stas'den - opensource

"keyboard injection" under Linux

Wed, 15 Aug 2007 21:20:27 -0300

What to do if you want to pass some data into STDIN of some process, and it doesn't accepts it?! One of the most (un)famous example is ssh; who never tried to do a "echo password | ssh host"?! So, you just want to inject characters as there were someone typing them. Remember: TIOCSTI ioctl() call is your friend
Just google it to see what it does. And now, some actually working code:

#!/usr/bin/perl -w
use strict;
use Fcntl;
use constant TIOCSTI => 0x5412;

unless (@ARGV >= 1) {
 print "usage: $0 [vt] <input>\n";
 exit;
}

my $vt = shift @ARGV;
my $buf = join '', <>;
&writevt ($vt, $buf) || die "can't write to $vt: $!\n";
exit;


sub writevt {
 my ($vt, $buf) = @_;
 sysopen (VT, $vt, O_RDONLY) || return 0;
 for (my $i = 0; $i < length $buf; $i++) {
 ioctl (VT, TIOCSTI, substr ($buf, $i, 1)) || return 0;
 }
 close (VT) || return 0;
 return 1;
}

And this is how it works (Linux-specific!!!):

[stas@home stas]$ echo id | ./catvt.pl /dev/pts/0
id
[stas@home stas]$ id
uid=?????(stas) gid=?????(stas) groups=?????(stas)

Kinda awesome

Geolizer HTTP stats

Tue, 16 Jan 2007 15:00:00 -0200

About Geolizer

This is an enhanced version of the popular Webalizer HTTP server statistics generator. It's main feature is an ability to discover visitor's country by his/her IP address. Default Webalizer method is to extract host suffix from the reversal DNS query (obtained directly from log files, or by webazolver program if HTTP server doesn't reverses client IPs), which is slow and imprecise (for example, Brazilian host could be reversed as .com). Geolizer relies on the GeoIP library API to do the same thing. Thus, no more DNS queries are required, and results are much more precise. Geolizer also has some additional features: it displays file sizes in a human-readable form (bytes/KB/MB/GB/TB) instead of default kilobytes. It also compiles under MinGW/MSYS now, so you can process your UN*X log files on your Windows box. And, finally, Geolizer features a nice eye-candy: country flags!

Beware as Geolizer also has some bad features (read "bugs"): for example, webazolver won't work anymore, and already resolved hosts aren't handled well. Want to see how it looks like, at all? Take a look at some sample statistics! Or see who else uses Geolizer to produce their server stats.

Tips

The country flag pictures can be downloaded at http://flags.blogpotato.de/. Just download and unzip world.small.zip & special.small.zip to the flags/ subdirectory in your HTML output path.
You may enhance your Webalizer further (allowing it to identify more user agents, referrers and search engines than normal) using extended configuration files, provided by Enric Naval and available at http://griho.udl.es/webalizer/.
It is possible to use multiple configuration files on Webalizer. Just specify them at the command line:
```
webalizer -c common.conf -c user_stas.conf
```
Why don't you try also AWStats & WebDruid?!

It is easy to located an internet service which provides low prices for voip. Simply by downloading the software the service of the voip can be utilized, though for this a fast wireless internet is also required. This is especially benefical for small website hosting companies to contact their clients at a low cost.

X11 FrontEnd for the Rio Utility

Mon, 08 Jan 2007 10:37:08 -0200

X11 FrontEnd for the Rio Utility v1.07 made by guys from the Snowblind Alliance. Surely not the best nor the most beautiful of all GUIs made to manage the famous Rio MP3 Player, but I tried to implement some of the ideas that the "real" managers doesn't implement. List of some "interesting" features:

2 windows side-by-side like in Norton Commander legacy managers
treats M3U playlists as directories
displays the space remaining on the device as you select files to upload
current file & overall progress bars
realtime display of the transfer speed

Note that you need Tk8.0 extension for Perl (and the Perl itself) to get this frontend running! The GUI works under ActivePerl Win32 environment out-of-shelf, but I haven't tested if the interaction with the rio.exe is OK. You can download it here and test for yourself! However, I would suggest you to use my Diamond Rio PMP300 FS-plugin for Total Commander.

