本文详细介绍了前端请求参数加密、.NET 后端解密，文章较长，请各位看官耐心看完。
目录
一、前端使用“CryptoJS”，前端AES加密，.NET后端AES解密
1.1、加密解密效果图
1.2、CryptoJS介绍
CryptoJS是一个JavaScript的加解密的工具包。它支持多种的算法：MD5、SHA1、SHA2、SHA3、RIPEMD-160 哈希散列，进行 AES、DES、Rabbit、RC4、Triple DES 加解密。
1.3、准备工作：安装“CryptoJS”
1.3.1、使用npm进行安装
npm安装命令如下：
npm install crypto-js --save-dev
1.3.2、Visual Studio中安装
1.3.2.1、选择“客户端库”
1.3.2.2、安装下载“CryptoJS”
在“添加客户端库”界面：
- 提供程序：选择“unpkg”；
- 库：输入“crypto-js@”，进行版本的选择；
- 可选择：1、包括所有库文件；2、选择特定文件；
确认无误之后，点击“安装”即可。
1.4、H5页面代码中引用“crypto-js”
1.5、前端页面代码
1.5.1、Html代码
H5代码使用了Layui开原框架
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>sometext</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="/lib/jquery/dist/jquery.js"></script>
<script src="/lib/layui/dist/layui.js"></script>
<script src="/lib/bootstrap/dist/js/bootstrap.js"></script>
<script src="/lib/crypto-js/crypto-js.js"></script>
<link href="/lib/layui/dist/css/layui.css" rel="stylesheet" />
<link href="/lib/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />
<style type="text/css"></style>
</head>
<body>
<div class="wrapper">
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">脱敏/加密前的内容：</span>
</div>
<input type="password" class="form-control" id="sourctText" placeholder="脱敏/加密前的内容" aria-label="sourctText" aria-describedby="basic-addon1">
</div>
<br />
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">加密后的内容：</span>
</div>
<input type="text" class="form-control" id="encryptText" placeholder="加密后的内容" readonly="readonly" aria-label="encryptText" aria-describedby="basic-addon1">
</div>
<br />
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">脱敏/加密后的内容：</span>
</div>
<input type="text" class="form-control" id="resText" placeholder="脱敏/加密后的内容" readonly="readonly" aria-label="resText" aria-describedby="basic-addon1">
</div>
<div class="input-group mb-3">
<button id="submit" type="button" class="btn btn-primary btn-lg btn-block">提交</button>
</div>
</div>
</body>
</html>
1.5.2、javascript代码
说明：CBC模式前、后端需要确定偏移量的值，并且保持一致，这样才能确保后端解密成功。
<script type="text/javascript">
const KEY = CryptoJS.enc.Utf8.parse("lucasnetLUCASNET"); //16位
const IV = CryptoJS.enc.Utf8.parse("lucasnetLUCASNET");
layui.use(['form'], function () {
let form = layui.form;
$("#submit").on("click", function () {
let sourctText = $("#sourctText").val();
if (sourctText != "" && sourctText != null) {
let encryptText = wordEncrypt(sourctText);
$("#encryptText").val(encryptText);
login(encryptText);
} else {
layui.layer.alert("密码为空！", { icon: 5, title: "温馨提示", closeBtn: 0 });
}
});
function login(sourctText) {
var word_Encrypt = $.ajax({
url: "/Home/word_Encrypt",//请求后端接口的路径
dataType: "JSON",
type: "POST",
data: {
"ciphertextpwd": sourctText,
},
success: function (res) {
let resCode = res.code;
let resMsg = res.msg;
if ((resCode == "210" || resCode == 210) || (resCode == 220 || resCode == "220") || (resCode == 230 || resCode == "230") || (resCode == 240 || resCode == "240") || (resCode == 260 || resCode == "260")) {
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
word_Encrypt.abort(); // 删除 AJAX 请求
}, 2000);
layui.layer.alert(resMsg, { icon: 5, title: "温馨提示", closeBtn: 0 });
} else if (resCode == 200 || resCode == "200") {
$("#resText").val(resMsg);
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
word_Encrypt.abort(); // 删除 AJAX 请求
}, 2000);
}
},
error: function (error) {
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
word_Encrypt.abort(); // 删除 AJAX 请求
}, 2000);
layui.layer.alert(error, { icon: 5, title: "温馨提示", closeBtn: 0 });
}
});
}
/**
* 前端AES使用CBC加密 key,iv长度为16位,可相同 自定义即可
*/
function wordEncrypt(word) {
let key = KEY;
let iv = IV;
let encrypted = "";
if (typeof word == "string") {
let srcs = CryptoJS.enc.Utf8.parse(word);
