网Js RSA加密,后端（Asp.Net）解码（非对称加解密）

前言

RSA加解密知识自行百度了解决一下

1、取得公钥与私钥方法

JSEncrypt Download

网Js RSA加密,后端（Asp.Net）解码（非对称加解密）-LMLPHP

下载后将其发布成网站进入：http://127.0.0.1:3000/demo/index.html （各自服务器站口不一样自行）

网Js RSA加密,后端（Asp.Net）解码（非对称加解密）-LMLPHP

这样就得到一公钥和私钥

另一种生成公钥与私钥的方法如下：引用 https://blog.csdn.net/qq_39081974/article/details/81059022

======================================Begin======================================

1. OpenSSL官网
官方下载地址： https://www.openssl.org/source/

2. Windows安装方法
OpenSSL官网没有提供windows版本的安装包，可以选择其他开源平台提供的工具。例如 http://slproweb.com/products/Win32OpenSSL.html
以该工具为例，安装步骤和使用方法如下：

2.1 选择32位或者64位合适的版本下载，例如Win64OpenSSL_Light-1_0_2h.exe：

2.2 设置环境变量，例如工具安装在C:\OpenSSL-Win64，则将C:\OpenSSL-Win64\bin；复制到Path中

2.3 打开命令行程序cmd（以管理员身份运行），运行以下命令:

这里路径就是保存地址

利用　openssl　生成公钥私钥
生成公钥： openssl genrsa -out rsa_private_key.pem 1024
生成私钥: openssl rsa -in rsa_private_key.pem -pubout -out rsa_public_key.pem

======================================End=======================================

2、实践（引用：https://www.jb51.net/article/117127.htm）

参数传递的+号处理，在传输时会把+变成空格，不处理后端就报错了。

1、前端代码

<!DOCTYPE html>

<html>

<head>

<meta name="viewport" content="width=device-width" />

<title>Login</title>

<script src="jquery-1.10.2.min.js"></script>

<script src="jsencrypt.min.js"></script>

<script type="text/javascript">

$(function () {

var encrypt = new JSEncrypt();

encrypt.setPublicKey($("#tra").val());

var data = encrypt.encrypt("123456789");

alert(data);

$("#btn").click(function () {

$.ajax({

url: '@Url.Action("Login")',

data: "pwd=" + encodeURI(data).replace(/\+/g, '%2B'),

//+号的处理：因为数据在网络上传输时，非字母数字字符都将被替换成百分号（%）后跟两位十六进制数，而base64编码在传输到后端的时候，+会变成空格，因此先替换掉。后端再替换回来

type: 'post',

success: function (msg) {

alert(msg);

}

});

</script>

</head>

<body>

<div>

<input type="button" id="btn" value="点我" />

<textarea id="tra" rows="15" cols="65">

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCa4KHNwDX44gGmmIAtRu4gjVYt

GWZzcm4t+1wjUD4dn7fMLPvuK7ai4UrfDeEJE1RPwudJw+lJ6crql8wSIg7/DbTl

G3ihsCT6dT9H5B9OoeR7K9VWUesaW/iyVL6HXiYOANabW14pvJATDmdq91Tfgp6P

SQyvdfiRdV4r07crpQIDAQAB

</textarea>

<hr/>

注意+号的处理

</div>

</body>

</html>

2、后端代码

100

public class IndexController : Controller

{

public ActionResult Login()

{

return View();

}

[HttpPost]

public ActionResult Login(string pwd)

{

//密钥格式要生成pkcs#1格式的而不是pkcs#8格式的

string privateKey =

@"MIICWwIBAAKBgQCa4KHNwDX44gGmmIAtRu4gjVYtGWZzcm4t+1wjUD4dn7fMLPvuK7ai4UrfDeEJE1RPwudJw+lJ6crql8wSIg7/DbTlG3ihsCT6dT9H5B9OoeR7K9VW

