SM2实现前端发送加密报文,后端解密报文
Posted Xfei0314
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原作者在这 https://www.cnblogs.com/iroc1994/p/16399496.html
感谢原创
此文做记录使用,同时稍作修改,思路正确,内容未核验,有问题请不吝指正,后期会验证不断修改!
环境:
在工作中,前端页面发送的报文可能涉及到用户信息,为确保数据安全,需要对请求的数据加密,采用SM2非对称加密,可以有效解决数据的安全问题。
前端加密,后端解密Demo源码下载地址
https://gitee.com/iroc-git/springboot-encryptreq.git
实现步骤:
第一步:在Maven项目中引入pom依赖,注意依赖的jar包版本要在1.6以上,同时检查是否有bcprov-jdk16.*.的jar包(一般都会有),需要删掉(不放心可以先备份),否则会冲突报错
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.67</version>
</dependency>
第二步:生成公钥和私钥
工具类GetPKs
package com.iroc.springboot.util;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.generators.ECKeyPairGenerator;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECKeyGenerationParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.crypto.params.ECPublicKeyParameters;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.util.encoders.Hex;
import java.math.BigInteger;
import java.security.SecureRandom;
//获取sm2公钥与私钥
public class GetPKs
public static void main(String[] args)
try
X9ECParameters sm2ECParameters = GMNamedCurves.getByName("sm2p256v1");
ECDomainParameters domainParameters = new ECDomainParameters(sm2ECParameters.getCurve(), sm2ECParameters.getG(), sm2ECParameters.getN());
ECKeyPairGenerator keyPairGenerator = new ECKeyPairGenerator();
keyPairGenerator.init(new ECKeyGenerationParameters(domainParameters, SecureRandom.getInstance("SHA1PRNG")));
AsymmetricCipherKeyPair asymmetricCipherKeyPair = keyPairGenerator.generateKeyPair();
//上面的代码都是直接用maven依赖中的包直接import就可以用了
//还有一些更底层的写法,可以自己搜索一下,图方便的这个挺好的
//私钥,16进制格式,自己保存
BigInteger privatekey = ((ECPrivateKeyParameters) asymmetricCipherKeyPair.getPrivate()).getD();
String privateKeyHex = privatekey.toString(16);
System.out.println("private Key :" + privateKeyHex);
//公钥,16进制格式,发给前端
ECPoint ecPoint = ((ECPublicKeyParameters) asymmetricCipherKeyPair.getPublic()).getQ();
String publicKeyHex = Hex.toHexString(ecPoint.getEncoded(false));
System.out.println("Public Key :" + publicKeyHex);
catch (Exception e)
e.printStackTrace();
执行后:
private Key :5e3dcfb19758d7829ebce1ee4276f8193951e0cb77040a319403fce5231cab0e
Public Key :045417fe9233682d37355d2f64db75fb6ff1146efb68cf409cdd64bb7e31a448047c337b0edd919501f678181a230d91e621029bc64faf7fca3631ac2c869673b9
第三步:在前端页面中对请求数据加密
1.引入crypto-js.js和sm2.js
请在github中下载(https://github.com/Saberization/SM2)
下载这两个文件放到项目对应的位置
2.对请求报文加密
//sm2公钥
var pubkeyHex = "045417fe9233682d37355d2f64db75fb6ff1146efb68cf409cdd64bb7e31a448047c337b0edd919501f678181a230d91e621029bc64faf7fca3631ac2c869673b9";
//对请求报文加密
jsonReqParams=sm2Encrypt(jsonReqParams, pubkeyHex, 0);
前端页面login.html完整的代码
<!DOCTYPE html>
<head>
<meta charset="utf-8" />
<script src="../js/crypto-js.js"></script>
<script src="../js/sm2.js"></script>
<script src="../js/jquery-3.4.1.min.js"></script>
<script>
$(document).ready(function ()
$("#submit").click(function ()
var username = $("#username").val();
var password = $("#password").val();
var jsonReqParams =
;