encrypted = CryptoJS.AES.encrypt(srcs, key, {
iv: iv,
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7
});
} else if (typeof word == "object") {
//对象格式的转成json字符串
let data = JSON.stringify(word);
let srcs = CryptoJS.enc.Utf8.parse(data);
encrypted = CryptoJS.AES.encrypt(srcs, key, {
iv: iv,
mode: CryptoJS.mode.CBC,
padding: CryptoJS.pad.Pkcs7
});
}
return CryptoJS.enc.Base64.stringify(encrypted.ciphertext);
}
});
</script>
1.6、.NET 后端代码
1.6.1、定义公共的密匙字段
/// <summary>
/// //AES加密所需16位密匙
/// </summary>
private static readonly String strAesKey = "lucasnetLUCASNET";
/// <summary>
/// AES加密所需16位密匙向量
/// </summary>
private static readonly String strAesIv = "lucasnetLUCASNET";
1.6.2、封装AES解密方法
/// <summary>
/// AES 解密
/// </summary>
/// <param name="str">密文（待解密）</param>
/// <returns></returns>
public string AesDecrypt(string str)
{
if (string.IsNullOrEmpty(str)) return null;
Byte[] toEncryptArray = Convert.FromBase64String(str);
using (RijndaelManaged rm = new RijndaelManaged())
{
rm.Key = Encoding.UTF8.GetBytes(strAesKey);
rm.IV = Encoding.UTF8.GetBytes(strAesIv);
rm.Mode = CipherMode.CBC;
rm.Padding = PaddingMode.PKCS7;
rm.FeedbackSize = 128;
ICryptoTransform encryptor = rm.CreateDecryptor(rm.Key, rm.IV);
Byte[] resultArray = encryptor.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
return Encoding.UTF8.GetString(resultArray);
}
}
1.6.3、编写API接口
/// <summary>
/// 解密接口
/// </summary>
/// <param name="ciphertextpwd">密码密文（待解密）</param>
/// <param name="publicKey">公钥</param>
/// <param name="privateKey">私钥</param>
/// <returns></returns>
[HttpPost]
public IActionResult word_Encrypt(string ciphertextpwd)
{
string resPwd = "";
try
{
resPwd = AesDecrypt(ciphertextpwd);
return Json(new { code = 200, msg = resPwd });
}
catch (Exception ex)
{
return Json(new { code = 220, msg = "AES解密时出现错误！！！" });
}
}
二、前端使用“JSEncrypt”，进行非对称RSA加密，.NET后端解密
2.1、加密解密效果图
2.2、非对称加密
所谓的非对称，即加密和解密用的不是同一个秘钥。比如用公钥加密，就要用私钥解密。非对称加密的安全性是要好于对称加密的，但是性能就比较差了。
2.3、RSA
非对称加密算法中常用的就是 RSA 了。它是由在 MIT 工作的 3 个人于 1977 年提出，RSA 这个名字的由来便是取自他们 3 人的姓氏首字母。我们在访问 github 等远程 git 仓库时，如果是使用 SSH 协议，需要生成一对公私秘钥，就可以使用 RSA 算法。
2.4、准备工作：安装“jsencrypt”
2.4.1、使用npm进行安装
npm安装命令如下：
npm install jsencrypt
2.4.2、Visual Studio中安装
2.4.2.1、选择“客户端库”
2.4.2.2、安装下载“jsencrypt”
在“添加客户端库”界面：
- 提供程序：选择“unpkg”；
- 库：输入“jsencrypt@”，进行版本的选择；
- 可选择：1、包括所有库文件；2、选择特定文件；
确认无误之后，点击“安装”即可。
2.5、安装组件“BouncyCastle”
在菜单栏找到 工具 —> NuGet 包管理器 —> 管理解决方案的NuGet程序包 —> 浏览 —> 搜索 “BouncyCastle” —> 安装。
2.5.1、新建帮助类
2.5.1.1、添加C# RAS生成.NET公钥与私钥以及.NET公钥与私钥转Java公钥私钥类“RASKeyConversion”
可根据自己需求删除生成Java的
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.X509;
using System;
using System.Security.Cryptography;
using System.Xml;
namespace WebApplication1
{
/// <summary>
/// C# RAS生成.NET公钥与私钥以及.NET公钥与私钥转Java公钥私钥类
/// </summary>
public class RASKeyConversion
{
/// <summary>
/// 第一个：C# 私钥；第二个：C# 公钥；第三个：JAVA私钥；第四个：JAVA公钥
/// </summary>
private static string[] sKeys = new String[4];
/// <summary>
/// 生成公钥与私钥方法
/// </summary>
/// <returns>第一个：C# 私钥；第二个：C# 公钥；第三个：JAVA私钥；第四个：JAVA公钥</returns>
public static string[] createPulbicKey(int size = 1024)
{
try
{
//密钥格式要生成pkcs#1格式的 而不是pkcs#8格式的
using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(size))
{
//C# 私钥
sKeys[0] = rsa.ToXmlString(true);
//C# 公钥
sKeys[1] = rsa.ToXmlString(false);
//JAVA私钥
sKeys[2] = RSAPrivateKeyDotNet2Java(sKeys[0]);
//JAVA公钥
sKeys[3] = RSAPublicKeyDotNet2Java(sKeys[1]);
return sKeys;
}
}
catch (Exception)
{
return null;
}
}
/// <summary>
/// RSA私钥格式转换，.net->java
/// </summary>
/// <param name="privateKey">.net生成的私钥</param>
/// <returns></returns>
public static string RSAPrivateKeyDotNet2Java(string privateKey)
