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Re: [Help] Re: Bug#939181: cycle: Python2 removal in sid/bullseye

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Hi Andreas,

On 16.09.19 11:38, Andreas Tille wrote:
> Hi Peter,
> 
> On Sun, Sep 15, 2019 at 02:47:50PM +0100, peter green wrote:
>>>> tmp = rt.encrypt('Cycle{}'.format(pickle.dumps(objSave)))
>>>
>>> Thanks to this hint
>> This hint was *wrong*, it will introduce garbage into the string and the "rotor" code is clearly designed to work with byte strings, not unicode strings.
>>
>> Change it to
>>
>> "tmp=rt.encrypt( b'Cycle'+pickle.dumps(objSave) )"

Oops, got that backwards. Thanks for spotting this.
 
> Thanks a lot for your patience.  Unfortunately this is not
> yet the final solution:
> 
> ...
> Traceback (most recent call last):
>   File "/usr/bin/cycle", line 83, in OnCloseWindow
>     Save_Cycle(cycle.name, cycle.passwd, cycle.file)
>   File "/usr/share/cycle/save_load.py", line 46, in Save_Cycle
>     tmp=rt.encrypt( b'Cycle'+pickle.dumps(objSave) )
>   File "/usr/share/cycle/p_rotor.py", line 63, in encrypt
>     return self.cryptmore(buf, 0)
>   File "/usr/share/cycle/p_rotor.py", line 88, in cryptmore
>     c = rotors[i][c ^ pos[i]]
> TypeError: unsupported operand type(s) for ^: 'int' and 'float'

That code could be patched by using int() around potentially float
numbers. But honestly, it should better be ripped out and use
real encryption. The docstring tells so:
The rotor module has been removed from the Python 2.4
distribution because

      the rotor module uses an insecure algorithm and is deprecated.
      ==============================================================

Best wishes
Michael

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Bug#939181: [Help] Re: Bug#939181: cycle: Python2 removal in sid/bullseye peter green <plugwash@p10link.net> - 2019-09-15 16:00 +0200
  Bug#939181: [Help] Re: Bug#939181: cycle: Python2 removal in sid/bullseye Andreas Tille <andreas@an3as.eu> - 2019-09-16 11:50 +0200
    Re: [Help] Re: Bug#939181: cycle: Python2 removal in sid/bullseye Michael Kesper <mkesper@schokokeks.org> - 2019-09-16 12:00 +0200
      Re: [Help] Re: Bug#939181: cycle: Python2 removal in sid/bullseye Andreas Tille <andreas@an3as.eu> - 2019-09-18 17:50 +0200

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