P.S. - if you get problems downloading files with long names, apply the patch I provided below on the Rio Utility source (not XRio itself!) and recompile it.

tiny HTTP proxy

Wed, 03 Jan 2007 22:50:00 -0200

This is a tiny and highly experimental HTTP/1.0 proxy software that I have written to debug HTTP protocol & it's clients. It is very small and simple, yet useful to reverse-engineering purposes. It's interface is quite obvious. The Server frame controls the IP, port and connection limit of the proxy server. It also shows how many connections are active at moment. The Data Traffic frame shows in/out packets & bytes. Service frame allows you to stop, start and quit the proxy. These are the very minimalist controls for the very minimalist proxy server.

The interesting stuff begins at the Plugin frame. All the packet passed through this proxy server are forwarded to the selectable plugin module. By default, it is logger.dll. It simply saves every single packet into separate file, which uses the following name scheme: from_IP.from_port-to_IP.to_port.log (for example, 127.0.0.1.4322-127.0.0.1.21.log). The files can be ordered by their modification date in your file explorer, so you can track the entire session:

The logger.dll can be set up to include a sequence counter at the beginning of each packet and to output saved packets into some specific directory:

Plugin module is also capable of injecting packets. Load the replicator.dll file and check the setup screen:

When you click the Capture button and then make some action in your proxied web client, the replicator plugin will prompt you if it got a corresponding packet. This packet may be resent automatically, at the period specified in the Period box. You can capture & replicate several packets, and manipulate their resend period. A very interesting application of the replicator plugin is to flood web chats and to spin up web counters. Of course, the right way is to use logger.dll and to make a clone that imitates the "real" web client.

The final note: this is, and always will be, an alpha-state code. I do not develop this proxy application anymore. It is useful to me the way it is. But you can grab the source and make a whatever plugin you like, or even rewrite the code entirely. I don't care. Just give me the proper credits!

CEP-2-City

Wed, 03 Jan 2007 18:55:33 -0200

Módulo Perl que obtém o nome do município (do Brasil) a partir de um CEP dado. Exemplo:

#!/usr/bin/perl
use CEP;

# inicializa
my $cep = new CEP;

# $city será referência para array com estado/cidade
my $city = $cep->city ('12.437-660'); # processa somente os dígitos numéricos (0-9)

if ($city) {
    # $str será uma string no formato Cidade/ESTADO
    my $str = CEP::city_string ($city);
    # filtra os acentos e imprime em caixa alta
    printf "esse CEP pertence a [%s]\n", uc CEP::normalize ($str);
} else {
    print "CEP não encontrado\n";
}

exit;

Conforme pode ser observado no exemplo dado acima, este é um módulo orientado a objeto. A instância do objeto CEP é criada com new CEP. Durante a inicialização, é construído um array com a lista ordenada das faixas de CEPs (isso pode demorar, portanto é uma boa idéia criar uma única instância e reaproveitá-la indefinidamente). O método que realiza a busca binária pelo CEP e retorna o nome do município é city(). O seu único parâmetro é o número CEP propriamente dito. Somente os dígitos numéricos serão considerados. city() retorna uma referência para array que contém o nome do estado e o nome da cidade, nessa ordem. Inclui também uma subrotina city_string() que recebe como parâmetro o array retornado pelo city() e retorna uma string no formato "Nome da cidade/ESTADO". E, finalmente, quando os acentos são desnecessários, pode-se filtrá-los com a função normalize(), que recebe uma string com acentos e a retorna sem acentos

P.S. - cuidado com os line-endings do arquivo CEP.pm! Se o segmento __DATA__ for salvo com CRLF, o módulo apresentará comportamento estranho em sistemas UN*X!
P.P.S. - Este projeto tem agora um sucessor (que consegue obter informação sobre Rua/Bairro e até mesmo DDD regional)! Confira!

