Hello, I am trying to set p and q primes manually to get a steady public and prime key while encrypting and decrypting. Here is my code does both successfully, can you help me please?
namespace RSAEncryption
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
#region-----Encryptionand Decryption Function-----
static public byte[] Encryption(byte[] Data, RSAParameters RSAKey, bool DoOAEPPadding)
{
try
{
byte[] encryptedData;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(RSAKey);
encryptedData = RSA.Encrypt(Data, DoOAEPPadding);
}
return encryptedData;
}
catch (CryptographicException e)
{
Console.WriteLine(e.Message);
return null;
}
}
static public byte[] Decryption(byte[] Data, RSAParameters RSAKey, bool DoOAEPPadding)
{
try
{
byte[] decryptedData;
using (RSACryptoServiceProvider RSA = new RSACryptoServiceProvider())
{
RSA.ImportParameters(RSAKey);
decryptedData = RSA.Decrypt(Data, DoOAEPPadding);
}
return decryptedData;
}
catch (CryptographicException e)
{
Console.WriteLine(e.ToString());
return null;
}
}
#endregion
#region--variables area
UnicodeEncoding ByteConverter = new UnicodeEncoding();
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider();
byte[] plaintext;
byte[] encryptedtext;
#endregion
#region-- Function Implemantation
private void button1_Click(object sender, EventArgs e)
{
plaintext = ByteConverter.GetBytes(txtplain.Text);
encryptedtext = Encryption(plaintext, RSA.ExportParameters(false), false);
txtencrypt.Text = ByteConverter.GetString(encryptedtext);
}
private void button2_Click(object sender, EventArgs e)
{
byte[] decryptedtex = Decryption(encryptedtext, RSA.ExportParameters(true), false); //private key export
txtdecrypt.Text = ByteConverter.GetString(decryptedtex);
}
#endregion
}
}