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(privateKey);
BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
BigInteger exp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
BigInteger d = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("D")[0].InnerText));
BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("P")[0].InnerText));
BigInteger q = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Q")[0].InnerText));
BigInteger dp = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DP")[0].InnerText));
BigInteger dq = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("DQ")[0].InnerText));
BigInteger qinv = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("InverseQ")[0].InnerText));
RsaPrivateCrtKeyParameters privateKeyParam = new RsaPrivateCrtKeyParameters(m, exp, d, p, q, dp, dq, qinv);
PrivateKeyInfo privateKeyInfo = PrivateKeyInfoFactory.CreatePrivateKeyInfo(privateKeyParam);
byte[] serializedPrivateBytes = privateKeyInfo.ToAsn1Object().GetEncoded();
return Convert.ToBase64String(serializedPrivateBytes);
}
/// <summary>
/// RSA公钥格式转换，.net->java
/// </summary>
/// <param name="publicKey">.net生成的公钥</param>
/// <returns></returns>
public static string RSAPublicKeyDotNet2Java(string publicKey)
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(publicKey);
BigInteger m = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Modulus")[0].InnerText));
BigInteger p = new BigInteger(1, Convert.FromBase64String(doc.DocumentElement.GetElementsByTagName("Exponent")[0].InnerText));
RsaKeyParameters pub = new RsaKeyParameters(false, m, p);
SubjectPublicKeyInfo publicKeyInfo = SubjectPublicKeyInfoFactory.CreateSubjectPublicKeyInfo(pub);
byte[] serializedPublicBytes = publicKeyInfo.ToAsn1Object().GetDerEncoded();
return Convert.ToBase64String(serializedPublicBytes);
}
}
}
2.5.1.2、添加RSA秘钥转换帮助类“RsaKeyConvert”
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Pkcs;
using Org.BouncyCastle.Security;
using System.Xml.Linq;
using Org.BouncyCastle.OpenSsl;
using Org.BouncyCastle.Math;
namespace WebApplication1 //命名空间依据自己的项目进行修改
{
/// <summary>
/// RSA秘钥转换帮助类
/// </summary>
public class RsaKeyConvert
{
#region 其他格式的RSA秘钥转XML格式秘钥
/// <summary>
/// pem格式的RSA公钥字符串转XML格式公钥 Public Key Convert pem->xml
/// </summary>
/// <param name="publicKey">公钥字符串</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public static string PublicKeyPemToXml(string publicKey)
{
publicKey = PublicKeyFormat(publicKey);
RsaKeyParameters rsaKeyParameters = new PemReader(new StringReader(publicKey)).ReadObject() as RsaKeyParameters;
if (rsaKeyParameters == null)
{
throw new Exception("Public key format is incorrect");
}
XElement xElement = new XElement((XName?)"RSAKeyValue");
XElement content = new XElement((XName?)"Modulus", Convert.ToBase64String(rsaKeyParameters.Modulus.ToByteArrayUnsigned()));
XElement content2 = new XElement((XName?)"Exponent", Convert.ToBase64String(rsaKeyParameters.Exponent.ToByteArrayUnsigned()));
xElement.Add(content);
xElement.Add(content2);
return xElement.ToString();
}
/// <summary>
/// Pkcs1格式私钥转成Xml Pkcs1->xml
/// </summary>
/// <param name="privateKey">Pkcs1格式私钥字符串</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public static string PrivateKeyPkcs1ToXml(string privateKey)
{
privateKey = Pkcs1PrivateKeyFormat(privateKey);
RsaPrivateCrtKeyParameters rsaPrivateCrtKeyParameters = (RsaPrivateCrtKeyParameters)PrivateKeyFactory.CreateKey(PrivateKeyInfoFactory.CreatePrivateKeyInfo(((new PemReader(new StringReader(privateKey)).ReadObject() as AsymmetricCipherKeyPair) ?? throw new Exception("Private key format is incorrect")).Private));
XElement xElement = new XElement((XName?)"RSAKeyValue");
