}

	var off, length int64
	off, length, err = rs.GetOffsetLength(decObjSize)
	if err != nil {
		return
	}

	// At this point, we have:
	//
	// 1. the decrypted part sizes in `sizes` (single element for
	//    single part object) and total decrypted object size `decObjSize`
	//
	// 2. the (decrypted) start offset `off` and (decrypted)
	//    length to read `length`
	//