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Hutool是一个小而全的Java工具类库，通过静态方法封装，降低相关API的学习成本，提高工作效率，使Java拥有函数式语言般的优雅，让Java语言也可以“甜甜的”。

There is a newer version: 5.8.34

package cn.hutool.crypto.digest.mac;

import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.engines.SM4Engine;

/**
 * SM4算法的MAC引擎实现
 *
 * @author looly
 * @since 5.8.0
 */
public class SM4MacEngine extends CBCBlockCipherMacEngine {

	private static final int MAC_SIZE = 128;

	/**
	 * 构造
	 *
	 * @param params {@link CipherParameters}
	 */
	public SM4MacEngine(CipherParameters params) {
		super(new SM4Engine(), MAC_SIZE, params);
	}
}