private double[] Polyfit(double[] x, double[] y, int degree)
{
// Vandermonde matrix
var v = new MathNet.Numerics.LinearAlgebra.Double.DenseMatrix(x.Length, degree + 1);
for (int i = 0; i < v.RowCount; i++)
{
for (int j = 0; j <= degree; j++)
{
v[i, j] = Math.Pow(x[i], j);
}
}
var yv = new MathNet.Numerics.LinearAlgebra.Double.DenseVector(y).ToColumnMatrix();
QR <double> qr = v.QR(QRMethod.Full);
// Math.Net doesn't have an "economy" QR, so:
// cut R short to square upper triangle, then recompute Q
var r = qr.R.SubMatrix(0, degree + 1, 0, degree + 1);
var q = v.Multiply(r.Inverse());
var p = r.Inverse().Multiply(q.TransposeThisAndMultiply(yv));
return(p.Column(0).ToArray());
}
public static void ReceiveMessage()
{
while (true)
{
try
{
byte[] data = new byte[64];
StringBuilder builder = new StringBuilder();
int bytes = 0;
do
{
bytes = stream.Read(data, 0, data.Length);
builder.Append(Encoding.Unicode.GetString(data, 0, bytes));
}while (stream.DataAvailable);
string message = builder.ToString();
serverMessage sm = JsonConvert.DeserializeObject <serverMessage>(message);
switch (sm.type)
{
case "messageerror":
Console.WriteLine("Ошибка, сообщение невозможно отправить: " + sm.data);
break;
case "usersonline":
string[] usersList = sm.data.Split('|');
Console.WriteLine("Список пользователей онлайн:");
for (int i = 1; i <= usersList.Length; i++)
{
Console.WriteLine(i.ToString() + ". " + usersList[i - 1]);
}
break;
case "rejectconnection":
Console.WriteLine("Невозможно установить соединение: " + sm.data);
break;
case "connections":
string[] onlineConnections = sm.data.Split('|');
if (onlineConnections[0] == "")
{
Console.WriteLine("Подключения отсутствуют");
break;
}
Console.WriteLine("Текущие подключения:");
for (int i = 0; i < onlineConnections.Length; i++)
{
Console.WriteLine(i + ". " + onlineConnections[i]);
}
break;
case "alreadydisconnected":
Console.WriteLine("Пользователь " + sm.data + " не подключен");
break;
case "removeconnection":
Console.WriteLine("Пользователь " + sm.data + " отключен");
break;
case "connectionremoved":
Console.WriteLine("Пользователь " + sm.data + " отключился");
break;
case "acceptconnection":
Console.WriteLine("Пользователь " + sm.data + " устанавливает соединение...");
clientMessage cm = new clientMessage()
{
type = "accept", data = sm.data
};
string json = JsonConvert.SerializeObject(cm);
Console.WriteLine("JSON : " + json);
sendMessage(json);
break;
case "accept":
string[] keys = sm.data.Split('|');
string mySecretKey = keys[1];
string companionPublicKey = keys[2];
string[] mscdataString = mySecretKey.Split(' ');
string[] cpkdataString = companionPublicKey.Split(' ');
double[] mscdata = new double[mscdataString.Length];
double[] cpkdata = new double[cpkdataString.Length];
for (int i = 0; i < mscdataString.Length; i++)
{
mscdata[i] = Int32.Parse(mscdataString[i]);
cpkdata[i] = Int32.Parse(cpkdataString[i]);
}
Matrix <double> msc = new MathNet.Numerics.LinearAlgebra.Double.DenseMatrix(mscdata.Length, 1, mscdata);
Matrix <double> cpk = new MathNet.Numerics.LinearAlgebra.Double.DenseMatrix(cpkdata.Length, 1, cpkdata);
//Console.WriteLine("MY SEC: " + msc.ToString());
//Console.WriteLine("IT PUB: " + cpk.ToString());
msc = msc.Transpose();
Matrix <double> sKey = msc.Multiply(cpk);
sKey = sKey.Modulus(50);
commonSecretKey = (int)sKey[0, 0];
//Console.WriteLine("RES: " + Convert.ToString(commonSecretKey));
string Digits = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
byte[] data123 = BitConverter.GetBytes(commonSecretKey);
BigInteger intData = 0;
for (int i = 0; i < data123.Length; i++)
{
intData = intData * 256 + data123[i];
}
string result = "";
while (intData > 0)
{
int remainder = (int)(intData % 58);
intData /= 58;
result = Digits[remainder] + result;
}
for (int i = 0; i < data123.Length && data123[i] == 0; i++)
{
result = '1' + result;
}
csk = result;
Console.WriteLine("СГЕНЕРИРОВАН СЕКРЕТНЫЙ КЛЮЧ: " + csk);
Console.WriteLine("Установлена сессия с пользователем " + sm.name);
RC4Cipher newCipher = new RC4Cipher(csk, 19);
session newSession = new session()
{
name = sm.name, cipher = newCipher
};
addSession(newSession);
break;
default:
string fp = sm.type.Split('|')[0];
string sp = sm.type.Split('|')[1];
session rs = GetSession(sp);
if (fp == "message")
{
Console.WriteLine(sp + "(шифрованное): " + sm.data);
string decodemessage = rs.cipher.encode(sm.data);
Console.WriteLine(sp + "(дешифрованное): " + decodemessage);
}
break;
}
}
catch (Exception e)
{
Console.WriteLine("Подключение прервано! " + e);
Console.ReadLine();
Disconnect();
}
}
}
