public static Server.Models.Client Login(AdvanceStream stream, string loginData)
{
// To generate private key for RSA if not exist
RSA rsa = new RSA(LoginObject.newLoginObject(loginData).username);
KeyManager.generateRSAPublicKey(rsa.rsaSP);
KeyManager.generateRSAPrivateKey(rsa.rsaSP);
stream.Write("1");
stream.Write(KeyManager.RSAPublicKey);
AES aes = AES.getInstance();
byte[] msg = Encoding.UTF8.GetBytes(loginData);
byte[] EncreptedLoginData = rsa.encrypte(msg, KeyManager.serverRSAPublicKey);
MainWindow.instance.Log("Login Data", loginData);
MainWindow.instance.Log("Encrypted Login Data", Encoding.UTF8.GetString(EncreptedLoginData));
stream.Write(EncreptedLoginData);
string response = stream.ReadString();
if (response.Equals("0"))
{
//no user
MainWindow.instance.Log("No such user");
MainWindow.instance.Log();
return(null);
}
else if (response.Equals("1"))
{
//wrong password
MainWindow.instance.Log("Wrong Password");
MainWindow.instance.Log();
return(null);
}
else
{
//ok
response = stream.ReadString();
Server.Models.Client loginClient = Server.Models.Client.newClientObject(response);
MainWindow.instance.Log(response);
byte[] inStream = stream.ReadBytes();
byte[] decrypKey = rsa.decrypt(inStream, KeyManager.RSAPrivateKey);
MainWindow.instance.Log("Encrypted AES Key", Convert.ToBase64String(inStream, 0, inStream.Length));
KeyManager.serverAESPublicKey = Convert.ToBase64String(decrypKey, 0, decrypKey.Length);
MainWindow.instance.Log("AES Key", KeyManager.serverAESPublicKey);
return(loginClient);
}
}
private static void login(AdvanceStream stream)
{
AES aes = AES.getInstance();
string publicKey = stream.ReadString();
byte[] encryptByte = stream.ReadBytes();
RSA rsa = new RSA("Server");
byte[] realDatabyte = rsa.decrypt(encryptByte, KeysManager.RSAPrivateKey);
string realData = Encoding.UTF8.GetString(realDatabyte);
MainWindow.instance.Log("Encrypted Login Data", Encoding.UTF8.GetString(encryptByte));
MainWindow.instance.Log("Decrypted Login Data", realData);
LoginObject loginObject = LoginObject.newLoginObject(realData);
var user = DBContext.getInstace().Clients.SingleOrDefault(item => item.Username == loginObject.username);
if (user == null)
{
stream.Write("0");
MainWindow.instance.Log("Error no such user", loginObject.username);
}
else
{
if (!user.Password.Equals(loginObject.password))
{
stream.Write("1");
MainWindow.instance.Log("Error Wrong credentials", loginObject.username);
}
else
{
stream.Write("2");
stream.Write(user.toJsonObject());
byte[] encryptKey = rsa.encrypte(KeysManager.AESkey, publicKey);
stream.Write(encryptKey);
MainWindow.instance.Log("Logged in", user.Name);
}
}
MainWindow.instance.Log();
}