Private Static Void Writetextwithborder String Text

Private Static Void Writetextwithborder String Text




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private static void centerText(String text)
int winWidth = (Console.WindowWidth / 2);
Console.WriteLine(String.Format("{0,"+winWidth+"}", text));
Console.WriteLine(String.Format("{0,"+winWidth+"}", "text"));
centerText("*********************************************");
private static void title(string location)
centerText("+++ Du er nu her: " + location + "! +++");
private static void centerText(String text)
Console.Write(new string(' ', (Console.WindowWidth - text.Length) / 2));
string textClean = Regex.Replace(text, @"([rn])", string.Empty);
How to Remove Ubuntu or Other Linux from Dual Boot [Safely and Easily]
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private static void SendData(string text, Socket socket)
byte[] data = Encoding.UTF8.GetBytes(text);
byte[] signature = SignMessage(data);
byte[] signedmessage = data.Concat(Encoding.UTF8.GetBytes("::Salt::"))
.Concat(Encoding.UTF8.GetBytes("::Signature::"))
socket.BeginSend(signedmessage, 0, signedmessage.Length, SocketFlags.None, new AsyncCallback(SendCallback), socket);
Console.WriteLine("Sent data: " + text + " To: " + c.Socket.RemoteEndPoint.ToString());
private static byte[] SignMessage(byte[] message)
RNGCryptoServiceProvider randCSP = new RNGCryptoServiceProvider();
salt = Encoding.UTF8.GetBytes(Convert.ToBase64String(salt));
byte[] msgSalt = message.Concat(salt).ToArray();
var messageHash = hasher.ComputeHash(msgSalt);
CspParameters parms = new CspParameters();
parms.Flags = CspProviderFlags.NoFlags;
parms.KeyContainerName = Guid.NewGuid().ToString().ToUpperInvariant();
parms.ProviderType = ((Environment.OSVersion.Version.Major > 5) || ((Environment.OSVersion.Version.Major == 5) && (Environment.OSVersion.Version.Minor >= 1))) ? 0x18 : 1;
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(parms);
//Create a signature for HashValue and return it
return RSA.SignHash(messageHash, CryptoConfig.MapNameToOID("SHA256"));
private const string _rsaKeys = @"
private static void ReceiveCallback(IAsyncResult AR)
Socket socket = (Socket)AR.AsyncState;
int received = socket.EndReceive(AR);
byte[] dataBuf = new byte[received];
Array.Copy(_buffer, dataBuf, received);
//covert data to text, NOTE this scrambles signature
string text = Encoding.UTF8.GetString(dataBuf);
//get everything before the signature
var sigSplit = text.Split(new string[] { "::Signature::" }, StringSplitOptions.RemoveEmptyEntries);
//get salt and message strings as bytes again
var msgSplit = sigSplit[0].Split(new string[] { "::Salt::" }, StringSplitOptions.RemoveEmptyEntries);
byte[] message = Encoding.UTF8.GetBytes(msgSplit[0]);
salt = Encoding.UTF8.GetBytes(msgSplit[1]);
//work out signature length - could possibly be hardcoded to 512
var sigLength = received - (Encoding.UTF8.GetBytes(sigSplit[0]).Length + 13);
byte[] signature = new byte[sigLength];
Array.Copy(dataBuf, (Encoding.UTF8.GetBytes(sigSplit[0]).Length + 13), signature, 0, sigLength);
if (VerifyMessage(message, signature))
Console.WriteLine("Message received: " + msgSplit[0]);
Console.WriteLine("Signature was not verified.");
_clientSocket.BeginReceive(_buffer, 0, _buffer.Length, SocketFlags.None, new AsyncCallback(ReceiveCallback), _clientSocket);
private static bool VerifyMessage(byte[] message, byte[] signature)
byte[] msgSalt = message.Concat(salt).ToArray();
var messageHash = hasher.ComputeHash(msgSalt);
CspParameters parms = new CspParameters();
parms.Flags = CspProviderFlags.NoFlags;
parms.KeyContainerName = Guid.NewGuid().ToString().ToUpperInvariant();
parms.ProviderType = ((Environment.OSVersion.Version.Major > 5) || ((Environment.OSVersion.Version.Major == 5) && (Environment.OSVersion.Version.Minor >= 1))) ? 0x18 : 1;
RSACryptoServiceProvider RSA = new RSACryptoServiceProvider(parms);
//verify a signature for HashValue and return true/false
return RSA.VerifyHash(messageHash, CryptoConfig.MapNameToOID("SHA256"), signature);
private const string _rsaKeys = @"
How to Remove Ubuntu or Other Linux from Dual Boot [Safely and Easily]
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Private Static Void Writetextwithborder String Text


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