// Шифрование тестового файла.
static void EncryptTestFile(
Gost3410_2012_512 publicKey,
Gost3410_2012_512CryptoServiceProvider privateKey,
string fileId = "2012_512")
{
// Создаем симметричный ключ.
Gost28147 symmetric = Gost28147.Create();
// Открываем ключ отправителя.
Gost3410Parameters srcPublicKeyParameters = privateKey.ExportParameters(false);
// Создаем agree ключ
GostSharedSecretAlgorithm agree = privateKey.CreateAgree(
publicKey.ExportParameters(false));
// Зашифровываем симметричный ключ на agree ключе.
byte[] WrappedKey = agree.Wrap(symmetric,
GostKeyWrapMethod.CryptoPro12KeyWrap);
// Создаем поток шифратора.
ICryptoTransform transform = symmetric.CreateEncryptor();
// Создаем зашифрованный файл.
using (FileStream ofs = new FileStream(string.Format(EncryptedFileName, fileId), FileMode.Create))
{
BinaryWriter bw = new BinaryWriter(ofs);
// Записываем зашифрованный симметричный ключ.
bw.Write(WrappedKey.Length);
bw.Write(WrappedKey);
// Записываем синхропосылку
bw.Write(symmetric.IV.Length);
bw.Write(symmetric.IV);
// Передаем открытый ключ.
BinaryFormatter formatter = new BinaryFormatter();
formatter.Serialize(ofs, srcPublicKeyParameters);
// Создаем поток шифрования для записи в файл.
using (CryptoStream cs = new CryptoStream(ofs, transform, CryptoStreamMode.Write))
{
byte[] data = new byte[4096];
// Открываем входной файл.
using (FileStream ifs = new FileStream(string.Format(SourceFileName, fileId), FileMode.Open, FileAccess.Read))
{
// и переписываем содержимое в выходной поток.
int length = ifs.Read(data, 0, data.Length);
while (length > 0)
{
cs.Write(data, 0, length);
length = ifs.Read(data, 0, data.Length);
}
}
}
}
}
private static void EncriptFile(X509Certificate2 sert, string sourceFile, string encFile)
{
var publicKey = (Gost3410_2012_256CryptoServiceProvider)sert.PublicKey.Key;
var asymmetricAlg = publicKey as Gost3410_2012_256;
if (asymmetricAlg == null)
{
throw new CryptographicException("Not a gost certificate");
}
var symmetricKey = Gost28147.Create();
Gost3410_2012_256 senderRndKey = Gost3410_2012_256.Create();
Gost3410Parameters senderRndKeyParameters = senderRndKey.ExportParameters(false);
GostSharedSecretAlgorithm agreeKey = senderRndKey.CreateAgree(asymmetricAlg.ExportParameters(false));
var encodedSymmetricKey = agreeKey.Wrap(symmetricKey, GostKeyWrapMethod.CryptoProKeyWrap);
ICryptoTransform transform = symmetricKey.CreateEncryptor();
using (FileStream writer = new FileStream(encFile, FileMode.Create))
{
BinaryWriter binaryWriter = new BinaryWriter(writer);
binaryWriter.Write(encodedSymmetricKey.Length);
binaryWriter.Write(encodedSymmetricKey);
binaryWriter.Write(symmetricKey.IV.Length);
binaryWriter.Write(symmetricKey.IV);
BinaryFormatter binaryFormatter = new BinaryFormatter();
binaryFormatter.Serialize(writer, senderRndKeyParameters);
using (CryptoStream cryptoStream = new CryptoStream(writer, transform, CryptoStreamMode.Write))
{
var buffer = new byte[100];
using (FileStream reader = new FileStream(sourceFile, FileMode.Open, FileAccess.Read))
{
var length = reader.Read(buffer, 0, buffer.Length);
while (length > 0)
{
cryptoStream.Write(buffer, 0, buffer.Length);
length = reader.Read(buffer, 0, buffer.Length);
}
}
}
}
}
/// <summary>
/// Формирование данных обмена, на основе симметричного
/// ключа шифрования сообщения ГОСТ 28147.
