.security.AlgorithmParameters} objects with
 * an optional JCA provider.
 *
 * @author Justin Richer
 */
public class AlgorithmParametersHelper {


	/**
	 * Creates a new {@link java.security.AlgorithmParameters} instance.
	 *
	 * @param name     The name of the requested algorithm. Must not be
	 *                 {@code null}.
	 * @param provider The JCA provider, {@code null} to use the default.
	 *
	 * @return The AlgorithmParameters instance.
	 *
	 * @throws NoSuchAlgorithmException If an AlgorithmParameterGeneratorSpi
	 *                                  implementation for the specified
	 *                                  algorithm is not available from the
	 *                                  specified Provider object.
	 */
	public static AlgorithmParameters getInstance(final String name, final Provider provider)
		throws NoSuchAlgorithmException {

		if (provider == null) {
			return AlgorithmParameters.getInstance(name);
		} else {
			return AlgorithmParameters.getInstance(name, provider);
		}
	}
}