/// <summary>
/// Шифрует общий секретный ключ.
/// </summary>
/// <param name="keyExchangeAlgorithm">Алгоритм шифрации общего секретного ключа.</param>
/// <exception cref="ArgumentNullException"></exception>
public GostKeyExchange CreateKeyExchangeInfo(SymmetricAlgorithm keyExchangeAlgorithm)
{
if (keyExchangeAlgorithm == null)
{
throw ExceptionUtility.ArgumentNull("keyExchangeAlgorithm");
}
var keyExchange = new GostKeyExchange();
var keyExchangeParameters = _publicKey.ExportParameters(false);
using (var keyExchangeAsym = new Gost3410EphemeralAsymmetricAlgorithm(keyExchangeParameters))
{
byte[] encodedKeyExchangeInfo;
using (var keyExchangeAlg = keyExchangeAsym.CreateKeyExchange(keyExchangeParameters))
{
encodedKeyExchangeInfo = keyExchangeAlg.EncodeKeyExchange(keyExchangeAlgorithm, GostKeyExchangeExportMethod.CryptoProKeyExport);
}
var keyExchangeInfo = new GostKeyExchangeInfo();
keyExchangeInfo.Decode(encodedKeyExchangeInfo);
keyExchange.SessionEncryptedKey = keyExchangeInfo;
keyExchange.TransportParameters = keyExchangeAsym.ExportParameters(false);
}
return(keyExchange);
}
/// <summary>
/// Шифрует общий секретный ключ.
/// </summary>
/// <param name="keyExchangeAlgorithm">Алгоритм шифрации общего секретного ключа.</param>
/// <exception cref="ArgumentNullException"></exception>
public GostKeyExchange CreateKeyExchangeInfo(SymmetricAlgorithm keyExchangeAlgorithm)
{
if (keyExchangeAlgorithm == null)
{
throw ExceptionUtility.ArgumentNull("keyExchangeAlgorithm");
}
var keyExchange = new GostKeyExchange();
var keyExchangeParameters = _publicKey.ExportParameters(false);
var digestoid = keyExchangeParameters.DigestParamSet;
Gost3410 keyExchangeAsym;
if (digestoid == Constants.OID_GR3411_12_256)
{
keyExchangeAsym = new Gost3410_2012_256EphemeralAsymmetricAlgorithm(keyExchangeParameters);
}
else if (digestoid == Constants.OID_GR3411_12_512)
{
keyExchangeAsym = new Gost3410_2012_512EphemeralAsymmetricAlgorithm(keyExchangeParameters);
}
else
{
keyExchangeAsym = new Gost3410EphemeralAsymmetricAlgorithm(keyExchangeParameters);
}
byte[] encodedKeyExchangeInfo;
using (var keyExchangeAlg = keyExchangeAsym.CreateKeyExchange(keyExchangeParameters))
{
encodedKeyExchangeInfo = keyExchangeAlg.EncodeKeyExchange(keyExchangeAlgorithm, GostKeyExchangeExportMethod.CryptoProKeyExport);
}
var keyExchangeInfo = new GostKeyExchangeInfo();
keyExchangeInfo.Decode(encodedKeyExchangeInfo);
keyExchange.SessionEncryptedKey = keyExchangeInfo;
keyExchange.TransportParameters = keyExchangeAsym.ExportParameters(false);
keyExchangeAsym.Dispose();
return(keyExchange);
}
/// <summary>
/// Шифрует общий секретный ключ.
/// </summary>
/// <param name="keyExchangeAlgorithm">Алгоритм шифрации общего секретного ключа.</param>
/// <exception cref="ArgumentNullException"></exception>
public GostKeyExchange CreateKeyExchangeInfo(SymmetricAlgorithm keyExchangeAlgorithm)
{
if (keyExchangeAlgorithm == null)
{
throw ExceptionUtility.ArgumentNull("keyExchangeAlgorithm");
}
var keyExchange = new GostKeyExchange();
var keyExchangeParameters = _publicKey.ExportParameters(false);
using (var keyExchangeAsym = new Gost3410EphemeralAsymmetricAlgorithm(keyExchangeParameters))
{
byte[] encodedKeyExchangeInfo;
using (var keyExchangeAlg = keyExchangeAsym.CreateKeyExchange(keyExchangeParameters))
{
encodedKeyExchangeInfo = keyExchangeAlg.EncodeKeyExchange(keyExchangeAlgorithm, GostKeyExchangeExportMethod.CryptoProKeyExport);
}
var keyExchangeInfo = new GostKeyExchangeInfo();
keyExchangeInfo.Decode(encodedKeyExchangeInfo);
keyExchange.SessionEncryptedKey = keyExchangeInfo;
keyExchange.TransportParameters = keyExchangeAsym.ExportParameters(false);
}
return keyExchange;
}
