source: mauRepo/dj_security/trunk/dj_security/middleware.py @ 8680

Subversion URL: http://proj.badc.rl.ac.uk/svn/ndg/mauRepo/dj_security/trunk/dj_security/middleware.py@8680
Revision 8680, 3.6 KB checked in by mnagni, 7 years ago (diff)

Improved the encryption of the user data inside the returned auth_ticket.
Adds a FAKE_RESPONSE for developing purpose.

  • Property svn:mime-type set to text/plain
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1'''
2BSD Licence
3Copyright (c) 2012, Science & Technology Facilities Council (STFC)
4All rights reserved.
5
6Redistribution and use in source and binary forms, with or without modification,
7are permitted provided that the following conditions are met:
8
9    * Redistributions of source code must retain the above copyright notice,
10        this list of conditions and the following disclaimer.
11    * Redistributions in binary form must reproduce the above copyright notice,
12        this list of conditions and the following disclaimer in the documentation
13        and/or other materials provided with the distribution.
14    * Neither the name of the Science & Technology Facilities Council (STFC)
15        nor the names of its contributors may be used to endorse or promote
16        products derived from this software without specific prior written permission.
17
18THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
22BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
23OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29Created on 2 Nov 2012
30
31@author: mnagni
32'''
33from paste.auth.auth_tkt import AuthTicket
34from django.conf import settings
35
36import logging
37
38# Get an instance of a logger
39logger = logging.getLogger(__name__)
40
41class DJ_Security_Middleware(object):
42    """
43        Validates if the actual user is authenticated agains a
44        given authentication service.
45        Actually the middleware intercepts all the requests submitted
46        to the underlying Django application and verifies if the presence
47        or not of a valid paste cookie in the request.
48    """           
49    def process_response(self, request, response):
50        # 'auth_user' is set by the dj_security_login
51        # module after a succesfull authentication
52        if not request.POST.get('username', None) \
53                or not getattr(request, 'auth_user', False):
54            return response
55               
56        remote_ip = _calculate_remote_ip(request)
57        logger.debug("remote_ip: %s" % (remote_ip))     
58        username = request.POST['username']
59        token = AuthTicket(
60                    getattr(settings, 'SHARED_SECRET', 'sharedsecret'),
61                    username,
62                    remote_ip,
63                    user_data = getattr(request, 'auth_user', ''))               
64        logger.info("Logging %s from %s" % (username, remote_ip))
65        response.set_cookie('auth_tkt',
66                            token.cookie_value(),
67                            domain = getattr(settings, 'COOKIE_DOMAIN', None))
68        return response
69   
70def _calculate_remote_ip(request):
71    import socket
72    import urlparse   
73    remote_url = urlparse.urlparse(request.GET.get('r', ''))
74    logger.debug("remote_url: %s" % (str(remote_url)))
75    if remote_url.netloc != '':
76        logger.debug("gethostbyname_ex: %s" % (str(socket.gethostbyname_ex(remote_url.netloc.split(':')[0]))))
77        ips = socket.gethostbyname_ex(remote_url.netloc.split(':')[0])[2]
78        if len(ips) > 1:
79            return ips[1]           
80    return '127.0.0.1'
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