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/*********************************************************************************
 *                                                                               *
 * The MIT License (MIT)                                                         *
 *                                                                               *
 * Copyright (c) 2015-2020 aoju.org Greg Messner and other contributors.         *
 *                                                                               *
 * Permission is hereby granted, free of charge, to any person obtaining a copy  *
 * of this software and associated documentation files (the "Software"), to deal *
 * in the Software without restriction, including without limitation the rights  *
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell     *
 * copies of the Software, and to permit persons to whom the Software is         *
 * furnished to do so, subject to the following conditions:                      *
 *                                                                               *
 * The above copyright notice and this permission notice shall be included in    *
 * all copies or substantial portions of the Software.                           *
 *                                                                               *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR    *
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,      *
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE   *
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER        *
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, *
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN     *
 * THE SOFTWARE.                                                                 *
 ********************************************************************************/
package org.aoju.bus.crypto;

import java.security.Provider;

/**
 * 全局单例的 org.bouncycastle.jce.provider.BouncyCastleProvider 对象
 *
 * @author Kimi Liu
 * @version 6.1.1
 * @since JDK 1.8+
 */
public class Holder {

    private static boolean useBouncyCastle = true;

    /**
     * 设置是否使用Bouncy Castle库
     * 如果设置为false,表示强制关闭Bouncy Castle而使用JDK
     *
     * @param isUseBouncyCastle 是否使用BouncyCastle库
     */
    public static void setUseBouncyCastle(boolean isUseBouncyCastle) {
        useBouncyCastle = isUseBouncyCastle;
    }

    /**
     * 创建Bouncy Castle 提供者
     * 如果用户未引入bouncycastle库,则此方法抛出{@link NoClassDefFoundError} 异常
     *
     * @return {@link  Provider}
     */
    public Provider createBouncyCastleProvider() {
        return new org.bouncycastle.jce.provider.BouncyCastleProvider();
    }

    /**
     * 获取{@link Provider}
     *
     * @return {@link Provider}
     */
    public Provider getProvider() {
        return useBouncyCastle ? createBouncyCastleProvider() : null;
    }

}




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