Metadata-Version: 2.1
Name: kerberos
Version: 1.3.1
Summary: Kerberos high-level interface
Home-page: https://github.com/apple/ccs-pykerberos
Author: Apple Inc.
Author-email: calendarserver-dev@lists.macosforge.org
License: Apache License, Version 2.0
Description: # PyKerberos Package
        
        This Python package is a high-level wrapper for Kerberos (GSSAPI)
        operations.  The goal is to avoid having to build a module that wraps
        the entire Kerberos.framework, and instead offer a limited set of
        functions that do what is needed for client/server Kerberos
        authentication based on <http://www.ietf.org/rfc/rfc4559.txt>.
        
        Much of the C-code here is adapted from Apache's mod_auth_kerb-5.0rc7.
        
        
        ## Build
        
        In this directory, run:
        
        ```
        python setup.py build
        ```
        
        ## Testing
        
        To run the tests in the tests folder, you must have a valid Kerberos setup on
        the test machine. You can use the script .travis.sh as quick and easy way to
        setup a Kerberos KDC and Apache web endpoint that can be used for the tests.
        Otherwise you can also run the following to run a self contained Docker
        container
        
        ```
        docker run \
        -v $(pwd):/app \
        -w /app \
        -e PYENV=2.7.13 \
        -e KERBEROS_USERNAME=administrator \
        -e KERBEROS_PASSWORD=Password01 \
        -e KERBEROS_REALM=example.com \
        -e KERBEROS_PORT=80 \
        ubuntu:16.04 \
        /bin/bash .travis.sh
        ```
        
        The docker command needs to be run in the same directory as this library and
        you can test it with different Python versions by changing the value of the
        PYENV environment value set in the command.
        
        Please have a look at testing_notes.md for more information.
        
        
        ## IMPORTANT
        
        The checkPassword method provided by this library is meant only for testing purposes as it does
        not offer any protection against possible KDC spoofing. That method should not be used in any
        production code.
        
        
        ## Channel Bindings
        
        You can use this library to authenticate with Channel Binding support. Channel
        Bindings are tags that identify the particular data channel being used with the
        authentication. You can use Channel bindings to offer more proof of a valid
        identity. Some services like Microsoft's Extended Protection can enforce
        Channel Binding support on authorisation and you can use this library to meet
        those requirements.
        
        More details on Channel Bindings as set through the GSSAPI can be found here
        <https://docs.oracle.com/cd/E19455-01/806-3814/overview-52/index.html>. Using
        TLS as a example this is how you would add Channel Binding support to your
        authentication mechanism. The following code snippet is based on RFC5929
        <https://tools.ietf.org/html/rfc5929> using the 'tls-server-endpoint-point'
        type.
        
        ```
        import hashlib
        
        def get_channel_bindings_application_data(socket):
            # This is a highly simplified example, there are other use cases
            # where you might need to use different hash types or get a socket
            # object somehow.
            server_certificate = socket.getpeercert(True)
            certificate_hash = hashlib.sha256(server_certificate).hexdigest().upper()
            certificate_digest = base64.b16decode(certificate_hash)
            application_data = b'tls-server-end-point:%s' % certificate_digest
        
            return application_data
        
        def main():
            # Code to setup a socket with the server
            # A lot of code to setup the handshake and start the auth process
            socket = getsocketsomehow()
        
            # Connect to the host and start the auth process
        
            # Build the channel bindings object
            application_data = get_channel_bindings_application_data(socket)
            channel_bindings = kerberos.channelBindings(application_data=application_data)
        
            # More work to get responses from the server
        
            result, context = kerberos.authGSSClientInit(kerb_spn, gssflags=gssflags, principal=principal)
        
            # Pass through the channel_bindings object as created in the kerberos.channelBindings method
            result = kerberos.authGSSClientStep(context, neg_resp_value, channel_bindings=channel_bindings)
        
            # Repeat as necessary
        ```
        
        ## Python APIs
        
        See kerberos.py.
        
        
        ## Copyright and License
        
        Copyright (c) 2006-2021 Apple Inc.  All rights reserved.
        
        This software is licensed under the Apache License, Version 2.0.  The
        Apache License is a well-established open source license, enabling
        collaborative open source software development.
        
        See the "LICENSE" file for the full text of the license terms.
        
Platform: all
Classifier: Development Status :: 5 - Production/Stable
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: Apache Software License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 3
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Classifier: Topic :: System :: Systems Administration :: Authentication/Directory
Description-Content-Type: text/markdown
