mirror of https://github.com/jumpserver/jumpserver
223 lines
10 KiB
Python
223 lines
10 KiB
Python
"""
|
|
OpenID Connect relying party (RP) views
|
|
=======================================
|
|
|
|
This modules defines views allowing to start the authorization and authentication process in
|
|
order to authenticate a specific user. The most important views are: the "login" allowing to
|
|
authenticate the users using the OP and get an authorizartion code, the callback view allowing
|
|
to retrieve a valid token for the considered user and the logout view.
|
|
|
|
"""
|
|
|
|
import time
|
|
|
|
from django.conf import settings
|
|
from django.contrib import auth
|
|
from django.core.exceptions import SuspiciousOperation
|
|
from django.http import HttpResponseRedirect, QueryDict
|
|
from django.urls import reverse
|
|
from django.utils.crypto import get_random_string
|
|
from django.utils.http import is_safe_url, urlencode
|
|
from django.views.generic import View
|
|
|
|
from .utils import get_logger, build_absolute_uri
|
|
|
|
|
|
logger = get_logger(__file__)
|
|
|
|
|
|
class OIDCAuthRequestView(View):
|
|
""" Allows to start the authorization flow in order to authenticate the end-user.
|
|
|
|
This view acts as the main endpoint to trigger the authentication process involving the OIDC
|
|
provider (OP). It prepares an authentication request that will be sent to the authorization
|
|
server in order to authenticate the end-user.
|
|
|
|
"""
|
|
|
|
http_method_names = ['get', ]
|
|
|
|
def get(self, request):
|
|
""" Processes GET requests. """
|
|
|
|
log_prompt = "Process GET requests [OIDCAuthRequestView]: {}"
|
|
logger.debug(log_prompt.format('Start'))
|
|
|
|
# Defines common parameters used to bootstrap the authentication request.
|
|
logger.debug(log_prompt.format('Construct request params'))
|
|
authentication_request_params = request.GET.dict()
|
|
authentication_request_params.update({
|
|
'scope': settings.AUTH_OPENID_SCOPES,
|
|
'response_type': 'code',
|
|
'client_id': settings.AUTH_OPENID_CLIENT_ID,
|
|
'redirect_uri': build_absolute_uri(
|
|
request, path=reverse(settings.AUTH_OPENID_AUTH_LOGIN_CALLBACK_URL_NAME)
|
|
)
|
|
})
|
|
|
|
# States should be used! They are recommended in order to maintain state between the
|
|
# authentication request and the callback.
|
|
if settings.AUTH_OPENID_USE_STATE:
|
|
logger.debug(log_prompt.format('Use state'))
|
|
state = get_random_string(settings.AUTH_OPENID_STATE_LENGTH)
|
|
authentication_request_params.update({'state': state})
|
|
request.session['oidc_auth_state'] = state
|
|
|
|
# Nonces should be used too! In that case the generated nonce is stored both in the
|
|
# authentication request parameters and in the user's session.
|
|
if settings.AUTH_OPENID_USE_NONCE:
|
|
logger.debug(log_prompt.format('Use nonce'))
|
|
nonce = get_random_string(settings.AUTH_OPENID_NONCE_LENGTH)
|
|
authentication_request_params.update({'nonce': nonce, })
|
|
request.session['oidc_auth_nonce'] = nonce
|
|
|
|
# Stores the "next" URL in the session if applicable.
|
|
logger.debug(log_prompt.format('Stores next url in the session'))
|
|
next_url = request.GET.get('next')
|
|
request.session['oidc_auth_next_url'] = next_url \
|
|
if is_safe_url(url=next_url, allowed_hosts=(request.get_host(), )) else None
|
|
|
|
# Redirects the user to authorization endpoint.
|
|
logger.debug(log_prompt.format('Construct redirect url'))
|
|
query = urlencode(authentication_request_params)
|
|
redirect_url = '{url}?{query}'.format(
|
|
url=settings.AUTH_OPENID_PROVIDER_AUTHORIZATION_ENDPOINT, query=query)
|
|
|
|
logger.debug(log_prompt.format('Redirect'))
|
|
return HttpResponseRedirect(redirect_url)
|
|
|
|
|
|
class OIDCAuthCallbackView(View):
|
|
""" Allows to complete the authentication process.
|
|
|
|
This view acts as the main endpoint to complete the authentication process involving the OIDC
|
|
provider (OP). It checks the request sent by the OIDC provider in order to determine whether the
|
|
considered was successfully authentified or not and authenticates the user at the current
|
|
application level if applicable.
|
|
|
|
"""
|
|
|
|
http_method_names = ['get', ]
|
|
|
|
def get(self, request):
|
|
""" Processes GET requests. """
|
|
log_prompt = "Process GET requests [OIDCAuthCallbackView]: {}"
|
|
logger.debug(log_prompt.format('Start'))
|
|
callback_params = request.GET
|
|
|
|
# Retrieve the state value that was previously generated. No state means that we cannot
|
|
# authenticate the user (so a failure should be returned).
|
|
state = request.session.get('oidc_auth_state', None)
|
|
|
|
# Retrieve the nonce that was previously generated and remove it from the current session.
|
|
# If no nonce is available (while the USE_NONCE setting is set to True) this means that the
|
|
# authentication cannot be performed and so we have redirect the user to a failure URL.
|
|
nonce = request.session.pop('oidc_auth_nonce', None)
