public static byte[] ExportCspBlob(SafeKeyHandleImpl symKeyHandle, SafeKeyHandleImpl keyExchangeHandle, int blobType)
{
uint exportedKeyLength = 0;
if (!CryptoApi.CryptExportKey(symKeyHandle, keyExchangeHandle, (uint)blobType, 0, null, ref exportedKeyLength))
{
throw CreateWin32Error();
}
var exportedKeyBytes = new byte[exportedKeyLength];
if (!CryptoApi.CryptExportKey(symKeyHandle, keyExchangeHandle, (uint)blobType, 0, exportedKeyBytes, ref exportedKeyLength))
{
throw CreateWin32Error();
}
return(exportedKeyBytes);
}