Thank you all for this detailed feedback!
Yes, I am aware of the decompilers and the pyc format is not the only level of
protection that I am relying on.
But it looks like having 3 different pyc files for Python 2.5, 2.6 and 2.7 and
implementing some logic that loads the correct one automatically is a
reasonable amount of effort for a basic level of protection.
In case anybody is interested: I think automatically loading the correct pyc
file could be based on the imp.get_magic().encode('hex')
idea sketched in the second answer here:
http://stackoverflow.com/questions/2263356/are-python-2-5-pyc-files-compatible-with-python-2-6-pyc-files
Cheers,
Mathias
mamoworld.com
simplify your cgi
Dr. Mathias Möhl
Marlow 52 , 18551 Sagard, Germany
Phone +49 (0)38302 - 88 75 61
i...@mamoworld.com
On 07 Mar 2014, at 00:34, Ben Dickson <ben.dick...@rsp.com.au> wrote:
> Yep, pyc files can be converted back to Python relatively easily
> http://stackoverflow.com/questions/5287253
>
> ..but FWIW, here are the Python or GCC changes throughout Nuke:
>
> Nuke 5.1v4, 64 bit, built Apr 3 2009.
> 2.5.1 (r251:6028:6057M, Mar 14 2008, 16:54:54)
> [GCC 3.4.6 20060404 (Red Hat 3.4.6-8)]
>
> Nuke 5.2v1, 64 bit, built Aug 25 2009.
> 2.5.1 (r251:13849M, Dec 2 2008, 17:16:32)
> [GCC 4.1.2]
>
> Nuke 6.2v1, 64 bit, built Dec 17 2010.
> Licence expires on: 2014/4/10
> 2.6.5 (r265:30763M, Dec 8 2010, 09:13:05)
> [GCC 4.1.2]
>
> Nuke 8.0v1, 64 bit, built Dec 2 2013.
> 2.7.3 (default, Sep 18 2013, 15:32:05)
> [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)]
>
>
> Based of the Linux version. Didn't check if the Python UCS version
> changed at all, but I doubt it
>
> On 07/03/14 06:38, Nathan Rusch wrote:
>> Trying to protect "IP" written in pure Python is a losing battle. If
>> you’re really paranoid, consider implementing parts of your code in C.
>>
>> As far as versions go, it should be safe to assume that all versions of
>> Nuke 8.0 will use Python 2.7. I believe Nuke 6.2 was the first version
>> to use Python 2.6, but that’s going purely on memory. Prior to that, it
>> was 2.5.
>>
>>
>> -Nathan
>>
>>
>> *From:* Mathias Möhl <mailto:i...@mamoworld.com>
>> *Sent:* Thursday, March 06, 2014 11:35 AM
>> *To:* nuke-python@support.thefoundry.co.uk
>> <mailto:nuke-python@support.thefoundry.co.uk>
>> *Subject:* [Nuke-python] python versions used by NUKE
>>
>> Hi everyone,
>>
>> I want to distribute some NUKE python script as pyc file to protect my IP.
>>
>> As pyc files are not compatible among different python versions, I need
>> a different pyc file for each version of python that is used by NUKE.
>>
>> Is it save to assume that
>> NUKE 8 always uses Python 2.7,
>> NUKE 7 always uses Python 2.6,
>> and which other Python versions do I need to consider for earlier NUKE
>> versions?
>>
>> Cheers,
>> Mathias
>>
>>
>> ------------------------------------------------------------------------
>> *mamoworld.com <http://mamoworld.com>
>> simplify your cgi*
>>
>> Dr. Mathias Möhl
>> Marlow 52 , 18551 Sagard, Germany
>> Phone +49 (0)38302 - 88 75 61
>> i...@mamoworld.com <mailto:i...@mamoworld.com>
>>
>>
>>
>> ------------------------------------------------------------------------
>> _______________________________________________
>> Nuke-python mailing list
>> Nuke-python@support.thefoundry.co.uk, http://forums.thefoundry.co.uk/
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>>
>>
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>
> --
> ben dickson
> 2D TD | ben.dick...@rsp.com.au
> rising sun pictures | www.rsp.com.au
> _______________________________________________
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