RSA非对称性前端加密后端解密

时间：2023-03-08 16:46:26

前端加密代码

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>RSA非对称加密登录</title>

    <script src="~/JS/jquery-1.8.1.min.js"></script><script src="~/JS/RSA.js"></script>

    <script src="~/JS/BigInt.js"></script>

    <script src="~/JS/Barrett.js"></script>

    <script type="text/javascript">

        $(function () {

            index.init();

        });

        var index = function () {

            setMaxDigits(129);

            //第一个参数为加密指数、第二个参数为解密参数、第三个参数为加密系数

            var key_to_encode = new RSAKeyPair("010001", "", "A12A08F50D3B15E2BA7658C49A6CD068E3BB8AB439B8E5D125904F5C954AD7553CE712046182D299E3831516A2477578D86BA9D0C5C70D78FFCACCFD040C430A7B53729D517139B893DB7B228759D44BE5A3A5AE870287A2B5F165EE698EEAB9FEF345F82D27D789F0E5F79490AB324A4EDEE11A76A38FCB6E05F64335D2A60D");

            var _initEvent = function () {

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

                    submitData();

                });

            }

            function submitData() {

                var userName = $("#userName").val();

                var pwd = $("#pwd").val();

                pwd = encryptedString(key_to_encode, pwd)

                $.ajax({

                    url: "/Home/Login",

                    data: {

                        "userName": userName,

                        "pwd": pwd

                    },

                    datatype: "json",

                    type: "get",

                    success: function (json) {

                        $("#result").html("登录结果：" + json.result + "<br/>前端传入密码：" + json.InPwd + "<br/>后端解密后：" + json.OutPwd);

                    }

                });

            }

            return {

                init: function () {

                    _initEvent();

                }

            }

        }();

    </script>

</head>

<body>

    用户名：<input type="text" id="userName" value="张三" /><br /><br />

    密   码：<input type="text" id="pwd" value="12345677" /><br /><br />

    <input type="button" id="submit" value="提交" />

    <p id="result"></p>

</body>

</html>

后端登录处理和解密代码

        public ActionResult Login(string userName, string pwd)

        {

            string outPwd = RSADecrypts.RSADecrypt(pwd);

            if (outPwd == "" && userName == "张三")

            {

                return Json(new { result = "登录成功", InPwd = pwd, OutPwd = outPwd }, JsonRequestBehavior.AllowGet);

            }

            else

            {

                return Json(new { result = "用户名或密码不对", InPwd = pwd, OutPwd = outPwd }, JsonRequestBehavior.AllowGet);

            }

        }

  public static string RSADecrypt(string pToDecrypt)

        {

            string privateKey = "<RSAKeyValue><Modulus>oSoI9Q07FeK6dljEmmzQaOO7irQ5uOXRJZBPXJVK11U85xIEYYLSmeODFRaiR3V42Gup0MXHDXj/ysz9BAxDCntTcp1RcTm4k9t7IodZ1Evlo6WuhwKHorXxZe5pjuq5/vNF+C0n14nw5feUkKsySk7e4Rp2o4/LbgX2QzXSpg0=</Modulus><Exponent>AQAB</Exponent><P>0nRJAznZ9iAUkCkW//b9sQ5KquqRqqTe8/jp2ZAkCXuGz7WNCMQsSX/doJY0Dfum5MDeq0Y4ShB/LRSWhrKSrw==</P><Q>xArz6MLHAHOY7z76pA5o10mERKp7z4yhm/wFa9ghgy3Q3bQAfotRsLbT16ELmXqFi1Wo0Z2CprtZpVMsaGdyAw==</Q><DP>n0/t8WY6zCmOx26DfbKwavbBqU62hHIYYKG+DLcjwJXlAJmTsN4oFF+aGzV5JFirByHFrewTMmX4j9y08jR9+w==</DP><DQ>XDg+xrahgE/gmGLK6tOwc92sb9S2y0p/V241aqbQFPI/d5tORDjrY7KNcrjaSQd+vK297WUn6aDmKcQ3dqF62w==</DQ><InverseQ>N1WISfI5sfIovGeRCpTjz0kGfCuqURyjU+MxCD+xmCCgDcNKmSiDaUzKprnoCZbFd5IvSYGFSpPSdtpQ3qcVRw==</InverseQ><D>HgwCuIE7e1SWk/rvyKSx5GRU8kKwok7ChADYMvgoiGX9YU1EINPtpMA8j6F1JuJ5YcwM0H4XIuVktzApmegZVV6oS8xgdiWWixYufc8MThyP5FEBBd4LxPkVDSBsO3v8mdsWAZIi+Gup+SCnyrNqDp2a984/dfwyxWPj1PmacYc=</D></RSAKeyValue>";

            CspParameters cspParameters = new CspParameters();

            cspParameters.KeyContainerName = "containerName";

            cspParameters.KeyNumber = ;

            cspParameters.Flags = CspProviderFlags.UseMachineKeyStore;

            using (RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cspParameters))

            {

                rsa.FromXmlString(privateKey);

                byte[] result = rsa.Decrypt(HexStringToBytes(pToDecrypt), false);

                System.Text.ASCIIEncoding enc = new ASCIIEncoding();

                return enc.GetString(result);

            }

        }

        private static byte[] HexStringToBytes(string hex)

        {

            if (hex.Length == )

            {

                return new byte[] {  };

            }

            if (hex.Length %  == )

            {

                hex = "" + hex;

            }

            byte[] result = new byte[hex.Length / ];

            for (int i = ; i < hex.Length / ; i++)

            {

                result[i] = byte.Parse(hex.Substring( * i, ), System.Globalization.NumberStyles.AllowHexSpecifier);

            }

            return result;

        }

生成公钥私钥代码

 private static string BytesToHexString(byte[] input)

        {

            StringBuilder hexString = new StringBuilder();

            for (int i = ; i < input.Length; i++)

            {

                hexString.Append(String.Format("{0:X2}", input[i]));

            }

            return hexString.ToString();

        }

        public static void CreateKey(out string publicKey, out string privateKey)

        {

            RSACryptoServiceProvider rsaProvider = new RSACryptoServiceProvider();

            RSAParameters parameter = rsaProvider.ExportParameters(false);

            publicKey = BytesToHexString(parameter.Exponent) + "," + BytesToHexString(parameter.Modulus);

            //    publicKeyXML = rsa.ToXmlString(true);

            privateKey = rsaProvider.ToXmlString(true);

        }

    }

注：RSA只是非对称加密算法的一种，在非对称加密中使用的主要算法有：RSA、Elgamal、背包算法、Rabin、D-H、ECC（椭圆曲线加密算法）等，对称加密算法中常用的算法有：DES、3DES、TDEA、Blowfish、RC2、RC4、RC5、IDEA、SKIPJACK、AES等

附Demo地址：http://download.****.net/detail/fcydxbd/9724553

参考地址：http://blog.****.net/dslinmy/article/details/37362661

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