/// </summary>
///
/// <param name="alg">Симметричный ключ ГОСТ 28147.</param>
/// <param name="wrapMethod">Алгоритм экпорта</param>
/// <returns>Зашифрованные данные для отправки стороне
/// получателю.</returns>
///
/// <argnull name="alg" />
public GostKeyTransport CreateKeyExchange(SymmetricAlgorithm alg, GostKeyWrapMethod wrapMethod)
{
if (alg == null)
{
throw new ArgumentNullException("alg");
}
if (wrapMethod != GostKeyWrapMethod.CryptoProKeyWrap && wrapMethod != GostKeyWrapMethod.CryptoPro12KeyWrap)
{
throw new CryptographicException(
string.Format(Properties.Resources.Cryptography_UnsupportedWrapMethod, wrapMethod));
}
// Получаем параметры получателя.
Gost3410Parameters senderParameters = gostKey_.ExportParameters(
false);
GostKeyTransportObject transport = new GostKeyTransportObject();
// Создаем эфимерный ключ с параметрами получателя.
using (Gost3410_2012_512EphemeralCryptoServiceProvider sender = new Gost3410_2012_512EphemeralCryptoServiceProvider(
senderParameters))
{
// Создаем распределенный секрет.
byte[] wrapped_data;
using (GostSharedSecretAlgorithm agree = sender.CreateAgree(
senderParameters))
{
// Зашифровываем симметричный ключ.
wrapped_data = agree.Wrap(alg,
wrapMethod);
}
GostWrappedKeyObject wrapped = new GostWrappedKeyObject();
wrapped.SetByXmlWrappedKey(wrapped_data);
transport.sessionEncryptedKey_ = wrapped;
transport.transportParameters_ = new Gost3410CspObject();
transport.transportParameters_.Parameters = sender.ExportParameters(false);
}
return(transport.Transport);
}
/// <summary>
/// Создает маркант с помошью ключа согласования
/// </summary>
/// <param name="gost28147">Сессионный ключ</param>
/// <param name="certFileName">Путь к файлу сертификата получателя</param>
/// <param name="providerInitData">Информация для инициализации контейнера криптопровайдера c закрытым ключом отправителя</param>
/// <returns>Сгенерированный маркант</returns>
public static Markant CreateMarkantWithKeyAgree(Gost28147 gost28147, string certFileName, ProviderInitData providerInitData)
{
// Разбираем сертификат получателя
X509Certificate2 cert = new X509Certificate2(certFileName);
if (!(cert.PublicKey.Key is Gost3410_2012_256 gost3410))
{
throw new CryptographicException("Not a GOST certificate");
}
//Готовим параметры контейнера
CspParameters cspParameters = new CspParameters
{
ProviderType = (int)providerInitData.ProviderType,
Flags = CspProviderFlags.NoPrompt,
KeyPassword = providerInitData.ProviderPassword,
KeyContainerName = providerInitData.ProviderContainerName
};
//Открываем контейнер
Gost3410_2012_256CryptoServiceProvider encrypt_gost3410 = new Gost3410_2012_256CryptoServiceProvider(cspParameters);
Gost3410Parameters encrypt_gost3410PublicKeyParameters = encrypt_gost3410.ExportParameters(false);
// Создаем agree ключ
GostSharedSecretAlgorithm agree = encrypt_gost3410.CreateAgree(gost3410.ExportParameters(false));
// Зашифровываем симметричный ключ на agree ключе.
