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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
复制代码 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" />
-
-
-
-
- <link href="/lib/layui/dist/css/layui.css" rel="stylesheet" />
- <link href="/lib/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />
-
- </head>
- <body>
-
-
-
- 脱敏/加密前的内容:
-
- <input type="password" id="sourctText" placeholder="脱敏/加密前的内容" aria-label="sourctText" aria-describedby="basic-addon1">
-
- <br />
-
-
- 加密后的内容:
-
- <input type="text" id="encryptText" placeholder="加密后的内容" readonly="readonly" aria-label="encryptText" aria-describedby="basic-addon1">
-
- <br />
-
-
- 脱敏/加密后的内容:
-
- <input type="text" id="resText" placeholder="脱敏/加密后的内容" readonly="readonly" aria-label="resText" aria-describedby="basic-addon1">
-
-
- <button id="submit" type="button" >提交</button>
-
-
- </body>
- </html>
复制代码 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。- [/code][size=5]1.6、.NET 后端代码[/size]
- [size=4]1.6.1、定义公共的密匙字段[/size]
- [code]/// <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";
复制代码 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);
- }
- }
复制代码 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!!!" });
- }
- }
复制代码 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: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);
- }
- }
- }
复制代码 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
- }
- }
复制代码 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;
- }
- }
- }
复制代码 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();
- }
复制代码 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!!!" });
- }
- }
复制代码 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" />
-
-
-
-
- <link href="/lib/layui/dist/css/layui.css" rel="stylesheet" />
- <link href="/lib/bootstrap/dist/css/bootstrap.css" rel="stylesheet" />
-
- </head>
- <body>
-
-
-
- 脱敏/加密前的内容:
-
- <input type="password" id="sourctText" placeholder="脱敏/加密前的内容" aria-label="sourctText" aria-describedby="basic-addon1">
-
- <br />
-
-
- 加密后的内容:
-
- <input type="text" id="encryptText" placeholder="加密后的内容" readonly="readonly" aria-label="encryptText" aria-describedby="basic-addon1">
-
- <input type="hidden" value="@ViewBag.publicKey" id="publicKey" readonly="readonly" />
- <input type="hidden" value="@ViewBag.privateKey" id="privateKey" readonly="readonly" />
- <br />
-
-
- 脱敏/加密后的内容:
-
- <input type="text" id="resText" placeholder="脱敏/加密后的内容" readonly="readonly" aria-label="resText" aria-describedby="basic-addon1">
-
-
- <button id="submit" type="button" >提交</button>
-
-
- </body>
- </html>
复制代码 2.7.2、javascript代码
[code][/code]
来源:https://www.cnblogs.com/lucasDC/archive/2023/09/17/17707813.html
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