XElement content = new XElement((XName?)"Modulus", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Modulus.ToByteArrayUnsigned()));
XElement content2 = new XElement((XName?)"Exponent", Convert.ToBase64String(rsaPrivateCrtKeyParameters.PublicExponent.ToByteArrayUnsigned()));
XElement content3 = new XElement((XName?)"P", Convert.ToBase64String(rsaPrivateCrtKeyParameters.P.ToByteArrayUnsigned()));
XElement content4 = new XElement((XName?)"Q", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Q.ToByteArrayUnsigned()));
XElement content5 = new XElement((XName?)"DP", Convert.ToBase64String(rsaPrivateCrtKeyParameters.DP.ToByteArrayUnsigned()));
XElement content6 = new XElement((XName?)"DQ", Convert.ToBase64String(rsaPrivateCrtKeyParameters.DQ.ToByteArrayUnsigned()));
XElement content7 = new XElement((XName?)"InverseQ", Convert.ToBase64String(rsaPrivateCrtKeyParameters.QInv.ToByteArrayUnsigned()));
XElement content8 = new XElement((XName?)"D", Convert.ToBase64String(rsaPrivateCrtKeyParameters.Exponent.ToByteArrayUnsigned()));
xElement.Add(content);
xElement.Add(content2);
xElement.Add(content3);
xElement.Add(content4);
xElement.Add(content5);
xElement.Add(content6);
xElement.Add(content7);
xElement.Add(content8);
return xElement.ToString();
}
/// <summary>
/// 格式化公钥字符串
/// </summary>
/// <param name="str">公钥字符串</param>
/// <returns></returns>
public static string PublicKeyFormat(string str)
{
if (str.StartsWith("-----BEGIN PUBLIC KEY-----"))
{
return str;
}
List<string> list = new List<string>();
list.Add("-----BEGIN PUBLIC KEY-----");
int num;
for (int i = 0; i < str.Length; i += num)
{
num = ((str.Length - i < 64) ? (str.Length - i) : 64);
list.Add(str.Substring(i, num));
}
list.Add("-----END PUBLIC KEY-----");
return string.Join(Environment.NewLine, list);
}
/// <summary>
/// 格式化Pkcs1私钥
/// </summary>
/// <param name="str">私钥字符串</param>
/// <returns></returns>
public static string Pkcs1PrivateKeyFormat(string str)
{
if (str.StartsWith("-----BEGIN RSA PRIVATE KEY-----"))
{
return str;
}
List<string> list = new List<string>();
list.Add("-----BEGIN RSA PRIVATE KEY-----");
int num;
for (int i = 0; i < str.Length; i += num)
{
num = ((str.Length - i < 64) ? (str.Length - i) : 64);
list.Add(str.Substring(i, num));
}
list.Add("-----END RSA PRIVATE KEY-----");
return string.Join(Environment.NewLine, list);
}
#endregion
#region Xml格式的RSA秘钥转格式
/// <summary>
/// RSA公钥格式转换：Xml格式的公钥转Pem格式的公钥 xml->pem
/// </summary>
/// <param name="publicKey">Xml公钥字符串</param>
/// <returns></returns>
public static string PublicKeyXmlToPem(string publicKey)
{
XElement xElement = XElement.Parse(publicKey);
XElement xElement2 = xElement.Element((XName?)"Modulus");
XElement xElement3 = xElement.Element((XName?)"Exponent");
RsaKeyParameters obj = new RsaKeyParameters(isPrivate: false, new BigInteger(1, Convert.FromBase64String(xElement2.Value)), new BigInteger(1, Convert.FromBase64String(xElement3.Value)));
StringWriter stringWriter = new StringWriter();
PemWriter pemWriter = new PemWriter(stringWriter);
pemWriter.WriteObject(obj);
pemWriter.Writer.Close();
return stringWriter.ToString();
}
/// <summary>
/// RSA私钥格式转换：Xml格式的私钥转Pkcs1格式的私钥 xml->Pkcs1
/// </summary>
/// <param name="privateKey">Xml私钥字符串</param>
/// <returns></returns>
public static string PrivateKeyXmlToPkcs1(string privateKey)
{
XElement xElement = XElement.Parse(privateKey);
XElement xElement2 = xElement.Element((XName?)"Modulus");
XElement xElement3 = xElement.Element((XName?)"Exponent");
XElement xElement4 = xElement.Element((XName?)"P");
XElement xElement5 = xElement.Element((XName?)"Q");
XElement xElement6 = xElement.Element((XName?)"DP");
XElement xElement7 = xElement.Element((XName?)"DQ");
