DranaXum

Finally I found some spare time in order to write on this blog. I hope I will be able to write something interesting in the upcoming days as the summer holiday has come. I took some time off because I had a very tiring period in May with 5 contests (in which I was able to finish in the top spots).

I started working on a project, the project being a team of software developers. Although I am having my leadership capabilities tested, it’s quite fun and very different from writing software “alone”. Let’s hope this will come up nicely.

Off-topic: Many of you know that this period is marked by the EURO 2008 football tournament so HAI ROMANIA!

Hope to write here soon!

It’s here! The power of Winapi in your .NET based application.

I worked today on transfering all the Winapi-s to .NET. You can now just include as reference the NETApi.dll and then you can write code as if the api-s were .NET Native.

For example (code written in c#):

using System;
using System.Collections.Generic;
using System.Text;
using WIN32API;//the name of the namespace found in the NETApi.dll

namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
int p;
string path1=”f:\\testhex.txt”;
string path2=”e:\\testhex.txt”;
Decl.CopyFile(path1, path2, p);
}
}
}

The NETApi.dll is created in c# .NET 2.0 and contains three classes:
- Decl (contains declared functions and voids)
- Cst (contains constants)
- Types (contains structures and enums)

You can download the dll file from here: http://rapidshare.com/files/106919013/NETApi.dll.html

I will post it open source as soon as I’ll see there is a large request for this file.

If you find functions or voids that do not work please give me feedback!

Sometimes it’s all about having the right tool for editing. I’ve built a hex editor which can come in handy for many of those users who want to edit files (especially the binary ones). It can also be used in your program because I added the argument option.

It’s written in C# with .NET 2.0

Features:
- View file in hex
- Edit at provided offset (hex or int) - to provide a hex number please insert H in the front of the number, for example: 2D will be H2D
- Find specified string (use 0 to specify a null character)
- Edit from command line : hexeditor.exe path offset value , for example: hexeditor.exe “c:test.exe” H23 test

Download:

Source code: http://rapidshare.com/files/95709335/HexEditor.rar.html
Binary file: http://rapidshare.com/files/95709694/HexEditor.exe.html
.NET Framework: http://www.microsoft.com/downloads/…displaylang=en

Finally I found some spare time to write an article on my (this) blog.

In the last days I needed to write a plug-in system for one of my projects. I managed to write it in C# and decided to share it on my blog. It’s really simple to create as you will see:
//This is a C# Console Application Project. The code was written with .NET Framework 2.0

using System;
using System.Reflection; (more…)

I think many of you want a software that can help you change the MAC of a computer. This is why I built this tool! As you probably know, a Physical Address (MAC) is the address of the Network Card that identifies you in some way in a network (it might be local, wide or global). The problem is when you buy a new NIC (network card) or a new computer (with a new NIC) because you will have another MAC and you will have to call your Internet provider to change the information on the server. This can take a lot of time and is not worth it (time is money).

This software is really easy-to-use.

You can download it from here.

Source code here.

It’s coded in c# with .net 2.0 so you will need .NET Framework 2.0 which you can download it from here.

PS: I offer no warranty!

I ran over this problem a couple of days ago when I was writing a plug-in for one of my software projects. The Internet is full of examples of sending e-mail algorithms. The problem is none of them worked for me. After studying this problem I came up with a viable solution. In the following rows I will explain how it works (I’m proud that my solution was marked as an answer to this problem in the MSDN forum): (more…)

I’m sorry I didn’t have time to post some new researches/minitools. I’ve been busy working on some personal projects and stuff like that. Of course Christmas and New Year’s Day “trapped” me and I couldn’t write a line of code nor to post anything. I hope in a few months I will finish my projects and take time off to relax or to post something interesting.

A happy New Year!

PS: I’m glad that Sub to Srt converter is  becoming more and more popular on the Internet (4th link - Google.com).

As I said in a previous post, I worked on some research papers on cryptography and algorithms. I decided to publish, for now, one of the papers: “A study on sorting times”.

You can read/download it from here [romanian language].

This software will help you convert from .sub file to .srt subtitle file. .SRT files are “readable” for DivX Player. I needed yesterday a .srt subtitle for a movie but I could only find .sub files. [PS: I don't have BS Player] This is why I decided to write this miniconverter.

It is written in c# with .net 2.0. You can view the source-code here: Sub to Srt Converter Source code (if it doesn’t work try downloading it from here: http://rapidshare.com/files/67641688/Sub_To_Srt_Converter.pdf.html)or download the software here: http://rapidshare.com/files/67637436/subtosrt.exe.html

You will need .net 2.0 to run it so if you don’t have it you can download it from here .

Size of program: 24KB.

PS: Be careful which .sub files you want to convert because some may be invalid or corrupt.

This minor research paper details the algorithm of encoding a text using linguistic knowledge.

Let’s take a function f:A → B , where A is the collection of plain text words, and B is the collection of the encrypted words. We will take for each word in A, a word y from another language. This way “this” is “atunci”, where “atunci” means “then” in Romanian language. The words in the Romanian language corresponding to words in A collection, form the cipher’s key.

The problem of this algorithm is that it is vulnerable to frequency attack (more…)