Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
- Subject: Re: [little OT] Licensing/Implementing in Cocoa/Obj-C
- From: Shaun Wexler <email@hidden>
- Date: Tue, 20 Apr 2004 21:14:44 -0700
On Apr 20, 2004, at 6:27 PM, John Randolph wrote:
>
On Apr 20, 2004, at 5:19 PM, Greg Hurrell wrote:
>
>
> El 21/04/2004, a las 0:49, mmalcolm crawford escribis:
>
>
>
>> As noted a few days ago, this is not an appropriate forum to discuss
>
>> general issues to do with application licensing. Please keep it
>
>> relevant to technical issues for Mac OS X and Cocoa in particular.
>
>>
>
>> mmalc
>
>
>
> The thread started on topic and it has drifted off and back on topic
>
> and off again since then.
>
>
..and more off than on. Really people, it's time to take this to Mac
>
OS X talk or comp.sys.mac.advocacy.
... or email@hidden. I am still intrigued by the thread,
and would like to continue it if we can bring it back into the Cocoa
realm. As a developer using Cocoa, this is quite relevant to me.
Obviously the strength of encryption is one thing, but it seems that
reverse-engineering and patching the code poses a greater risk to the
developer. There are many ways to "break" or "crack" an ObjC app,
stepping thru it with the debugger, etc. A powerful deterrent is
detecting the use of a debugger within the running code itself, and
reacting accordingly. I would certainly like to hear about various
Cocoa obfuscation methods, strategic placement of C functions,
timer-induced callbacks that run on new threads, and other methods of
protecting the license-checking code from being disabled... the
problem of course is that if we discuss it publicly, the script kiddies
also become privy! ;)
--
Shaun Wexler
MacFOH
http://www.macfoh.com
[demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s]
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