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UnpackSDC v1.0


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#1 thunn

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Posted 25 August 2008 - 03:31 PM

The sdc format (Secure Digital Cabinet) is often used to store and distribute software images,
The well known MS File Transfer Manager decrypts the SDC format when files are stored online like this and the process is usually transparent. Lots of MSDNAA media is stored as SDC. ...

Should you ever want to explore the format for yourself,
a developer named imagi now offers a cmd-line tool to unpack sdc files!

get it, and more details,
here:
http://imagi.pl/ :whistling:

--unpacking multi part sdc files is done by copying the file parts together first.
copy /b file1.sdc + file2.sdc file3.sdc

please note,
dotnet 2.0 is required for the program to run.

Attached Files



#2 Brito

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Posted 25 August 2008 - 04:01 PM

This is fun and might be useful for testing purposes.

My school already has a ELMS license but this external extractor might come handy in the future even thought it does require .NET to run properly. I don't like the MS tool that much either.

:whistling:

#3 thunn

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Posted 25 August 2008 - 04:36 PM

I've tested the tool, it works quite well.

here's a quick batch to unpack all .sdc files in the current dir., one by one...

UnpackSDC.cmd :
@echo off

cls &echo.&echo %~n0 &echo.

for %%i in &#40;*.sdc&#41; do &#40;

@for %%d in &#40;%~dp0%%~ni&#41; do &#40;

echo Ready to unpack&#58;

echo %%i &echo.

echo To folder&#58;

echo %%d &echo.

pause &echo.

if not exist &#34;%%d&#34; md &#34;%%d&#34;

unpacksdc.exe &#34;%%i&#34; &#34;%%d&#34;

&#41;

&#41;

pause

this is run next to unpacksdc.exe and at least one .sdc file.

#4 carfan

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Posted 25 August 2008 - 04:50 PM

Hey Thuun, I sent you a pm. Please respond when you get time.

Thanks
-c

#5 felix

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Posted 25 August 2008 - 06:30 PM

@ thunn
This sdc format from what I've seen supports compression right ? but what kind of algorithm does it use ? zlib ? deflate/deflate64 ?
and supports encryption too.
neat.

@ nuno
What's an ELMS license ? I think I've heard it mentioned from my Java tutor but didn't really dig into it.

#6 Brito

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Posted 25 August 2008 - 08:38 PM

It's a sort of of MSDN dedicated for students. (probably better because it's free..)

Provides a licensing scheme for people who want to download and install MS software without need for worrying about licenses as long as MS products are only used for lab experiments within an authorized organization. (thought there isn't much control anyways)

Most teachers I know preferably recommend linux and freeware/open source software as default so this comes as an effective way to make MS software more inviting.. :whistling:

The official site is here: http://www.e-academy...MSDNAA_main.cfm

;)

#7 thunn

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Posted 26 August 2008 - 07:31 AM

SDC is used to encrypt data for online stores.

So.. kinda glad I didn't grab to much attention here.
I stumbled on the whole thing looking for the image for the s08vol iso.

#8 felix

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Posted 26 August 2008 - 08:03 PM

@ nuno
Yup even in my University most teachers espacially those who teach IT recommend Linux mostly Ubuntu. (I'm the admin on the CAD lab so I know what you're talking about) :whistling:

@ thunn
just one more proprietary format from MS.
I talked with a friend of mine who works for MS about the links you posted.
he said it was ok.
so no need to worry as much.
;)

greets

#9 thunn

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Posted 27 August 2008 - 11:18 PM

Here's the tool to make SDC packages:

http://w2.e-academy....SDC_Wrapper.zip

but what kind of algorithm does it use ? zlib ? deflate/deflate64 ?


I've learned SDC stands for Secure Digital Cabinet, not Container, as I thought before. You'll notice if you try the wrapper tool a lite compression is applied along with encryption which seems to provide a stable archive format. I don't yet know much about the compression, but I'm guessing standard zip cabinet or some such format is used.

Unpacksdc is apparently a reverse engineering of the ms dl tool as it uses the same exact decryption algorithms but may yet contain a bug or two as it's release v1.0, the first version.

...v2.0 would be fun to see. :whistling:

-t

#10 Lancelot

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Posted 09 September 2008 - 04:23 AM

thanks thunn :huh: :huh:




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