static string SendMessage(NetworkTCPClient client, string message)
{
byte[] messageBytes = Encoding.ASCII.GetBytes(message);
byte[] encrypted = aes.Encrypt(messageBytes);
return(client.SendMessageGetResponse(encrypted));
}
static void Main(string[] args)
{
NetworkTCPClient client = new NetworkTCPClient();
SendKey(client);
SendIV(client);
while (true)
{
Console.WriteLine("Enter message to send. If no message is entered, the client will shut down...");
string message = Console.ReadLine();
if (string.IsNullOrEmpty(message))
{
Console.WriteLine("No message entered, shutting down...");
Console.ReadKey();
Environment.Exit(0);
}
Console.WriteLine("Press enter to send the message...");
Console.ReadKey();
Console.WriteLine("Response received: " + SendMessage(client, message));
client.Disconnect();
}
}
static void SendIV(NetworkTCPClient client)
{
Console.WriteLine("AES initialized with default IV: " + Convert.ToBase64String(aes.Alg.Key) + "\nEncrypting IV....");
byte[] encrypted = rsaxml.Encrypt(aes.Alg.IV);
byte[] decrypted = rsaxml.Decrypt(encrypted);
Console.WriteLine("Sending encrypted IV to server: " + Convert.ToBase64String(encrypted));
client.SendMessage(new byte[] { 12 });
client.SendMessage(encrypted);
}
static void SendKey(NetworkTCPClient client)
{
Console.WriteLine("MODULUS: \n" + Convert.ToBase64String(rsaxml.Modulus) + "\n");
Console.WriteLine("AES initialized with default key: " + Convert.ToBase64String(aes.Alg.Key) + "\nEncrypting key....");
byte[] encrypted = rsaxml.Encrypt(aes.Alg.Key);
byte[] decrypted = rsaxml.Decrypt(encrypted);
Console.WriteLine(decrypted);
Console.WriteLine("Sending encrypted key to server: " + Convert.ToBase64String(encrypted));
client.SendMessage(new byte[] { 42 });
client.SendMessage(encrypted);
}