inPEct .EXE binder

Tue, 02 Jan 2007 00:00:00 -0200

inPEct means "infect", applicable to PE ("Portable Executable") format. It is an executable binder, thus, it's able to join two .exe files in one. Now, why should anyone want to do that, is a question apart (screenshot is self-explanatory
At the time I've wrote inPEct, most executable binders were similar to SFX ("Self-Extract") stubs: they simply extracted their content to somewhere (commonly %TEMP% directory). inPEct is a bit different, as it expands the host executable and encrypts & inserts the hosted executable inside it. When someone executes the bound application, the host executable runs normally, and the hosted executable is extracted and then executed. inPEct also has a feature to execute the hosted executable only once ('smart feature'): if the bound program is executed by user again, hosted file won't be extracted anymore. And inPEct is very fast and small, as it's written entirely in pure assembler (in fact, inPEct's loader has only 800 bytes!). It's encryption algorithm is very cheap, but still uses a random seed. Thus, I expect that inPEct is more stealthy than similar binders.
Please note that almost every AntiVirus program detects and quarantines inPEct (and files produced by it)! This shows it's popularity in the past, I guess

But today it's useful mostly as a pure assembler programming example... And for AntiVirus research, as this paper actually shows.

ACFTools (for X-Plane)

Wed, 10 May 2006 01:09:12 -0300

The Plane-Maker from X-Plane v7.x is fun and easy to use... Although I found it a bit limited to edit my planes' fuselage. 20 cross-sections aren't enough, sometimes. It would be nice to export the fuselage shape into any 3D-editor and fine-tune it there... This is exactly what my ACFTools are supposed to do. Please note that X-Plane v8.x is unsupported, unless you create & edit a v7 model and then import it to Plane-Maker v8. But I believe this isn't a problem: X-Plane v8 is able to use OBJ format files (which can be imported/exported by AC3D and Blender plugins) as parts of an aircraft, thus, extremely weird shapes are perfectly possible without even touching the ACF file.
Now, what exactly ACFTools does? It is able to process the file that stores all the aircraft data (except the textures), in the binary ACF format, and dump all the data in the human-readable TXT format. It is the same format as for Tony Gondola's ACF2Text utility, which inspirited my ACFTools. Then, ACFTools can extract the 3D model of the aircraft from this data, and export it in the AC3D format. After that you can edit the aircraft's shape as you want using AC3D and make the inverse process: from .ac to .txt, and then from .txt to .acf. Here comes the brief set of ACFTools features:

Convert from ACF (aircraft) & WPN (weapon) formats to TXT format and vice-versa.
Extract AC3D model from TXT file, along with wings and propellers (using the real airfoils!).
Import AC3D model into TXT file (fuselage, nacelles, wheel fairings & external fuel tanks only)

3D model extractor is also useful if you want to use X-Plane generated aircrafts somewhere else; as in your own Computer Graphics compositions.
ACFTools was written in Perl, thus it is able to work under Linux, MacOS & Windows. And it is Open-Source & highly modular, so you can modify it as you want, or use my functions for your own needs. When you start ACFTools, this is what you get at your console:

##############################################################################
[ACFTools v0.62a] Set of tools to play with ACF files outside of Plane-Maker
Perl script and modules coded by Stanislaw Pusep 
Site of this and another X-Plane projects of mine: http://xplane.sysd.org/

Allows you to:
 * export X-Plane (www.x-plane.com) aircraft data files to human-editable
   plaintext format and 3D mesh editable in AC3D modeler (www.ac3d.org).
 * import plaintext/3D mesh back to ACF file.
##############################################################################

