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# This library is free software: you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation, either
# version 3 of the License, or (at your option) any later version.
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/> or <http://www.gnu.org/licenses/lgpl.txt>.
import urllib2
import httplib, socket
from urllib import addinfourl
import ntlm
class AbstractNtlmAuthHandler:
def __init__(self, password_mgr=None, debuglevel=0):
if password_mgr is None:
password_mgr = HTTPPasswordMgr()
self.passwd = password_mgr
self.add_password = self.passwd.add_password
self._debuglevel = debuglevel
def set_http_debuglevel(self, level):
self._debuglevel = level
def http_error_authentication_required(self, auth_header_field, req, fp, headers):
auth_header_value = headers.get(auth_header_field, None)
if auth_header_field:
if auth_header_value is not None and 'ntlm' in auth_header_value.lower():
fp.close()
return self.retry_using_http_NTLM_auth(req, auth_header_field, None, headers)
def retry_using_http_NTLM_auth(self, req, auth_header_field, realm, headers):
user, pw = self.passwd.find_user_password(realm, req.get_full_url())
if pw is not None:
# ntlm secures a socket, so we must use the same socket for the complete handshake
headers = dict(req.headers)
headers.update(req.unredirected_hdrs)
auth = 'NTLM %s' % ntlm.create_NTLM_NEGOTIATE_MESSAGE(user)
if req.headers.get(self.auth_header, None) == auth:
return None
headers[self.auth_header] = auth
host = req.get_host()
if not host:
raise urllib2.URLError('no host given')
h = None
if req.get_full_url().startswith('https://'):
h = httplib.HTTPSConnection(host) # will parse host:port
else:
h = httplib.HTTPConnection(host) # will parse host:port
h.set_debuglevel(self._debuglevel)
# we must keep the connection because NTLM authenticates the connection, not single requests
headers["Connection"] = "Keep-Alive"
headers = dict((name.title(), val) for name, val in headers.items())
h.request(req.get_method(), req.get_selector(), req.data, headers)
r = h.getresponse()
r.begin()
r._safe_read(int(r.getheader('content-length')))
if r.getheader('set-cookie'):
# this is important for some web applications that store authentication-related info in cookies (it took a long time to figure out)
headers['Cookie'] = r.getheader('set-cookie')
r.fp = None # remove the reference to the socket, so that it can not be closed by the response object (we want to keep the socket open)
auth_header_value = r.getheader(auth_header_field, None)
(ServerChallenge, NegotiateFlags) = ntlm.parse_NTLM_CHALLENGE_MESSAGE(auth_header_value[5:])
user_parts = user.split('\\', 1)
DomainName = user_parts[0].upper()
UserName = user_parts[1]
auth = 'NTLM %s' % ntlm.create_NTLM_AUTHENTICATE_MESSAGE(ServerChallenge, UserName, DomainName, pw, NegotiateFlags)
headers[self.auth_header] = auth
headers["Connection"] = "Close"
headers = dict((name.title(), val) for name, val in headers.items())
try:
h.request(req.get_method(), req.get_selector(), req.data, headers)
# none of the configured handlers are triggered, for example redirect-responses are not handled!
response = h.getresponse()
def notimplemented():
raise NotImplementedError
response.readline = notimplemented
infourl = addinfourl(response, response.msg, req.get_full_url())
infourl.code = response.status
infourl.msg = response.reason
return infourl
except socket.error, err:
raise urllib2.URLError(err)
else:
return None
class HTTPNtlmAuthHandler(AbstractNtlmAuthHandler, urllib2.BaseHandler):
auth_header = 'Authorization'
def http_error_401(self, req, fp, code, msg, headers):
return self.http_error_authentication_required('www-authenticate', req, fp, headers)
class ProxyNtlmAuthHandler(AbstractNtlmAuthHandler, urllib2.BaseHandler):
"""
CAUTION: this class has NOT been tested at all!!!
use at your own risk
"""
auth_header = 'Proxy-authorization'
def http_error_407(self, req, fp, code, msg, headers):
return self.http_error_authentication_required('proxy-authenticate', req, fp, headers)
if __name__ == "__main__":
url = "http://ntlmprotectedserver/securedfile.html"
user = u'DOMAIN\\User'
password = 'Password'
passman = urllib2.HTTPPasswordMgrWithDefaultRealm()
passman.add_password(None, url, user , password)
auth_basic = urllib2.HTTPBasicAuthHandler(passman)
auth_digest = urllib2.HTTPDigestAuthHandler(passman)
auth_NTLM = HTTPNtlmAuthHandler(passman)
# disable proxies (just for testing)
proxy_handler = urllib2.ProxyHandler({})
opener = urllib2.build_opener(proxy_handler, auth_NTLM) #, auth_digest, auth_basic)
urllib2.install_opener(opener)
response = urllib2.urlopen(url)
print(response.read())
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