private static void transferWithPGP(AdvanceStream stream)
{
AES aes = AES.getInstance();
RSA rsa = new RSA("Server");
byte[] encrypytedSessionKey = stream.ReadBytes();
byte[] sessionKeyBytes = rsa.decrypt(encrypytedSessionKey, KeysManager.RSAPrivateKey);
string encrypteTransferData = stream.ReadString();
string decrptedTransferData = aes.Decrypt(encrypteTransferData, getString(sessionKeyBytes));
MainWindow.instance.Log("Encrypted Session Key", Convert.ToBase64String(encrypytedSessionKey));
MainWindow.instance.Log("Decrypted Session Key", Convert.ToBase64String(sessionKeyBytes));
MainWindow.instance.Log("Encrypted Transfer Data", encrypteTransferData);
MainWindow.instance.Log("Decrypted Transfer Data", decrptedTransferData);
string clientPublicKey = stream.ReadString();
MainWindow.instance.Log("Client Public RSA Key", clientPublicKey);
byte[] signture = stream.ReadBytes();
string recivedMessage = getString(encrypytedSessionKey) + encrypteTransferData;
if (rsa.verifyData(getBytes(recivedMessage), clientPublicKey, signture))
{
TransactionObject tran = TransactionObject.newLoginObject(decrptedTransferData);
if (DBContext.DoTransaction(tran.senderID, tran.reciverID, tran.amount))
{
MainWindow.instance.Log("Transfer money done");
}
else
{
MainWindow.instance.Log("Can't transfer money");
}
}
else
{
MainWindow.instance.Log("Can't transfer money invalide signture");
}
MainWindow.instance.Log();
}
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();
}
private static void signUp(AdvanceStream stream, MainWindow mainWindow)
{
string digCer = stream.ReadString();
DigitalCertificate dc = DigitalCertificate.newClientObject(digCer);
MainWindow.instance.Log("Get client certificate.....");
string publicKey = "";
MainWindow.instance.Log("connect to CA.....");
MainWindow.clientForCertificate.connect((e) =>
{
e.Write("2");
});
publicKey = getCApublicKey(MainWindow.clientForCertificate.stream);
KeysManager.RSAPcublicKeyOfCA = publicKey;
MainWindow.instance.Log("CA public key", publicKey);
if (dc.verviy())
{
stream.Write("1");
byte[] encrSingUpdata = stream.ReadBytes();
RSA rsa = new RSA("Server");
byte[] decrypSingUpData = rsa.decrypt(encrSingUpdata, KeysManager.RSAPrivateKey);
MainWindow.instance.Log("Encrypted SignUp Data", Encoding.UTF8.GetString(encrSingUpdata));
MainWindow.instance.Log("Decrypted SignUp Data", Encoding.UTF8.GetString(decrypSingUpData));
SignUpObject signUpObject = SignUpObject.newLoginObject(Encoding.UTF8.GetString(decrypSingUpData));
var user = DBContext.getInstace().Clients.SingleOrDefault(item => item.Username == signUpObject.username);
if (user != null)
{
if (user.Username.Equals(signUpObject.username))
{
stream.Write("0");
MainWindow.instance.Log("Error username already taken ", signUpObject.username);
}
else
{
stream.Write("1");
MainWindow.instance.Log("Error password already taken");
}
}
else
{
DBContext.getInstace().Clients.Add(new Models.Client(signUpObject.name, signUpObject.username, signUpObject.password));
DBContext.getInstace().SaveChanges();
stream.Write("2");
user = DBContext.getInstace().Clients.SingleOrDefault(item => item.Username == signUpObject.username);
stream.Write(user.toJsonObject() + '\t' + "");
byte[] encryptKey = rsa.encrypte(KeysManager.AESkey, dc.SubjectPublicKey);
stream.Write(encryptKey);
MainWindow.instance.Log("Sign Up Successfully", user.Name);
}
}
else
{
stream.Write("0");
}
MainWindow.instance.Log();
}
private static string getCApublicKey(AdvanceStream stream)
{
stream.Write("3");
return(stream.ReadString());
}