Usage: acftools.exe  [parameters]
 o Commands:
	-extract [DEF]	: extract TXT from ACF (opt: using DEF definition)
        -generate       : generate ACF from TXT
        -merge          : merge body from AC3D file to TXT
 o Parameters:
        -acffile FILE   : name of ACF file to process
        -txtfile FILE   : name of TXT file to process
        -ac3dfile FILE  : name of AC3D file to process
        -noorder        : DO NOT sort vertices while merging bodies
        -noac3d         : DO NOT generate AC3D
        -(min|max)body N: write all bodies in specified range to AC3D
        -force LIST     : force extraction of bodies LIST (comma-separated N)
        -normalize N    : normalize wings to N vert/surface (N>=2 or no wings!)
 o Notes:
        * You can use abbreviations of commands/parameters (-gen or even -g
          instead of -generate).
        * The only required parameter for "extract" command is -acffile.
          Both -txtfile and -ac3dfile are derivated from it.
        * "generate" command and -txtfile has the same relation.
        * By default "extract" uses the latest DEF file.
        * "generate" doesn't need DEF at all (it is implicit in TXT)
        * If file to be created already exists backup is made automatically.
 o Examples:
        acftools.exe --extract=ACF700 --acffile="F-22 Raptor.acf"
        (extract 'F-22 Raptor.txt' from 'F-22 Raptor.acf')

        acftools.exe -e -acf "F-22 Raptor.acf"
        (same as above)

        acftools.exe -me -ac3d ladar.ac -txt "F-22 Raptor.txt"
        (merge *single* 3D body from 'ladar.ac' to 'F-22 Raptor.txt')

        acftools.exe -g -txt "F-22 Raptor.txt"
        (reverse operation; generate 'F-22 Raptor.acf' from 'F-22 Raptor.txt')

The most important thing you should know is that to convert from the binary ACF format to TXT, ACFTools uses one of the files stored in the defs directory. By default, it is a ACF740.def, which works for X-Plane v7.40 and later. You can specify any definition file you want, as shown on the screen above. You can also write your own definition files, if you have the structure specification. Note that to convert TXT back to ACF, no definition is necessary, as the TXT format itself holds all the data necessary to build the binary file. The second thing is to specify the file that ACFTools should convert. The name of the converted file and every of the intermediary files will be generated from this name. When converting from ACF to AC3D formats, TXT file is generated automatically. Please note that when you want to put the edited aircraft part back into the .acf file, you must save this part as a .ac separate file, then merge it into the TXT file, and after that convert it into ACF! Yes, it would be nice to have a GUI to automate the entire process, but I'm too lazy to do that! Anyway, may the source be with you
I strongly recommend you to read the docs\README.txt file contained in the ACFTools package before you start using it!

MD5/SHA1 checksum

Tue, 09 May 2006 12:17:37 -0300

An enhanced file checksum plugin for the Total Commander (TC for short). It supports both MD5 & SHA1 algorithms, and is able to checksum the entire directory trees. Note that it's MD5 checksum function is much faster than TC's internal one (70% faster on my Athlon XP 1700+ with Seagate IDE 160 GB 7200 rpm HD!). Both MD5 & SHA1 algorithms were ripped from PuTTY by Simon Tatham, who implemented them directly from the specification.
Basically, the file checksum plugin integrates the functionality of GNU utilities md5sum and sha1sum into the Total Commander GUI. This is done through the packer extension API: you simply select files/directories you want to checksum, and "Pack" (Alt+F5) them into a .md5 or .sha "archive". It will be a plain text file which looks like this (just the same format as that of above GNU utilities):

3fb2924c8fb8098dbc8260f69824e9c437d28c68  FC4-i386-disc1.iso
31fdc2d7a1f1709aa02c9ea5854015645bd69504  FC4-i386-disc2.iso
032455cdf457179916be3a739ca16add75b768b7  FC4-i386-disc3.iso
f560f26a32820143e8286afb188f7c36d905a735  FC4-i386-disc4.iso
736e1555e88740d6131c5c84fbe69ed1073ba82d  FC4-i386-rescuecd.iso