byte[] wrappedKey = agree.Wrap(gost28147, GostKeyWrapMethod.CryptoProKeyWrap);
//Формируем маркант
Markant m = new Markant
{
Version = 2,
SessionKey = wrappedKey,
IV = gost28147.IV,
PublicKey = Helper.ObjectToByteArray(encrypt_gost3410PublicKeyParameters)
};
return(m);
}
private void button4_Click(object sender, EventArgs e)
{
if (checkBox2.Checked && !checkBox1.Checked)
{
string plain_text = richTextBox1.Text;
byte[] plain_text_bytes = Encoding.ASCII.GetBytes(plain_text);
Gost3411CryptoServiceProvider hash = new Gost3411CryptoServiceProvider();
byte[] signature = csp.SignData(plain_text_bytes, hash);
BERelement main_seq = new BERelement(0x30);
BERelement sign_seq = new BERelement(0x30);
sign_seq.AddItem(new BERelement(0x0C, cert_name));
sign_seq.AddItem(new BERelement(0x04, signature));
sign_seq.AddItem(new BERelement(0x04, plain_text_bytes));
main_seq.AddItem(sign_seq);
byte[] test = main_seq.GetEncodedPacket().ToArray();
File.WriteAllBytes("signature", test);
try
{
Int32 port = 9595;
TcpClient client = new TcpClient("127.0.0.1", port);
NetworkStream stream = client.GetStream();
stream.Write(mode, 1, 1);
stream.Write(test, 0, test.Length);
stream.Close();
client.Close();
}
catch (ArgumentNullException exception)
{
MessageBox.Show("ArgumentNullException: " + exception);
}
catch (SocketException exception)
{
MessageBox.Show("SocketException: " + exception);
}
}
else if (checkBox1.Checked && !checkBox2.Checked)
{
Gost28147 gost = Gost28147.Create();
Gost3410Parameters public_key = csp.ExportParameters(false);
GostSharedSecretAlgorithm agree_key = csp.CreateAgree(sign.ExportParameters(false));
byte[] wrapped_key = agree_key.Wrap(gost, GostKeyWrapMethod.CryptoProKeyWrap);
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.Serialize(ms, public_key);
byte[] public_key_bytes = ms.ToArray();
ms.Close();
MemoryStream memory_stream = new MemoryStream();
CryptoStream cs = new CryptoStream(memory_stream, gost.CreateEncryptor(), CryptoStreamMode.Write);
string plain_text = richTextBox1.Text;
byte[] plain_text_bytes = Encoding.ASCII.GetBytes(plain_text);
cs.Write(plain_text_bytes, 0, plain_text_bytes.Length);
cs.FlushFinalBlock();
byte[] cipher_text_bytes = memory_stream.ToArray();
memory_stream.Close();
cs.Close();
BERelement main_seq = new BERelement(0x30);
BERelement sign_seq = new BERelement(0x30);
sign_seq.AddItem(new BERelement(0x0C, cert_name));
sign_seq.AddItem(new BERelement(0x04, wrapped_key));
sign_seq.AddItem(new BERelement(0x04, gost.IV));
sign_seq.AddItem(new BERelement(0x04, public_key_bytes));
sign_seq.AddItem(new BERelement(0x04, cipher_text_bytes));
main_seq.AddItem(sign_seq);
byte[] test = main_seq.GetEncodedPacket().ToArray();
File.WriteAllBytes("encryption", test);
try
{
Int32 port = 9595;
TcpClient client = new TcpClient("127.0.0.1", port);
NetworkStream stream = client.GetStream();
stream.Write(mode, 0, 1);
stream.Write(test, 0, test.Length);
stream.Close();
client.Close();
}
catch (ArgumentNullException exception)
{
MessageBox.Show("ArgumentNullException: " + exception);
}
catch (SocketException exception)
{
MessageBox.Show("SocketException: " + exception);
}
}
else if (checkBox2.Checked && checkBox1.Checked)
{
MessageBox.Show("suka!");
string plain_text = richTextBox1.Text;
byte[] plain_text_bytes = Encoding.ASCII.GetBytes(plain_text);
Gost3411CryptoServiceProvider hash = new Gost3411CryptoServiceProvider();
byte[] signature = csp.SignData(plain_text_bytes, hash);
BERelement main_seq = new BERelement(0x30);
BERelement sign_seq = new BERelement(0x30);
sign_seq.AddItem(new BERelement(0x0C, cert_name));
sign_seq.AddItem(new BERelement(0x04, signature));
sign_seq.AddItem(new BERelement(0x04, plain_text_bytes));
main_seq.AddItem(sign_seq);
byte[] test = main_seq.GetEncodedPacket().ToArray();
File.WriteAllBytes("signature_and_encryption", test);
Gost28147 gost = Gost28147.Create();