XElement xElement8 = xElement.Element((XName?)"InverseQ");
XElement xElement9 = xElement.Element((XName?)"D");
RsaPrivateCrtKeyParameters obj = new RsaPrivateCrtKeyParameters(new BigInteger(1, Convert.FromBase64String(xElement2.Value)), new BigInteger(1, Convert.FromBase64String(xElement3.Value)), new BigInteger(1, Convert.FromBase64String(xElement9.Value)), new BigInteger(1, Convert.FromBase64String(xElement4.Value)), new BigInteger(1, Convert.FromBase64String(xElement5.Value)), new BigInteger(1, Convert.FromBase64String(xElement6.Value)), new BigInteger(1, Convert.FromBase64String(xElement7.Value)), new BigInteger(1, Convert.FromBase64String(xElement8.Value)));
StringWriter stringWriter = new StringWriter();
PemWriter pemWriter = new PemWriter(stringWriter);
pemWriter.WriteObject(obj);
pemWriter.Writer.Close();
return stringWriter.ToString();
}
#endregion
}
}
2.5.1.3、添加RSA加密帮助类“RSACrypto”
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
namespace WebApplication1 //命名空间依据自己的项目进行修改
{
/// <summary>
/// RSA加密帮助类
/// </summary>
public class RSACrypto
{
/// <summary>
/// 默认的私钥
/// </summary>
private const string defaultprivateKey = @"MIICXAIBAAKBgQCC0hrRIjb3noDWNtbDpANbjt5Iwu2NFeDwU16Ec87ToqeoIm2KI+cOs81JP9aTDk/jkAlU97mN8wZkEMDr5utAZtMVht7GLX33Wx9XjqxUsDfsGkqNL8dXJklWDu9Zh80Ui2Ug+340d5dZtKtd+nv09QZqGjdnSp9PTfFDBY133QIDAQABAoGAJBNTOITaP6LCyKVKyEdnHaKNAz0DS+V9UwjKhyAgfcAxwm3sDdd6FQCEW0TIJA7Np7rFYrGwcR1UOoKxkNxB10ACl6JX4rE7xKS6NLZumdwxON/KgDb+2SQtWEXDgBySZ7Znv/FhEp1RmoBDjZ05E99kILWO3ToorUM0Eq2GHQkCQQCnUMXgZa4HS0tu
INzysgB37d7ene9+CIARyJphs079qao2UWCgXqen43Ob6GJUgulz7We+4JOZFld0TfEi1E5rAkEAyClQAVzafLO3gXgqH7tbRbPPx788+4opxT9QBo2Trzl6/3FlcC1PIZeqbQ/Oc2wT7jmidFnpyTEnM2p7Yq3U1wJBAILTWaX4W3dAnJ5j+9+Y51zfFiEjhRwbMWi2XmB+gAlAHOOUBeXfnWBdLQx/TEOgiUIoI7LQjxhoq8E5II+HSjkCQDlKSdH6B7dFoTJ3eGcYsykiLEiZ3hSJGSeR1Y/qmei/ZQsUI9qVvV56EJeivI6g0puO94ah7Z5eaT/4LFS0OIUCQDgLn586pGgeidLhQsIe/AR3y9YOCAygTFLxzmeBXOKtM90q4516KWlTtK2u99442mNi7hNmjryBVwk62foWo8w=";
/// <summary>
/// 默认公钥
/// </summary>
private const string defaultpublicKey = @"MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCC0hrRIjb3noDWNtbDpANbjt5Iwu2NFeDwU16Ec87ToqeoIm2KI+cOs81JP9aTDk/jkAlU97mN8wZkEMDr5utAZtMVht7GLX33Wx9XjqxUsDfsGkqNL8dXJklWDu9Zh80Ui2Ug+340d5dZtKtd+nv09QZqGjdnSp9PTfFDBY133QIDAQAB";
private RSACryptoServiceProvider _privateKeyRsaProvider;
private RSACryptoServiceProvider _publicKeyRsaProvider;
/// <summary>
/// RSA加密帮助类构造函数
/// </summary>
/// <param name="privateKey">RSA解密密匙</param>
/// <param name="publicKey">RSA加密密匙</param>
public RSACrypto(string privateKey = "", string publicKey = "")
{
//判断私钥密匙是否为空，为空，使用默认的私钥；
if (string.IsNullOrEmpty(privateKey))
{
privateKey = defaultprivateKey;
}
//判断公钥密匙是否为空，为空，使用默认的公钥；
if (string.IsNullOrEmpty(publicKey))
{
publicKey = defaultpublicKey;
}
//不为空：使用定义的私钥密匙创建
if (!string.IsNullOrEmpty(privateKey))
{
_privateKeyRsaProvider = CreateRsaProviderFromPrivateKey(privateKey);
}
//不为空：使用定义的公钥密匙创建
if (!string.IsNullOrEmpty(publicKey))
{
_publicKeyRsaProvider = CreateRsaProviderFromPublicKey(publicKey);
}
}
public string GetPublicRsaKeyStr(string publicKey)
{
string keyStr = "";
CreateRsaProviderFromPublicKey(publicKey);
return keyStr;
}
/// <summary>
/// RSA解密
/// </summary>
/// <param name="cipherText">解密的密文字符串</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public string RSADecrypt(string cipherText)
{
if (_privateKeyRsaProvider == null)
{
throw new Exception("提供的RSA私钥为空");
}
if (string.IsNullOrEmpty(cipherText))
{
return "";
}
return Encoding.UTF8.GetString(_privateKeyRsaProvider.Decrypt(System.Convert.FromBase64String(cipherText), false));
}
/// <summary>
/// RSA解密
/// </summary>
/// <param name="cipherText">需要解密的密文字符串</param>
