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100 lines
3.2 KiB
Text
100 lines
3.2 KiB
Text
# python-ntlm
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Python library that provides NTLM support, including an authentication
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handler for urllib2.
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This library allows you to retrieve content from (usually corporate)
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servers protected with windows authentication (NTLM) using the python
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urllib2.
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## Python 3 Support
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There is work going on to port the library to python 3, you can find it
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in the python30 directory. (at this time it seems to work as good as the
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python 2 library)
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# Usage
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## Simple example
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```python
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import urllib2
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from ntlm import HTTPNtlmAuthHandler
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user = 'DOMAIN\User'
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password = "Password"
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url = "http://ntlmprotectedserver/securedfile.html"
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passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
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passman.add_password(None, url, user, password)
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# create the NTLM authentication handler
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auth_NTLM = HTTPNtlmAuthHandler.HTTPNtlmAuthHandler(passman)
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# create and install the opener
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opener = urllib2.build_opener(auth_NTLM)
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urllib2.install_opener(opener)
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# retrieve the result
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response = urllib2.urlopen(url)
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print(response.read())
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```
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## Extended Example
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```python
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import urllib2
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from urlparse import urlparse, urlunparse
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from ntlm import HTTPNtlmAuthHandler
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user = 'DOMAIN\User'
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password = "Password"
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url = "http://ntlmprotectedserver/securedfile.html"
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# determine a base_uri for which the username and password can be used
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parsed_url = urlparse(self.href)
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base_uri = urlunparse((parsed_url[0],parsed_url[1],"","","",""))
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passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
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passman.add_password(None, base_uri, user, password)
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# create the NTLM authentication handler
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auth_NTLM = HTTPNtlmAuthHandler.HTTPNtlmAuthHandler(passman)
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# other authentication handlers
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auth_basic = urllib2.HTTPBasicAuthHandler(passman)
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auth_digest = urllib2.HTTPDigestAuthHandler(passman)
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# disable proxies (if you want to stay within the corporate network)
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proxy_handler = urllib2.ProxyHandler({})
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# create and install the opener
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opener = urllib2.build_opener(proxy_handler, auth_NTLM, auth_digest,
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auth_basic)
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urllib2.install_opener(opener)
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# retrieve the result
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response = urllib2.urlopen(url)
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print(response.read())
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```
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## Limitations
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* A request using the `HTTPNtlmAuthHandler` has no HTTP status handling, for
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example: redirects are not handled by the opener, you must check and
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handle the response yourself.
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# Resources
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## Inspired by
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* [http://sourceforge.net/projects/ntlmaps/ NTLM Authorization Proxy Server]
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(Dmitri Rozmanov kindly allowed his code to be redistributed under the LGPL)
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The NTLM Authorization Proxy Server can be used to make applications that do
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not support NTLM proxies use them anyway: "Opens up IIS Proxy Servers using
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NTLM to non-Microsoft browsers, etc"
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In contrast the python-ntlm library is used to make it possible for python
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code to retrieve content from an NTLM protected server.
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## References
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* [MS-NLMP]: NT LAN Manager (NTLM) Authentication Protocol Specification
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http://download.microsoft.com/download/a/e/6/ae6e4142-aa58-45c6-8dcf-a657e5900cd3/%5BMS-NLMP%5D.pdf
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* [MS-NTHT]: NTLM Over HTTP Protocol Specification
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http://download.microsoft.com/download/a/e/6/ae6e4142-aa58-45c6-8dcf-a657e5900cd3/%5BMS-NTHT%5D.pdf
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* Optimized Attack for NTLM2 Session Response
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http://www.blackhat.com/presentations/bh-asia-04/bh-jp-04-pdfs/bh-jp-04-seki.pdf
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