root / aai / middleware.py @ 60de282a
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1 | dbf97ed2 | Georgios Gousios | from time import time |
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2 | ef39e7ee | Georgios Gousios | from django.conf import settings |
3 | ef39e7ee | Georgios Gousios | from django.http import HttpResponse, HttpResponseRedirect |
4 | 89f86fd3 | Georgios Gousios | from synnefo.db.models import SynnefoUser |
5 | 8f377cd6 | Georgios Gousios | from synnefo.aai.shibboleth import Tokens, register_shibboleth_user |
6 | faa26af8 | Georgios Gousios | import time |
7 | 89f86fd3 | Georgios Gousios | |
8 | 89f86fd3 | Georgios Gousios | class SynnefoAuthMiddleware(object): |
9 | 89f86fd3 | Georgios Gousios | |
10 | 89f86fd3 | Georgios Gousios | auth_token = "X-Auth-Token"
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11 | 89f86fd3 | Georgios Gousios | auth_user = "X-Auth-User"
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12 | 89f86fd3 | Georgios Gousios | auth_key = "X-Auth-Key"
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13 | 89f86fd3 | Georgios Gousios | |
14 | 89f86fd3 | Georgios Gousios | def process_request(self, request): |
15 | ef39e7ee | Georgios Gousios | |
16 | 89f86fd3 | Georgios Gousios | if self.auth_token in request.META: |
17 | faa26af8 | Georgios Gousios | user = None
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18 | ef39e7ee | Georgios Gousios | #Retrieve user from DB or other caching mechanism
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19 | faa26af8 | Georgios Gousios | try:
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20 | faa26af8 | Georgios Gousios | user = SynnefoUser.objects.get(auth_token = request.META[self.auth_token])
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21 | faa26af8 | Georgios Gousios | except SynnefoUser.DoesNotExist:
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22 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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23 | faa26af8 | Georgios Gousios | |
24 | faa26af8 | Georgios Gousios | #Check user's auth token
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25 | faa26af8 | Georgios Gousios | if (time.time() -
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26 | faa26af8 | Georgios Gousios | time.mktime(user.auth_token_created.timetuple()) + |
27 | faa26af8 | Georgios Gousios | settings.AUTH_TOKEN_DURATION * 3600) > 0: |
28 | faa26af8 | Georgios Gousios | #The user's token has expired, re-login
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29 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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30 | faa26af8 | Georgios Gousios | |
31 | 89f86fd3 | Georgios Gousios | request.user = user |
32 | ef39e7ee | Georgios Gousios | return
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33 | 89f86fd3 | Georgios Gousios | |
34 | faa26af8 | Georgios Gousios | #A user authenticated by Shibboleth, must include a uniq id
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35 | dbf97ed2 | Georgios Gousios | if Tokens.SIB_EDU_PERSON_PRINCIPAL_NAME in request.META: |
36 | 57e59589 | Georgios Gousios | #We must somehow make sure that we only process
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37 | 57e59589 | Georgios Gousios | #SIB headers when coming from a URL whitelist,
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38 | 57e59589 | Georgios Gousios | #or a similar form of restriction
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39 | 1896d262 | Georgios Gousios | if request.get_host() not in settings.SHIBBOLETH_WHITELIST.keys(): |
40 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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41 | dbf97ed2 | Georgios Gousios | |
42 | 1896d262 | Georgios Gousios | user = None
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43 | 1896d262 | Georgios Gousios | try:
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44 | 1896d262 | Georgios Gousios | user = SynnefoUser.objects.get( |
45 | 1896d262 | Georgios Gousios | uniq = request.META[Tokens.SIB_EDU_PERSON_PRINCIPAL_NAME]) |
46 | 1896d262 | Georgios Gousios | except SynnefoUser.DoesNotExist:
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47 | 1896d262 | Georgios Gousios | pass
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48 | dbf97ed2 | Georgios Gousios | |
49 | dbf97ed2 | Georgios Gousios | #No user with this id could be found in the database
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50 | dbf97ed2 | Georgios Gousios | if user is None: |
51 | 57e59589 | Georgios Gousios | #Attempt to register the incoming user
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52 | dbf97ed2 | Georgios Gousios | if register_shibboleth_user(request.META):
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53 | 57e59589 | Georgios Gousios | user = SynnefoUser.objects.get( |
