string DESEncrypt(string data)
{
DESCryptoServiceProvider DESalg = new DESCryptoServiceProvider();
byte[] EncryptedData = MyDES.EncryptTextToMemory(data, DESalg.Key, DESalg.IV);
byte[] RSAKey = RSA.RSAEncrypt(DESalg.Key, rsaServer.ExportParameters(false), false);
return(Convert.ToBase64String(DESalg.IV) + "*" + Convert.ToBase64String(RSAKey) + "*" + Convert.ToBase64String(EncryptedData));
}
private string ReceiveDataFromServer()
{
byte[] data = new byte[2048];
int recv_data = server.Receive(data);
string stringData = Encoding.ASCII.GetString(data, 0, recv_data);
byte[] EncryptedData;
byte[] IV;
byte[] key;
string[] stringDataList = stringData.Split('*');
IV = Convert.FromBase64String(stringDataList[0]);
key = Convert.FromBase64String(stringDataList[1]);
EncryptedData = Convert.FromBase64String(stringDataList[2]);
stringData = MyDES.DecryptTextFromMemory(EncryptedData, key, IV);
receivedData = stringData;
return(stringData);
}