Note that as TC runs on Windows, checksum plugin will use DOS line endings (CRLF). To "export" the generated checksum list to a UN*X system, you can use my ToFroWin utility, which also integrates itself into TC
Then, to verify files consistence from TC, select .md5 or .sha file and "Test archive" (Shift+Alt+F9). Files generated by *BSD md5 utility are also supported. You can also browse checksum files as they were directories; this is specially useful to locate and check for consistence a single file from the huge directory tree. To do that, just "View" (F3) a file, and TC Lister will pop you a window with content like this:

D:\_INSTALL_\stentz-binary-i386\FC4-i386-rescuecd.iso

expected:	736e1555e88740d6131c5c84fbe69ed1073ba82d
computed:	736e1555e88740d6131c5c84fbe69ed1073ba82d

SHA1 checksum OK!

Check this screenshot to see the checksum plugin in operation!

Installation:

Unzip the "checksum.wcx" to the Total Commander or Windows Commander plugins directory
In Windows Commander 4.0 (or newer) or Total Commander, choose 'Configuration => Options'
Open the 'Packer' page
Click 'Configure packer extension WCXs'
Type md5 as the extension
Click 'New type', and select the "checksum.wcx" file
Click OK and then 'Configure packer extension WCXs'
Now type sha as the extension
Click 'New type', and select the "checksum.wcx" file again
Click OK

Usage:

(This section uses MD5 checksums as example; for SHA1 the procedure is the
same, just replace every "md5" you see by "sha" )

Generate MD5 checksum:
1. Select files you wish to compute checksum.
2. Then go to "Files => Pack".
3. Select "md5" as packer.
4. PLEASE NOTE THAT ARCHIVE PATH WILL BE IGNORED!!! ".md5" 'archive' is ALWAYS generated in current directory (where checked files are), and NOT in the opposite panel! The only exception is creating checksum of the files stored on CD-ROM media as there's no way to create files there.
5. Press OK and check CURRENT directory for ".md5" list generated.
Verify MD5 checksum:
1. Certify that ".md5" list is in it's right place (filenames listed in it should be relative to the current directory).
2. Select it and do "Files => Test Archive(s)".
3. If any file doesn't matches stored MD5 checksum then "CRC error" message box appears.
4. If everything is clear Total Commander remains quiet.
Browse MD5 checksum list:
1. Certify that ".md5" list is in it's right place (filenames listed in it should be relative to the current directory).
2. Select it and enter it as it were a normal archive.
3. If any file is present in the ".md5" list but wasn't found in the current directory then "?" is displayed instead of file date/time and size.
4. PLEASE NOTE THAT FILES CAN NOT BE EXTRACTED TO YOUR DISK! ".md5" isn't an archive, it stores only the hash of the file.
5. Select file you wish to check and press F3 (call Lister).
6. Lister will show complete file name, expected checksum and generated checksum. If both checksum matches then the last line is "MD5 checksum OK!".

Diamond Rio PMP300 FS-plugin

Sat, 06 May 2006 00:26:38 -0300

Diamond Rio PMP300, with only 32 MB of flash memory, was the second portable MP3 player ever released, in 1998. Unfortunately, such a revolutionary piece of hardware is very painful to interface with: as it is connected through parallel port, highest transfer rates achieved were around 80 KB/s. And the software bundled with it was too primitive. To the luck of thousands of (un)happy Rio owners, The Snowblind Alliance released their Open-Source RIO utility, which became a starting point of several alternative Rio manager interfaces. Mine is just one of them
First of all, there's absolutely no need to write the entire file manager. Total Commander (TC for short) is one of the most feature-rich file managers ever made, and it supports a very extensible plugin API. As a result, one could use TC to manage files directly on the flash memory of his/her Rio! Actually, my plugin supports listing, uploading, downloading & deleting files from Diamond Rio PMP300 internal memory. It also displays the transfer speed and the total/remaining space. Take a look at this screenshot to see it in action. Behind the GUI, my plugin uses the source of the "RIO utility v1.07" by The Snowblind Alliance.

