package com.dji.sample.droneairport.utils;
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import cn.hutool.core.codec.Base64;
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import cn.hutool.core.util.HexUtil;
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import cn.hutool.crypto.asymmetric.SM2;
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import java.nio.charset.StandardCharsets;
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public class AuthUtil {
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/**
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* 国土调查云获取token
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* 1、获取当前时间的时间的毫秒时间戳A
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* 2、用调用方的数字证书B和A进行字符串顺序拼接得到字符串C
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* 3、获取字符串C的UTF-8字节数组D
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* 4、采用调用方的私钥，使用SM2签名算法对字节数组D进行签名得到字节数组E
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* 5、对字节数组E进行base64编码得到字符串F
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* 6、组装得到token：{B}.{A}.{F}
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* @return
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*/
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public static String getToken() {
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String privateKey = "00D631FD5615416EAB63D33A9E66E801F95DE840567504210080006081DE877AE3";
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String publicKey = "04225AACF606D800EA3C2C31FCF8FB161B15F7A8D0460DEB91013D4F228C455E76A2ED8D71BC6525B5DC5CC015C155479D8839950344AEE438A3A6305C90F8269F";
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SM2 sm2 = new SM2(privateKey, publicKey);
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sm2.usePlainEncoding();
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//SM2 token生成
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String certCode = "UAV32_WHR4E3UAJZTE3KE5IZFDGL7CBU";
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long timestamp = System.currentTimeMillis();
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//拼接待签名数据
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String needSignData = certCode + timestamp;
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byte[] needSignDataByte = needSignData.getBytes(StandardCharsets.UTF_8);
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//签名
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byte[] signData = sm2.sign(needSignDataByte);
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String signDataHex = HexUtil.encodeHexStr(signData);
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// System.out.println("sign Hex:" + signDataHex);
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String signDataBase64 = Base64.encode(signData);
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// System.out.println("sign Base64:" + signDataBase64);
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//生成token
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String token = certCode + "." + timestamp + "." + signDataBase64;
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// System.out.println("token:" + token);
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//SM2 token验证
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boolean rst1 = sm2.verify(needSignDataByte, signData);
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// System.out.println("verify result:" + rst1);
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boolean rst2 = sm2.verify(needSignDataByte, HexUtil.decodeHex(signDataHex));
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// System.out.println("verify result:" + rst2);
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boolean rst3 = sm2.verify(needSignDataByte, Base64.decode(signDataBase64));
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// System.out.println("verify result:" + rst3);
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return certCode + "." + timestamp + "." + signDataBase64;
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}
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public static void main(String[] args) {
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System.out.println("token:" + getToken());
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}
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}
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