public byte[] Sign(byte[] data, int certIndex)
{
try
{
if (hash == null)
{
throw new NullReferenceException("Compute hash first");
}
CspParameters cp = new CspParameters();
var privateKey = ClientCertificates[certIndex].PrivateKey as Gost3410_2012_256CryptoServiceProvider;
var uniqueKeyContainerName = privateKey.CspKeyContainerInfo.UniqueKeyContainerName;
cp.KeyContainerName = uniqueKeyContainerName;
cp.ProviderType = 75;
cp.ProviderName = null;
Gost3410_2012_256 gkey = new Gost3410_2012_256CryptoServiceProvider(cp);
Gost3410_2012_256CryptoServiceProvider srcContainer = new Gost3410_2012_256CryptoServiceProvider(cp);
Gost3410Parameters srcPublicKeyParameters = srcContainer.ExportParameters(false);
if (srcContainer == null)
{
throw new Exception("У сертификата нет приватного ключа");
}
signature = srcContainer.CreateSignature(hasher.Hash);
sCert = ClientCertificates[certIndex].Export(X509ContentType.Cert);
sTime = DateTime.Now;
return(Asn1Formatter.CreateSignature(signature, sCert, sTime, data));
}
catch (CryptographicException ex)
{
Console.WriteLine(ex.Message);
return(null);
}
}
private void EncryptOperationTo()
{
try
{
crypter = new Crypter();
var operation = DetermineOpearation();
var operationAsn1 = Asn1Formatter.SetCommandAsn1((int)Cmd.cipher);
byte[] buffer;
handler.Send(operationAsn1);
data = handler.Recieve();
var text = (string)CerificatesBox.Invoke(new Func <string>(() => CerificatesBox.Text));
var asn1Cert = Asn1Formatter.SetCertNameAsn1(Encoding.ASCII.GetBytes(text));
handler.Send(asn1Cert);
data = handler.Recieve();
byte[] cert = Asn1Formatter.GetCertAsn1(data);
crypter.FromBytesToCert(cert);
byte[] symivBytes = Asn1Formatter.SetSymKeyAndIVAsn1(crypter.GetEncryptedSymKey(), crypter.IV);
handler.Send(symivBytes);
data = handler.Recieve();
if (Encoding.ASCII.GetString(Asn1Formatter.GetCertAsn1(data)) == "ESTABLISHED")
{
text = (string)textBox1.Invoke(new Func <string>(() => textBox1.Text));
buffer = crypter.Encrypt(Encoding.ASCII.GetBytes(text));
handler.Send(buffer);
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
private void SignOperationTo()
{
try
{
var operation = DetermineOpearation();
var operationAsn1 = Asn1Formatter.SetCommandAsn1((int)Cmd.sign);
handler.Send(operationAsn1);
data = handler.Recieve();
if (Encoding.ASCII.GetString(Asn1Formatter.GetCertAsn1(data)) == "ESTABLISHED")
{
int certIndex = (int)CerificatesBox.Invoke(new Func <int>(() => CerificatesBox.SelectedIndex));
handler.Send(crypter.Sign(Encoding.ASCII.GetBytes(textBox1.Text), certIndex));
}
else
{
throw new Exception("Error while send");
}
}
catch (NullReferenceException ne)
{
var errorCode = Asn1Formatter.SetCommandAsn1((int)Cmd.error);
handler.Send(errorCode);
MessageBox.Show(ne.Message);
Console.WriteLine(ne.Message);
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
private void Cipher_CheckedChanged(object sender, EventArgs e)
{
if (Cipher.Checked)
{
var asn1Cmd = Asn1Formatter.SetCommandAsn1((int)Cmd.certs);
handler.Send(asn1Cmd);
data = handler.Recieve();
BERelement certsNames = BERelement.DecodePacket(data);
CerificatesBox.DataSource = null;
CerificatesBox.Items.Clear();
foreach (var cert in certsNames.Items)
{
CerificatesBox.Items.Add(Encoding.ASCII.GetString(cert.Value));
}
CerificatesBox.SelectedIndex = 0;
}
}
private void GetCertsFromServer(object sender, EventArgs e)
{
var asn1Cmd = Asn1Formatter.SetCommandAsn1((int)Cmd.certs);
int.TryParse(textBox3.Text, out int port);
handler = new ClientSocket(textBox2.Text, port);
handler.Init();
handler.Send(asn1Cmd);
data = handler.Recieve();
BERelement certsNames = BERelement.DecodePacket(data);
CerificatesBox.DataSource = null;
CerificatesBox.Items.Clear();
foreach (var cert in certsNames.Items)
{
CerificatesBox.Items.Add(Encoding.ASCII.GetString(cert.Value));
}
CerificatesBox.SelectedIndex = 0;
}