Installation:

Just the same as for many other FS-plugins:

Unzip rio.wfx & rio.cfg files to Total Commander directory
Choose "Configuration => Options => Operation => FS-Plugins"
Choose rio.wfx
Click OK.
You can now access the plugin in the "Network Neighborhood"
Open rio.cfg file and set the correct LPT port address (see below for more details)

Please note that DriverLINX Port I/O Driver by Scientific Software Tools, Inc. is required for plugin to operate. Get it below.

Configuration:

In the majority of cases, the plugin may work fine "out-of-the-box". If it doesn't work at all, probably you'll need to discover and specify your PC's parallel port hardware address. Open your system's "Device Manager" (on Windows XP, open the context menu for "My Computer", click "Properties", go to the "Hardware" tab, and click the "Device Manager"). Go straight to "Ports (COM & LPT)". Now locate the port that your Rio device is attached. On my case, it's LPT1. Double-click "Printer port (LPT1)", and go to the "Resources" tab. You need the first one of "I/O Range" numbers:

378 is what you need. Note that this number is in a hexadecimal format. Thus, many programs (like my plugin) may accept it as 0x378. Now, open the rio.cfg file. It looks like this, by default:

# Assume that Rio is connected to LPT1
IOPort		0x378

# default
IODelayInit	20000
IODelayTx	100
IODelayRx	2

# "turbo" mode (UNSAFE!!!)
#IODelayInit	5000
#IODelayTx	1
#IODelayRx	1

Now, just update the IOPort parameter to the value you discovered.
Note all that IODelay* parameters. For the safety reasons, the delays are high by default, and, consequently, the file transfer is slow. If you comment out the default values and uncomment the turbo mode ones, you'll get a great increase in performance! But remember to only use it when your Rio battery is 100% charged, and when your Rio is turned on. It may corrupt some bits, through.

GRP packer plugin

Sat, 06 May 2006 00:19:20 -0300

The .grp (group) file format, used by the game Duke Nukem 3D, is just a collection of a lot of files stored into 1 big one. The Build engine, upon which Duke Nukem 3D was constructed, went on to become one of the most successful engine in terms of number of games released. Other notable games developed using the Build engine include Witchaven, TekWar, Shadow Warrior, Blood, PowerSlave and Redneck Rampage (check for a more complete list and more stuff about the Build engine at http://www.icculus.org/BUILD/). Thus, all of them use the GRP file format
So, here is the plugin I wrote for the Total Commander (TC for short) to access .grp files directly. It is able to list, unpack & pack GRP files (file deletion is unsupported by the format itself...). By the way, this TC plugin is the first one (and probably the only one ever ) to be written in the pure assembler language. I suppose that it's also the smallest TC plugin, with it's 5.5 KB size! And here's a screenshot showing it in action (opening the DUKE3D.GRP).

Installation:

The same as for most TC packer plugins:

Unzip the grp.wcx to the TC directory (usually C:\totalcmd)
Choose 'Configuration - Options'
Open the 'Packer' page
Click 'Configure packer extension DLLs'
type grp as the extension
Click 'new type', and select the "grp.wcx"
Click OK

I.E. 'hidden image' maker

Fri, 05 May 2006 17:47:18 -0300

If you are using Internet Explorer (any version able to load this page , just select the above image (or go to "Edit => Select All", or press Ctrl-A). You may see a watermark with white letters forming a word "TEST". This only happens in IE, due to the specific way it masks the selected images to show their selected state. Firefox, for example, simply tints the image with bluish color. There are lots of jokes one can make using this simple principle. For example, all images on your homepage may have some "subliminal" messages. Adobe PhotoShop is perfectly suitable to make such 'Hidden Images' by hand; in fact, my inspiration was a tutorial made by Matt Kment to do this. But if you are too lazy and/or do not have PhotoShop installed (UN*X users, for example), you can use this small program I wrote in Perl to automate the "steganographic" process. I wrote it using ImageMagick^TM library (so it's required to successfully run the program). It is a command line program, but it is simple enough to use, and it has an advantage to be integrable into your own scripts/programs (you can even setup your server to embed your company logo into all graphics of your site, but this will overload the server's CPU and RAM too quickly). I called my program "Internet Explorer Mask'O'Matic". Take a look at it's startup screen:

