An implementation of Authenticated Headers in a Software-Defined Network Environment

The cryptography package requires dependencies that are not provided by the default python package on the Mininet Ubuntu distro. Instructions are provided for installing the necessary packages and modules.

You can clone this repo and run the commands from within the three root directories: six cffi libffi cryptography.

I don't think the mininet environment supports outside internet activity so these would need to be imported via a Shell connection or localhost file transfer.

Note: There are extra developer modules that these packages depend on for installation and setup, however the current distro of mininet should be adequate enough to support them all.

Six is the first Python library needed for running the cryptography python module. Run the python setup.py install from within the six directory and be sure that the module can be imported via the python interpreter;

mininet:$ python
>>> import six
>>>

Next you want to install the libffi python library package. You can use the one available but it might be easier to just clone it from the the libffi repository.

If you use the version source code to build libffi you must run the ./autogen.sh command and then run ./configure.

Once configure has finished, type make. Note that you must be using GNU make. You can ftp GNU make from ftp.gnu.org:/pub/gnu/make Ensure texinfo is installed: apt-get install texinfo

To ensure that libffi is working as advertised, type make check. This will require that you have DehaGNU installed.

To install the library and header files, type make install.

Navigate to the cffi directory.

Ensure you have the python-dev package. Run sudo apt-get install python-dev After the python-dev finishes install use the command python setup_base.py install.

Python-Dev may have to be manually imported from another machine.

You should now be able to import both Python modules via the interpreter

mininet:$ python
>>> import six
>>> import cffi

Navigate to the cryptography directory

Run the python setup.py install command.

After necessary packages and modules are imported you should be able to run the following commands with no errors from within the python interpreter or via a Python script.

>>> from cryptography.fernet import Fernet
>>> # Put this somewhere safe!
>>> key = Fernet.generate_key()
>>> f = Fernet(key)
>>> token = f.encrypt(b"Secret Message")
>>> token
>>> f.decrypt(token)
'Secret Message'

You can find more information in the documentation.

Using the PyCrypto library for asymmetric cryptography

Run the python setup.py install command.