UesaW/iyVL6HXiYOANabW14pvJATDmdq91Tfgp6PSQyvdfiRdV4r07crpQIDAQAB

AoGABb+3gdb+qeG0b1CogVsT/7//UOaTzPk/FGneKQQTf4SsN+H7lVhTYTG9ARFC

JyoWg8IXqmn2ljhywHPTWWD2RCZIn2sYT1sVkGb70EgHGQLBraFHElmw+DsVJ+nD

fBCfMrJ1TYXlwigjRkaueaoGgG8LdR8XD+Xs5LersPLjZgECQQCguSB7C4wF6oSw

EDmwNF8ffT5cQc1U2OIq6NBG8rafrjb7LsjhOd03pmY7i4LbW3Vvq4AhQpJEdF1C

vd+Sk/BBAkEA9rBhqnyumV09zFEomSX3zZu+bdhTzM4bJDfEa95swp1gANCVvF/t

DCnlBf51EhCWdeGSpARPUkQnXrYfFUDiZQJAAZEshuaa6+fYeVr/JP+tucHf3Mhr

dxtSQTbZ6QcuzqnFMXfIT6HfzU4bCxOWKAthPsB+VFSw1mgIDMGLL4OvwQJAJlVy

V9PYLezXVZCnBmVoBINXLCqZmxHMFey0kS6XKAbcjEPdgNBHPcSk2jGYb540Q00y

RFqHGPmORKF4Yw0aIQJAd5JRtD3z2MgP/vPoKHJNHqY8bboVcmwqVAm6xCZoTCZz

jNV1Cnsdf4wBV3LCDzYBy+xR4qYNUy5CFXN+8WzzAA==";

try

{

RSACryptoServiceProvider rsaCryptoServiceProvider = CreateRsaProviderFromPrivateKey(privateKey);

//把+号，再替换回来

byte[] res = rsaCryptoServiceProvider.Decrypt(Convert.FromBase64String(pwd.Replace("%2B","+")), false);

return Content(Encoding.UTF8.GetString(res));

}

catch (Exception exception)

{

}

return Content("");

}

private RSACryptoServiceProvider CreateRsaProviderFromPrivateKey(string privateKey)

{

var privateKeyBits = System.Convert.FromBase64String(privateKey);

var RSA = new RSACryptoServiceProvider();

var RSAparams = new RSAParameters();

using (BinaryReader binr = new BinaryReader(new MemoryStream(privateKeyBits)))

{

byte bt = 0;

ushort twobytes = 0;

twobytes = binr.ReadUInt16();

if (twobytes == 0x8130)

binr.ReadByte();

else if (twobytes == 0x8230)

binr.ReadInt16();

else

throw new Exception("Unexpected value read binr.ReadUInt16()");

twobytes = binr.ReadUInt16();

if (twobytes != 0x0102)

throw new Exception("Unexpected version");

bt = binr.ReadByte();

if (bt != 0x00)

throw new Exception("Unexpected value read binr.ReadByte()");

RSAparams.Modulus = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.Exponent = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.D = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.P = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.Q = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.DP = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.DQ = binr.ReadBytes(GetIntegerSize(binr));

RSAparams.InverseQ = binr.ReadBytes(GetIntegerSize(binr));

}

RSA.ImportParameters(RSAparams);

return RSA;

}

private int GetIntegerSize(BinaryReader binr)

{

byte bt = 0;

byte lowbyte = 0x00;

byte highbyte = 0x00;

int count = 0;

bt = binr.ReadByte();

if (bt != 0x02)

return 0;

bt = binr.ReadByte();

if (bt == 0x81)

count = binr.ReadByte();

else

if (bt == 0x82)

{

highbyte = binr.ReadByte();

lowbyte = binr.ReadByte();

byte[] modint = { lowbyte, highbyte, 0x00, 0x00 };

count = BitConverter.ToInt32(modint, 0);

}

else

{

count = bt;

}

while (binr.ReadByte() == 0x00)

{

count -= 1;

}

binr.BaseStream.Seek(-1, SeekOrigin.Current);

return count;

}

测试源码在下面GitHub上有（可以给我留言）

https://github.com/xiaoruilin/EncryptionDecrypt

加密参数过长？https://www.jianshu.com/p/444011941cac

布署：

IIS发布后报错配置：应用程序池-》对应网站有应用程序-》右键-》高级-》进程模式-》加载用户配置文件=True;

网Js RSA加密,后端（Asp.Net）解码（非对称加解密）-LMLPHP

BT

网Js RSA加密,后端（Asp.Net）解码（非对称加解密）

加密参数过长？https://www.jianshu.com/p/444011941cac