Js参数RSA加密传输，jsencrypt.js的使用

来源：互联网发布：合肥美工培训编辑：程序博客网时间：2024/05/21 09:10

https://github.com/travist/jsencrypt

注意几点：

　　1、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="~/Scripts/jquery-1.10.2.min.js"></script>    <script src="http://passport.cnblogs.com/scripts/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">            MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCa4KHNwDX44gGmmIAtRu4gjVYtGWZzcm4t+1wjUD4dn7fMLPvuK7ai4UrfDeEJE1RPwudJw+lJ6crql8wSIg7/DbTl            G3ihsCT6dT9H5B9OoeR7K9VWUesaW/iyVL6HXiYOANabW14pvJATDmdq91Tfgp6P            SQyvdfiRdV4r07crpQIDAQAB        </textarea>        <hr/>        注意+好的处理    </div></body></html>

2、后端代码

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 = @"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";            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;        }    }

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