jsonReqParams.username=username;
jsonReqParams.password=password;
jsonReqParams=JSON.stringify(jsonReqParams);
//sm2公钥
var pubkeyHex = "045417fe9233682d37355d2f64db75fb6ff1146efb68cf409cdd64bb7e31a448047c337b0edd919501f678181a230d91e621029bc64faf7fca3631ac2c869673b9";
//对请求报文加密
jsonReqParams=sm2Encrypt(jsonReqParams, pubkeyHex, 0);
//发送请求到后端
$.ajax(
type: 'POST', //方法类型
dataType: 'json', //预期服务器返回的数据类型
url: '/login', //请求地址
data: 'jsonReqParams': jsonReqParams ,
contentType: 'application/x-www-form-urlencoded; charset=utf-8',
success: function (data)
if(data.code == "1001")
$("#result").html("登录成功");
else if(data.code== "1002")
$("#result").html("登录失败");
else
$("#result").html("出现异常,请联系管理员");
,
error: function ()
$("#result").html("出现异常,请联系管理员");
,
);
);
);
</script>
</head>
<body>
用户名:<input type="text" id="username" /><br />
密码:<input type="password" id="password" /><br />
<button id="submit">登录</button><br />
<span id="result"></span>
</body>
第四步:后端接收前端的请求报文,并解密
1.在后端引入解密工具类DecryptUtil.java
package com.iroc.springboot.util;
import org.apache.tomcat.util.codec.binary.Base64;
import org.bouncycastle.asn1.gm.GMNamedCurves;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.crypto.engines.SM2Engine;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
import org.bouncycastle.util.encoders.Hex;
import java.math.BigInteger;
//解密前端页面的请求报文
public class DecryptUtil
public static String decrypt(String cipherData) throws Exception
byte[] cipherDataByte = Hex.decode(cipherData);
//sm2私钥
String privateKey = "5e3dcfb19758d7829ebce1ee4276f8193951e0cb77040a319403fce5231cab0e";
BigInteger privateKeyD = new BigInteger(privateKey, 16);
X9ECParameters sm2ECParameters1 = GMNamedCurves.getByName("sm2p256v1");
ECDomainParameters domainParameters1 = new ECDomainParameters(sm2ECParameters1.getCurve(), sm2ECParameters1.getG(), sm2ECParameters1.getN());
ECPrivateKeyParameters privateKeyParameters = new ECPrivateKeyParameters(privateKeyD, domainParameters1);
//用私钥解密
SM2Engine sm2Engine = new SM2Engine();
sm2Engine.init(false, privateKeyParameters);
//processBlock得到Base64格式,记得解码
byte[] arrayOfBytes = Base64.decodeBase64(sm2Engine.processBlock(cipherDataByte, 0, cipherDataByte.length));
//得到明文:SM2 Encryption Test
String data = new String(arrayOfBytes);
return data;
2.解密前端请求的报文
package com.iroc.springboot.controller;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.iroc.springboot.util.DecryptUtil;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;
@Controller
public class LoginController
@RequestMapping(value = "/login",method = RequestMethod.POST)
@ResponseBody
public String login(@RequestParam(value = "jsonReqParams") String jsonReqParams)
JsonObject result = new JsonObject();
//设数据库中username为zhangsan,password为123456
try
//解密前端请求的报文
jsonReqParams = DecryptUtil.decrypt(jsonReqParams);
JsonObject jsonObject = new JsonParser().parse(jsonReqParams).getAsJsonObject();
String username = jsonObject.get("username").getAsString();
String password = jsonObject.get("password").getAsString();