54 | 57e59589 | Georgios Gousios | uniq = request.META[Tokens.SIB_EDU_PERSON_PRINCIPAL_NAME]) |
55 | 57e59589 | Georgios Gousios | response = HttpResponse() |
56 | 57e59589 | Georgios Gousios | response[self.auth_token] = user.auth_token
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57 | 57e59589 | Georgios Gousios | response['Location'] = "/" |
58 | 57e59589 | Georgios Gousios | response.status_code = 302
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59 | 57e59589 | Georgios Gousios | return response
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60 | 57e59589 | Georgios Gousios | else:
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61 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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62 | dbf97ed2 | Georgios Gousios | |
63 | dbf97ed2 | Georgios Gousios | #User and authentication token valid, user allowed to proceed
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64 | dbf97ed2 | Georgios Gousios | return
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65 | 25380811 | Georgios Gousios | |
66 | dbf97ed2 | Georgios Gousios | #An API authentication request
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67 | 25380811 | Georgios Gousios | if self.auth_user in request.META and self.auth_key in request.META and 'GET' == request.method: |
68 | ef39e7ee | Georgios Gousios | # This is here merely for compatibility with the Openstack API.
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69 | ef39e7ee | Georgios Gousios | # All normal users should authenticate through Sibbolleth. Admin
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70 | ef39e7ee | Georgios Gousios | # users or other selected users could use this as a bypass
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71 | ef39e7ee | Georgios Gousios | # mechanism
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72 | 25380811 | Georgios Gousios | user = SynnefoUser.objects\ |
73 | 25380811 | Georgios Gousios | .filter(name = request.META[self.auth_user]) \
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74 | 25380811 | Georgios Gousios | .filter(uniq = request.META[self.auth_key])
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75 | 25380811 | Georgios Gousios | |
76 | 25380811 | Georgios Gousios | response = HttpResponse() |
77 | 25380811 | Georgios Gousios | if user.count() <= 0: |
78 | 25380811 | Georgios Gousios | response.status_code = 401
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79 | 25380811 | Georgios Gousios | else:
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80 | 25380811 | Georgios Gousios | response.status_code = 204
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81 | 25380811 | Georgios Gousios | response['X-Auth-Token'] = user[0].auth_token |
82 | 25380811 | Georgios Gousios | #TODO: set the following fields when we do have this info
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83 | 25380811 | Georgios Gousios | response['X-Server-Management-Url'] = "" |
84 | 25380811 | Georgios Gousios | response['X-Storage-Url'] = "" |
85 | 25380811 | Georgios Gousios | response['X-CDN-Management-Url'] = "" |
86 | 25380811 | Georgios Gousios | return response
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87 | ef39e7ee | Georgios Gousios | |
88 | ea2bea47 | Georgios Gousios | if settings.TEST:
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89 | 8f377cd6 | Georgios Gousios | if 'TEST-AAI' in request.META: |
90 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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91 | 8f377cd6 | Georgios Gousios | else:
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92 | 60de282a | Georgios Gousios | #Avoid redirect loops
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93 | 60de282a | Georgios Gousios | if 'Referer' in request.META and request.META['Referer'].endswith(settings.LOGIN_PATH): |
94 | 60de282a | Georgios Gousios | return
|
95 | 60de282a | Georgios Gousios | else :
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96 | 60de282a | Georgios Gousios | #No authentication info found in headers, redirect to Shibboleth
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97 | 60de282a | Georgios Gousios | return HttpResponseRedirect(settings.LOGIN_PATH)
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98 | dd53338a | Georgios Gousios | |
99 | dd53338a | Georgios Gousios | def process_response(self, request, response): |
100 | dbf97ed2 | Georgios Gousios | #Tell proxies and other interested parties that the
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101 | dbf97ed2 | Georgios Gousios | #request varies based on the auth token, to avoid
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102 | dbf97ed2 | Georgios Gousios | #caching of results
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103 | 57e59589 | Georgios Gousios | response['Vary'] = self.auth_token |
104 | dd53338a | Georgios Gousios | return response |