/// <param name="publicKeyString">私钥</param>
/// <param name="keyType">密钥类型XML/PEM</param>
/// <returns></returns>
public static string RSADecrypt(string cipherText, string privateKeyString, string keyType, int size = 1024)
{
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(size);
switch (keyType)
{
case "XML":
rsa.FromXmlString(privateKeyString);
break;
case "PEM":
break;
default:
throw new Exception("不支持的密钥类型");
}
int MaxBlockSize = rsa.KeySize / 8; //解密块最大长度限制
//正常解密
if (cipherText.Length <= MaxBlockSize)
{
byte[] hashvalueDcy = rsa.Decrypt(System.Convert.FromBase64String(cipherText), false);//解密
return Encoding.GetEncoding("UTF-8").GetString(hashvalueDcy);
}
//分段解密
else
{
using (MemoryStream CrypStream = new MemoryStream(System.Convert.FromBase64String(cipherText)))
{
using (MemoryStream PlaiStream = new MemoryStream())
{
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);
while (BlockSize > 0)
{
Byte[] ToDecrypt = new Byte[BlockSize];
Array.Copy(Buffer, 0, ToDecrypt, 0, BlockSize);
Byte[] Plaintext = rsa.Decrypt(ToDecrypt, false);
PlaiStream.Write(Plaintext, 0, Plaintext.Length);
BlockSize = CrypStream.Read(Buffer, 0, MaxBlockSize);
}
string output = Encoding.GetEncoding("UTF-8").GetString(PlaiStream.ToArray());
return output;
}
}
}
}
/// <summary>
/// RSA加密
/// </summary>
/// <param name="text">需要进行加密的明文字符串</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
public string RSAEncrypt(string text)
{
if (_publicKeyRsaProvider == null)
{
throw new Exception("提供的RSA公钥为空");
}
return Convert.ToBase64String(_publicKeyRsaProvider.Encrypt(Encoding.UTF8.GetBytes(text), false));
}
/// <summary>
/// RSA加密
/// </summary>
/// <param name="clearText">需要加密的明文字符串</param>
/// <param name="publicKeyString">公钥</param>
/// <param name="keyType">密钥类型XML/PEM</param>
/// <returns></returns>
public static string RSAEncrypt(string clearText, string publicKeyString, string keyType, int size = 1024)
{
byte[] data = Encoding.GetEncoding("UTF-8").GetBytes(clearText);
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(size);
switch (keyType)
{
case "XML":
rsa.FromXmlString(publicKeyString);
break;
case "PEM":
break;
default:
throw new Exception("不支持的密钥类型");
}
//加密块最大长度限制，如果加密数据的长度超过 秘钥长度/8-11，会引发长度不正确的异常，所以进行数据的分块加密
int MaxBlockSize = rsa.KeySize / 8 - 11;
//正常长度
if (data.Length <= MaxBlockSize)
{
byte[] hashvalueEcy = rsa.Encrypt(data, false); //加密
return System.Convert.ToBase64String(hashvalueEcy);
}
//长度超过正常值
else
{
using (MemoryStream PlaiStream = new MemoryStream(data))
using (MemoryStream CrypStream = new MemoryStream())
{
Byte[] Buffer = new Byte[MaxBlockSize];
int BlockSize = PlaiStream.Read(Buffer, 0, MaxBlockSize);
while (BlockSize > 0)
{
Byte[] ToEncrypt = new Byte[BlockSize];
Array.Copy(Buffer, 0, ToEncrypt, 0, BlockSize);
Byte[] Cryptograph = rsa.Encrypt(ToEncrypt, false);
CrypStream.Write(Cryptograph, 0, Cryptograph.Length);
BlockSize = PlaiStream.Read(Buffer, 0, MaxBlockSize);
}
return System.Convert.ToBase64String(CrypStream.ToArray(), Base64FormattingOptions.None);
}
}
}
/// <summary>
/// 通过提供的RSA私钥来创建RSA
/// </summary>
/// <param name="privateKey">私钥字符串</param>
/// <returns></returns>
/// <exception cref="Exception"></exception>
private RSACryptoServiceProvider CreateRsaProviderFromPrivateKey(string privateKey)
{
byte[] privateKeyBits = System.Convert.FromBase64String(privateKey);
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters 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;
}
/// <summary>
/// 获取整数大小
/// </summary>
/// <param name="binr"></param>
/// <returns></returns>
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;
}
/// <summary>
/// 通过提供的RSA公钥来创建RSA
