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authentik/passbook/oauth_client/views/core.py

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"""Core OAauth Views"""
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import base64
import hashlib
from logging import getLogger
from django.conf import settings
from django.contrib import messages
from django.contrib.auth import authenticate, get_user_model, login
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from django.contrib.auth.mixins import LoginRequiredMixin
from django.http import Http404
from django.shortcuts import get_object_or_404, redirect, render
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from django.urls import reverse
from django.utils.encoding import force_text, smart_bytes
from django.utils.translation import ugettext as _
from django.views.generic import RedirectView, View
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from passbook.lib.utils.reflection import app
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from passbook.oauth_client.clients import get_client
from passbook.oauth_client.errors import (OAuthClientEmailMissingError,
OAuthClientError)
from passbook.oauth_client.models import OAuthSource, UserOAuthSourceConnection
LOGGER = getLogger(__name__)
# pylint: disable=too-few-public-methods, too-many-locals
class OAuthClientMixin:
"Mixin for getting OAuth client for a source."
client_class = None
def get_client(self, source):
"Get instance of the OAuth client for this source."
if self.client_class is not None:
# pylint: disable=not-callable
return self.client_class(source)
return get_client(source)
class OAuthRedirect(OAuthClientMixin, RedirectView):
"Redirect user to OAuth source to enable access."
permanent = False
params = None
# pylint: disable=unused-argument
def get_additional_parameters(self, source):
"Return additional redirect parameters for this source."
return self.params or {}
def get_callback_url(self, source):
"Return the callback url for this source."
return reverse('oauth-client-callback', kwargs={'source_slug': source.slug})
def get_redirect_url(self, **kwargs):
"Build redirect url for a given source."
slug = kwargs.get('source_slug', '')
try:
source = OAuthSource.objects.get(slug=slug)
except OAuthSource.DoesNotExist:
raise Http404("Unknown OAuth source '%s'." % slug)
else:
if not source.enabled:
raise Http404('source %s is not enabled.' % slug)
client = self.get_client(source)
callback = self.get_callback_url(source)
params = self.get_additional_parameters(source)
return client.get_redirect_url(self.request, callback=callback, parameters=params)
class OAuthCallback(OAuthClientMixin, View):
"Base OAuth callback view."
source_id = None
source = None
# pylint: disable=too-many-return-statements
def get(self, request, *args, **kwargs):
"""View Get handler"""
slug = kwargs.get('source_slug', '')
try:
self.source = OAuthSource.objects.get(slug=slug)
except OAuthSource.DoesNotExist:
raise Http404("Unknown OAuth source '%s'." % slug)
else:
if not self.source.enabled:
raise Http404('source %s is not enabled.' % slug)
client = self.get_client(self.source)
callback = self.get_callback_url(self.source)
# Fetch access token
raw_token = client.get_access_token(self.request, callback=callback)
if raw_token is None:
return self.handle_login_failure(self.source, "Could not retrieve token.")
# Fetch profile info
info = client.get_profile_info(raw_token)
if info is None:
return self.handle_login_failure(self.source, "Could not retrieve profile.")
identifier = self.get_user_id(self.source, info)
if identifier is None:
return self.handle_login_failure(self.source, "Could not determine id.")
# Get or create access record
defaults = {
'access_token': raw_token,
}
existing = UserOAuthSourceConnection.objects.filter(
source=self.source, identifier=identifier)
if existing.exists():
connection = existing.first()
connection.access_token = raw_token
UserOAuthSourceConnection.objects.filter(pk=connection.pk).update(**defaults)
else:
connection = UserOAuthSourceConnection(
source=self.source,
identifier=identifier,
access_token=raw_token
)
user = authenticate(source=self.source, identifier=identifier, request=request)
if user is None:
try:
return self.handle_new_user(self.source, connection, info)
except OAuthClientEmailMissingError as exc:
return render(request, 'common/error.html', {
'code': 500,
'exc_message': _("source %(name)s didn't provide an E-Mail address." % {
'name': self.source.name
}),
})
except OAuthClientError as exc:
return render(request, 'common/error.html', {
'code': 500,
'exc_message': str(exc),
})
return self.handle_existing_user(self.source, user, connection, info)
# pylint: disable=unused-argument
def get_callback_url(self, source):
"Return callback url if different than the current url."
return False
# pylint: disable=unused-argument
def get_error_redirect(self, source, reason):
"Return url to redirect on login failure."
return settings.LOGIN_URL
# pylint: disable=unused-argument
def get_login_redirect(self, source, user, access, new=False):
"Return url to redirect authenticated users."
return 'overview'
# pylint: disable=unused-argument
def get_or_create_user(self, source, access, info):
"Create a shell auth.User."
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raise NotImplementedError()
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# pylint: disable=unused-argument
def get_user_id(self, source, info):
"Return unique identifier from the profile info."
id_key = self.source_id or 'id'
result = info
try:
for key in id_key.split('.'):
result = result[key]
return result
except KeyError:
return None
# pylint: disable=unused-argument
def handle_existing_user(self, source, user, access, info):
"Login user and redirect."
login(self.request, user)
messages.success(self.request, _("Successfully authenticated with %(source)s!" % {
'source': self.source.name
}))
return redirect(self.get_login_redirect(source, user, access))
def handle_login_failure(self, source, reason):
"Message user and redirect on error."
LOGGER.warning('Authentication Failure: %s', reason)
messages.error(self.request, _('Authentication Failed.'))
return redirect(self.get_error_redirect(source, reason))
def handle_new_user(self, source, access, info):
"Create a shell auth.User and redirect."
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was_authenticated = False
if self.request.user.is_authenticated:
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# there's already a user logged in, just link them up
user = self.request.user
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was_authenticated = True
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else:
user = self.get_or_create_user(source, access, info)
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access.user = user
access.save()
UserOAuthSourceConnection.objects.filter(pk=access.pk).update(user=user)
if not was_authenticated:
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user = authenticate(source=access.source,
identifier=access.identifier, request=self.request)
login(self.request, user)
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if app('passbook_audit'):
pass
# from passbook.audit.models import something
# something.event(user=user,)
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# Event.create(
# user=user,
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# message=_("Linked user with OAuth source %s" % self.source.name),
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# request=self.request,
# hidden=True,
# current=False)
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if was_authenticated:
messages.success(self.request, _("Successfully linked %(source)s!" % {
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'source': self.source.name
}))
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return redirect(reverse('user_settings'))
messages.success(self.request, _("Successfully authenticated with %(source)s!" % {
'source': self.source.name
}))
return redirect(self.get_login_redirect(source, user, access, True))
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class DisconnectView(LoginRequiredMixin, View):
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"""Delete connection with source"""
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source = None
aas = None
def dispatch(self, request, source):
self.source = get_object_or_404(OAuthSource, name=source)
self.aas = get_object_or_404(UserOAuthSourceConnection,
source=self.source, user=request.user)
return super().dispatch(request, source)
def post(self, request, source):
"""Delete connection object"""
if 'confirmdelete' in request.POST:
# User confirmed deletion
self.aas.delete()
messages.success(request, _('Connection successfully deleted'))
return redirect(reverse('user_settings'))
return self.get(request, source)
def get(self, request, source):
"""Show delete form"""
return render(request, 'generic/delete.html', {
'object': 'OAuth Connection with %s' % self.source.name,
'delete_url': reverse('oauth-client-disconnect', kwargs={
'source': self.source.name,
})
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})