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[bluechips.git] / bluechips / lib / permissions.py
1 """
2 authkit authorization permission objects for BlueChips
3 """
4
5 from authkit.authenticate import AddDictToEnviron
6 from authkit.authorize import NotAuthenticatedError, NotAuthorizedError
7 from authkit.permissions import RequestPermission
8
9 from bluechips import model
10 from bluechips.model import meta
11
12 class BlueChipUser(RequestPermission):
13     def check(self, app, environ, start_response):
14         if 'REMOTE_USER' not in environ:
15             raise NotAuthenticatedError('Not Authenticated')
16         environ['user'] = meta.Session.query(model.User).\
17             filter_by(username=unicode(environ['REMOTE_USER'])).\
18             first()
19         if environ['user'] == None:
20             raise NotAuthorizedError('You are not allowed access.')
21         return app(environ, start_response)
22
23 class DummyAuthenticate(AddDictToEnviron):
24     """
25     Set the authkit.authenticate environment variable so
26     authkit.authorize shuts up
27     """
28     def __init__(self, app, app_conf):
29         newenv = {}
30         newenv['authkit.authenticate'] = True
31         newenv['authkit.config'] = {'setup.enable': True}
32         if 'fake_username' in app_conf:
33             newenv['REMOTE_USER'] = app_conf['fake_username']
34         super(DummyAuthenticate, self).__init__(app, newenv)
35
36 __all__ = ['BlueChipUser', 'DummyAuthenticate']