unpack and recompile gives error

alaa2003 · 29th October 2015, 07:38

Hello
i noticed in case we unpack nsis package installer we will got its files + nsi script
in case trying to recompile again it gives error even without Modification !!
Example:
i uploaded .exe package + i unpacked it
if try to recompile again will got errors
how to fix these errors in the uploaded

https://www.sendspace.com/file/1nlrys

Yathosho · 29th October 2015, 08:14

If this is a serious help request, read Can I decompile an existing installer?

The download was reported as harmful by Chrome, so everybody downloading the file be careful.

stass · 29th October 2015, 08:23

Excerpted from the installer script, [NSIS] .nsi - it's not the original script !

alaa2003 · 29th October 2015, 08:25

Thank you for quick answer
the link included both .exe and unpacked folder too used 7zip
i re uploaded files to another host
http://www53.zippyshare.com/v/5jUlH63j/file.html

Anders · 29th October 2015, 13:17

And did you download this decompiler from our webpage? No? We never promised that you could decompile anything.

At best the decompiled script you got from a 3rd-party could be a starting point if you need to rewrite your script in case you lost the original source.

alaa2003 · 3rd November 2015, 11:41

thx Anders for your answer which is very iseful
i studied this subject well and made bellow :
1- using "exe extractor" i could get "script.bin" file
2- downloaded last version of thirdparty decopiler "nsiDecomp#3.7z"
3- on windows 8.1 i installed python for windows from official site "Python34"
4- i copied script.bin into extracted folder nsiDecomp#3
5- from CMD as administrator i executed command " nsiDecomp.py script.bin"
but got error
C:\Python34>python.exe nsiDecomp.py
File "nsiDecomp.py", line 107
return(Long(~value) & 0x80000000L )
^
http://prntscr.com/8yj0q6

please note i tried the "script.bin" which included in Decompile program as example
what is the wrong step i make ?

alaa2003 · 9th November 2015, 09:46

ok , after study cmd scripts i could understand a lot of things
i manually copied extracted script.bin to path example\Sample2
and empty all data inside file example\Sample2\!Decompiled\script.bin.nsi
then executed cmd nsiDecomp.cmd
but found there is wrong code appear of nsiDecomp.py it self
even if tried with your attached samples !

error print screen
http://prntscr.com/90qhne

python installed is 3.4.3 + windows 8.1 x64

alaa2003 · 10th November 2015, 08:36

update:
i downgraded to the mentioned python version and applied decompile again
it works great with given samples
but with script i attach it gives error and stop
how can solve
http://prntscr.com/913x57

script: http://www30.zippyshare.com/v/sF6Roz9X/file.html

29th October 2015, 07:38	#1
alaa2003 Junior Member Join Date: Oct 2015 Posts: 5	unpack and recompile gives error Hello i noticed in case we unpack nsis package installer we will got its files + nsi script in case trying to recompile again it gives error even without Modification !! Example: i uploaded .exe package + i unpacked it if try to recompile again will got errors how to fix these errors in the uploaded https://www.sendspace.com/file/1nlrys

29th October 2015, 08:14	#2
Yathosho Forum King Join Date: Jan 2002 Location: AT-DE Posts: 3,366	If this is a serious help request, read Can I decompile an existing installer? The download was reported as harmful by Chrome, so everybody downloading the file be careful. NSIS IDE for Atom \| NSIS for Visual Studio Code \| NSIS for Sublime Text \| NSIS.docset

29th October 2015, 13:17	#5
Anders Moderator Join Date: Jun 2002 Location: ${NSISDIR} Posts: 5,449	And did you download this decompiler from our webpage? No? We never promised that you could decompile anything. At best the decompiled script you got from a 3rd-party could be a starting point if you need to rewrite your script in case you lost the original source. IntOp $PostCount $PostCount + 1

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29th October 2015, 08:23	#3
stass Senior Member Join Date: Nov 2012 Posts: 166	Excerpted from the installer script, [NSIS] .nsi - it's not the original script !

29th October 2015, 08:25	#4
alaa2003 Junior Member Join Date: Oct 2015 Posts: 5	Thank you for quick answer the link included both .exe and unpacked folder too used 7zip i re uploaded files to another host http://www53.zippyshare.com/v/5jUlH63j/file.html

3rd November 2015, 11:41	#6
alaa2003 Junior Member Join Date: Oct 2015 Posts: 5	thx Anders for your answer which is very iseful i studied this subject well and made bellow : 1- using "exe extractor" i could get "script.bin" file 2- downloaded last version of thirdparty decopiler "nsiDecomp#3.7z" 3- on windows 8.1 i installed python for windows from official site "Python34" 4- i copied script.bin into extracted folder nsiDecomp#3 5- from CMD as administrator i executed command " nsiDecomp.py script.bin" but got error C:\Python34>python.exe nsiDecomp.py File "nsiDecomp.py", line 107 return(Long(~value) & 0x80000000L ) ^ http://prntscr.com/8yj0q6 please note i tried the "script.bin" which included in Decompile program as example what is the wrong step i make ?

9th November 2015, 09:46	#7
alaa2003 Junior Member Join Date: Oct 2015 Posts: 5	ok , after study cmd scripts i could understand a lot of things i manually copied extracted script.bin to path example\Sample2 and empty all data inside file example\Sample2\!Decompiled\script.bin.nsi then executed cmd nsiDecomp.cmd but found there is wrong code appear of nsiDecomp.py it self even if tried with your attached samples ! error print screen http://prntscr.com/90qhne python installed is 3.4.3 + windows 8.1 x64

10th November 2015, 08:36	#8
alaa2003 Junior Member Join Date: Oct 2015 Posts: 5	update: i downgraded to the mentioned python version and applied decompile again it works great with given samples but with script i attach it gives error and stop how can solve http://prntscr.com/913x57 script: http://www30.zippyshare.com/v/sF6Roz9X/file.html