public static byte[] EncodePublicBlob(GostKeyExchangeParameters publicKeyParameters, GostAlgorithmType algorithm)
{
if (publicKeyParameters == null)
{
throw ExceptionUtility.ArgumentNull("publicKeyParameters");
}
int size;
int value;
switch (algorithm)
{
case GostAlgorithmType.Gost2001:
size = 512;
value = Constants.CALG_GR3410EL;
break;
case GostAlgorithmType.Gost2012_256:
size = 512;
value = Constants.CALG_GR3410_2012_256;
break;
case GostAlgorithmType.Gost2012_512:
size = 1024;
value = Constants.CALG_GR3410_2012_512;
break;
default:
throw new CryptographicException(Resources.AlgorithmNotAvailable);
}
var encodeKeyParameters = publicKeyParameters.EncodeParameters();
var importedKeyBytes = new byte[(encodeKeyParameters.Length + 16) + publicKeyParameters.PublicKey.Length];
importedKeyBytes[0] = 6;
importedKeyBytes[1] = 32;
Array.Copy(BitConverter.GetBytes(value), 0, importedKeyBytes, 4, 4);
Array.Copy(BitConverter.GetBytes(Constants.GR3410_1_MAGIC), 0, importedKeyBytes, 8, 4);
Array.Copy(BitConverter.GetBytes(size), 0, importedKeyBytes, 12, 4);
Array.Copy(encodeKeyParameters, 0, importedKeyBytes, 16, encodeKeyParameters.Length);
Array.Copy(publicKeyParameters.PublicKey, 0, importedKeyBytes, encodeKeyParameters.Length + 16, publicKeyParameters.PublicKey.Length);
return(importedKeyBytes);
}
public static byte[] EncodePublicBlob(GostKeyExchangeParameters publicKeyParameters)
{
if (publicKeyParameters == null)
{
throw new Exception("ArgumentNull - publicKeyParameters");
}
var encodeKeyParameters = publicKeyParameters.EncodeParameters();
var importedKeyBytes = new byte[(encodeKeyParameters.Length + 16) + publicKeyParameters.PublicKey.Length];
importedKeyBytes[0] = 6;
importedKeyBytes[1] = 32;
Array.Copy(BitConverter.GetBytes(GostConstants.CALG_GR3410EL), 0, importedKeyBytes, 4, 4);
Array.Copy(BitConverter.GetBytes(GostConstants.GR3410_1_MAGIC), 0, importedKeyBytes, 8, 4);
Array.Copy(BitConverter.GetBytes(GostConstants.GOST_3410EL_SIZE), 0, importedKeyBytes, 12, 4);
Array.Copy(encodeKeyParameters, 0, importedKeyBytes, 16, encodeKeyParameters.Length);
Array.Copy(publicKeyParameters.PublicKey, 0, importedKeyBytes, encodeKeyParameters.Length + 16, publicKeyParameters.PublicKey.Length);
return(importedKeyBytes);
}
public static byte[] EncodePublicBlob(GostKeyExchangeParameters publicKeyParameters, int algId)
{
if (publicKeyParameters == null)
{
throw new ArgumentNullException(nameof(publicKeyParameters));
}
int keySize;
if (algId == GostConstants.CALG_GR3410EL)
{
keySize = GostConstants.GOST_3410EL_SIZE;
}
else if (algId == GostConstants.CALG_GR3410_12_256)
{
keySize = GostConstants.GOST3410_2012_256KEY_SIZE;
}
else if (algId == GostConstants.CALG_GR3410_12_512)
{
keySize = GostConstants.GOST3410_2012_512KEY_SIZE;
}
else
{
throw new CryptographicException(
SR.Cryptography_CSP_WrongKeySpec);
}
var encodeKeyParameters = publicKeyParameters.EncodeParameters();
var importedKeyBytes = new byte[(encodeKeyParameters.Length + 16) + publicKeyParameters.PublicKey.Length];
importedKeyBytes[0] = 6;
importedKeyBytes[1] = 32;
Array.Copy(BitConverter.GetBytes(algId), 0, importedKeyBytes, 4, 4);
Array.Copy(BitConverter.GetBytes(GostConstants.GR3410_1_MAGIC), 0, importedKeyBytes, 8, 4);
Array.Copy(BitConverter.GetBytes(keySize), 0, importedKeyBytes, 12, 4);
Array.Copy(encodeKeyParameters, 0, importedKeyBytes, 16, encodeKeyParameters.Length);
Array.Copy(publicKeyParameters.PublicKey, 0, importedKeyBytes, encodeKeyParameters.Length + 16, publicKeyParameters.PublicKey.Length);
return(importedKeyBytes);
}
