cn.hutool.crypto.digest.mac.BCMacEngine Maven / Gradle / Ivy
package cn.hutool.crypto.digest.mac;
import org.bouncycastle.crypto.CipherParameters;
import org.bouncycastle.crypto.Mac;
import org.bouncycastle.crypto.params.KeyParameter;
/**
* BouncyCastle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 5.8.0
*/
public class BCMacEngine implements MacEngine {
private Mac mac;
// ------------------------------------------------------------------------------------------- Constructor start
/**
* 构造
*
* @param mac {@link Mac}
* @param params 参数，例如密钥可以用{@link KeyParameter}
* @since 5.8.0
*/
public BCMacEngine(Mac mac, CipherParameters params) {
init(mac, params);
}
// ------------------------------------------------------------------------------------------- Constructor end
/**
* 初始化
*
* @param mac 摘要算法
* @param params 参数，例如密钥可以用{@link KeyParameter}
* @return this
* @since 5.8.0
*/
public BCMacEngine init(Mac mac, CipherParameters params) {
mac.init(params);
this.mac = mac;
return this;
}
/**
* 获得 {@link Mac}
*
* @return {@link Mac}
*/
public Mac getMac() {
return mac;
}
@Override
public void update(byte[] in, int inOff, int len) {
this.mac.update(in, inOff, len);
}
@Override
public byte[] doFinal() {
final byte[] result = new byte[getMacLength()];
this.mac.doFinal(result, 0);
return result;
}
@Override
public void reset() {
this.mac.reset();
}
@Override
public int getMacLength() {
return mac.getMacSize();
}
@Override
public String getAlgorithm() {
return this.mac.getAlgorithmName();
}
}