/// </summary>
/// <param name="publicKeyString">公钥字符串</param>
/// <returns></returns>
private RSACryptoServiceProvider CreateRsaProviderFromPublicKey(string publicKeyString)
{
// encoded OID sequence for PKCS #1 rsaEncryption szOID_RSA_RSA = "1.2.840.113549.1.1.1"
byte[] SeqOID = { 0x30, 0x0D, 0x06, 0x09, 0x2A, 0x86, 0x48, 0x86, 0xF7, 0x0D, 0x01, 0x01, 0x01, 0x05, 0x00 };
byte[] x509key;
byte[] seq = new byte[15];
int x509size;
x509key = Convert.FromBase64String(publicKeyString);
x509size = x509key.Length;
// --------- Set up stream to read the asn.1 encoded SubjectPublicKeyInfo blob ------
using (MemoryStream mem = new MemoryStream(x509key))
{
using (BinaryReader binr = new BinaryReader(mem)) //wrap Memory Stream with BinaryReader for easy reading
{
byte bt = 0;
ushort twobytes = 0;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
seq = binr.ReadBytes(15); //read the Sequence OID
if (!CompareBytearrays(seq, SeqOID)) //make sure Sequence for OID is correct
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8103) //data read as little endian order (actual data order for Bit String is 03 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8203)
binr.ReadInt16(); //advance 2 bytes
else
return null;
bt = binr.ReadByte();
if (bt != 0x00) //expect null byte next
return null;
twobytes = binr.ReadUInt16();
if (twobytes == 0x8130) //data read as little endian order (actual data order for Sequence is 30 81)
binr.ReadByte(); //advance 1 byte
else if (twobytes == 0x8230)
binr.ReadInt16(); //advance 2 bytes
else
return null;
twobytes = binr.ReadUInt16();
byte lowbyte = 0x00;
byte highbyte = 0x00;
if (twobytes == 0x8102) //data read as little endian order (actual data order for Integer is 02 81)
lowbyte = binr.ReadByte(); // read next bytes which is bytes in modulus
else if (twobytes == 0x8202)
{
highbyte = binr.ReadByte(); //advance 2 bytes
lowbyte = binr.ReadByte();
}
else
return null;
byte[] modint = { lowbyte, highbyte, 0x00, 0x00 }; //reverse byte order since asn.1 key uses big endian order
int modsize = BitConverter.ToInt32(modint, 0);
int firstbyte = binr.PeekChar();
if (firstbyte == 0x00)
{ //if first byte (highest order) of modulus is zero, don't include it
binr.ReadByte(); //skip this null byte
modsize -= 1; //reduce modulus buffer size by 1
}
byte[] modulus = binr.ReadBytes(modsize); //读取模量字节
if (binr.ReadByte() != 0x02) //期望指数数据为Integer
return null;
int expbytes = (int)binr.ReadByte(); // should only need one byte for actual exponent data (for all useful values)
byte[] exponent = binr.ReadBytes(expbytes);
// ------- create RSACryptoServiceProvider instance and initialize with public key -----
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
RSAParameters RSAKeyInfo = new RSAParameters();
RSAKeyInfo.Modulus = modulus;
RSAKeyInfo.Exponent = exponent;
RSA.ImportParameters(RSAKeyInfo);
return RSA;
}
}
}
/// <summary>
/// 比较字节数组
/// </summary>
/// <param name="a"></param>
/// <param name="b"></param>
/// <returns></returns>
private bool CompareBytearrays(byte[] a, byte[] b)
{
if (a.Length != b.Length)
{
return false;
}
int i = 0;
foreach (byte c in a)
{
if (c != b[i])
{
return false;
}
i++;
}
return true;
}
}
}
2.6、.NET 控制器后端代码
2.6.1、视图控制图代码
public IActionResult worddata()
{
var dataStr = RASKeyConversion.createPulbicKey();
publicKey = RsaKeyConvert1.PublicKeyXmlToPem(dataStr[1]);
privateKey = RsaKeyConvert1.PrivateKeyXmlToPkcs1(dataStr[0]);
ViewBag.publicKey = publicKey;
ViewBag.privateKey = privateKey;
return View();
}
2.6.2、POST请求接口代码
/// <summary>
/// 解密接口
/// </summary>
/// <param name="pwd"></param>
/// <param name="privateKey">私钥</param>
/// <returns></returns>
[HttpPost]
