Does RSA work with Python 3?

[parke]

I'm running Python versions 2.7.4 and 3.3.1 on Ubuntu 13.04. I've set up both Python 2 and 3 in separate virtualenv environments so I can install packages as non-root.

I'm running PyTomCrypt 0.6.1 in both virtual environments. I cannot "import tomcrypt.rsa" in Python3. (In Python2 it works fine.)

$ python3
Python 3.3.1 (default, Apr 17 2013, 22:32:14) 
[GCC 4.7.3] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import tomcrypt.rsa
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "tomcrypt.prng.pxd", line 8, in init tomcrypt.rsa (tomcrypt/rsa.c:6174)
  File "tomcrypt.prng.pyx", line 1, in init tomcrypt.prng (tomcrypt/prng.c:2905)
  File "tomcrypt._core.pyx", line 16, in init tomcrypt._core (tomcrypt/_core.c:872)
ValueError: level must be >= 0

[mikeboers]

On first glance, this seems to be related to http://bugs.python.org/issue15610

I'm seriously swamped for a couple days. Mind if I take a little time to try to figure it out, or is this super critical?

If you have the time, I'd try building it from source in your Python 3 environment, as this seems like it might related to the specific version of Cython I use with 2.X not being usable in 3.3... maybe.

The means to build this are somewhat convoluted, but the README describes it.

[parke]

It is not time critical (at present, anyway).

If I have the time, I'll try looking at the build instructions in the README, and I will report any progress I make.

[mikeboers]

I believe that this was fixed with a newer version of Cython, although I was unable to reproduce the issue on my end.

I have rolled a number of fixes in, along with your other issue, and pushed 0.7.0 to the PyPI.

Let me know if that fixes this issue.

[parke]

0.7.0 seems to work with Python 3! Thanks! I'll let you know if I find anything else noteworthy.

[mikeboers]

Great!

Please let me know your thoughts as you use it. I love getting feedback on this project. =]

[parke]

I switched from ctr mode to cbc mode, and got this error:

tomcrypt.LibError: Invalid argument provided.

I guess CBC mode needs the input to be a multiple of the block size. A more descriptive error message would have been helpful.

[mikeboers]

I agree. It is on the TODO list.

Just opened #19 for this.