Internet Explorer Mask'O'Matic v1.0 by Stas 
Grab yours at http://sysdlabs.hypermart.net/ 

Inspirated by some mad stuff by Lem0nHead
Based on Photoshop 'Hidden Image' Guide (http://www.atomicwienerdog.com/ot/)
made by Matt Kment & suggested to me by xfalmp


ERROR: please give us --visible


 * Usage: MaskOMatic.pl 
 * Options (note that you can use syntaxes like --vis= --hid -out -p):
 --visible filename of image normally seen (required)
 --hidden filename of image seen when selected in IE (required)
 --output filename to write out, format is selected automatically
 using suffix provided (required)
 --percentage float value between 0 & 100; how much of hidden appears
 (optional, defaults to 50%)
 --quality JPEG/MIFF/PNG compression level (optional, DON'T USE!)
 --contrast flag, internal contrast reduction (optional)
 --test filename to dump preview of selected image (optional)

 * Notes:
 # Visible & hidden images doesn't need to have same size, when size
 doesn't matches then hidden image is rescaled using Lanczos filter
 # A huge set of image formats is supported (JPG, GIF, PNG for example)
 but I strongly advice you to write output in loseless format *only*
 (BMP, PNG, TGA) and *then* fine-tune contrast/brightness & save
 compressed in your favourite image editor (like GIMP)

 * Example:
 MaskOMatic.pl --vis bush.jpg --hid death.jpg --out sublim.bmp

Only 3 options are obligatory: --visible, --hidden & --output. You can abbreviate them as -v, -h & -o, respectively. "Visible" is an image that user sees by default. "Hidden" is what user sees when he/she selects the image. And "output" is the resulting image you can embed into your pages. It is also possible to use the "--test" option to preview the selected state of the output image without starting Internet Explorer. If it looks bad, you may play around with "--percentage" option, which specifies the 'weight' of the hidden image. The higher is this value, the greater is the hidden image visibility. If that's not enough to hide your image well (some things are pretty difficult to hide!), you can try to tune the output image with "--contrast" option, but I suggest you to use some GUI program to do that as you get the visual feedback instantly. I also suggest you to always save your output in the non-compressed lossless format (like BMP, TGA, TIFF), and then fine-tune the compression in some program specialized in it (GIMP has a nice compressor with visual feedback).

Alternatives:

Hidden Image Photoshop tutorial
Magic Image Generator C#/VS.NET2003 program (with source)

"ps auwx" faker

Fri, 05 May 2006 01:57:41 -0300

"Process Stack Faker" (psf for short) is able to hide the real executable name and it's parameters from the output of "ps auwx", "ps -ef" & "top" (on UN*X machines), without any superuser privileges. Why should one wish to hide the stuff he/she executes is a complete different topic
Let's take a look at the options that psf itself accepts:

$ ./psf
Process Stack Faker (a.k.a. Fucker) v0.03
Coded by Stas; (C)opyLeft by SysD Destructive Labs, 1997-2003

Usage: psf [options] command arg1 arg2 ...
Where options can be:
-s string fake process name
-p filename file to write PID of spawned process - optional
-d try to start as daemon (in background, no tty) - optional
-l DO NOT exec through link (detectable by 'top'!!!) - optional
-u uid[:gid] (format just like in chown(1)) reset UID/GID - optional
-n priority renice process - optional

Example: psf -s "pine -i" -d -n 19 ./john -session:websrv
$

I hope this is self-explanatory. psf will execute "command arg1 arg2", and it will appear to "ps" & "top" utilities as "string". All other options are... Uhm, optional! They are only useful to detach processes not designed to run as daemons. "-l" is a 'compatibility' switch that disables the weird trick used to override the detection of the real filename by some process listers (notably "top"). The default option may work unexpectingly on some systems (by the way, psf works fine on FreeBSD 4.3, Linux 2.4, NetBSD 1.5 & Solaris 2.7). To test psf, try this:

$ psf -s "pine -i" sleep 30 &
[1] 440
$ ps auwx
...
stas 84 0.0 0.6 2012 1232 pts/0 S 19:12 0:00 bash -rcfile .bashrc
stas 440 0.0 0.1 1204 376 tty2 S 20:09 0:00 pine -i

stas 450 0.0 0.4 2544 816 tty2 R 20:12 0:00 ps auwx
...


