winkerberos 0.6.0

About

A native Kerberos SSPI client implementation. This module mimics the API of pykerberos to implement Kerberos SSPI authentication on Microsoft Windows. It supports Python 2.6, 2.7, and 3.3+.

Installation

WinKerberos is in the Python Package Index (pypi). Use pip to install it:

python -m pip install winkerberos

Building and installing from source

You must have the correct version of VC++ installed for your version of Python:

• Python 2.6 - Visual Studio 2008 (Professional for 64bit)
• Python 2.7 - Visual Studio 2008 (Professional for 64bit)
• Python 3.3 - Visual Studio 2010 (Professional for 64bit)
• Python 3.4 - Visual Studio 2010 (Professional for 64bit)
• Python 3.5+ - Visual Studio 2015 (Any version)

The Microsoft Visual C++ Compiler for Python 2.7 could also be used to build for Python 2.6 and 2.7.

Once you have the required compiler installed, run the following command from the root directory of the WinKerberos source:

python setup.py install

Building HTML documentation

First install Sphinx:

python -m pip install Sphinx

Then run the following command from the root directory of the WinKerberos source:

python setup.py doc

Examples

This is a simplified example of a complete authentication session following RFC-4752, section 3.1:

import winkerberos as kerberos

def send_response_and_receive_challenge(response):
    # Your server communication code here...
    pass

def authenticate_kerberos(service, user):
    # Initialize the context object with a service principal.
    status, ctx = kerberos.authGSSClientInit(service)

    # GSSAPI is a "client goes first" SASL mechanism. Send the
    # first "response" to the server and recieve its first
    # challenge.
    status = kerberos.authGSSClientStep(ctx, "")
    response = kerberos.authGSSClientResponse(ctx)
    challenge = send_response_and_receive_challenge(response)

    # Keep processing challenges and sending responses until
    # authGSSClientStep reports AUTH_GSS_COMPLETE.
    while status == kerberos.AUTH_GSS_CONTINUE:
        status = kerberos.authGSSClientStep(ctx, challenge)
        response = kerberos.authGSSClientResponse(ctx) or ''
        challenge = send_response_and_receive_challenge(response)

    # Decrypt the server's last challenge
    kerberos.authGSSClientUnwrap(ctx, challenge)
    data = kerberos.authGSSClientResponse(ctx)
    # Encrypt a response including the user principal to authorize.
    kerberos.authGSSClientWrap(ctx, data, user)
    response = kerberos.authGSSClientResponse(ctx)

    # Complete authentication.
    send_response_and_receive_challenge(response)

Viewing API Documentation without Sphinx

Use the help function in the python interactive shell:

>>> import winkerberos
>>> help(winkerberos)