// Create an RSAPKCS1KeyExchangeDeformatter object with a new RSA key.
// Display its properties to the console.
public void ConstructDeformatter()
{
// Construct an empty OAEP key exchange.
RSAPKCS1KeyExchangeDeformatter rsaDeformatter =
new RSAPKCS1KeyExchangeDeformatter();
// Create an RSAKey and set it into the specified
// RSAPKCS1KeyExchangeFormatter.
RSA key = RSA.Create();
rsaDeformatter.SetKey(key);
RNGCryptoServiceProvider ring = new RNGCryptoServiceProvider();
rsaDeformatter.RNG = ring;
Console.WriteLine();
Console.WriteLine("**" + rsaDeformatter.ToString() + "**");
string xmlParameters = rsaDeformatter.Parameters;
Console.WriteLine();
Console.WriteLine("The RSA deformatter has the following ");
Console.WriteLine("parameters:" + xmlParameters);
}
public void Properties()
{
RSAPKCS1KeyExchangeDeformatter keyex = new RSAPKCS1KeyExchangeDeformatter();
keyex.SetKey(key);
Assert.IsNull(keyex.Parameters, "RSAPKCS1KeyExchangeDeformatter.Parameters");
// null (default)
Assert.IsNull(keyex.RNG, "RSAPKCS1KeyExchangeDeformatter.RNG");
Assert.AreEqual("System.Security.Cryptography.RSAPKCS1KeyExchangeDeformatter", keyex.ToString());
}
/// <summary>
/// Decrypts the target key with the CryptoManager's private RSA key. It is assumbed that the
/// @rijKey was previously encrypted with the CryptoManager's public key.
/// </summary>
/// <param name="rijKey"></param>
/// <returns></returns>
public byte[] DecryptRijndaelKey(byte[] rijKey)
{
byte[] key = new byte[0];
lock (this)
{
//m_RSA.ImportCspBlob(m_PrivateKey);
m_RSA.FromXmlString(Encoding.UTF8.GetString(m_PrivateKey));
m_RSA_Exch_Def.SetKey(m_RSA);
key = m_RSA_Exch_Def.DecryptKeyExchange(rijKey);
}
return(key);
}