Convert RSA Key into readable or binary format - rsa

Question

I've been trying very hard to convert the rsa key into the binary or readable format using ASP.NET
and I went through a number of sites to sort out the problem
The key format I want is as below:
-----BEGIN PRIVATE KEY-----
BASE64 ENCODED DATA
-----END PRIVATE KEY-----
I have used the below code to create the key using RSA alogorithm. the key generated using the below code is in xml format but I want that in readable format or binary format.
Please help me.
Code Used is.
default.aspx.cs
using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _Default:System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{
Cryptography.AssignNewKey();
}
protected void Button2_Click(object sender, EventArgs e)
{
txt2.Text = Cryptography.EncryptData(txt1.Text);
}
protected void Button3_Click(object sender, EventArgs e)
{
txt3.Text = Cryptography.DecryptData(txt2.Text);
}
}
Class: Cryptography.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Security.Cryptography;
/// <summary>
/// Summary description for Cryptography
/// </summary>
public class Cryptography
{
public Cryptography()
{
//
// TODO: Add constructor logic here
//
}
public static RSACryptoServiceProvider rsa;
public static void AssignParameter()
{
const int PROVIDER_RSA_FULL = 1;
const string CONTAINER_NAME = "SpiderContainer";
CspParameters cspParams;
cspParams = new CspParameters(PROVIDER_RSA_FULL);
cspParams.KeyContainerName = CONTAINER_NAME;
cspParams.Flags = CspProviderFlags.UseMachineKeyStore;
cspParams.ProviderName = "Microsoft Strong Cryptographic Provider";
rsa = new RSACryptoServiceProvider(cspParams);
}
public static string EncryptData(string data2Encrypt)
{
AssignParameter();
//StreamReader reader = new StreamReader(#"C:\Inetpub\wwwroot\dotnetspiderencryption\publickey.xml");
StreamReader reader = new StreamReader("C:/keyscsharp/publickey.xml");
string publicOnlyKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicOnlyKeyXML);
reader.Close();
//read plaintext, encrypt it to ciphertext
byte[] plainbytes = System.Text.Encoding.UTF8.GetBytes(data2Encrypt);
byte[] cipherbytes = rsa.Encrypt(plainbytes, false);
return Convert.ToBase64String(cipherbytes);
}
public static void AssignNewKey()
{
AssignParameter();
//provide public and private RSA params
//StreamWriter writer = new StreamWriter(#"C:\Inetpub\wwwroot\dotnetspiderencryption\privatekey.xml");
StreamWriter writer = new StreamWriter("C:/keyscsharp/privatekey.xml");
string publicPrivateKeyXML = rsa.ToXmlString(true);
writer.Write(publicPrivateKeyXML);
writer.Close();
//provide public only RSA params
//writer = new StreamWriter(#"C:\Inetpub\wwwroot\dotnetspiderencryption\publickey.xml");
writer = new StreamWriter("C:/keyscsharp/publickey.xml");
string publicOnlyKeyXML = rsa.ToXmlString(false);
writer.Write(publicOnlyKeyXML);
writer.Close();
}
public static string DecryptData(string data2Decrypt)
{
AssignParameter();
byte[] getpassword = Convert.FromBase64String(data2Decrypt);
//StreamReader reader = new StreamReader(#"C:\Inetpub\wwwroot\dotnetspiderencryption\privatekey.xml");
StreamReader reader = new StreamReader("C:/keyscsharp/privatekey.xml");
string publicPrivateKeyXML = reader.ReadToEnd();
rsa.FromXmlString(publicPrivateKeyXML);
reader.Close();
//read ciphertext, decrypt it to plaintext
byte[] plain = rsa.Decrypt(getpassword, false);
return System.Text.Encoding.UTF8.GetString(plain);
}
}
Please Help me out.