Convert a SID to String with Java

A security identifier (SID) is an unique identifier, commonly used in Microsoft’s systems. For example, it’s used to identify users within Windows, or, more generally, within an Active Directory.

The SID is a binary value, with a variable length, that can be also be represented as a string. This conversion is implemented by the function called ConvertSidToStringSid, provided by the library Advapi32.dll, available only in Windows.

Hence, if you need to perform this conversion, you can procede with one of these two paths:

  • Use Advapi32 (only in Windows)
  • Rewrite the conversion
Thus, it’s very useful to have that implementation in a particular language (in our case Java), to be used everywhere. I noticed that, after a research in Internet, all the implementations are wrong, despite they work in general. Therefore, I decided to write my own implementation, thoroughly tested to prove you its correctness.

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Justified Gallery is born

A common problem, for people who create sites, is to create an elegant image gallery that manages the various sizes of images. Flickr and Google+ manage this situation in an excellent way, the purpose of this plugin is to give you the power of this solutions, with a new fast algorithm.

Some month ago, I wrote a WordPress plugin that shows a Flickr photostream with a justified grid. Now, I decided to do a more abstract plugin (jQuery plugin) that can be used everywhere!

See all the documentation in its project page. Or download it from github.

Miro Rubix comes back!

Hi! I just put online again the Miro Rubix game for PC and for PSP! A simple puzzle inspired by the famous game called Rubik’s Cube. The puzzle starts with two equal pictures where only the left one is mixed in various boxes. Moving the columns and the rows of the left one, you just have to form the picture on the right. The game comes with few puzzles. Some puzzles are classic, they contains only boxes with few colors; the other was created using various photos. But, you can create your own puzzle with your own photos!

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Flickr Justified Gallery for WordPress is born

My first WordPress Plugin has just been released!

Plugin that allows you to show your Flickr photostream, photosets, galleries, group pools, or tags in your blog, with a very elegant and awesome layout. Awesome thumbnails disposition with a justified grid, using Justified Gallery. Various settings to configure the size of images in the gallery and its behaviour (you can show photos with a lightbox, or with a link to Flickr). You can configure the number of photos per page, then, you can navigate between various pages. The plugin chooses the right resolution for the image, using the Flickr size suffixes, always obtaining high quality galleries.

See it in the official page.

Network Time Protocol request in C#

I’m writing an application in C# that needs to know if the system time is not fake (only if the network is on). For this reason, I make a class that retrieves the time from a NTP server. The class is written to prevent that the same servers are called too often using a simple circular array. For the data returned by the servers, I invite you to see the RFC-2030.

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ExitWindowsEx in C#

I post you my simple class to shutdown, reboot and logoff Windows using the famous ExitWindowsEx. Each method is overloaded with another that force the action, in other words, it executes the action without prohibiting Windows to send the WM_QUERYENDSESSION message. With the latter way, the user can’t cancel it.

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Hide Console Window in C#

I just made a silent application to check how much time my brother stay on his computer. But, I needed to make an application that doesn’t show any window. Now, I show you my personal solutions to do this for the Console Application Projects and for the Windows Forms Application Projects.

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LAMP Virtual Hosts

In the last post I tell you how you can install LAMP in Ubuntu 11.10. Now I tell you how to configure virtual hosts, in this way you can create a lot of independent sites (also in different domains).

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Install LAMP on Ubuntu

The last week I re-installed LAMP on Ubuntu 11.10 to try somethings.

I post you the simply instructions to install all fine. In the future I’ll post you something about the sites configuration.

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