C# javascript 采用 RSA 加密解密

1.C#提供公钥

2.javascript用公钥加密

3.C#用私钥解密

    <script src="pidcrypt.js"></script>
    <script src="pidcrypt_util.js"></script>
    <script src="asn1.js"></script>
    <script src="jsbn.js"></script>
    <script src="rng.js"></script>
    <script src="prng4.js"></script>
    <script src="rsa.js"></script>
    <script type="text/javascript">
        function submit1() {
            var input = document.getElementById("txtPwd").value;
            //var n_str = "kaYjgFd9yA68TbFH/E57B3QeO4Ch0+7jFil4HfGqVfACKbUIybBcHuifVKUSYxrdfKQ+cIHPmMq0JpXnOX2Y5AZs7mVUWWlFFu35Rjc4oiKrd0z95opjPp8s6WYIgtr3BDs3ja0W7cCl5xIrDD/5SF4IM9ui9uqy9iHGSG57XRs=";
            //var e_str = "AQAB";
            var n_str = document.getElementById("txtN").value;
            var e_str = document.getElementById("txtE").value;
            var n = pidCryptUtil.convertToHex(pidCryptUtil.decodeBase64(n_str));
            var e = pidCryptUtil.convertToHex(pidCryptUtil.decodeBase64(e_str));

            var rsa = new pidCrypt.RSA();
            rsa.setPublic(n, e, 16);
            crypted = rsa.encrypt(input);
            var result = pidCryptUtil.encodeBase64(pidCryptUtil.convertFromHex(crypted));
            document.getElementById("txtPwd").value = result;
        }
    </script>

        protected void Page_Load(object sender, EventArgs e)
        {
            InitRSA();
        }

        private void InitRSA()
        {
            if (Session["RSA"] == null)
            {
                RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
                Session["RSA"] = rsa.ToXmlString(true);
                txtE.Text = Convert.ToBase64String(rsa.ExportParameters(false).Exponent);
                txtN.Text = Convert.ToBase64String(rsa.ExportParameters(false).Modulus);
            }
        }



        protected void Button1_Click(object sender, EventArgs e)
        {
            var pwd = txtPwd.Text;
            RSACryptoServiceProvider rsa = new RSACryptoServiceProvider();
            //rsa.FromXmlString("<RSAKeyValue><Modulus>kaYjgFd9yA68TbFH/E57B3QeO4Ch0+7jFil4HfGqVfACKbUIybBcHuifVKUSYxrdfKQ+cIHPmMq0JpXnOX2Y5AZs7mVUWWlFFu35Rjc4oiKrd0z95opjPp8s6WYIgtr3BDs3ja0W7cCl5xIrDD/5SF4IM9ui9uqy9iHGSG57XRs=</Modulus><Exponent>AQAB</Exponent><P>ywkLeqqcXpAgx1aaadnFDDDTgjNEnqv0PYlNNMgJ30IHGb+YtOediosMKrM3YZbSRoYrVf9W0UPP0+k5c4VqZQ==</P><Q>t6TCzhVl1hCgwfYGgxOHxGQCsgLwgRLCm5f/RXRfBEvag2RmuiKm9yY6cOHEcrJD9fnFm3t0SJPruaFQhjFxfw==</Q><DP>KQIxrFwLa1onFLwcQib3EshF4DVktbu7gDZcPr3sqIhYkM3PFTL28gW1tmYuWGqzHAV7eUoyid/teTrRHNEktQ==</DP><DQ>PJlX1x1kf2D5S0feGj7FnF7MLOWfa1g/c4ySpd6ixA4ryxPEekOZCRFKU5mMc7SzjGWheY8hbhmxvY2nvsBuDQ==</DQ><InverseQ>dc/pyOJ7UxdUO4kj/bHv7n6PLiS7x6JhkmuXvlxvQb1td4jSVl2EaGROzc9W2SAXWFTa3N4G5KzUYF4CKwSp8A==</InverseQ><D>BQJfyjQ4IT9QfqOQRD82wATgXU+JQU7ABK0ccnszTo1YpbKSQM2N/YomoLSksz/jSjwj4Z61Ux31oDYbo8CMF45MboBNIcqvtDgoL+8kNCUEnjnJ9HIkgn7vO1BozqPRu90P8x5zNQbzRumNM7dgcfjxRMvk4cznHVanz18YuxE=</D></RSAKeyValue>");
            rsa.FromXmlString((string)Session["RSA"]);
            var bytes1 = Convert.FromBase64String(pwd);
            byte[] bytes2 = rsa.Decrypt(bytes1, false);
            var p = Encoding.Default.GetString(bytes2);
            bytes1 = Convert.FromBase64String(p);
            p = Encoding.Default.GetString(bytes1);
            TextBox1.Text = p;
            Session["RSA"] = null;
            InitRSA();
        }