using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Windows.Input;
namespace EncryptedandDecrypted
{
public partial class EncryptedAndDecrypted : System.Web.UI.Page
{
public class EncryptionUtility
{
protected void Page_Load(object sender, EventArgs e)
{
//rijndaelCipher.Key = Convert.FromBase64String("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz012345678912");
//rijndaelCipher.IV = Convert.FromBase64String("1234567890123456789012345678901234567890123456789012345678901234");
}
}
protected void Button1_Click(object sender, EventArgs e)
{
try
{
string encrypted = Convert.ToString(TextBox1.Text);
TextBox2.Text = "";
string publickey = "santhosh";
string secretkey = "engineer";
RijndaelManaged aesAlg = null;
byte[] secretkeyByte = { };
secretkeyByte = System.Text.Encoding.UTF8.GetBytes(secretkey);
byte[] publickeybyte = { };
publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
MemoryStream ms = null;
CryptoStream cs = null;
byte[] inputbyteArray = System.Text.Encoding.UTF8.GetBytes(encrypted);
aesAlg = new RijndaelManaged();
RijndaelManaged aes = new RijndaelManaged();
aes.KeySize = 256;
aes.BlockSize = 256;
aes.Padding = PaddingMode.Zeros;
aes.Mode = CipherMode.CBC;
var toDecodeAsString = System.Convert.FromBase64String(encrypted);
string decodedValue = System.Text.ASCIIEncoding.ASCII.GetString(toDecodeAsString);
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (DESCryptoServiceProvider des = new DESCryptoServiceProvider())
{
RijndaelManaged AES = new RijndaelManaged();
AES.KeySize = 256;
AES.BlockSize = 128;
ms = new MemoryStream();
cs = new CryptoStream(ms, des.CreateEncryptor(publickeybyte, secretkeyByte), CryptoStreamMode.Write);
cs.Write(inputbyteArray, 0, inputbyteArray.Length);
cs.FlushFinalBlock();
TextBox2.Text = Convert.ToBase64String(ms.ToArray());
// TextBox2.Text = TextBox1.Text;
}
// TextBox1.Text = "";
}
catch (Exception ex)
{
throw new Exception(ex.Message, ex.InnerException);
}
}
protected void Button2_Click(object sender, EventArgs e)
{
try
{
string Decrypt = Convert.ToString(TextBox2.Text);
TextBox1.Text = "";
string publickey = "santhosh";
string privatekey = "engineer";
RijndaelManaged aesAlg = null;
byte[] privatekeyByte = { };
privatekeyByte = System.Text.Encoding.UTF8.GetBytes(privatekey);
byte[] publickeybyte = { };
publickeybyte = System.Text.Encoding.UTF8.GetBytes(publickey);
MemoryStream ms = null;
CryptoStream cs = null;
aesAlg = new RijndaelManaged();
RijndaelManaged aes = new RijndaelManaged();
aes.KeySize = 256;
aes.BlockSize = 256;
aes.Padding = PaddingMode.Zeros;
aes.Mode = CipherMode.CBC;
byte[] inputbyteArray = new byte[Decrypt.Replace(" ", "+").Length];
inputbyteArray = Convert.FromBase64String(Decrypt.Replace(" ", "+"));
using (DESCryptoServiceProvider DES = new DESCryptoServiceProvider())
{
ms = new MemoryStream();
cs = new CryptoStream(ms, DES.CreateDecryptor(publickeybyte, privatekeyByte), CryptoStreamMode.Write);
cs.Write(inputbyteArray, 0, inputbyteArray.Length);
cs.FlushFinalBlock();
Encoding encoding = Encoding.UTF8;
TextBox1.Text = encoding.GetString(ms.ToArray());
}
}
catch (Exception ae)
{
throw new Exception(ae.Message, ae.InnerException);
}
}
}
}
When I enter to Encrypted value in the TextBox when I Click On Decrypted buttion t is Chainging so My Requriment is when i Try to check theEncrypted data It Should not be change
