[PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Dear Friends I have a Query. Is it Possible to extract the source code from .exe,(VB,'C',C++),.dll(VB,'C',C++) or .class(java) files. A Utility program which can be written which will extract .exe-.c source code conversion or .exe-com or .exe-.frm files,.dll-.cpp,.dll-.c source code Or is it Virtually Impossible to extract the source code ??? Do the System Level Programmers who are writing compilers,interpretors,operating systems,Device Drivers,TSR,Anti-Virus Packages, Programmers who know machine language and assembly language very well can they extract the source code? Thanks, Prashant A
Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Prashant Akerkar wrote: Is it Possible to extract the source code from .exe, ... .class(java) files. [ I think you're way off-topic but... ] Nope. But you can try to decompile binaries or java class files. Try googling for decompilation tools Note that decompiling softs can be prohibited by law enforcements (not in Europe for interoperability reasons, but well in the US). Result from decompilation is not source code of course, can be made very difficult, and result is very different from src code. In particular case of java class files, decompilation can lead to really good results (with bad-looking variable names tough) Christophe -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Dear Christophe My Point is like this .c source code/file/s - .obj file/s is done by the C compiler .obj file/s -- .exe binary file is done by the Linker(Assembly Language) In the same way can we do the following steps to extract the .c source code/files as follows Step 1 : .exe binary file -- Linker (assembly language) .. .obj file/s Step 2 :.obj file/s .c (Compiler) source code file/s Is it Right or i am going somewhere illogical? Awaiting Your Prompt Reply, Thanks Regards, Prashant A - Original Message - From: Christophe Chisogne [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Thursday, November 13, 2003 6:46 PM Subject: Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class) Prashant Akerkar wrote: Is it Possible to extract the source code from .exe, ... .class(java) files. [ I think you're way off-topic but... ] Nope. But you can try to decompile binaries or java class files. Try googling for decompilation tools Note that decompiling softs can be prohibited by law enforcements (not in Europe for interoperability reasons, but well in the US). Result from decompilation is not source code of course, can be made very difficult, and result is very different from src code. In particular case of java class files, decompilation can lead to really good results (with bad-looking variable names tough) Christophe -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
[snip] Step 1 : .exe binary file -- Linker (assembly language) .. .obj file/s Step 2 :.obj file/s .c (Compiler) source code file/s Is it Right or i am going somewhere illogical? [/snip] Really this cannot be done with any degree of reliability, if at all. The .obj file has been stripped of things and has had additional code placed into it. This is dependent upon the compiler (.obj files from compiler to compiler have different looks to them based on several items. Makefiles are different.).The .exe file is a translation of the .obj into assembly language. Does the compiled code you want to use have hooks into it, an API? If so you can use PHP to interact with the API. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Dear Mr Jay Blanchard That is exactly my Point of Argument. Programmers who are well versed with assembly language and Programmers who have written C Compilers should be knowing the Process of Delinking and as well as Decompiling? Is it not possible for the Programmer who has written C Compiler(Who is also an assembly Language Expert) say on Unix or Windows then why not he will be able to do the reverse engineering Process of extracting the source code with 100% Reliability ?? I feel so that he should succeed with the Reverse Engineering Process of Extracting the original source code(.c files) from .exe binary file. Are you getting my Point? Pls give your opinion on this asap Thanks, Prashant A - Original Message - From: Jay Blanchard [EMAIL PROTECTED] To: Prashant Akerkar [EMAIL PROTECTED]; Christophe Chisogne [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Thursday, November 13, 2003 7:08 PM Subject: RE: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class) [snip] Step 1 : .exe binary file -- Linker (assembly language) .. .obj file/s Step 2 :.obj file/s .c (Compiler) source code file/s Is it Right or i am going somewhere illogical? [/snip] Really this cannot be done with any degree of reliability, if at all. The .obj file has been stripped of things and has had additional code placed into it. This is dependent upon the compiler (.obj files from compiler to compiler have different looks to them based on several items. Makefiles are different.).The .exe file is a translation of the .obj into assembly language. Does the compiled code you want to use have hooks into it, an API? If so you can use PHP to interact with the API. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Is it Right or i am going somewhere illogical? Basically, source code is a convenient way to represent in a human readable form what the machine is supposed to do. Unless you happen to be debugging it is unlikely that the source code will be saved within the compiled file. The problem is that there are many places in code which are either irrelevant to the compiler (i.e. variable names) or could be many things -- i.e. the code from all your headers and includes is combine and you'll have problems figuring out what's what. Think of it like blue prints. You can recreate the original thing from the blue prints, but anybody trying to create blueprints for the original thing might create something different -- that can still be used to assemble the original thing. -Dan -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Extracting Source code from Binary Files(.dll,.exe.,class)
Prashant Akerkar wrote: I have a Query. Is it Possible to extract the source code from .exe,(VB,'C',C++),.dll(VB,'C',C++) or .class(java) files. To some extent. All that's left intact by the compiler is the logic, not the exact source code. In theory, a utility to transform machine code logic into C (or another high-level language), but you wouldn't get the exact source code you compiled. -- The above message is encrypted with double rot13 encoding. Any unauthorized attempt to decrypt it will be prosecuted to the full extent of the law. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