Gost3410Parameters public_key = csp.ExportParameters(false);
GostSharedSecretAlgorithm agree_key = csp.CreateAgree(sign.ExportParameters(false));
byte[] wrapped_key = agree_key.Wrap(gost, GostKeyWrapMethod.CryptoProKeyWrap);
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.Serialize(ms, public_key);
byte[] public_key_bytes = ms.ToArray();
ms.Close();
MemoryStream memory_stream = new MemoryStream();
CryptoStream cs = new CryptoStream(memory_stream, gost.CreateEncryptor(), CryptoStreamMode.Write);
//string plain_text = richTextBox1.Text;
//byte[] plain_text_bytes = Encoding.ASCII.GetBytes(plain_text);
byte[] plain_text_bytes2 = test;
cs.Write(plain_text_bytes2, 0, plain_text_bytes2.Length);
cs.FlushFinalBlock();
byte[] cipher_text_bytes2 = memory_stream.ToArray();
memory_stream.Close();
cs.Close();
BERelement main_seq2 = new BERelement(0x30);
BERelement sign_seq2 = new BERelement(0x30);
sign_seq2.AddItem(new BERelement(0x0C, cert_name));
sign_seq2.AddItem(new BERelement(0x04, wrapped_key));
sign_seq2.AddItem(new BERelement(0x04, gost.IV));
sign_seq2.AddItem(new BERelement(0x04, public_key_bytes));
sign_seq2.AddItem(new BERelement(0x04, cipher_text_bytes2));
main_seq2.AddItem(sign_seq2);
byte[] test2 = main_seq2.GetEncodedPacket().ToArray();
try
{
Int32 port = 9595;
TcpClient client = new TcpClient("127.0.0.1", port);
NetworkStream stream = client.GetStream();
stream.Write(mode, 2, 1);
stream.Write(test2, 0, test2.Length);
stream.Close();
client.Close();
}
catch (ArgumentNullException exception)
{
MessageBox.Show("ArgumentNullException: " + exception);
}
catch (SocketException exception)
{
MessageBox.Show("SocketException: " + exception);
}
}
}
private void button1_Click(object sender, EventArgs e)
{
Gost28147 gost = Gost28147.Create();
Gost3410Parameters public_key = csp.ExportParameters(false);
GostSharedSecretAlgorithm agree_key = csp.CreateAgree(sign.ExportParameters(false));
byte[] wrapped_key = agree_key.Wrap(gost, GostKeyWrapMethod.CryptoProKeyWrap);
BinaryFormatter bf = new BinaryFormatter();
MemoryStream ms = new MemoryStream();
bf.Serialize(ms, public_key);
byte[] public_key_bytes = ms.ToArray();
ms.Close();
MemoryStream memory_stream = new MemoryStream();
CryptoStream cs = new CryptoStream(memory_stream, gost.CreateEncryptor(), CryptoStreamMode.Write);
string plain_text = richTextBox1.Text;
byte[] plain_text_bytes = Encoding.ASCII.GetBytes(plain_text);
cs.Write(plain_text_bytes, 0, plain_text_bytes.Length);
cs.FlushFinalBlock();
byte[] cipher_text_bytes = memory_stream.ToArray();
memory_stream.Close();
cs.Close();
BERelement main_seq = new BERelement(0x30);
BERelement sign_seq = new BERelement(0x30);
sign_seq.AddItem(new BERelement(0x02, wrapped_key));
sign_seq.AddItem(new BERelement(0x02, gost.IV));
sign_seq.AddItem(new BERelement(0x02, public_key_bytes));
sign_seq.AddItem(new BERelement(0x02, cipher_text_bytes));
main_seq.AddItem(sign_seq);
byte[] test = main_seq.GetEncodedPacket().ToArray();
//File.WriteAllBytes("asn1", test);
/*
* sign_seq.AddItem(new BERelement(0x02, signature));
* sign_seq.AddItem(new BERelement(0x02, plain_text_bytes));
*
* main_seq.AddItem(sign_seq);
* byte[] test = main_seq.GetEncodedPacket().ToArray();
*/
//send data
try
{
Int32 port = 9595;
TcpClient client = new TcpClient("127.0.0.1", port);
NetworkStream stream = client.GetStream();
stream.Write(mode, 0, 1);
stream.Write(test, 0, test.Length);
//stream.Write(wrapped_key, 0, wrapped_key.Length);
//stream.Write(gost.IV, 0, gost.IV.Length);
//stream.Write(public_key_bytes, 0, public_key_bytes.Length);
//stream.Write(cipher_text_bytes, 0, cipher_text_bytes.Length);
stream.Close();
client.Close();
}
catch (ArgumentNullException exception)
{
MessageBox.Show("ArgumentNullException: " + exception);
}
catch (SocketException exception)
{
MessageBox.Show("SocketException: " + exception);
}
}
