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authentik/passbook/sources/oauth/backends.py

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"""passbook oauth_client Authorization backend"""
from django.contrib.auth.backends import ModelBackend
from django.db.models import Q
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from passbook.sources.oauth.models import OAuthSource, UserOAuthSourceConnection
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class AuthorizedServiceBackend(ModelBackend):
"Authentication backend for users registered with remote OAuth provider."
def authenticate(self, request, source=None, identifier=None):
"Fetch user for a given source by id."
source_q = Q(source__name=source)
if isinstance(source, OAuthSource):
source_q = Q(source=source)
try:
access = UserOAuthSourceConnection.objects.filter(
source_q, identifier=identifier
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).select_related("user")[0]
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except IndexError:
return None
else:
return access.user