public IActionResult wordEncrypt(string pwd, string privateKey)
{
string resPwd = "";
try
{
string privateStr= RsaKeyConvert1.PrivateKeyPkcs1ToXml(privateKey);
resPwd = RSACrypto.RSADecrypt(pwd,privateStr,"XML");
return Json(new { code = 200, msg = resPwd });
}
catch (Exception ex)
{
return Json(new { code = 220, msg = "RSA解密时出现错误！！！" });
}
}
2.7、前端视图页面代码
2.7.1、Html代码
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>sometext</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<script src="/lib/jquery/dist/jquery.js"></script>
<script src="/lib/layui/dist/layui.js"></script>
<script src="/lib/jsencrypt/bin/jsencrypt.js"></script>
<script src="/lib/bootstrap/dist/js/bootstrap.js"></script>
<link href="/lib/layui/dist/css/layui.css" rel="stylesheet" />
<link href="/lib/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />
<style type="text/css"></style>
</head>
<body>
<div class="wrapper">
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">脱敏/加密前的内容：</span>
</div>
<input type="password" class="form-control" id="sourctText" placeholder="脱敏/加密前的内容" aria-label="sourctText" aria-describedby="basic-addon1">
</div>
<br />
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">加密后的内容：</span>
</div>
<input type="text" class="form-control" id="encryptText" placeholder="加密后的内容" readonly="readonly" aria-label="encryptText" aria-describedby="basic-addon1">
</div>
<input type="hidden" value="@ViewBag.publicKey" id="publicKey" readonly="readonly" />
<input type="hidden" value="@ViewBag.privateKey" id="privateKey" readonly="readonly" />
<br />
<div class="input-group mb-3">
<div class="input-group-prepend">
<span class="input-group-text" id="basic-addon1">脱敏/加密后的内容：</span>
</div>
<input type="text" class="form-control" id="resText" placeholder="脱敏/加密后的内容" readonly="readonly" aria-label="resText" aria-describedby="basic-addon1">
</div>
<div class="input-group mb-3">
<button id="submit" type="button" class="btn btn-primary btn-lg btn-block">提交</button>
</div>
</div>
</body>
</html>
2.7.2、javascript代码
<script type="text/javascript">
const encryptor = new JSEncrypt()
layui.use(['form'], function () {
let form = layui.form;
$("#submit").on("click", function () {
let publicKey = $("#publicKey").val();
let privateKey = $("#privateKey").val();
let sourctText = $("#sourctText").val();
if (sourctText != "" && sourctText != null) {
encryptor.setPublicKey(publicKey) // 设置公钥
let cipherText = encryptor.encrypt(sourctText);
$("#encryptText").val(cipherText);
login(cipherText, publicKey, privateKey);
} else {
layui.layer.alert("密码为空！", { icon: 5, title: "温馨提示", closeBtn: 0 });
}
});
function login(sourctText, publicKey, privateKey) {
var wordEncrypt= $.ajax({
url: "/Home/wordEncrypt",//请求后端接口的路径
dataType: "JSON",
type: "POST",
data: {
"pwd": sourctText,
//"publicKey": publicKey,
"privateKey": privateKey
},
success: function (res) {
let resCode = res.code;
let resMsg = res.msg;
if ((resCode == "210" || resCode == 210) || (resCode == 220 || resCode == "220") || (resCode == 230 || resCode == "230") || (resCode == 240 || resCode == "240") || (resCode == 260 || resCode == "260")) {
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
wordEncrypt.abort(); // 删除 AJAX 请求
}, 2000);
layui.layer.alert(resMsg, { icon: 5, title: "温馨提示", closeBtn: 0 });
} else if (resCode == 200 || resCode == "200") {
$("#resText").val(resMsg);
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
wordEncrypt.abort(); // 删除 AJAX 请求
}, 2000);
}
},
error: function (error) {
//返回数据后关闭loading
layer.closeAll();
// 在 2 秒钟后取消 AJAX 请求
setTimeout(function () {
wordEncrypt.abort(); // 删除 AJAX 请求
}, 2000);
layui.layer.alert(error, { icon: 5, title: "温馨提示", closeBtn: 0 });
}
});
}
});
</script>