org.dromara.hutool.crypto.digest.mac.JCEMacEngine Maven / Gradle / Ivy
/*
* Copyright (c) 2013-2024 Hutool Team and hutool.cn
*
* 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 org.dromara.hutool.crypto.digest.mac;
import org.dromara.hutool.core.lang.wrapper.SimpleWrapper;
import org.dromara.hutool.crypto.CryptoException;
import org.dromara.hutool.crypto.KeyUtil;
import org.dromara.hutool.crypto.SecureUtil;
import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;
/**
* JDK提供的的MAC算法实现引擎,使用{@link Mac} 实现摘要
* 当引入BouncyCastle库时自动使用其作为Provider
*
* @author Looly
* @since 4.5.13
*/
public class JCEMacEngine extends SimpleWrapper implements MacEngine {
// region ----- Constructor
/**
* 构造
*
* @param algorithm 算法
* @param key 密钥
* @since 4.5.13
*/
public JCEMacEngine(final String algorithm, final byte[] key) {
this(algorithm, (null == key) ? null : new SecretKeySpec(key, algorithm));
}
/**
* 构造
*
* @param algorithm 算法
* @param key 密钥
* @since 4.5.13
*/
public JCEMacEngine(final String algorithm, final Key key) {
this(algorithm, key, null);
}
/**
* 构造
*
* @param algorithm 算法
* @param key 密钥
* @param spec {@link AlgorithmParameterSpec}
* @since 5.7.12
*/
public JCEMacEngine(final String algorithm, final Key key, final AlgorithmParameterSpec spec) {
super(initMac(algorithm, key, spec));
}
// endregion
@Override
public void update(final byte[] in) {
this.raw.update(in);
}
@Override
public void update(final byte[] in, final int inOff, final int len) {
this.raw.update(in, inOff, len);
}
@Override
public byte[] doFinal() {
return this.raw.doFinal();
}
@Override
public void reset() {
this.raw.reset();
}
@Override
public int getMacLength() {
return this.raw.getMacLength();
}
@Override
public String getAlgorithm() {
return this.raw.getAlgorithm();
}
/**
* 初始化
*
* @param algorithm 算法
* @param key 密钥 {@link SecretKey}
* @param spec {@link AlgorithmParameterSpec}
* @return this
* @throws CryptoException Cause by IOException
*/
private static Mac initMac(final String algorithm, Key key, final AlgorithmParameterSpec spec) {
final Mac mac;
try {
mac = SecureUtil.createMac(algorithm);
if (null == key) {
key = KeyUtil.generateKey(algorithm);
}
if (null != spec) {
mac.init(key, spec);
} else {
mac.init(key);
}
} catch (final Exception e) {
throw new CryptoException(e);
}
return mac;
}
}