requests-credssp 0.1.0

About this library

This package allows for HTTPS CredSSP authentication using the requests library. CredSSP is a Microsoft authentication that allows your credentials to be delegated to a server giving you double hop authentication.

Features

Currently only CredSSP is supported through NTLM with later plans on adding support for Kerberos. CredSSP allows you to connect and delegate your credentials to a computer that has CredSSP enabled.

Installation

requests-credssp supports Python 2.6, 2.7 and 3.3+

Before installing the following packages need to be installed on the system

# for Debian/Ubuntu/etc:
sudo apt-get install gcc python-dev libssl-dev

# for RHEL/CentOS/etc:
sudo yum install gcc python-devel openssl-devel

To install, use pip:

pip install requests-credssp

To install from source, download the source code, then run:

python setup.py install

Requirements

• ntlm-auth

• ordereddict (Python 2.6 Only)

• pyOpenSSL>=16.0.0

• requests>=2.0.0

Usage

import requests
from requests_credssp import HttpCredSSPAuth

credssp_auth = HttpCredSSPAuth('domain\\user', 'password', auth_mechanism='ntlm')
r = requests.get("https://server:5986/wsman", auth=credssp_auth)
...

import requests
from requests_credssp import HttpCredSSPAuth

credssp_auth = HttpCredSSPAuth('domain\\user', 'password', auth_mechanism='ntlm', disable_tlsv1_2=True)
r = requests.get("https://server:5986/wsman", auth=credssp_auth)
...

import requests
from requests_credssp import HttpCredSSPAuth

# build the auth request and sent an empty message to authenticate
session = requests.Session()
session.auth = HttpCredSSPAuth('domain\\user', 'password')

request = requests.Request('POST', 'https://server:5986/wsman', data=None)
prepared_request = self.session.prepare_request(request)
response = session.send(prepared_request)

# encrypt the message using the wrap command
message = b'hi server'
encrypted_message = session.auth.wrap(message)

# send the encrypted message and get the encrypted response
request = requests.Request('POST', 'https://server:5986/wsman', data=encrypted_message)
prepared_request = self.session.prepare_request(request)
response = session.send(prepared_request)

# decrypt the encrypted response from the server
encrypted_response = response.content
decrypted_response = session.auth.unwrap(encrypted_response)

Logging

This library uses the standard Python logging facilities. Log messages are logged to the requests_credssp and requests_credssp.credssp named loggers.

If you are receiving any errors or wish to debug the CredSSP process you should enable DEBUG level logs. These logs show fine grain information such as the protocol and cipher negotiated in the TLS handshake as well as any non confidential data such as the 1st 2 NTLM messages sent and received in the auth process.

Backlog

• Add support for Kerberos authentication

• Once above is added, auto detect which version to use, preference Kerberos over NTLM

• Replace dependency of pyOpenSSL if possible with inbuilt functions in Python

• Add support for different credential types like smart card and redirected credentials