data[..(buffer.Length - DER.Length)].CopyTo(buffer.AsSpan(DER.Length));
data[eol1..].CopyTo(buffer.AsSpan(eol1 + _assets.Length * 4));
data[..(buffer.Length - DER.Length)].CopyTo(buffer.AsSpan(DER.Length));
data[eol1..].CopyTo(buffer.AsSpan(eol1 + _assets.Length * 4));