internal static extern ErrorCode BCryptExportKey([In] SafeBCryptKeyHandle hKey,
[In] IntPtr hExportKey,
[In][MarshalAs(UnmanagedType.LPWStr)] string pszBlobType,
[Out, MarshalAs(UnmanagedType.LPArray)] byte[] pbOutput,
[In] int cbOutput,
[In] ref int pcbResult,
[In] int dwFlags);
internal static byte[] ExportBCryptKey(SafeBCryptKeyHandle hKey, string blobType)
{
byte[] keyBlob = null;
int length = 0;
ErrorCode error = UnsafeNativeMethods.BCryptExportKey(hKey, IntPtr.Zero, blobType, null, 0, ref length, 0);
if (error != ErrorCode.BufferToSmall && error != ErrorCode.Success)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
keyBlob = new byte[length];
error = UnsafeNativeMethods.BCryptExportKey(hKey, IntPtr.Zero, blobType, keyBlob, length, ref length, 0);
if (error != ErrorCode.Success)
{
throw new CryptographicException(Marshal.GetLastWin32Error());
}
return(keyBlob);
}