"sleep 30"

process was spoofed as "pine -i". Please note the white line between PIDs 440 and 450. This occurs because psf uses whitespace (0x20) characters to shift the original process arguments away from the visible area
To understand how does psf works and learn how to compile it, just read the comments inside the source.

Micro$oft Messenger Hack

Fri, 05 May 2006 01:53:01 -0300

"Micro$oft Messenger Hack" (MSMH for short is a GUI alternative to the command line "net send", with some nice additional features. Please remember that "Messenger" referred here is a Windows NT/2k/XP system service, that "Transmits net send and Alerter service messages between clients and servers. This service is not related to Windows Messenger.". Messages transferred using this service looks just like this one:

MSMH is able to send the same message as above example. It lists machines on the local network, so you won't mistype host names anymore. It can send messages multiple times, also (just imagine yourself flooding "*" . And, using "WinPopup" method, both "From" and "To" fields can be spoofed. By the other side, "net send" method can send messages beyond your LAN, given the IP address of the remote host.
MSMH executable is very small, as I programmed it in assembler language. But beware: Service Packs make the Messenger service disabled by default, and firewalls won't allow remote host to receive your messages. Well, MSMH was much funnier when I wrote it a long time ago

ttysnoop for kernel 2.6

Thu, 04 May 2006 13:09:40 -0300

This project was made by a friend of mine, Vinicius Anselmo. He discontinued it's development (as it showed to be incompatible with later Linux kernels), so I proposed to host his work on my site.

ttysnoop is a small program made by Carl Declerck that allows an administrator to snoop on login terminal through another. It worked until kernel 2.4 because they still with BSD-style pty's support. Here it is a solution for 2.6.

Screenshot:

SSH:

Is ttysnoop compatible with sshd? ttysnoop was created to work with inetd, however, there is a way to make it work with sshd.
First you will need the source code of the sshd. Edit the file configure and add these lines:

LOGIN_PROGRAM="/sbin/ttysnoops"
export LOGIN_PROGRAM

Now it is necessary to verify the paths, so that the new executable uses the same configuration files of your system. For my system I solved making this modification in pathnames.h:

// #ifndef SSHDIR
#define SSHDIR	ETCDIR "/ssh"
// #endif

And executing the script configure specifying a null prefix:

./configure --prefix=

Now compile the program. Make a backup copy of your /usr/sbin/sshd and put your new sshd in the place. That should work. If you are using RedHat or Fedora Core you can try to use my executable (see below).

Bugs:

After log out, it doesn't remove the pseudo-terminal entry. Meaning people showed up as still logged in when they weren't.
I use: who -u | grep -v ?
to see who really is on my system. I don't know how to solve it.

ToFroWin CR/LF converter

Thu, 04 May 2006 13:04:49 -0300

ToFroWin adds the following context menu into Windows Explorer (accessible with right mouse button click over file name):

It simply converts between the text line endings of UN*X (CR or "\n") and DOS (CRLF or "\r\n") systems. Actually this is a Win32 GUI port of Tofrodos Ver 1.7 by Christopher Heng. ToFroWin is also able to convert files in batch: just select multiple files and convert them with one click. Beware to not corrupt binary files!

Installation:
ToFroWin is too small and too simple to make a self-installation for it. It can be easily installed "by hand".
Extract archive to any directory ("C:\Program Files\"). Then go to this directory and execute "install.bat". To uninstall execute "uninstall.bat" and then simply delete ToFroWin files.

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