package com.gkhy.exam.pay.utils;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import java.util.Date;

public class SignCommond {

    public SignDto signSm3Detach(String plain) {

        try {
            // 使用 SM3 算法生成摘要
            MessageDigest md = MessageDigest.getInstance("SM3");
            byte[] hashBytes = md.digest(plain.getBytes());

            // 将摘要转换为 Base64 编码的字符串
            String signatureValue = Base64.getEncoder().encodeToString(hashBytes);

            SignDto signDto = new SignDto(new Date(), signatureValue, "1234567890", "issuerDn");

            return signDto;

        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        }

        return null;
    }
}