package com.dl.common.encrypt.encryptor;
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import cn.hutool.core.util.StrUtil;
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import cn.hutool.crypto.SmUtil;
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import cn.hutool.crypto.symmetric.SM4;
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import com.dl.common.encrypt.EncryptContext;
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import com.dl.common.enums.AlgorithmType;
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import com.dl.common.enums.EncodeType;
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import java.nio.charset.StandardCharsets;
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/**
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* sm4算法实现
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*
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* @author 老马
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* @version 4.6.0
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*/
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public class Sm4Encryptor extends AbstractEncryptor {
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private final SM4 sm4;
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public Sm4Encryptor(EncryptContext context) {
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super(context);
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String password = context.getPassword();
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if (StrUtil.isBlank(password)) {
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throw new IllegalArgumentException("SM4没有获得秘钥信息");
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}
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// sm4算法的秘钥要求是16位长度
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if (16 != password.length()) {
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throw new IllegalArgumentException("SM4秘钥长度应该为16位，实际为" + password.length() + "位");
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}
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this.sm4 = SmUtil.sm4(password.getBytes(StandardCharsets.UTF_8));
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}
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/**
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* 获得当前算法
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*/
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@Override
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public AlgorithmType algorithm() {
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return AlgorithmType.SM4;
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}
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/**
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* 加密
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*
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* @param value 待加密字符串
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* @param encodeType 加密后的编码格式
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*/
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@Override
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public String encrypt(String value, EncodeType encodeType) {
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if (encodeType == EncodeType.HEX) {
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return sm4.encryptHex(value);
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} else {
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return sm4.encryptBase64(value);
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}
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}
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/**
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* 解密
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*
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* @param value 待加密字符串
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*/
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@Override
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public String decrypt(String value) {
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return this.sm4.decryptStr(value);
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}
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}
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