if("zhangsan".equals(username)&&"123456".equals(password))
result.addProperty("code","1001");
result.addProperty("desc","登录成功");
else
result.addProperty("code","1002");
result.addProperty("desc","账号或密码有误");
catch (Exception e)
e.printStackTrace();
result.addProperty("code","1003");
result.addProperty("desc","出现异常,请联系管理员");
return result.toString();
参考文章
-
https://blog.csdn.net/python_small_pan/article/details/120064529
-
https://github.com/Saberization/SM2
-
https://blog.51cto.com/boytnt/2503384
国密SM2前端VUE,后端Hutool工具的搭配
背景
当要实现请求参数加密的功能,使用的是国密SM2算法,前端向后台发送请求获取公钥,将请求加密发送到后台,后台用对应的私钥进行解密
解决方案:
前端采用:SM2加密js库(sm-crypto)
后端采用:Hutool工具
由于当前的前端SM2加密js库(sm-crypto)都是使用SM2公钥的Q值转成16进制进行加密,所以在后台给前端发送公钥时,需要提取公钥的Q值并且转成16进制。
后端生成秘钥对与前端的公钥公钥Q
/**
* 生成SM2公钥,私钥,公钥Q,私钥D <br/>
* 通常由于js端提供的 SM2代码实现的方案,都是直接使用的私钥的d值和公钥的q值直接进行的加解密,
* 所以后端返回的是从公钥里面提取的q值,以q值做为js端的加密公钥,从私钥提取d值,作为js端的解密私钥
* @author 杨攀
* @date 2021/5/13 16:29
* @param
* @return void
*/
public static void createSm2Key() {
SM2 sm = SmUtil.sm2();
// sm2的加解密时有两种方式即 C1C2C3、 C1C3C2,
sm.setMode(SM2Engine.Mode.C1C3C2);
// 生成私钥
String privateKey = HexUtil.encodeHexStr(sm.getPrivateKey().getEncoded());
LOGGER.info("私钥: {}", privateKey);
// 生成公钥
String publicKey = HexUtil.encodeHexStr(sm.getPublicKey().getEncoded());
LOGGER.info("公钥: {}", publicKey);
// 生成私钥D
String privateKeyD = HexUtil.encodeHexStr(BCUtil.encodeECPrivateKey(sm.getPrivateKey())); // ((BCECPrivateKey) privateKey).getD().toByteArray();
LOGGER.info("私钥D: {}", privateKeyD);
// 生成公钥Q,以q值做为js端的加密公钥
String publicKeyQ = HexUtil.encodeHexStr(((BCECPublicKey) sm.getPublicKey()).getQ().getEncoded(false));
LOGGER.info("公钥Q: {}", publicKeyQ);
}
前段根据公钥Q进行加密
前端测试代码:
data() {
return {
// 请求的 service
service: this.$svc.sys.demo,
// 表单数据
formData: {
content: \'\',
encContent: \'\',
decContent: \'\',
},
// 公钥Q
publicKey:\'04be3415fd3a7231fa23e4cfdf6f857b0f3137e75692f7b5011d459afc0cdd7741676dca32ca6489cfe0f0fd43b5e9f9f0f77c7997630ba1142c725178a9181558\',
// 私钥D (测试才放前端)
privateKey: \'74b24bfa8a55127c0fcbe87d7a112e398fd291fd72314e1c56e8d575664a1148\',
}
},
方法:
// 加密
sm2Encrypt() {
const sm2 = require(\'sm-crypto\').sm2
//let keypair = sm2.generateKeyPairHex()
//this.publicKey = keypair.publicKey // 公钥
//this.privateKey = keypair.privateKey // 私钥
const cipherMode = 1 // 1 - C1C3C2,0 - C1C2C3,默认为 1
//let publicKey = "3059301306072a8648ce3d020106082a811ccf5501822d03420004efddac6873492c460eac87b0b12bec1258f181a5093d62bbb622a7192d58c6c7278f45880dfc226bb0b645268e33a3a8de9d12b7397e05ab729fb35ead70dded";
let encContent = sm2.doEncrypt(this.formData.content, this.publicKey, cipherMode) // sm2加密
this.formData.encContent = encContent;
},
// 解密
sm2Decrypt() {
const sm2 = require(\'sm-crypto\').sm2
let encryptData = this.formData.encContent;
const cipherMode = 1 // 1 - C1C3C2,0 - C1C2C3,默认为 1
let decryptData = sm2.doDecrypt(encryptData, this.privateKey, cipherMode) // 解密结果sm2
this.formData.decContent = decryptData;
},
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