Use the admin creds in the HTTPClient when necessary (#85)

Currently, ceod uses the Kerberos credentials of the client when making requests to other services. This requires the client to send delegated credentials. Unfortunately the NPM krb5 package appears to be unable to perform delegation. So we will use the admin credentials instead (when appropriate).

Reviewed-on: #85
Reviewed-by: Raymond Li <raymo@csclub.uwaterloo.ca>
Co-authored-by: Max Erenberg <merenber@csclub.uwaterloo.ca>
Co-committed-by: Max Erenberg <merenber@csclub.uwaterloo.ca>
feature-80
Max Erenberg 3 months ago committed by Raymond Li
parent 1e452d10ce
commit c0c9736593
  1. 14
      ceo_common/model/HTTPClient.py

@ -6,7 +6,7 @@ from requests_gssapi import HTTPSPNEGOAuth
from zope import component
from zope.interface import implementer
from ceo_common.interfaces import IConfig, IHTTPClient
from ceo_common.interfaces import IConfig, IHTTPClient, IKerberosService
@implementer(IHTTPClient)
@ -40,10 +40,18 @@ class HTTPClient:
'opportunistic_auth': True,
'target_name': gssapi.Name('ceod/' + host),
}
if flask.has_request_context() and 'client_token' in g:
if flask.has_request_context():
# This is reached when we are the server and the client has
# forwarded their credentials to us.
spnego_kwargs['creds'] = gssapi.Credentials(token=g.client_token)
token = None
if g.get('need_admin_creds', False):
# Some Kerberos bindings in some programming languages can't
# perform delegation, so use the admin creds here.
token = component.getUtility(IKerberosService).get_admin_creds_token()
elif 'client_token' in g:
token = g.client_token
if token is not None:
spnego_kwargs['creds'] = gssapi.Credentials(token=token)
elif delegate:
# This is reached when we are the client and we want to
# forward our credentials to the server.

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