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<TITLE> [pycrypto] _fastmath None !!
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<H1>[pycrypto] _fastmath None !!</H1>
<B>jd</B>
<A HREF="mailto:pycrypto%40lists.dlitz.net?Subject=%5Bpycrypto%5D%20_fastmath%20None%20%21%21&In-Reply-To="
TITLE="[pycrypto] _fastmath None !!">jdsw2002 at yahoo.com
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<I>Tue May 18 22:17:52 CST 2010</I>
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<PRE>Ok... here is attached program.
The problem seems to be
a. Either package specific (pycrypto package installed using easy_install and/or from rpm as dependency from paramiko.)
I use virtual env, and when I install pycrypto using easy_install, the _fastmath.so is not present in the egg.
b. serialization of keys in to file.
Basically, if u run the attached program it works on all my test machines.
If you create the keys and save them on one machine, and try to read them (comment the key generation, saving part), then it does not work on some machines.
I am using picke and base64, to my knowledge both should work across m/c architecture (32bit, 64bit) and different python versions. Or I am mistaken ?
One observation is that the keys generated and saved on a 32 bit machines are running in to the problem when read on a 64 bit machine. But if I generate it on a 64 bit machine.. it seems to work on a 32 bit machine.
NOTE: This is just one variable... the machines have different python version, different linux distro..etc.
Thanks in advance.
/Jd
p.s. I am going to switch serialization and see if that helps.
--- On Tue, 5/18/10, Lorenz Quack <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">don at amberfisharts.com</A>> wrote:
><i> From: Lorenz Quack <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">don at amberfisharts.com</A>>
</I>><i> Subject: Re: [pycrypto] _fastmath None !!
</I>><i> To: "PyCrypto discussion list" <<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>>
</I>><i> Date: Tuesday, May 18, 2010, 3:20 AM
</I>><i> Hi
</I>><i>
</I>><i> On 05/18/2010 08:19 AM, jd wrote:
</I>><i> >
</I>><i> > Hi Lorenz,
</I>><i> >     Thanks for quick response.
</I>><i> >
</I>><i> > It is happening on someone else's machine, I have
</I>><i> requested them to check and send me details.
</I>><i> >
</I>><i> > In the mean time I looked that the code.
</I>><i> > In RSA.py
</I>><i> >
</I>><i> > try:
</I>><i> >      from Crypto.PublicKey import
</I>><i> _fastmath
</I>><i> > except ImportError:
</I>><i> >      _fastmath = None
</I>><i> >
</I>><i> >
</I>><i> > Could this be problem ?
</I>><i>
</I>><i> I don't think so. That should happen when PyCrypto was
</I>><i> compiled without gmp support.
</I>><i> According to my analysis the relevant parts are the
</I>><i> __setstate__ method in the class _RSAobj
</I>><i> and the __init__ in the class RSAImplementation.
</I>><i> In the __init__ the attribute _math is set which is later
</I>><i> being accessed by both the construct
</I>><i> method and in the _RSAobj.__setstate__ method.
</I>><i> The way the _math attribute is set seems pretty safe to me
</I>><i> so I believe things must be going
</I>><i> astray somewhere else. But it's hard to tell without any
</I>><i> code.
</I>><i>
</I>><i> cheers
</I>><i> //Lorenz
</I>><i>
</I>><i>
</I>><i> > Thanks
</I>><i> > /Jd
</I>><i> >
</I>><i> >
</I>><i> > --- On Mon, 5/17/10, Lorenz Quack<<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">don at amberfisharts.com</A>> 
</I>><i> wrote:
</I>><i> >
</I>><i> >> From: Lorenz Quack<<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">don at amberfisharts.com</A>>
</I>><i> >> Subject: Re: [pycrypto] _fastmath None !!
</I>><i> >> To: "PyCrypto discussion list"<<A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>>
</I>><i> >> Date: Monday, May 17, 2010, 8:40 AM
</I>><i> >> Hi again,
</I>><i> >>
</I>><i> >> no idea what's going wrong. normally pycrypto
</I>><i> should fall
</I>><i> >> back to _slowmath (a pure python implementation)
</I>><i> when gmp is
</I>><i> >>
</I>><i> >> not installed meaning _fastmath is not available
</I>><i> (_fastmath
</I>><i> >> is a C implementation using gmp).
</I>><i> >>
</I>><i> >> Maybe you could prvide some more information, like
</I>><i> python
</I>><i> >> version, pycrypto version, is gmp installed?
</I>><i> >> Also it would be a good idea to provide a
</I>><i> >> small/minimalistic example demonstrating the
</I>><i> problem.
</I>><i> >> That way it is easyier to figure out if it's a bug
</I>><i> in
</I>><i> >> pycrypto or in your code.
</I>><i> >>
</I>><i> >> cheers,
</I>><i> >> //Lorenz
</I>><i> >>
</I>><i> >>
</I>><i> >>
</I>><i> >> On 05/17/2010 04:48 PM, jd wrote:
</I>><i> >>> Hi Guys
</I>><i> >>>        I am serializing
</I>><i> the pycrypto keys
</I>><i> >> using pickle.. as suggested in one of recent
</I>><i> posts. It is
</I>><i> >> working fine, but giving following problem on
</I>><i> cenos 5.1.