|
|
|
|
# NOTE: a redirect to the failure page should be return if some required GET parameters are
|
|
# missing or if no state can be retrieved from the current session.
|
|
|
|
if (
|
|
((nonce and settings.AUTH_OPENID_USE_NONCE) or not settings.AUTH_OPENID_USE_NONCE)
|
|
and
|
|
(
|
|
(state and settings.AUTH_OPENID_USE_STATE and 'state' in callback_params)
|
|
or
|
|
(not settings.AUTH_OPENID_USE_STATE)
|
|
)
|
|
and
|
|
('code' in callback_params)
|
|
):
|
|
# Ensures that the passed state values is the same as the one that was previously
|
|
# generated when forging the authorization request. This is necessary to mitigate
|
|
# Cross-Site Request Forgery (CSRF, XSRF).
|
|
if settings.AUTH_OPENID_USE_STATE and callback_params['state'] != state:
|
|
logger.debug(log_prompt.format('Invalid OpenID Connect callback state value'))
|
|
raise SuspiciousOperation('Invalid OpenID Connect callback state value')
|
|
|
|
# Authenticates the end-user.
|
|
next_url = request.session.get('oidc_auth_next_url', None)
|
|
logger.debug(log_prompt.format('Process authenticate'))
|
|
user = auth.authenticate(nonce=nonce, request=request)
|
|
if user and user.is_valid:
|
|
logger.debug(log_prompt.format('Login: {}'.format(user)))
|
|
auth.login(self.request, user)
|
|
# Stores an expiration timestamp in the user's session. This value will be used if
|
|
# the project is configured to periodically refresh user's token.
|
|
self.request.session['oidc_auth_id_token_exp_timestamp'] = \
|
|
time.time() + settings.AUTH_OPENID_ID_TOKEN_MAX_AGE
|
|
# Stores the "session_state" value that can be passed by the OpenID Connect provider
|
|
# in order to maintain a consistent session state across the OP and the related
|
|
# relying parties (RP).
|
|
self.request.session['oidc_auth_session_state'] = \
|
|
callback_params.get('session_state', None)
|
|
|
|
logger.debug(log_prompt.format('Redirect'))
|
|
return HttpResponseRedirect(
|
|
next_url or settings.AUTH_OPENID_AUTHENTICATION_REDIRECT_URI
|
|
)
|
|
|
|
if 'error' in callback_params:
|
|
logger.debug(
|
|
log_prompt.format('Error in callback params: {}'.format(callback_params['error']))
|
|
)
|
|
# If we receive an error in the callback GET parameters, this means that the
|
|
# authentication could not be performed at the OP level. In that case we have to logout
|
|
# the current user because we could've obtained this error after a prompt=none hit on
|
|
# OpenID Connect Provider authenticate endpoint.
|
|
logger.debug(log_prompt.format('Logout'))
|
|
auth.logout(request)
|
|
|
|
logger.debug(log_prompt.format('Redirect'))
|
|
return HttpResponseRedirect(settings.AUTH_OPENID_AUTHENTICATION_FAILURE_REDIRECT_URI)
|
|
|
|
|
|
class OIDCEndSessionView(View):
|
|
""" Allows to end the session of any user authenticated using OpenID Connect.
|
|
|
|
This view acts as the main endpoint to end the session of an end-user that was authenticated
|
|
using the OIDC provider (OP). It calls the "end-session" endpoint provided by the provider if
|
|
applicable.
|
|
|
|
"""
|
|
|
|
http_method_names = ['get', 'post', ]
|
|
|
|
def get(self, request):
|
|
""" Processes GET requests. """
|
|
log_prompt = "Process GET requests [OIDCEndSessionView]: {}"
|
|
logger.debug(log_prompt.format('Start'))
|
|
return self.post(request)
|
|
|
|
def post(self, request):
|
|
""" Processes POST requests. """
|
|
log_prompt = "Process POST requests [OIDCEndSessionView]: {}"
|
|
logger.debug(log_prompt.format('Start'))
|
|
|
|
logout_url = settings.LOGOUT_REDIRECT_URL or '/'
|
|
|
|
# Log out the current user.
|
|
if request.user.is_authenticated:
|
|
logger.debug(log_prompt.format('Current user is authenticated'))
|
|
try:
|
|
logout_url = self.provider_end_session_url \
|
|
if settings.AUTH_OPENID_PROVIDER_END_SESSION_ENDPOINT else logout_url
|
|
except KeyError: # pragma: no cover
|
|
logout_url = logout_url
|
|
logger.debug(log_prompt.format('Log out the current user: {}'.format(request.user)))
|
|
auth.logout(request)
|
|
|
|
# Redirects the user to the appropriate URL.
|
|
logger.debug(log_prompt.format('Redirect'))
|
|
return HttpResponseRedirect(logout_url)
|
|
|
|
@property
|
|
def provider_end_session_url(self):
|
|
""" Returns the end-session URL. """
|
|
q = QueryDict(mutable=True)
|
|
q[settings.AUTH_OPENID_PROVIDER_END_SESSION_REDIRECT_URI_PARAMETER] = \
|
|
build_absolute_uri(self.request, path=settings.LOGOUT_REDIRECT_URL or '/')
|
|
q[settings.AUTH_OPENID_PROVIDER_END_SESSION_ID_TOKEN_PARAMETER] = \
|
|
self.request.session['oidc_auth_id_token']
|
|
return '{}?{}'.format(settings.AUTH_OPENID_PROVIDER_END_SESSION_ENDPOINT, q.urlencode())
|