Re: [Py2exe-users] link checksum and avast

[Mark H. <ski...@gm...>]

On 12/02/2016 9:38 AM, Gufflet Yves wrote:
> Thanks Dan and Mark for your answers.
> It appears you do not tell the same thing.
> Mark, did you answer on the basis of the forum link I sent, or do you
> know the heart of py2exe ?

It's been quite a few years, but last I recall, py2exe makes no attempt 
to update the checksum after modifying the executable. A quick google 
tells me I said the same thing 6 years ago too :)

https://sourceforge.net/p/py2exe/mailman/message/24637537/

HTH,

Mark


> Dan did you check the checksum with depends.exe or did you assume you
> had no problem with checksum ?
>
> Could you check for your executables what it indicates with depends.exe ?
>
> http://www.dependencywalker.com/
>
> Effectively, I am deploying without python installed and I had a lot of
> problem to incorporate with a manifest the versions 9.0.21022.8 of
> msvcr90.dll (and co). And I thought it was the problem. I used by error
> 32 bits version and then 64 bits version. Still do not work and then I
> saw it was conflicting with AV. I cannot assume that the person do not
> use AV or that an antivirus will not block because of an invalid link
> checksum.
>
> Have you got any idea of a minimal configuration for the build that do
> not generate this link checksum ?
>
> Do you think it is because the dll used at compilation or at runtime are
> not the same and that I am still having problem with dll hell or winsws
> hell ?
>
> Any suggestions ?
>
> Le 11/02/2016 22:08, Mark Hammond a écrit :
>> This is due to how py2exe works - it uses a pre-built stub and appends
>> data to it without attempting to change any checksums. There's not
>> much you can do about that (and probably no value in avast flagging it
>> as a problem either - AV software seems to be in a race to the bottom)
>>
>> Mark
>>
>> On 12/02/2016 4:31 AM, Gufflet Yves wrote:
>>> Hi,
>>>
>>> I generated an executable with py2exe but it fails to run on my machine
>>> when avast is running.
>>> I discovered with Dependency Walker that the "link checksum" for the exe
>>> is in red and differs from the "real checksum"
>>> I am not sure about the origin of the problem (virus or py2exe way of
>>> doing things) neither how to fix it (I cannot guaranty that the final
>>> user will have avast or not)
>>> Any idea ?
>>>
>>> Thanks in advance,
>>>
>>> Yves
>>>
>>> ---
>>> L'absence de virus dans ce courrier électronique a été vérifiée par
>>> le logiciel antivirus Avast.
>>> https://www.avast.com/antivirus
>>>
>>>
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>>
>>
>
>
> ---
> L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
> https://www.avast.com/antivirus
>
>
> ------------------------------------------------------------------------------
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