</I>><i> >> (stack at the bottom of email)
</I>><i> >>>
</I>><i> >>> 'NoneType' object has no attribute
</I>><i> 'rsa_construct'
</I>><i> >>>
</I>><i> >>>
</I>><i> >>>        I looked at the
</I>><i> code.. it seems
</I>><i> >> while constructing _fastmath is used. Any
</I>><i> workarounds /
</I>><i> >> fixes ? I do not think changing to saving tuple
</I>><i> would help
</I>><i> >> as it would also need to use __setstate__..
</I>><i> >>>
</I>><i> >>> Help is greatly appreciated.
</I>><i> >>> Thanks
</I>><i> >>> /Jd
</I>><i> >>>
</I>><i> >>> File "/tg2env/bin/paster", line 7, in ?
</I>><i> >>>        sys.exit(
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteScript-1.7.3-py2.4.egg/paste/script/command.py",
</I>><i> >> line 84, in run
</I>><i> >>>        invoke(command,
</I>><i> command_name,
</I>><i> >> options, args[1:])
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteScript-1.7.3-py2.4.egg/paste/script/command.py",
</I>><i> >> line 123, in invoke
</I>><i> >>>        exit_code =
</I>><i> runner.run(args)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteScript-1.7.3-py2.4.egg/paste/script/command.py",
</I>><i> >> line 218, in run
</I>><i> >>>        result =
</I>><i> self.command()
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteScript-1.7.3-py2.4.egg/paste/script/serve.py",
</I>><i> >> line 276, in command
</I>><i> >>>        relative_to=base,
</I>><i> >> global_conf=vars)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteScript-1.7.3-py2.4.egg/paste/script/serve.py",
</I>><i> >> line 311, in loadapp
</I>><i> >>>        return loadapp(
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/loadwsgi.py",
</I>><i> >> line 204, in loadapp
</I>><i> >>>        return loadobj(APP,
</I>><i> uri,
</I>><i> >> name=name, **kw)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/loadwsgi.py",
</I>><i> >> line 225, in loadobj
</I>><i> >>>        return
</I>><i> context.create()
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/loadwsgi.py",
</I>><i> >> line 625, in create
</I>><i> >>>        return
</I>><i> >> self.object_type.invoke(self)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/loadwsgi.py",
</I>><i> >> line 110, in invoke
</I>><i> >>>        return
</I>><i> fix_call(context.object,
</I>><i> >> context.global_conf, **context.local_conf)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/tg2env/lib/python2.4/site-packages/PasteDeploy-1.3.3-py2.4.egg/paste/deploy/util/fixtypeerror.py",
</I>><i> >> line 57, in fix_call
</I>><i> >>>        val =
</I>><i> callable(*args, **kw)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/m2svn/trunk/src/app/web/app/app/config/middleware.py",
</I>><i> >> line 46, in make_app
</I>><i> >>>        if
</I>><i> verify_license():
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/m2svn/trunk/src/app/web/app/app/core/utils/utils.py",
</I>><i> line
</I>><i> >> 2221, in verify_license
</I>><i> >>>        l_info =
</I>><i> >> read_license_using_embeded(license_file)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/m2svn/trunk/src/app/web/app/app/core/utils/utils.py",
</I>><i> line
</I>><i> >> 2202, in read_license_using_embeded
</I>><i> >>>        pub_key
</I>><i> =get_embeded_key()
</I>><i> >>>      File
</I>><i> >>
</I>><i> "/m2svn/trunk/src/app/web/app/app/core/utils/utils.py",
</I>><i> line
</I>><i> >> 2197, in get_embeded_key
</I>><i> >>>        key =
</I>><i> pickle.loads(str)
</I>><i> >>>      File
</I>><i> "/usr/lib64/python2.4/pickle.py",
</I>><i> >> line 1394, in loads
</I>><i> >>>        return
</I>><i> Unpickler(file).load()
</I>><i> >>>      File
</I>><i> "/usr/lib64/python2.4/pickle.py",
</I>><i> >> line 872, in load
</I>><i> >>>       
</I>><i> dispatch[key](self)
</I>><i> >>>      File
</I>><i> "/usr/lib64/python2.4/pickle.py",
</I>><i> >> line 1237, in load_build
</I>><i> >>>        setstate(state)
</I>><i> >>>      File
</I>><i> >>
</I>><i> "build/bdist.linux-x86_64/egg/Crypto/PublicKey/RSA.py",
</I>><i> line
</I>><i> >> 171, in __setstate__
</I>><i> >>> AttributeError: 'NoneType' object has no
</I>><i> attribute
</I>><i> >> 'rsa_construct'
</I>><i> >>>
</I>><i>
</I>><i> _______________________________________________
</I>><i> pycrypto mailing list
</I>><i> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">pycrypto at lists.dlitz.net</A>
</I>><i> <A HREF="http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto">http://lists.dlitz.net/cgi-bin/mailman/listinfo/pycrypto</A>
</I>><i>
</I>
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